182 results about "Conducted Interference" patented technology

The Long Term Evolution Advanced (LTE-A) network, is a heterogeneous network, where macro and pico base stations (BSs) coexist to improve spectral efficiency per unit area. Systems and methods described herein attempt to provide a solution to the interference coordination problem between macro BSs and pico user equipments (UEs). Specifically, the systems and methods conduct interference coordination based on the concept of almost blank subframe (ABS), which is supported by the LTE-A standard. The macro BSs choose their ABS configurations in a cooperative way such that the overall system throughput is optimized.

The invention discloses a processing method and a device of downlink data, wherein the method includes the steps of receiving through user equipment (UE) a plurality of sets of resource indication information which is configurated for the UE by a base station and is sent through a high-rise signal, and storing the plurality of sets of resource indication information; receiving through the UE a subframe which is sent by the base station, obtaining downlink authorization indication information in the subframe; selecting resource indication information which is matched with the downlink authorization indication information from the plurality of sets of resource indication information through the UE, wherein the resource indication information is used for indicating a resource position where interference exists or a resource position and corresponding interference information of the resource position; and conducting interference treatment through the UE on downlink data which are sent to the UE. According to the processing method and the device of the downlink data, cooperation transmission (including: joint sending, joint scheduling, joint beam shaping and dynamic node selection) among different nodes for the same UE is achieved. Therefore, the effect of reducing resource waste and the effect of avoiding interference for data demodulation caused by a control domain or pilot frequency are achieved.

The invention belongs to the technical field of wireless communication signal processing and the technical field of full-duplex communication systems and relates to a method for suppressing passive intermodulation interface in a full-duplex communication system, in particular to a technology for suppressing passive intermodulation interface based on adaptive filtering. A simplified model of a passive nonlinear device is established and used for conducting interference suppression according to a digital signal processing method. The self-adaptive filtering algorithm is adopted as the estimation algorithm which is effect and enables hardware implementation to be achieved easily, so that compensation for passive intermodulation interface on intermediate frequency signals is achieved. A simulation result shows that passive intermodulation interface can be effectively suppressed and certain signal-to-ratio gain is achieved. The method is simple, computation complexity is low, resource cost is low, hardware implementation is easily achieved, the method is stable in performance, the system is strong in adaptability, the real-time performance is good, the method can be used for effectively suppressing passive intermodulation interference, and the higher signal to interference ratio gain is achieved.

The invention relates to the field of electromagnetic compatibility, in particular to a system and a method for modeling printed circuit board level conducted electromagnetic interference. Conducted interference of a power wire port of a certain control circuit board is quantitatively analyzed by extraction through a circuit model and modular modeling. Interference noise sources, equivalent resistance R, inductance L, capacitance C, conductance G parameters and internal logic circuits of devices are acquired by respectively calculating and equalizing circuits, main interference chips, power modules and the like on the circuit board, modular package is performed, so that an equivalent circuit model of the whole power system is built, and conducted interference waveforms and quantitative spectra of points on a power wire can be obtained by circuit simulation. Conducted electromagnetic interference frequency and amplitude of key circuits on the printed circuit board can be quantitatively analyzed at a pre-design phase, portions with poor electromagnetic compatibility are found and optimized, the electromagnetic interference degree of the whole circuit board is reduced, and research and development cycle and cost can be reduced.

The invention discloses an interference suppression diversity and combination method which comprises the steps of calculating the capacities of a level estimation value of a diversity signal and a channel parameter estimation value; calculating the noise variance and cross correlation coefficient of the diversity signal to construct a covariance matrix; constructing a weighted matrix according to the covariance matrix to conduct interference, suppression and combination; and conducting equal demodulation according to a result of the interference, suppression and combination. The invention also discloses an interference suppression diversity and combination system which comprises a calculation module, a covariance matrix construction module, an interference suppression module and an equal demodulation module. The method greatly reduces the complexity of a system, improves the receiving sensitivity of a receiver, and enlarges the coverage of a base station, thereby providing an interference suppression diversity and combination technical proposal which has the advantages of low complexity, high estimation accuracy and easy realized engineering.

A system and method for automating the generation of manufacturing frame designs are provided. A frame design processing server includes a plurality of modules for generating frame designs. The frame design processing server obtains a specification of components for a vehicle and processes the specification according frame design rules and three-dimensional representations of data. The frame design processing server configures positions for the each of the specified components based upon processing data in the frame design rules and based upon conducting interference checks. The resulting configuration can be exported as manufacturing data and / or three-dimensional representations of the frame design.

