35 results about "Broadband wireless communications" patented technology

The invention discloses a power adaptive digital pre-distortion method, system and device based on sparse GRU and a medium. The method comprises the steps that input and output signals under different powers are collected, a composite feature vector is constructed through amplitude normalization and phase alignment, and a pre-distortion training target is generated in combination with indirect learning; constructing a sparse GRU neural network, introducing L1 regularization constraint, and obtaining a sparse pre-distortion model through joint optimization of mean square error and sparse constraint; partial weight updating is realized based on power grading, and weight fusion output is carried out during power interval switching so as to complete power adaptive optimization; pruning and compressing the sparse GRU model and then deploying the sparse GRU model in a pre-distortion module to compensate the nonlinearity of the power amplifier; according to the method, the model complexity is reduced through rarefaction, the dynamic working condition stability is improved through a power adaptive mechanism, pruning compression adapts to low-power-consumption hardware, high precision, low complexity and adaptive capacity are considered, and the method is suitable for the low-power-consumption and high-performance requirements of a broadband wireless communication system.

The invention relates to a wireless data security access gateway with integrated broadband and narrowband, which comprises a broadband wireless communication module and a narrowband wireless communication module which are respectively and electrically connected with a main processor and are used for receiving data transmitted by a terminal; the main processor comprises a data processing unit which is used for capturing terminal data transmitted from the broadband wireless communication module and the narrowband wireless communication module, performing priority classification, analysis classification, protocol conversion and storage control on the data, and forwarding the data to the safety protection unit; the security protection unit is used for carrying out identity authentication, encryption and decryption control and integrity verification on the data; the intelligent routing unit is used for receiving the data transmitted from the safety protection unit and selecting an optimal transmission path for data transmission; the memory is used for storing a priority setting table, a protocol configuration file, an operation log and a transmission log; and the national secret chip is used for encrypting and decrypting the data when receiving the encryption and decryption control signal sent by the security protection unit.

A distributed multi-antenna collaborative phase stabilization device for future broadband wireless communication. The device includes a central station and various antenna terminals interconnected via optical fibers to form a linear communication system. The distributed multi-antenna reception signals are optically modulated at the antenna terminals into different wavelengths of optical signals, and then coupled into a single optical fiber using wavelength division multiplexing technology for transmission to the central station. At the central station, the optical signals are converted back into the original RF (radio frequency) signals through optoelectronic conversion.

The invention belongs to the technical field of antennas, and provides a broadband circularly polarized millimeter wave magnetoelectric dipole antenna which comprises an excitation port, a microstrip feeder line, a 0.127 mm thick dielectric plate, a bonding layer, a metal floor, a grounding copper column, a 1.575 mm thick dielectric plate, a radiation patch and a parasitic patch. According to the millimeter wave circularly polarized antenna disclosed by the invention, the circular arc-shaped patch and the rectangular patch are effectively overlapped, and the axial ratio bandwidths of the two antennas are combined, so that a new radiation patch is formed, the broadband is realized, the axial ratio of the designed antenna unit is increased from 29.72 GHz-33.19 GHz to 27.95 GHz-43.33 GHz on the premise that the existing radiation performance is not influenced, and the antenna unit has a wide application prospect. The frequency band range of the antenna impedance matching lower than-10dB is 23.8-61.6 GHz, and the impedance matching relative bandwidth reaches 88.5%; the range of the frequency band with the axial ratio lower than 3dB is 27.95-43.33 GHz, and the relative bandwidth of the axial ratio reaches 43.1%; the frequency band range of the 3dB gain is 25.09-42.09 GHz, the relative bandwidth of the 3dB gain reaches 50.6%, the maximum gain 9.6 dBic is achieved at the 34GHz, the performance is excellent in all aspects, and the requirement of a broadband wireless communication system can be met.

