283results about How to "Eliminate Interfering Signals" patented technology

An apparatus and method for interference cancellation and synchronization maintenance over interference channel estimation in a communication system are provided. An interference channel estimator fixes synchronization and estimates an interference signal. An interference signal controller eliminates the estimated interference signal from a received RF signal. A synchronization unit unfixes fixed synchronization and tracks synchronization when the interference signal cancellation is stable. A data buffer stores data from which the interference signal is canceled.

Embodiments of the present invention provide a method, an apparatus, and a system for processing an interference signal, so as to eliminate an interference signal in a full duplex multi-antenna system. The method includes: receiving a radio signal, where the signal includes a self-interference signal of a transmit antenna, and the self-interference signal includes a first self-interference signal, and a second self-interference signal; performing primary interference cancellation processing, by using a first reference signal, on the received signal to eliminate the first self-interference signal; and performing secondary interference cancellation processing, by using a second reference signal, on the signal after the primary interference cancellation processing to eliminate the second self-interference signal.

The embodiment of the invention discloses an inter-cell interference suppression method, a system and base station and a user terminal, relating to communication filed. The invention solves the problem of too much network communication resource occupation caused by a great amount of scheduling information required to be transported among cell base stations. The inter-cell interference suppressionmethod comprises the following steps: determining an interference cell; acquiring the scheduling information of an interference terminal meeting a terminal constraint condition in the interference cell; and carrying out interference suppression operation on user terminals meeting the terminal constraint condition in the original cell according to the scheduling information of the interference terminal. The technical scheme provided by the embodiment of the invention can be applied in 3G network and next generation wireless network.

The invention discloses a wrist watch type multi-parameter biosensor and relates to a self-adaptive detection method for physiological parameters and a multi-parameter intelligent monitoring wrist watch by the adoption of the method. The method comprises the steps that (1) human physiological parameter signals are collected; (2) the human physiological parameter signals are subjected to self-adaptive wavelet decomposition, and feature predictors and updaters are selected point by point in the decomposition process; (3) waveform analysis is conducted, interference signals in the decomposed signals are eliminated, and human physiological parameter signals without interference are obtained. The monitoring wrist watch comprises a base body, wherein the base body is provided with a central processing unit, a physiological parameter sensor used for collecting the human physiological parameter signals and various other sensors. The central processing unit processes data by the adoption of a self-adaptive wavelet decomposition method to obtain the human physiological parameter signals without interference. The wrist watch type multi-parameter biosensor effectively solves the problem of instability caused by large contact resistance generated when a daily wearing mode is adopted. The wrist watch type multi-parameter biosensor is convenient to use and can collect various human physiological signals, movement signals, environment signals and the like in real time.

The invention discloses an acoustic signal based device and method for detecting gas pipeline leakages. The detection device comprises an acoustic sensor group, a signal conditioner, an analog-to-digital converter, a data transmission medium and a central control computer. The detection method comprises that acoustic sensors are installed on a pipeline to be tested to collect signals, collected acoustic signals are subjected to signal conditioning through the signal conditioner, then voltage signals are converted into digital signals through the analog-to-digital converter, converted digital signals are transmitted to the central control computer through the data transmission medium, and an acoustic signal display, filtering, feature extraction and leakage judgment program which is written through LabVIEW software is installed in the central control computer. The device and the method have the advantages of being low in cost, high in device sensitivity, high in adaptability and the like.

The invention discloses a signal energy synchronous transmission relay transmission method in physical layer safety communication. The method comprises the following implementation steps that: 1) a source node transmits an energy signal and calculates an optimal energy collection time scale alpha<H>, and an unreliable relay node and a destination node collect energy; 2) in a first (1-alpha<H>)T / 2 time slot, the source node transmits an information signal x<s>, the destination node transits an interference signal x<z>, and the unreliable relay node receives the signals; 3) in a second (1-alpha<H>)T / 2 time slot, the unreliable relay node forwards the received mixed signals, and the destination node receives the signals; 4) the destination node performs adaptive interference cancellation for the mixed signals forwarded by the unreliable relay node, and performs information detection on the signals of which interference is cancelled. The method provided by the invention can effectively prolong network service life of a relay network, and has low implementation complexity and high transmission safety, thus, the method can be used for a physical layer safety relay collaborative communication system.