The invention relates to a conducted interference noise structure extracting device and structure extracting method, which dose structure extracting and feature analyzing to the EMI noise to obtain the structure extracting network capability method and device. The device is formed by a conducted noise identifying device (1), a noise character analysis network (2), an interference noise receiver (3) and a tested device (4), wherein the input end of the conducted noise identifying device (1) is connected with the stage line, the earth line and the center line of the power system; the output end of the conducted noise identifying device (1) is connected with the stage line, the earth line and the center line of the tested device (4) and the input end of the noise character analysis network (2); the output end of the noise character analysis network (2) is connected with the interference noise receiver (3).

The invention provides a cognitive radio user space division multiplexing method based on interference alignment. According to the cognitive radio user space division multiplexing method based on interference alignment, in the situation that a primary system has certain tolerance against external interference, a cognitive system obtains the tolerance of the primary system against external interference, and the tolerance serves as the reference for the fact that the cognitive system selects cognitive radio users to conduct data transmission. The cognitive system conducts interference elimination on the selected cognitive radio users according to the interference alignment method. When the cognitive radio users are selected, the sum of the maximum possible interference values leaked to the primary system by the cognitive radio users and the tolerance of the primary system against the interference are compared through the Rayleigh quotient characteristics of a channel matrix, and therefore the effect that the interference in the primary system from the selected cognitive radio users is controllable is achieved. By the adoption of the cognitive radio user space division multiplexing method based on interference alignment, the interference alignment technology is widely applied to the cognitive radio network, and the accessibility and the rate of a cognitive radio system are improved.

The invention discloses a method for conducting interference measurement on interference measurement resources. The method comprises the steps that a base station side sends N sets of interference measurement resources on non-full bandwidths or full bandwidths, and position indication signals of all the interference measurement resources are sent to a terminal side; the terminal side can determine the positions of the interference measurement resources according to the position indication signals of the interference measurement resources, and interference measurement is conducted on the interference measurement resources. The invention further discloses a device for conducting interference measurement on the interference measurement resources. According to the scheme, the time domain and frequency domain resource overheads and high-level signaling overheads are adopted as less as possible, and interference measurement is achieved on the different interference measurement resources.

The present invention relates to a device-to-device (D2D) communication method and an apparatus therefor. A device-to-device communication method according to an embodiment of the present invention may comprise the steps of: transmitting, to a base station, a device-to-device communication registration request message including identification information and interest information of a device-to-device communication service; receiving, from the base station, a device-to-device communication registration response message including device-to-device communication resource information which has been allocated according to the identification information of the device-to-device communication service; and transmitting a device-to-device communication signal using the allocated device-to-device communication resource. According to an embodiment of the present invention, it is possible to ensure a QoS differentiated according to the service of an application which is used by various users, perform a device-to-device communication process which is independent of a data communication, and conduct interference management under simultaneous connection with a cellular user.

The invention is suitable for the field of power factor correction, and provides a high-power factor constant-current circuit and a power source. The high-power factor constant-current circuit comprises an electromagnetic compatible module, an input rectifying and filtering circuit, a power converting and power factor correcting circuit, an output rectifying and filtering circuit and a sampling and amplifying circuit. The electromagnetic compatible module is used for receiving the input of alternating current, inhibiting the conducted interference in the circuit and outputting the alternating current; the input rectifying and filtering circuit is used for rectifying the alternating current to be a pulse direct current; the power converting and power factor correcting circuit is used for carrying out power conversion and power factor correction on the pulse direct current according to a sampling feedback signal; the output rectifying and filtering circuit is used for rectifying and filtering the current output by the power converting and power factor correcting circuit to improve output waveform; and the sampling and amplifying circuit is used for sampling the voltage and the current output by the output rectifying and filtering circuit to output the sampling feedback signal. The invention realizes the output of the high-power factor constant current and reduces a primary power factor correcting circuit with simpleness, reliability and low cost.