A land mobile radio (LMR) device may include wireless communications circuitry selectively operable over an LMR wireless communications network and a broadband (BB) wireless communications network. The LMR device may include a controller cooperating with the wireless communications circuitry to wirelessly communicate via one of the LMR wireless communications network and the BB wireless communications network based upon a Locator ID Separation Protocol (LISP).

The invention relates to the technical field of broadband wireless communication, and discloses a digital pre-distortion low-complexity design method of a power amplifier and related equipment, and the method comprises the steps: carrying out the data preprocessing of an original bit, obtaining an OFDM signal, and collecting an input signal and an output signal of the power amplifier based on the OFDM signal; based on the collected input signal and output signal, an improved Hammerstein model is adopted to construct a digital pre-distortion module, and a baseband signal after pre-distortion processing is obtained; based on a loop signal corresponding to the digital pre-distortion module, a loop delay estimation module combining eight-phase quantization with a synchronous header frame structure correlation algorithm is adopted for delay estimation and compensation, and the low-complexity design of digital pre-distortion is completed. According to the invention, the technical problems of more coefficients and high implementation complexity of a digital pre-distortion method model of an existing power amplifier are solved.

The present application belongs to the technical field of near-field wideband wireless communication, and particularly relates to a near-field analog frequency division multiplexing method based on beam oblique view extension. The method of the present application firstly models the signal model and the channel model of the near-field wideband multi-user OFDMA system, calculates the signal-to-noise ratio and the achievable rate of different users on each subcarrier, and maximizes the minimum achievable rate in all users under the single radio frequency chain hardware constraint by jointly optimizing the subcarrier allocation, the phase shifter phase, the true time delay parameter and the power allocation. The present application can utilize the parallel true time delay structure to generate frequency-dependent beam focusing, so that different subcarriers are focused to different near-field user positions, thereby overcoming the problems of beam focusing difficulty and user fairness deficiency in the single radio frequency chain near-field wideband multi-user system. The simulation results show that the proposed method can significantly improve the minimum user rate of the system, and the performance is better than that of other benchmark methods.

1. Name of the Design Product: Broadband Wireless Communication Device. 2. Use of the Design Product: Wireless communication terminal device for data conversion in mobile communication networks. 3. Design Feature of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Feature: Perspective view.

This invention relates to the field of wireless communication technology, specifically to a broadband balanced antenna feeding method based on a common-mode inductor. This method addresses the shortcomings of traditional balanced antenna feeding technologies, such as insufficient broadband adaptability and poor common-mode interference suppression. It employs a common-mode inductor to convert the single-ended RF signal of the coaxial cable into a differential balanced signal. The method sequentially performs calculations of the single-ended signal input value, measurement of the differential signal amplitude and phase difference, antenna feeding matching degree calculation, detection of coaxial cable outer wall current, and isolation rate calculation. Then, it integrates core parameters to generate feeding parameter calibration coefficients, adjusting the feeding signal output to obtain a stable broadband feeding value. This broadband balanced antenna feeding method based on a common-mode inductor can stably achieve single-ended to differential signal conversion over a wide frequency band, calibrate signal imbalance in real time, effectively suppress outer wall common-mode current interference, improve antenna feeding matching degree, and is suitable for broadband wireless communication, RF detection, and other system applications.

The invention relates to the technical field of wireless communication, and particularly discloses a multivariable joint optimization method in an RIS-assisted NOMA system. The method comprises the following steps: calculating theoretical propagation time delay of a reflection unit based on an incident angle, a reflection angle and a carrier frequency, and forming an accurate mapping relation with the carrier frequency; and selecting the result with the minimum difference value as the quantized actual time delay so as to realize the realizability of the continuous time delay. In a signal enhancement link, a maximum and minimum optimization model aiming at a reflection coefficient vector is established, and the performance of weak users in the system is ensured not to be limited by taking the minimum received signal strength maximization in all user signals as a target. And introducing a lower bound variable to adjust the constraint condition, and ensuring that the received signal strength of all users is not lower than the lower bound, thereby obtaining a global feasible solution. According to the method, joint optimization of the RIS time delay characteristic and NOMA signal distribution is achieved, the system capacity and the user fairness are both considered, and the method is suitable for design and deployment of a new generation of broadband wireless communication networks.

