54results about How to "Increase receive gain" patented technology

The invention discloses a Ka-waveband TOPS InSAR system and a working method thereof. The system comprises a transmitting antenna on a satellite and first and second receiving antennas positioned at the two sides of the transmitting antenna on the same satellite, and the antennas work in the Ka waveband.

The invention provides an elastic wave through-the-earth signal diversity reception method, and relates to diversity reception technology applied in the fields of exploration and through-the-earth communication. In the method, signals dispersed at each frequency point and in each transmission mode are organically fused together at an earth channel receiving end by adopting a way of multi-mode reception and multi-frequency point reception diversity, so the signal-to-noise (SNIR) of the receiving end is improved. When elastic waves are transmitted in an earth medium, the transmission mode of the elastic waves is changed, while frequency is shifted under the influence of the piezoelectric effect, waveguiding effect and resonant cavity effect of the earth medium. The method provided by the invention has the advantages of improving reception gain by collecting signal energy dispersed in each mode and at each frequency point, and suppressing the attenuation of the elastic waves in the earth medium by the diversity combination of multi-mode and multi-frequency information to finally fulfill the aim of improving the detection performance of a receiver.

The invention claims a method for synchronously sending same MBMS service data by a wireless network controller, which can send same MBMS service data among subdistricts of different lower-layer network elements. The method comprises the following steps of carrying out radio link control layer RLC protocol processing to an MBMS service data packet by an upper layer network element, sending the radio link control layer protocol data unit RLC PDU obtained after processing to one or more lower layer network elements, carrying time-stamp information in the network message loaded with the RLC PDU; after receiving the network message, determining the starting time for sending the MBMS service data loaded by the RLC PDU at a radio interface according to the carried time-stamp information therein by the lower layer network elements. The method solves the problem of synchronously sending same MBMS service data, improves receiving gain of the MBMS service data by the terminal and avoids same frequency interference of the MBMS service signals among the subdistricts of different lower layer network elements.

The invention discloses a drivepipe local discharge electrified detection device based on a directional antenna array. An electromagnetic wave signal radiated by local discharge is detected by virtue of the directional antenna array, and then is converted into a voltage signal so as to be output; a signal conditioner is used for receiving the voltage signal output by the directional antenna array, eliminating a received electromagnetic wave interference signal, amplifying the voltage signal and improving the signal-to-noise ratio; a high-speed signal collector is used for performing analog-to-digital conversion on the signal output by the signal conditioner and realizing the collection, storage and display of the digital signal. According to the device disclosed by the invention, a detection antenna is distributed in a safe region on the ground, so that the safety and reliability are high, and meanwhile, the sensor installation problem in the prior art is solved; the directional antenna array is adopted for detecting a drivepipe local discharge signal, and is combined with the signal conditioner, so that the drivepipe local discharge signal receiving gain is improved, meanwhile the drivepipe peripheral electromagnetic interference receiving gain is reduced, and strong interference on drivepipe local discharge detection due to a severe electromagnetic environment of transformer substation is overcome.

The invention relates to the technical field of electronic information, specifically an anti-interference method and device for a navigation receiver through employing inertial navigation equipment under the condition of cold start. The method comprises the steps: calculating a guide vector between a satellite and an antenna array according to information provided by inertial navigation, adjusting the weight of an array and forming a wave beam, and enabling the wave beam to face the incoming direction of a satellite signal. The method is advantageous in that 1, the method can divide the direction of the wave beam in an adaptive manner; 2, the method controls the direction of the wave beam synthesized by a plurality of antennas through the position information obtained by the inertial navigation equipment, and achieves the effects of improving signal receiving gain, and weakening interference.

The invention relates to a system for realizing the television service via mobile terminal, which includes: a network service center of digital television broadcasting, a mobile television broadcasting-program distribution sell (MTB-PDS), a mobile video broadcasting-terrestrial transmission sell (MTB-TTX), a mobile video broadcasting-mobile station (MTB-MS). The transmission method shows as follow: the network serving center reuses different digital-programs as transport-streams to transmit to MTB-PDS, MTB-PDS converts the transport-streams into different programs and allocates them to different broadcast-streams to transmit to MTB-TTX, and MTB-TTX broadcasts the received different broadcast-streams through different sub-channels of empty broadcasting channels. The receiving method shows as follow: MTB-MS remains on the frequency point of the broadcasting carrier frequency of television service via mobile terminals, and the program data of the sub-channels of the empty broadcast channel can be received.