The invention relates to a multi-beam laser interference micro-nano processing device and method based on a Dammann grating and reflectors. The double-layer Dammann transmission grating is used as a beam splitter and divides a single laser beam which is collimated, expanded and shaped into multiple beams of coherent light, wherein the multiple beams of coherent light have the same amplitude intensity; besides, the reflectors on sliding ways are used for adjustment of the inclined angle between the light beams and selection of a processing period, and a light array achieving uniform intensity distribution of all grades of light is obtained; and the multiple beams of coherent light are gathered to the surface of a material to be processed to conduct interference, so that interference laser stripes are obtained, and therefore a periodical parallel-trench micro-nano structure is processed. The multi-beam laser interference micro-nano processing device and method based on the Dammann grating and the reflectors replaces a disperse type multi-support scheme in an existing system and greatly improves the convenience, reliability and efficiency of the system. The multi-beam laser interference micro-nano processing device and method based on the Dammann grating and the reflectors have the advantages that a light path is convenient to adjust, the processing size is controllable, the processing efficiency is high, the multi-beam laser interference micro-nano processing device and method based on the Dammann grating and the reflectors are suitable for low-cost mass production, and operation is easy.

The invention relates to a comprehensive DME pulse interference restraining method. The comprehensive DME pulse interference restraining method includes the steps of inputting signals received by a receiver, and calculating the interference duty ratio of the input signals; if the interference duty ratio of the input signals is smaller than a threshold value gamma, conducting DME pulse interference restraining with the time-frequency mixed filtering method; if the interference duty ratio of the input signals is larger than the threshold value gamma, conducting DME pulse interference restraining with the parameter estimation and wavelet packet conversion jointed method. The comprehensive DME pulse interference restraining method has the advantages that the method is combined with a traditional DME pulse interference restraining method and the parameter estimation and wavelet packet conversion jointed method, the suitable method can be adaptively selected for conducting interference restraining according to interference occasions with different pulse interference duty ratios, the calculation complexity of the interference restraining performance and interference restraining algorithms is comprehensively considered, and the method has a certain practical value.

Provided is an interference control method that, in the case where a macro terminal does not exist close to the femtocell terminal, improves the coverage performance and bit rate of femtocell terminals, and also prevent deterioration in the performance of femtocell base stations, femtocell terminals, or macro terminals. In this method, the macro terminals (102, 103) will transmit, when the difference value between the RSRQs of the femtocell base stations (104) and the RSRQ of a macro base station (101) is greater than a prescribed threshold value, a request to start an interference control, the difference value, and identification information of the femtocell base station (104), to the macro base station (101). The macro base station (101) will transmit, on the basis of the request, the difference value, and identification information, an interference-control start-up request signaling to the femtocell base station (104) specified by the identification information. The femtocell base station (104) will conduct interference control, on the basis of the interference-control start-up request signaling, to femtocell terminals (105) registered with the femtocell base station (104).

The invention provides a cascaded synchronous large-scale data collecting system based on a network and distributed type power supply. The cascaded synchronous large-scale data collecting system comprises a plurality of power supply and data collecting sub-systems, an industrial Ethernet switch and a plurality of data collecting working stations. Each power supply and data collecting sub-system comprises main power stations. External power supplies have access to the main power stations, the main power stations conduct interference resistance and current limiting on the external power supplies so that electric power can be supplied outward and clock synchronization of all the main power stations can be achieved, and the main power stations provide an Ethernet switch interface and a power supply interface. The external power supplies have access to the power stations, interference resistance and current limiting are conducted on the external power supplies, electric power is supplied outward, and the Ethernet switch interface is provided; each collecting terminal receives input signals and processes the input signals to generate processed data so that clock synchronization of all the collecting terminals can be ensured; the industrial Ethernet switch receives the processed data and sends the processed data to the data collecting working stations; each data collecting working station receives the processed data. By means of the cascaded synchronous large-scale data collecting system, cascaded communication and power supply synchronous data collecting of the whole system can be achieved.

The embodiments of the invention disclose an image processing method, an apparatus, and a mobile terminal. The method includes acquiring a module image corresponding to a contact surface of a fingerprint identification module; receiving a fingerprint image acquisition instruction; based on the fingerprint image acquisition instruction, acquiring a fingerprint image formed by the contact surface of the fingerprint identification module; conducting interference-removing processing on the fingerprint image based on the module image. The method conducts interference-removing processing on the fingerprint image through acquiring the module image, and eliminates the interference imposed on the fingerprint image due to tarnished contact surface of the fingerprint identification module, thus increasing the accuracy of fingerprint identification.

A method, device and system for detecting a random access signal in an interference environment. The method comprises: receiving a time-domain random access signal, and acquiring a frequency-domain random access signal; acquiring an interference elimination weight according to the frequency-domain random access signal and a frequency-domain local cyclic shift sequence, and conducting interference elimination on the frequency-domain random access signal using the obtained interference elimination weight; and conducting peak value detection on the frequency-domain random access signal after the interference is eliminated. The device comprises: an acquisition module configured to receive a time-domain random access signal and acquire a frequency-domain random access signal; an interference elimination module configured to calculate an interference elimination weight according to the frequency-domain random access signal and a frequency-domain local cyclic shift sequence and conduct interference elimination on the frequency-domain random access signal; and a detection module configured to conduct peak value detection on the frequency-domain random access signal after the interference elimination.