The invention discloses a high-flatness S-band filter based on an IPD process, and belongs to the technical field of microwave radio frequency integrated circuits. The filter comprises a substrate, and an input port, a first non-reflection resonator, a balanced resonator circuit, a band-pass filter circuit, a second non-reflection resonator and an output port which are located on the surface of the substrate. The equalization resonator circuit comprises a resistor, a first series resonator and a second series resonator; the band-pass filter circuit includes a third series resonator, a first parallel resonator, a fourth series resonator, and a second parallel resonator. According to the S-waveband band-pass filter, the balanced resonator circuit comprising the resistor is introduced to the input end, so that in-band fluctuation of the S-waveband band-pass filter is effectively compensated, and the in-band flatness is remarkably improved; and meanwhile, a multi-stage resonator structure in the band-pass filter circuit enhances the far-end suppression capability. The antenna is compact in structure and is suitable for broadband wireless communication and radar systems.

A system and method for an In-Band Rejection Filter (IBR) to filter varying combination of subchannels within a frequency band is provided. A bitmap configuration that specifies active subchannels within the frequency band can be used to determined filter coefficients for the IBR filter to reject interference from inactive subchannels while allowing signals from active subchannels to pass through.

A system and method for an In-Band Rejection Filter (IBR) to filter varying combination of subchannels within a frequency band is provided. A bitmap configuration that specifies active subchannels within the frequency band can be used to determined filter coefficients for the IBR filter to reject interference from inactive subchannels while allowing signals from active subchannels to pass through.

This invention relates to the field of millimeter-wave broadband wireless communication and is a channel estimation method for broadband millimeter-wave MIMO-OFDM systems based on beam tilt effect. It includes the following steps: (1) constructing a model of the MIMO-OFDM system; (2) modeling the channel estimation cost function, reformulating the system model for each subcarrier as a frequency-dependent sparse signal recovery problem; (3) updating the channel gain and noise variance; (4) updating the signal covariance matrix; (5) updating the angle estimate; and (6) reconstructing the channel for each subcarrier using a low-complexity algorithm to obtain high-precision channel estimation results. Compared to traditional schemes, this method achieves more accurate channel estimation results while maintaining acceptable computational complexity.

The present disclosure relates to an in-vehicle networking communication method. The method is applicable to a first device, and comprises: performing narrowband wireless communication with a second device on the basis of narrowband radio technology, so as to determine a communication time period for performing broadband wireless communication with the second device; on the basis of the UWB radio technology, performing broadband wireless communication with the second device within the communication time period by using address information of the second device, so as to determine whether the second device is within an allowed distance range of the first device; if it is determined that the second device is not within the allowed distance range of the first device, discarding data from or to the second device; and if it is determined that the second device has been within the allowed distance range of the first device, allowing the data from or to the second device. The present invention provides stable and secure wireless communication in a vehicle by means of combining narrowband wireless communication with broadband wireless communication, and supports in-vehicle wireless communication networking.

A method for operating a first communication node in a wireless communication network may comprise: a step for measuring the channel busy ratio of a first channel; a step for allowing fallback transmission of a first frame in the first channel on the basis of information about the channel busy ratio of the first channel; a step for performing a channel sensing operation in the first channel and a second channel; and a step for performing fallback transmission of the first frame in the first channel when, as a result of the channel sensing operation, the state of the first channel is an idle state and the state of the second channel is a busy state.