The invention relates to an adaptive interference cancellation method for a radar jammer. The adaptive interference cancellation method comprises the following steps: acquiring an external signal d received by a detection antenna on the radar jammer in real time, simultaneously acquiring an interference signal which is generated in the radar jammer and is not transmitted by a transmitting antenna of the radar jammer and using the interference signal as a reference interference signal J; then conveying the external signal d and the reference interface signal J to an adaptive filter to carry out adaptive interference cancellation. According to the adaptive interference cancellation method, an active digital adaptive cancellation technology is adopted; related cancellation principles are utilized; a convergence step size is regulated; compromise of a convergence rate and convergence stability in an adaptive interference cancellation algorithm is effectively realized; finally, the interference signal entering the detection antenna can be effectively eliminated and a useful detection signal is obtained.

The present invention discloses a container sorting system capable of increased sorting efficiency. The present invention discloses a device in which the distance is shortened between detection and ejection of containers being sorted by reflective infrared radiation, transmission infrared radiation, or both. The present invention also includes a method of operating such device.

Provided are a virtual multi-antenna method for an orthogonal frequency division multiplexing (OFDM) system and an OFDM-based cellular system. The virtual multi-antenna method includes grouping sub-carriers in a frequency domain of an OFDM symbol and generating at least one group including G sub-carriers; and regarding the G sub-carriers included in the at least one group as multiple channels used in a multi-antenna technique and virtually applying the multi-antenna technique to the transmission and reception of the OFDM symbol. The virtual multi-antenna method can effectively reduce an interference signal and obtain the effects of a spatial division multiple access (SDMA) technique without physically using multiple antennas.

The invention belongs to the technical field of mass spectrographies, and relates to an ion transmission system for an inductively coupled plasma mass spectrometry. The ion transmission system comprises an ion sampling cone, an interception cone, an extraction lens, an ion deflecting electrode and ion focusing lenses, wherein the centers of all the parts are on coaxial horizontal lines; space electric field distribution is generated under a DC voltage; ions deflect, focus and are transmitted under the action of the electric field; photons and neutral particles in a sample are free from the action of the electric field, transmitted linearly, and blocked while meeting the ion deflecting electrode; electrified ions are guided by the electric field, bypass the ion deflecting electrode, and focus into an ion beam under the action of the electric field of the focusing lenses, and then are transmitted to a mass analyzer. The ion transmission system has the advantages that the structure is simple; the use is convenient; interference signals generated due to the entering of the photons and the neutral particles can be removed effectively; the ion transmission efficiency and the sensitivity of the inductively coupled plasma mass spectrometry are improved.

The invention discloses a physical layer network coding and design method for a bidirectional relay channel of a cellular system, which is characterized by comprising the steps as follows: a base station precodes sent signals and then sends to a relay node, and at the same time, users also respectively send respective information to a relay end; the relay node receives the information sent by the base station and users and performs physical layer network coding hybrid, the signals subjected to physical layer network coding are precoded so as to ensure that the signals received by one user can not be disturbed by other users, and the signals are forwarded; and the users and base station respectively receive the signals forwarded by the relay node, and disturbing signals in respective received signals are respectively eliminated so as to perform demodulation. Compared with the existing technical method of time division multiplexing bidirectional relay physical layer network coding, the invention greatly reduces the time slot required for completing uplink / downlink communication transmission, supports the communication of more users and improves the outage probability of each user and the ergodic capacity of the overall system.

A radio communication system comprises: a radio receiver including an interference canceller configured to generate a replica of a received signal and remove an interference signal from the received signal, and a frequency offset estimator configured to estimate a carrier frequency offset between a carrier frequency of the interference signal and a carrier frequency of a desired signal included in the received signal; and a radio transmitter including a frequency controller configured to adjust a carrier frequency of a transmitted desired signal to the carrier frequency of the interference signal based on the carrier frequency offset received from the radio receiver.