The invention discloses a centralized electricity-saving lamp power source, comprising an EMC filter circuit, a bridge rectifier circuit and a PFC circuit which are sequentially connected, the PFC circuit comprises an embedded-type PFC chip and external parameter circuit, a BOOST boost inductor, an MOS pipe, and a main electrolytic capacitor, wherein, the PFC circuit is the active or passive PFC circuit. The centralized electricity-saving lamp power source provided by the invention has low cost, small occupied space, long service life, and decreased conducted interference of the whole lighting system.

The invention provides an EMI filter and a power supply EMI filter access circuit. The EMI filter comprises an adjustable common-mode inductor, a first differential-mode operating capacitor, a second differential-mode operating capacitor, an adjustable differential-mode inductor, a first common-mode operating capacitor and a second common-mode operating capacitor, wherein the first differential-mode operating capacitor is connected with an input end of the adjustable common-mode inductor in parallel; the second differential-mode operating capacitor is connected with an output end of the adjustable common-mode inductor in parallel; an input end of the adjustable differential-mode inductor is connected with the output end of the adjustable common-mode inductor in parallel; and the first common-mode operating capacitor and the second common-mode operating capacitor are connected in parallel with the input end of the adjustable differential-mode inductor, and a parallel structure is formed between the first common-mode operating capacitor and the second common-mode operating capacitor. According to the embodiment of the invention, the EMI filter can provide high insertion loss in a conducted interference frequency range, so as to attenuate EMI signals to the maximum, thus the electromagnetic property of equipment can meet the standard, and the filtering effect is effectively improved.

The invention discloses an optimization method for conducted interference fault correcting by using a conduction test standard-exceeding strategy. A conducted emission curve and a conducted susceptibility curve are used for being compared with national military standard requirements, and a standard-exceeding area is obtained; area integral is adopted for quantizing the standard-exceeding area to obtain conducted emission index weight and conducted susceptibility index weight; and finally airborne device electromagnetic compatibility classification weight, the conducted emission index weight and the conducted susceptibility index weight are combined to obtain airborne device electromagnetic compatibility classification weight expectation. The optimization method combines airborne device electromagnetic compatibility conducted interference fault and electromagnetic compatibility of a whole plane by means of index quantization and weight distribution, gives overall consideration to factors such as all airborne device electromagnetic compatibility conducted emission, conducted susceptibility and electromagnetic compatibility classification, conducts index quantization and corresponding weight distribution, obtains affecting degree of airborne device conducted interference fault on the electromagnetic compatibility of the whole plane, determines priority of an airborne device electromagnetic compatibility conducted interference fault correcting sequence, and provides proof for determining a sequence of electromagnetic compatibility rectification.

The invention discloses a conductive common-mode / differential-mode noise separation method, belonging to the technical field of conductive electromagnetic compatibility noise measurement. Radiofrequency current probe measurement and software separation calculation are combined, and the method is suitable for conductive interference measurement on a single phase line. The method comprises the following measuring steps: I, directly measuring a phase line, center line and common-mode conducted interference spectrum by using a radiofrequency current probe, connecting the output end of the current probe to a spectrometer through a coaxial line, and driving the spectrometer to work in a peak detection mode; II, calibrating interference spectrum data obtained in the step I, and measuring the transmission admittance of the current probe and the coaxial line used in the step I by using a vector network analyzer; III, putting the corrected data IL, IN and ICM into a formula to obtain a differential-mode current spectrum IDM so as to obtain the interference voltage in a differential mode and a common mode. By adopting a test method, the conducted interference spectrum on each line can be measured rapidly, and separation of common-mode and differential-mode interference is realized. The method is mainly applied to online measurement of electromagnetic compatibility noise.