A land mobile radio (LMR) device may include wireless communications circuitry selectively operable over an LMR wireless communications network and a broadband (BB) wireless communications network. The LMR device may include a controller cooperating with the wireless communications circuitry to wirelessly communicate via one of the LMR wireless communications network and the BB wireless communications network based upon a Locator ID Separation Protocol (LISP).

An ultra-wideband (UWB) wireless communication system includes: a first wireless device; a second wireless device participating in a first ranging sequence with the first wireless device; and a transmission channel located between the first and second wireless devices for transmitting data of the first ranging sequence. At least one of the first wireless device or the second wireless device generates at least one channel impulse response (CIR) and determines whether the transmission channel includes a line-of-sight channel based on the at least one CIR. In response to determining that the transmission channel includes the line-of-sight channel, a dedicated processor reduces a current performance level of at least one of the first and second wireless devices during a second ranging sequence.

The invention discloses a frequency offset estimation and compensation method applied to 5G NR, and relates to the technical field of broadband wireless communication. According to the method, LS channel estimation is firstly carried out, then linear regression frequency offset estimation is carried out based on a DMRS pairing group to obtain a normalized frequency offset value, then frequency domain interpolation and frequency offset compensation of a channel are carried out, time domain interpolation is carried out based on the compensated channel estimation value, equalization is carried out, and finally frequency offset estimation is carried out on the equalized data. According to the method, the frequency offset estimation value is calculated through a method of pairing DMRS groups and performing linear regression, and compared with a method of accumulative summation and phase angle calculation, the frequency offset estimation accuracy is improved, and the anti-frequency offset performance of the system is improved; the frequency offset of the channel and the frequency offset of the balanced data are respectively compensated, channel estimation does not need to be carried out again after frequency offset compensation, the processing flow of a receiving end is simplified, the calculation complexity is reduced, and the processing efficiency of the receiving end is improved while the demodulation performance is ensured.

The application discloses a wireless network communication method and device based on preamble detection. The application relates to the technical field of wireless communication and aims to solve the problem of communication link interruption caused by interference on a main channel in a high-bandwidth wireless communication system. The method comprises the following steps: a receiving end synchronously performs physical layer preamble detection on a main channel and a dynamically configured sub-channel in parallel within a system bandwidth range; when the receiving end detects the physical layer preamble on any one of the main channel and the sub-channel, a complete signal receiving process is triggered; when the receiving end detects the physical layer preamble on the main channel and the sub-channel simultaneously, the receiving end selects the signal of one of the main channel and the sub-channel according to a preset arbitration strategy and then performs subsequent analysis. The application can break through the dependence on the main channel, support all types of interference scenes and has strong compatibility.

The application discloses a programmable intelligent metasurface design method for assisting broadband wireless communication, and comprises the following steps: designing an electromagnetic model of a broadband intelligent metasurface, outputting an amplitude correlation of the design model through electromagnetic simulation software, and fitting the amplitude correlation into a mathematical expression; setting a broadband wireless communication experimental prototype of an intelligent metasurface assisting single-in single-out orthogonal frequency division multiplexing based on the fitted amplitude correlation, and through joint optimization of power distribution of each subcarrier and beamforming of each RIS small element until convergence, the maximum average subcarrier rate of the system is obtained; and the performance of the algorithm is evaluated through setting different simulation indexes, and the influence of different factors on the transmission quality in the field test prototype is further evaluated by considering the simplified conditions of the field test.

The invention discloses a broadband analog active phased array receiving system and a received signal processing method thereof, the receiving system can eliminate ISI (International Standard Interference) among complex digital signals output by each downlink by accurately controlling the occurrence time difference of ADC (Analog to Digital Converter) sampling clocks of each downlink, and the processing precision of incoming wave signals is higher than that of the prior art; according to the received signal processing method, the phase of a radio frequency analog signal received by each antenna unit is controlled through a numerical control phase shifter, and the occurrence time difference of an intermediate frequency digital signal output by each ADC is controlled through a sampling clock, so that complex digital signals from a specified direction and output by each downlink can be subjected to equal-phase superposition; the calculation precision of the proposed algorithm is higher than that of an existing algorithm. The method is suitable for broadband wireless communication and broadband simulation active phased array radar receiving systems, and is also suitable for narrowband wireless communication and narrowband simulation active phased array radar receiving systems, the signal processing precision is higher, and the calculation precision of the algorithm is also higher.