A combined space-time multi path searching method for fixed multi beam intelligent antenna and its device. It includes: the base band samples signal converting the received radio frequency signal to signal waiting to process; makes beam forming to the odd number or even numbered beam in the base sampled signal to form the beam signal; makes time delay power spectrum process to the odd number or even numbered beam to separately generate relevant time delay spectrum to each beam; adds energy gotten from all odd number or even numbered beam according to corresponding phase to get total energy corresponding to all phase; makes multi path location determine to the energy corresponding to each phase to get and outputs every multi path phase information; makes multi beam determine, according to each multi path phase information and the energy corresponded by deferent beam, confirms the numbers of the beam which the multi path is at; outputs the above beam's numbers and phase information. The invention saves N / 2 number of multi path searcher corresponding to original system.

The invention discloses an LTE terminal reception gain adjustment method. The invention discloses a LTE terminal reception gain adjustment method, comprising steps: a long terminal evolution technology (LTE) terminal receives time domain data of a plurality of small cells which is transmitted on a transmission block of a physical broadcasting channel PBCH, wherein PBCH transmission block comprises N sub-frames, each sub-frame can be divided into m time slots and each time slot comprises n orthogonal frequency division multiplexing symbols; Fourier transform is performed on the time domain data to obtain frequency domain data; frequency domain data power values corresponding to a plurality of cells and on any symbol among first K orthogonal frequency division multiplexing symbols; a power estimation value is obtained on the basis of the frequency domain data power values corresponding to the plurality of cells and on any symbol among the first K orthogonal frequency division multiplexing symbols; and a difference value between the power estimation value and a preset power value is calculated and regulation is performed on a received gain value according to the difference value.

The invention discloses an uplink data processing method, system and device and a storage medium, which are used for a distributed base station system, and the method comprises the following steps: taking physical random access signals corresponding to the same target user equipment as a target physical random access signal group based on a preset rule, and aiming at each target physical random access signal group, generating and sending a corresponding physical random access response signal, and obtaining a detection result of a physical random access channel corresponding to each signal source device in the target physical random access signal group based on the received physical random access signal, generating an uplink data processing strategy corresponding to the target physical random access signal group based on the detection result of the physical random access channel of each signal source device in the target physical random access signal group, so the problem of floor noise uplift in signal transmission and combination is improved, and the uplink data receiving gain is improved; therefore, the capacity of the whole distributed wireless communication system is improved.

The invention discloses a method used for covering tunnels in a TDD system, comprising the steps as follows: a plurality of signals output by a remote radio frequency unit RRU are calibrated; two signals are selected out of a plurality of calibrated signals; the two signals are respectively used for covering tunnels. Two or more signals are used for covering tunnels, therefore, the emission power of the downlink signal can be greatly improved, the receiving gain of the uplink signal can be greatly improved, thus improving the practical coverage distance and meeting the coverage requirement better. The invention also provides equipment which is used for covering the tunnels in the TDD system, and a system which is used for covering the tunnels in the TDD system.

An ultrasonic diagnostic apparatus is provided. The ultrasonic diagnostic apparatus includes an ultrasonic probe having plural ultrasonic transducers arranged in an elevation direction, a beamformer configured to form an ultrasonic reception beam by performing delay addition to an echo signal received by each of the ultrasonic transducers, and configured to form plural ultrasonic reception beams, each ultrasonic reception beam having a different width in the elevation direction, wherein the beamformer is configured to form the plural ultrasonic reception beams for one transmission / reception surface by adjusting a delay time in the delay addition, and a display control unit configured to display a synthetic image formed based upon the plural ultrasonic reception beams.

The embodiment of the invention discloses an antenna system, which comprises integrated transmitting / receiving active antennae, a radio frequency cable feed unit, power supply equipment and the like. By adoption of a space diversity active antenna system, an uplink receiving gain is improved in a space diversity receiving mode and further improved by active amplification of an uplink, so the uplink is greatly improved, the uplink and a downlink are balanced, realization of the performance of a base station is facilitated, the coverage range of the base station is expanded, and the system performance of the base station is improved. Moreover, by employing integrated design in which an active part is integrated with the antenna, the appearance of a space diversity active antenna is matched with that of the conventional passive antenna; and by employing a radio frequency cable feed technology, external connection of a power line is not required, so the antenna system is quite convenient for construction application.