The invention relates to an electromagnetic disturbance waveform feature extracting method for a transformer substation gas insulation switch and belongs to the field of the electromagnetic compatibility technology for secondary equipment of transformer substations. The electromagnetic disturbance waveform feature extracting method for the transformer substation gas insulation switch specially comprises the steps that when on-off operation is conducted on an GIS transformation substation under different voltage classes, electromagnetic disturbance waveform data of the port of a sensor on a GIS pipeline or the port of an intelligent component in a GIS collection control cabinet are measured and recorded; the obtained electromagnetic disturbance waveform data are calculated according to a formula for the common-mode voltage and difference-mode voltage in electromagnetic compatibility conducted interference, so that a common-mode interference waveform and a difference-mode interference waveform are obtained; macroscopic feature parameters and microscopic feature parameters are extracted respectively. By the adoption of the electromagnetic disturbance waveform feature extracting method for the transformer substation gas insulation switch, all macroscopic feature parameters and all microscopic feature parameters of disturbance waveforms can be obtained reliably and accurately, and quantitative analysis of the waveforms of electromagnetic disturbance caused by on-off operation of the GIS transformation substation is achieved.

The invention provides a protective phase airborne interference synthetic aperture radar (SAR) terrain altitude self-adaption motion compensation method. The method can essentially remove influences of fluctuation of an unknown terrain on motion compensation precision and comprises the following steps of (1) respectively utilizing a single antenna SAR motion compensation method to conducting motion compensation on interference SAR two channel data, and obtaining an interference multiple-image pair; (2) conducting reverse phase compensation on each multiple image, and enabling phase information of each pixel of each multiple image to restore to correspond to an antenna phase center track before motion compensation is carried out; (3) conducting multiple-image registering, interference phase extracting, flat-removing phase and phase unfolding, and obtaining an interference phase image without winding; (4) calculating slant distance value corresponding to all pixels of SAR multiple images of a first channel before the motion compensation is carried out; (5) calculating the interference base line position, the base line length and the base line inclined angle before the motion compensation is carried out according to antenna phase center track data of two channels; and (6) using the interference phase, the slant distance value, the interference base line position, the base line length and the base line inclined angle before the motion compensated is carried out to conduct interference calculating.

The invention provides a power-flow current breaking capacity test synthetic circuit synchronous control device and method. The device comprises a power frequency oscillation circuit as well as a power frequency oscillation startup detection unit, a trigger phase control unit and a photoelectric conversion and ignition unit connected in sequence. The device and the method can avoid the problem of time delay caused by detecting a switch-on contact or circuit current signal, improve the accuracy of time control, reduce electromagnetic coupling interference of self circuit, effectively avoid spatial electromagnetic coupling interference and conducted interference intrusion of a power supply line, ensure safe and reliable operation of the circuit, effectively avoid false triggering accidents caused by high-current electromagnetic interference at the moment of power frequency startup and shock ignition of a system and strong electromagnetic pulse spatial coupling, and improve the running reliability and safety of the system.

The invention discloses a detection light dual-mode imaging system of integrating non-contact photoacoustics and optical coherence tomography. The system includes a computer, a photoacoustic excitation module, a common detection end module, a common reference arm module, a sample arm module, a photoacoustic imaging data acquisition module and an OCT detection module; a detection light signal passes through a second focusing lens, an X-Y scanning galvanometer, a dichroic mirror and a third lens in sequence, and returns to a coupler to conduct interference on light returning from the common reference arm module, and a first interference signal passes through a circulator and the OCT detection module in sequence, and is transmitted to the computer; excitation light emitted by an excitation light source passes through a second reflector, a first focusing lens, a focus adjusting lens andthe dichroic mirror, and is combined with the detection light to form coaxial light, and a second interference signal passes through the circulator, a balance detector and a high-pass filter in sequence, and is transmitted to a data acquisition card. According to the detection light dual-mode imaging system of integrating non-contact photoacoustics and optical coherence tomography, an existing non-contact OCT-PA multimode imaging system is improved, and the system structure is simplified.

The invention discloses a lithium-ion battery pack system with high electromagnetic compatibility. The lithium-ion battery pack system comprises an outer system frame, a plurality of battery modules, a local electric control unit (LECU) assembly, a battery management unit (BMU) assembly, a high-voltage wire bundle, a low-voltage wire bundle, a communication wire bundle and a module sampling wire bundle, wherein a multi-layer structure is adopted by the high-voltage wire bundle; and a vertical wiring mode is adopted by the high-voltage wire bundle and the low-voltage wire bundle, so that the radio frequency interference resistance of the system is enhanced. A magnetic ring is arranged on a low-voltage connector, so that the conducted interference resistance and the bulk current injection resistance of the system are enhanced; and external conducted emission of high-frequency noise in the system through the low-voltage wire bundle can also be reduced. A twisted-pair connection mode is adopted by the communication wire bundle, so that the radio frequency interference resistance of the system is enhanced; and external radiated emission of high-frequency noise is also reduced. Through a sealing mode and a grounding mode of a metal housing of a printed circuit board (PCB) in the BMU assembly, the radio frequency interference resistance of the PCB and the conducted interference resistance of the system are enhanced.