The invention discloses a wireless network communication method and device based on lead code detection. The invention relates to the technical field of wireless communication, and aims to solve the problem of communication link interruption caused by interference of a main channel in a high-broadband wireless communication system. The method comprises the following steps: a receiving end monitors a main channel and a dynamically configured sub-channel in parallel within a system bandwidth range, and synchronously executes physical layer lead code detection on the main channel and the sub-channel; when a receiving end detects the physical layer lead code in any one of the main channel and the sub-channel, triggering a complete signal receiving process; and when a receiving end simultaneously detects the physical layer lead code in the main channel and the sub-channel, the receiving end selects a signal of one channel from the main channel and the sub-channel to perform subsequent analysis according to a preset arbitration strategy. The method can break through the dependence of a main channel, supports all types of interference scenes, and is high in compatibility.

The utility model discloses embodied in vehicle remote control technical field, disclose a kind of vehicle somatosensory remote control system and somatosensory remote controller. Vehicle somatosensory remote control system includes somatosensory remote controller and display screen, display screen is located in vehicle, somatosensory remote controller includes first casing, first casing is equipped with sequentially electrically connected ultra wide band wireless communication module, first microprocessor and first communication module, display screen includes second casing, second casing is equipped with sequentially electrically connected second communication module, second microprocessor and display drive circuit;Ultra wide band wireless communication module is used to measure the first motion data of somatosensory remote controller in the first somatosensory mode;Second microprocessor is used to convert the cursor movement vector of first motion data display screen;Display drive circuit is used for according to cursor movement vector drive cursor moves. By the above-mentioned mode, the utility model embodiment can realize vehicle somatosensory remote control, and it is convenient and accurate to control.

An ultra-wideband (UWB) wireless communication system includes a first wireless transceiver, which outputs a data unit with a first preamble code, the first preamble code including data for performing a time-of-flight distance measurement; a second wireless transceiver, which replaces the first preamble code of the data unit with a second preamble code to provide a performance level required for the time-of-flight distance measurement between the first and second wireless transceivers corresponding to the environment in which the second wireless transceiver is used; and a communication link between the first and second wireless transceivers, which transmits the data unit with the first preamble code from the first wireless transceiver to the second wireless transceiver, transmits the second preamble code from the second wireless transceiver to the first wireless transceiver, and exchanges subsequent electronic communications between the first and second wireless transceivers using the second preamble code.

An operating method of a communication node in a wireless communication network includes: performing a first monitoring operation on a first link and a second link during a preset period; performing a first random backoff operation in the first link for a first random backoff period, if the first link and the second link are in an idle state according to the first monitoring operation; performing, in the second link, a second random backoff operation for a second random backoff period which is different from the first random backoff period in length; and transmitting a frame at a same point in time in the first link and the second link, if the first link is in the idle state according to the first random backoff operation, and if the state of the second link is an idle state according to execution of the second random backoff operation.