A wireless fading-channel demodulator using adaptive sub-array group antennas to combine beamforming and diversity gain, a signal receiving system and method for mobile communications using the wireless fading-channel demodulator. The wireless fading-channel demodulator eliminates interference signals arriving at different directions-of-arrival (DOAs) from undesired mobile stations (users) and provides strong immunity to fading. A high signal and interference-to-noise ratio SINR can be achieved even when the number of antennas is smaller than the number of mobile stations (users). The wireless fading channel modulator can be applied to any system receiving mobile communication information, such as a base station, a mobile station, etc.

In a multilayered optical thin-film filter having multiple quarter wavelength thick optical thin films with different refractive indices, the filter includes a plurality of unit cavities that are stacked multiple times via a connection layer, each unit cavity including a first reflector layer, a spacer layer in contact with the first reflector layer, and a second reflector layer in contact with the spacer layer. The first reflector layer is a layered body and the second reflector layer is a layered body. The spacer layer is a multilayered optical thin film with a high refractive index obtained by layering even number of films, or is composed of a multilayered optical thin film with a low refractive index. The connection layer is a multilayered optical thin film with a low refractive index obtained by layering odd number of films.

The invention relates to a device for measuring the depth of a weld seam in real time in the case of the welding or joining of a workpiece by means of radiation, comprising: a measurement light source, the light of which is coupled into a reference arm (18) and into a measurement arm (19) by a beam splitter (17); a collimator module (21), which has at least one collimating lens (29) for collimating a measurement light beam (23), which is fed to the collimator module (21) by means of an optical waveguide (20) in the measurement arm (19), and for imaging the measurement light beam (23) reflected back by a workpiece to be processed onto an outlet / inlet surface (26) of the optical waveguide (20); an incoupling element (24) for coupling the measurement light beam (23) into the beam path of a processing beam (10); a focusing lens (25) for jointly focusing the measurement light beam (23) and the processing beam (10) onto the workpiece and for collimating the measurement light beam (23) reflected back; and an evaluating unit (15) for determining the depth of a weld seam, into which evaluating unit the measurement light reflected back by the workpiece is directed together with the superposed, reflected-back light from the reference arm (18). The collimator module (21) comprises means for setting the axial focus position of the measurement light beam (23), means for setting the lateral focus position of the measurement light beam (23), and a field lens (28), which is arranged between the outlet / inlet surface (26) of the optical waveguide (20) and the collimating lens (29) and which defines the beam expansion of the measurement light beam (23) and thus the focus diameter of the measurement light beam (23).

The invention mainly belongs to the technical field of satellite navigation, and particularly relates to a method for realizing satellite navigation anti-interference and attitude measurement based onan array antenna. The attitude measurement method comprises the following steps: a satellite navigation array antenna is arranged to receive a satellite navigation radio frequency signal; each antenna array element in the satellite navigation array antenna corresponds to one radio frequency front end channel, the radio frequency front-end channel processes the radio-frequency signals received bythe antenna array element to generate a digital baseband signal; an anti-interference processing module is used for carrying out self-adaptive array signal processing on the digital baseband signals,and the interference is eliminated to form a beam null notch and interference is eliminated; the carrier phase position of the satellite navigation signal received by each antenna array element is recovered, and the attitude of the array antenna is calculated through an array antenna attitude measurement model. According to the method, the array antenna is used for carrying out anti-interference processing and attitude measurement operation on the received signals, and the satellite navigation attitude measurement function can be realized in an interference environment.

A mobile phone 1 receives a home cell signal sent from a base station B1 and a foreign cell signal sent from a base station B2 or from a mobile phone 21 in a foreign cell A2. The mobile phone 1 receives spreading codes C2-C4 sent from the base station B1, as home cell codes. The mobile phone 1 detects the interference between the home cell signal and the foreign cell signal. When the interference is detected, the mobile phone 1 receives a spreading code C1 sent from the base station B2 or from the mobile phone 21, as a foreign cell code. The mobile phone 1 cancels an interference signal by joint detection, using the home cell codes and the foreign cell code.