The invention relates to a soft information merging method for PLC system frame loads, and belongs to the field of Internet of Things communication. The method comprises a diversity copy data merging method and specifically comprises the following steps of: firstly, carrying out Fourier transform on frame structure data received by a receiving end, taking out frame load data in the frame structure data, namely modulation data of a frame load, and demodulating the modulation data of the frame load to obtain soft bit information of the frame load; and then, calculating a variance value of each diversity copy of the frame load by adopting a variance calculation method, merging by adopting a principle that the larger the variance value of the diversity copy is, the smaller the diversity merging coefficient is in diversity merging, and carrying out channel decoding after frame load soft information is merged. According to the invention, the problem of diversity copying and merging of the receiving end of a low-voltage power line broadband carrier communication system can be solved, and the quality of diversity merging signals is improved.

The embodiment of the invention discloses an antenna system, which includes an integrated transceiver active antenna, a radio frequency cable feed unit, power supply equipment and the like. The space diversity active antenna system uses space diversity reception to increase the uplink reception gain, coupled with uplink active amplification, further improves the uplink reception, thereby greatly improving the uplink and making the uplink and downlink balance, It is beneficial to give full play to the performance of the base station, improve the coverage of the base station, and improve the performance of the base station system. Moreover, the space-diversity active antenna adopts an integrated design, integrating the active part into the antenna, which is consistent with the traditional passive antenna in appearance, and adopts the technology of RF cable feeding without external power lines, so it is suitable for construction applications. It's quite convenient.

The invention belongs to the technical field of communication signal modulation recognition in a multi-sensor non-cooperative reception environment and particularly relates to a maximum likelihood modulation recognition method based on feature vectors in multi-sensor reception. The method comprises the following steps that step 1.each sensor sub-node estimates a signal-to-noise ratio, extracts modulation recognition features and configures recognition feature vectors according to respective receiving signals; step 2.a likelihood function based on the recognition feature vectors is configured on a major node; and step 3.maximum likelihood judgement is carried out in a to-be-recognized signal modulation type set at the major node according to the configured likelihood function, so that a recognition result is obtained. The method adopts the multi-sensor reception signals, extracts the recognition feature vectors and designs a classifier, so that the problems of accuracy and reliability of the communication signal modulation recognition under the band conditions in a mobile communication, short-wave communication or underwater acoustic communication process are solved.

The present invention provides an electronic device and a control method for the electronic device. The electronic device includes: an electronic device body and a telescopic structure disposed inside the electronic device body; a radio frequency transceiver; a first antenna disposed on the telescopic structure, and a radio frequency transceiver A first transmission and reception path is formed between the first antenna; a first switch, the first switch is set in the first transmission and reception path; wherein, when the telescopic structure is moved out of the electronic device body, the first switch turns on the first transmission Receiving path: when the retractable structure moves into the body of the electronic device, the first switch disconnects the first transmitting and receiving path. The present invention can reduce the difficulty of antenna design, and the first antenna has different working states when the telescopic structure is in different positions, and can reduce the receiving interference of the first antenna, thereby improving the receiving gain of the antenna and improving the efficiency of the antenna for transmitting signals. Make it better to receive the signal.

The invention provides an elastic wave through-the-earth signal diversity reception method, and relates to diversity reception technology applied in the fields of exploration and through-the-earth communication. In the method, signals dispersed at each frequency point and in each transmission mode are organically fused together at an earth channel receiving end by adopting a way of multi-mode reception and multi-frequency point reception diversity, so the signal-to-noise (SNIR) of the receiving end is improved. When elastic waves are transmitted in an earth medium, the transmission mode of the elastic waves is changed, while frequency is shifted under the influence of the piezoelectric effect, waveguiding effect and resonant cavity effect of the earth medium. The method provided by the invention has the advantages of improving reception gain by collecting signal energy dispersed in each mode and at each frequency point, and suppressing the attenuation of the elastic waves in the earthmedium by the diversity combination of multi-mode and multi-frequency information to finally fulfill the aim of improving the detection performance of a receiver.

The present invention provides a satellite communication signal processing method, device, electronic equipment and medium. The method applied to ground terminals includes: receiving satellite pilot signals, extracting uplink working frequency bands; Frequency hopping uplink service signal; send frequency hopping uplink service signal to the satellite terminal according to the uplink working frequency band, so that the satellite terminal can de-hop the frequency hopping uplink service signal according to the frequency hopping pattern of the satellite terminal, obtain the de-hopping signal and send it to the gateway The restored local information decoded by the station is used as a signal processing result; the frequency hopping pattern of the ground terminal corresponds to the frequency hopping pattern of the satellite terminal. The present invention is applicable to the multi-satellite cooperative emergency communication system, and can increase the receiving gain and improve the reliability of the uplink during the communication process, especially the communication process under harsh conditions, and at the same time alleviate the terminal communication capability requirements and load storage pressure, and reduce the Hardware resource consumption.