The present invention belongs to the field of antenna technology and provides a broadband circularly polarized millimeter-wave magnetoelectric dipole antenna, comprising an excitation port, a microstrip feed line, a 0.127 mm thick dielectric plate, an adhesive layer, a metal floor, a grounding copper column, a 1.575 mm thick dielectric plate, a radiation patch, and a parasitic patch. The millimeter-wave circularly polarized antenna of the present invention effectively superimposes a circular arc patch and a rectangular patch, combining the axial ratio bandwidth of the two antennas to form a new radiation patch, thereby achieving a wide bandwidth. Without affecting the existing radiation performance, the axial ratio of the designed antenna unit is increased from 29.72GHz to 33.19GHz to 27.95GHz to 43.33GHz. The frequency band in which the antenna impedance matching is less than 10dB is 23.8-61.6GHz, and the impedance matching relative bandwidth reaches 88.5%; the frequency band in which the axial ratio is less than 3dB is 27.95-43.33GHz, and the axial ratio relative bandwidth reaches 43.1%; the frequency band in which the 3dB gain is 25.09-42.09GHz, and the 3dB gain relative bandwidth reaches 50.6%. The maximum gain of 9.6dBic is achieved at 34GHz, and the performance is excellent in all aspects, which can meet the requirements of broadband wireless communication systems.

The invention discloses a broadband digital phased array receiving system and a received signal processing method thereof, the receiving system eliminates intersymbol interference between complex digital signals output by each downlink by accurately controlling the occurrence time difference of ADC sampling clocks of each downlink, and the processing precision of incoming wave signals is higher than that of the prior art; according to the received signal processing method, the appearance time difference of each ADC sampling clock is controlled, phase weighting is carried out on a complex digital signal output by each downlink by adopting a proposed received signal processing algorithm, the spatial phase difference generated by all frequency components of an incoming wave signal in a specified direction is eliminated, equal-phase superposition is realized, and the signal quality is improved. The calculation precision of the algorithm is higher than that of an existing algorithm. The method is suitable for broadband wireless communication and a broadband digital phased array radar receiving system, and is also suitable for narrowband wireless communication and a narrowband digital phased array radar receiving system, the signal processing precision is higher, and the calculation precision of the algorithm is also higher.

The invention relates to an electrically-controlled terahertz broadband large-phase-shift dynamic phase shifter based on a graphene-metal metasurface. The electrically-controlled terahertz broadband large-phase-shift dynamic phase shifter is composed of a high-resistance silicon substrate and a two-dimensional array on the high-resistance silicon substrate. Each array unit comprises three rectangular metal frames arranged side by side in the vertical direction, three graphene rectangular frames embedded in the rectangular metal frames, three sets of rectangular metal blocks and two rectangular metal blocks. Each group comprises four rectangular metal blocks which are arranged on the upper side and the lower side of the graphene rectangular frame in pairs. The two rectangular metal blocks are connected to the middles of the left side and the right side of the array unit respectively. The two extraction electrodes are located on the two sides of the two-dimensional array and connected with the positive electrode and the negative electrode of the direct-current power source respectively. When the bias voltage is increased, a terahertz wave absorption peak generated by the phase shifter gradually moves to low frequency, and broadband and large phase shift can be generated on the right side of the absorption peak. The electrically-controlled terahertz broadband large-phase-shift dynamic phase shifter is low in manufacturing cost and high in response speed, and has potential application value in the fields of terahertz phased array radars, broadband wireless communication and the like.

The invention relates to the field of wireless communication, and discloses a wide-narrow fusion sink node device and a position determination method thereof, the wide-narrow fusion sink node device comprises a narrow-band wireless communication module, a wide-band wireless communication module and a processing module, the narrow-band wireless communication module and the wide-band wireless communication module are respectively used for responding to a communication connection request, and the processing module is used for processing the communication connection request. Calling a corresponding protocol to establish communication connection with the narrowband equipment or the broadband equipment; the processing module is used for analyzing the narrowband data and the broadband data; the position determination method comprises the following steps of: constructing a position determination model of the wide-narrow fusion sink node equipment and solving to determine the number of the wide-narrow fusion sink node equipment arranged in the transformer substation and the position of each piece of wide-narrow fusion sink node equipment; the target of the model is that the number of narrow-band fusion aggregation node devices arranged on the premise of the maximum signal intensity sum function is minimum. Compared with the prior art, the method has the advantages of being compatible with broadband equipment and narrowband equipment and the like.