The invention discloses an interference elimination method based on effective channel parameter semi-orthogonal, comprising the steps of: calculating an effective receiving channel parameter of a user side and regarding the parameter as the basis for the selection of a semi-orthogonal user by a base station according to effective channels and cross channel parameters fed back by a user. After selecting the semi-orthogonal user of the effective receiving channel parameter by the base station, double-layer pre-coding vector design is carried out by the base station so as to eliminate the interference among cells and in the cells. Through the interference elimination method based on effective channel parameter semi-orthogonal, the average user capacity can be improved and the computation time complexity for the selection of the semi-orthogonal user is greatly reduced.

The parallel-coupled-resonator coupled line filter with open-and-short end, comprises an input port for receiving an input signal; a bent first resonator and a bent third resonator where their both ends are open circuited; a second resonator whose both ends are shorted to ground; and an output port for outputting signal. Wherein, designing cross coupling between the third resonator and the first resonator to obtain a steep frequency response and reduce the interference of the image signal.

The invention discloses an electrochemical analyte sensing system capable of self-correcting interference signals. The system comprises a sensor, a direct-current voltage power supply component, a current measuring component, an alternating-current impedance measuring component, a circuit changeover switch, a controller, a data processing and communication component and a power supply. A blank electrode with the size the same as that of a working electrode is added, and the interference signals are eliminated by means of signal subtraction. The alternating-current impedance measuring component is added, and the working state of the sensor is judged according to system impedance outputted by the alternating-current impedance measuring component. The influence of interferents and measuring environment change on analyte signal generation can be effectively eliminated, and effectiveness and accuracy of measuring signals are ensured by the sensor during working.

The embodiment of the invention discloses an image pickup sound extracting method and device. The method comprises the following steps of: obtaining an initial sound signal vF(t)obtained by a first microphone according to a formula: vF(t)=s F(t)+beta BsB(t)+n(t), and obtaining an initial sound signal vB(t) according to the formula: vB(t)=s B(t)+ beta FsF(t)+n(t), wherein sF(t) is the initial sound signal of a pickup target, beta B is an attenuation coefficient for explaining the sound to the first microphone, beta F is the attenuation coefficient for explaining the pickup target sound to the second microphone, n(t) is a noise signal; obtaining a final sound signal SF(t) obtained by the first microphone according to the formula: SF(t)=vF(t)-beta BvB(t), and obtaining the final sound signal SB(t) obtained by the second microphone according to the formula: SB(t)=vB(t)- beta FvF(t); obtaining a sound signal s'F(t) and an explanation sound signal sB'(t) of the pickup target by carrying out automatic gain adjustment to the SF(t) and the SB(t). The image pickup sound extracting method and the image pickup sound extracting device disclosed by the invention are applicable to distinguishing and adjusting sounds of different targets during an image pickup process.

A method for selecting wire of single phase earthing fault in small current earthing system measures zero sequence current increment of each circuit at bus side before and after fault and selects wire according to principle that zero sequence current increment of fault circuit is equal to negative value of nonfault circuit zero sequence current increment sum.

The invention discloses a method for measuring trap parameters in an XLPE cable based on a polarizing-depolarizing current test. In the method, firstly, detrapping current is extracted from the polarizing current, then, staged linear fitting is executed for the detrapping current, moreover, fitting parameters A<m>. Tau<m> and Tau<m> are used to represent trap parameters, such as trap charge density and trap depth, in the XLPE current, and consequently, trap charge density and charge accumulation conditions of the XLPE cable insulation are reflected. The method provided by the invention can guarantee accuracy and effectiveness of trap parameter measurement; moreover, in the method, staged linear fitting is executed for the detrapping current, fitting effect is excellent, various interference signals are eliminated, thus, accuracy of trap parameter measurement is improved further; moreover, the method is based on a PDC nondestructive test method, has no high requirement on test apparatuses, is simple to operate, has no damage to cable insulation, has very high practicability in the aspect of acquiring XLPE cable trap characteristics, and is suitable for being generalized and used insuch field.