The invention discloses a liquid cooling radiator of an engine with an electromagnetic shielding device. The liquid cooling radiator of the engine with the electromagnetic shielding device comprises a sealing shell (3), a cooling fan (4), a filter (15), a plurality of upper cooling water pipes (10), a plurality of lower cooling water pipes (14), an upper water inlet passage (7), an upper water discharge passage (8), a lower water inlet passage (11) and a lower water discharge passage (12) and is characterized in that the upper cooling water pipes (10) and upper honeycomb-shaped cooling belts (9) embedded between the upper cooling water pipes make up an upper cooling fin component (1), the lower cooling water pipes (14) and lower honeycomb-shaped cooling belts (13) embedded between the lower cooling water pipes make up a lower cooling fin component (2), the upper cooling water pipes (10) are distributed in rectangular shape and are in firm contact with the upper honeycomb-shaped cooling belts (9), the lower cooling water pipes (14) are distributed in rectangular shape and are in firm contact with the lower honeycomb-shaped cooling belts (13), and the upper cooling water pipes (10) and the lower cooling water pipes (14) are distributed on the whole ventilation surface; each of the upper honeycomb-shaped cooling belts (9) and lower honeycomb-shaped cooling belts (13) is composed of a plurality of cooling strips (16) in a hexagonal honeycomb mode, and the cooling strips are designed according to the frequency spectrum of electromagnetic noise to be shielded. The liquid cooling radiator of the engine with the electromagnetic shielding device effectively shields the radiation and conducted interference of a fan motor.

The invention belongs to the field of bridge monitoring and particularly relates to a system and method for continuously monitoring bridge deformation through foundation radar. The system comprises concrete piers (3), fixed supports (2) and foundation radar instruments (1), wherein each concrete pier (3) is fixed to a foundation, each fixed support (2) is connected with the corresponding concrete pier (3), and each foundation radar instrument (1) is connected with the corresponding fixed support (2). Each foundation radar instrument (1) is used for conducting interference-strategy measurement on a bridge (4). The foundation radar instruments (1), the fixed supports (2) and the concrete piers (3) are located between the bridge (4) and the foundation. By the adoption of the system and method for continuously monitoring bridge deformation through the foundation radar, the problem that an existing instrument can only monitor bridge deformation for once is solved, and the design basis stability of the instruments is achieved; through the method for continuous monitoring, an operator can continuously monitor a monitored target for a long time without arranging the instruments for a long time; the system is simple in structure and convenient to debug, and capable of continuously and accurately monitoring the health condition of the bridge.

An outdoor lightning protection power supply system comprises an AC distribution plant, an AC / DC rectifier and a backup battery, wherein a lightning protection system, a main earthing bar as well as a filter for absorbing AC load conducted interference is provided at the input terminal of the AC distribution plant, and there is provided an electrical box for accommodating them. Take the system lightning protection, the system earthing and the system filtering, as well as the system power supply into consolidated consideration, the present invention not only has the advantage of small volume and integration convenience, but also improves the reliability of the power supply system. Since the integration of the system is significantly improved, the number of the lightning protection module can be reduced, whereby reducing the system cost and saving the available space of the outdoor communication cabinet. The invention can achieve the lightning protection of IEC61643-1 class I+II level in a small volume, the rated discharge current of which is up to 50 KA (10 / 350 us), and the protective voltage level Up is less than 1.5 KV, thus is suitable for geography weather type of a majority of areas in China, and can be applied to outdoor tele-communication apparatus, or substitute the existing power supply modules directly and upgrade to the lightning protective characteristic immediately.

The present invention relates to an apparatus and a corresponding method for non-invasive intracardiac electrocardiography (ECG) by use of a magnetic and electrically conducting interference device (210). An MPI-based ECG mapping technique is proposed, wherein an interference device (210), e.g. an electrically conducting rod containing soft magnetic material, is steered through the vessel system and the heart using magnetic fields generated by a magnetic particle imaging (MPI) system so that the ECG signals measured in parallel are influenced. Using appropriately adapted evaluation means (153) this influence of the interference device (210) on the ECG signals can be evaluated to gain spatially resolved information about the electrical heart activity.