24 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.

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.

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.

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).

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.

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.

A system and method for PtMP wireless communication is provided. The PtMP wireless communication system can include a plurality of sectors each including a base station and a remote station(s). A total bandwidth the system can be determined based on a frequency range of a continuous band allocated to the system, or one or more PLMR channels when the system communicates over a Private Land Mobile Radio (PLMR) band having one or more channels. The total bandwidth can be portioned into subchannel(s), each having fixed subchannel bandwidth. Each sector can be assigned a subset of the plurality of subchannels. A subchannel bit map can be created and populated for the plurality of subchannels, specifying whether availability of each subchannel for the particular sector, and the base stations of each sector can communicate over the subchannels allocated to the at least one sector according to the respective populated subchannel bit map.

Methods and systems for channel measurement and prediction for wideband radio communication in wireless cellular systems are disclosed. An example method uses a channelizer with two interfaces connected to a wideband radio. The channelizer maps a wireless channel to a three-dimensional (3D) grid of voxels relative to wideband antennas coupled to the radio. A first interface receives a data stream from the wideband radio, while a second interface exchanges information with distributed unit (DU) functions of multiple network operators based on channel information from the voxel grid. The second interface de-channelizes the data stream into multiple channel streams, performs interference mitigation using the channel information, and provides the resulting interference-mitigated streams to corresponding DU functions of the multiple operators. An example system includes at least one processor configured to implement the above-described method.

The invention discloses a broadband digital phased array transmitting system and a transmitting signal processing method of the broadband digital phased array transmitting system, and the broadband digital phased array transmitting system accurately controls the occurrence time difference of each uplink DAC (Digital-to-Analog Converter) sampling clock. Digital signals carried by radio frequency signals radiated by all antenna units can simultaneously reach the front of far-field waves in a specified direction, and ISI can be more accurately eliminated compared with the prior art. According to the transmitting signal processing method, the occurrence time difference of an output baseband analog signal is controlled through a DAC sampling clock, and phase and amplitude weighting is performed on an input digital signal by adopting a proposed transmitting signal processing algorithm, so that equal-phase superposition of radio frequency signals radiated by all antenna units in front of a wave can be realized; an expected emission direction diagram is formed in the far field. The method is suitable for broadband wireless communication and a broadband digital phased array radar transmitting system, is also suitable for narrowband wireless communication and a narrowband digital phased array radar transmitting system, and is higher in signal processing precision.

The invention discloses a broadband simulation active phased array transmitting system and a transmitting signal processing method thereof, and the transmitting system can enable digital signals carried by radio frequency signals radiated by all antenna units to simultaneously reach the front of a far field wave in a specified direction by accurately controlling the occurrence time difference of each uplink DAC sampling clock. Compared with the prior art, the inter-symbol interference can be more accurately eliminated; according to the transmitting signal processing method, the occurrence time difference of an output baseband analog signal is controlled through a DAC sampling clock, and the phase of a radio frequency signal radiated by each antenna unit is controlled through a numerical control phase shifter, so that the radio frequency signals radiated by all the antenna units can realize equal-phase superposition in front of a wave; an expected emission direction diagram is formed in the far field. The method is suitable for broadband wireless communication and a broadband simulation active phased array radar transmitting system, is also suitable for narrowband wireless communication and a narrowband simulation active phased array radar transmitting system, and is higher in signal processing precision.

The application discloses a broadband wireless signal receiving method based on Rydberg atoms, and utilizes the interaction between multi-wavelength laser light fields and alkali metal energy levels to prepare Rydberg states. Through the accurate regulation of each frequency component of the multi-wavelength laser light fields, multiple Rydberg states with different response frequency bands exist in a single atomic medium. The response of different Rydberg states to different electromagnetic spectra is utilized to realize the frequency point identification and wide spectrum receiving of wireless signals. The application utilizes a single atomic medium and multiple pump wavelengths, and can effectively meet the application requirements of small-size long-wave antennas, same-structure cross-band broadband antennas and frequency-independent frequency modulation antennas, and provides a technical solution for upgrading the performance of a broadband wireless communication system.