The invention provides a power transformer noise control method based on an inverse control technology. The power transformer noise control method based on the inverse control technology comprises the steps that noise signals generated by a noise source of a power transformer are collected through a primary sensor and are regarded as reference signals of a control system; error signals generated through the superposition of noise reduction signals and the noise signals are collected through an error sensor; the control system establishes a secondary sound channel model for a secondary sound channel through an adaptive modeler according to the error signals, simulates the process that the noise reduction signals generated by a secondary noise reduction source are transmitted in space and obtains sound signals of a simulation secondary sound source; the control system carries out inverse modeling on the secondary sound channel through the adaptive modeler according to the error signals, and the secondary sound channel is connected with the secondary sound channel model in series in the control system; the sound signals equal to the reference signals in amplitude are obtained through calculation, and inverting processing is carried out on the sound signals to obtain control signals controlling the secondary noise reduction source; the noise reduction signals are output according to the control signals. The power transformer noise control method based on the inverse control technology can effectively control low-frequency noise of power transformers.

The invention provides an ignition control device, which comprises a bridge rectifier circuit, a power management circuit, a logic control circuit, a clock circuit and an ignition control circuit, wherein, the ignition control circuit comprises a charge control switch, an RC low pass filter, a safety discharge switch and an ignition control switch; and the RC low pass filter comprises a current-limiting resistor and a storage capacitor. The invention further provides the control flow of the ignition control device, which comprises an initialization control flow, an ignition control flow and other steps, wherein, the ignition control flow is carried out according to the following steps: the logic control circuit transmits a control signal, disconnects the safety discharge switch and closes the charge control switch; the logic control circuit starts electronic delay after reaching the desired charging time; and the logic control circuit transmits the control signal and closes the ignition control switch after reaching the desired delay time. Therefore, the energy for initiation can be controlled safely and reliably, thereby improving the ignition safety.

Embodiments of the present disclosure provide a force detection apparatus and method, a touch device and an electronic terminal. The apparatus includes: a first detection capacitor, and a second detection capacitor configured to perform differential processing for a capacitance of the first detection capacitor to cancel an interference signal; wherein the first detection capacitor includes a forcedetection electrode, and the second detection capacitor includes a reference detection electrode, the force detection electrode and the reference detection electrode being arranged within a surface,such that the first detection capacitor and the second detection capacitor are simultaneously coupled to the interference signal causing interference to force detection, and differential processing isperformed for capacitances of the first detection capacitor and the second detection capacitor. In this way, the interference signal, for example, which caused by a display device, is canceled, and sensitivity of force detection is enhanced while temperature drift is inhibited.

The invention discloses a radioactive spectrum identification method comprising the following steps of: carrying out filtration, dimension reduction and classified treatment on measured energy spectrum in radioactive measurement, extracting feature vectors of energy spectrums as samples, and obtaining the GMMs (Gaussian Mixture Models) of all kinds of feature vectors through training; solving the feature vectors of energy spectrums to be identified and solving the class conditional probability density of the feature vectors according to the GMMs; and then carrying out decision classification to finish energy spectrum identification. The radioactive spectrum identification method has high energy spectrum identification accuracy rate and is an effective method for radioactive spectrum identification.

The embodiment of the specification discloses a voice signal processing method, a sound acquisition device and electronic equipment. The scheme is that the voice signal processing method comprises thesteps of: acquiring a first voice signal acquired by a first microphone array and a second voice signal acquired by a second microphone array, wherein the first microphone array and the second microphone array are consistent in target direction, each microphone in the second microphone array is the same in orientation, at least one microphone in the first microphone array is different from the microphones in the second microphone array in orientation; carrying out filtering processing on the first voice signal to obtain a noise reduction gain in the target direction; and according to the noise reduction gain in the target direction, carrying out filtering processing on the second voice signal to obtain an output signal in the target direction.

A received signal whose frequency band is spread in a spread spectrum system is subjected to fast Fourier transform processing to be transformed to a frequency spectrum, based on this frequency spectrum, a narrow-band interference signal is detected and eliminated, and then by subjecting the received signal to inverse FFT, the received signal from which the interference signal is eliminated is obtained, whereby the narrow-band interference signal can be eliminated from the received signal by a simple configuration.