7results about How to "Save Spectrum Resources" patented technology

The invention provides a communication and sensing integration method and system, electronic equipment and a storage medium. The method comprises the following steps: under the condition that a target object needs to be sensed, detecting the target object based on a passive detection technology to obtain a detection distance of the target object; and determining a target signal transmission mode adapted to the detection distance for sensing. And according to the target signal transmission mode, performing communication processing based on the target antenna in the communication time slot, and performing sensing processing based on the target antenna in the sensing time slot. Based on the scheme of the application, communication and sensing functions can be realized only by deploying a set of target antennas, so that spectrum and hardware resources are saved. In addition, in the sensing process, the signal transmission mode is adapted according to the detection distance of the target object determined by the passive detection technology, and the sensing precision for the target object can be improved. Meanwhile, the passive detection technology can assist in locking the target object in the sensing process, and the blind area possibly caused by switching the signal transmission mode of the target antenna is made up.

The invention relates to the technical field of submarine cable optical communication, in particular to an equipment multiple access and communication system and method and electronic equipment, and the system comprises a shore-based control module which is used for modulating multiple paths of shore-based terminal signals to downlink filling waves, encoding the modulated shore-based terminal signals, and sending the encoded shore-based terminal signals to a wireless communication module; synthesizing a downlink optical signal with other downlink carriers and outputting the downlink optical signal; the decoding module is also used for receiving the uplink optical signal fed back by the equipment control module and decoding the uplink optical signal by using a decoding sequence corresponding to each equipment terminal signal; the equipment control module is used for receiving the downlink optical signal and decoding the downlink optical signal by using a decoding sequence corresponding to each shore-based terminal signal; and the coding module is also used for modulating the multi-path equipment terminal signals to uplink filling waves, coding the signals and synthesizing the signals and other carriers into uplink optical signals. According to the method, random access of multiple terminal devices is achieved through coding, all terminal signals share the same wavelength, and spectrum resources are greatly saved.

The present invention provides a drone swarm networking measurement and control communication link and communication method, including airborne equipment and local equipment, the airborne equipment includes an airborne data terminal host and an omnidirectional antenna, and the local equipment includes a local data terminal host, a positioning module, and an omnidirectional and directional integrated antenna. The present invention adopts a time division multiple access, time division duplex system, a single-hop network, and a single-channel form of communication equipment. The measurement and control communication link and the inter-machine communication link work at the same frequency point, and the inter-machine communication, telemetry, remote control, and mission load information are compositely transmitted. In addition, the command and control node adopts a measurement and control communication form that combines directional antennas and omnidirectional antennas and works in time and stage, which simplifies the design of airborne communication equipment, realizes the remote transmission of telemetry, remote control, and mission load information, and maintains the inter-machine communication function.

The present invention discloses a method for optimizing perceptual performance based on MIMO-OFDM signals, comprising the following steps: at a transmitting end, using beamforming technology to point the MIMO-OFDM signal as a transmitting signal to the direction of a communication target; at a communication receiving end and a radar receiving end, respectively calculating the communication rate and the Cramer-Rao lower bound of the target parameter to be estimated; based on the communication rate and the Cramer-Rao lower bound, optimizing the vector composed of the subcarrier power of the transmitting signal to achieve the best compromise value between the communication performance and the perceptual performance, and applying the optimized subcarrier power vector to the transmitting signal of the transmitting end; at the radar receiving end, constructing the echo signal into a third-order tensor form according to a multidimensional signal processing model, decoupling the target parameter to be estimated based on CPD, and finally estimating the target parameter using the phase information of the factor matrix. The present invention ensures that the estimation accuracy can be further improved by using the optimized subcarrier power vector.

This invention discloses an electromagnetic spectrum allocation method for a drone swarm communication system, comprising the following steps: frequency allocation for the drone swarm communication network; time allocation for the drone swarm communication network; and power control for the drone swarm communication network. Addressing the prominent supply-demand imbalance of spectrum resources and the self-interference and mutual interference problems among drone swarms, this application proposes a spectrum allocation method for drone swarm communication networks based on non-cooperative game theory from three aspects: frequency domain, time domain, and energy domain (power domain), and conducts simulation analysis. Simulation results show that the proposed spectrum allocation method for drone swarm communication networks can effectively save spectrum resources, avoid self-interference and mutual interference among drone swarms, and has the advantages of strong anti-interference and low energy consumption.

The invention provides a channel searching method and device, electronic equipment, a storage medium and a program product. The method comprises the following steps: determining a non-idle state probability parameter and a detection duration increment function parameter of a to-be-searched channel; determining a non-idle state probability threshold parameter and a detection performance constraint parameter corresponding to the to-be-searched channel; based on the non-idle state probability parameter, the detection duration increment function parameter, the non-idle state probability threshold parameter and the detection performance constraint parameter, determining an average search duration corresponding to the to-be-searched channel; and based on the average search duration, performing channel search on the to-be-searched channel to obtain a channel search result. The channel search is carried out through the average search duration determined by the invention, the channel search duration is reduced, and spectrum resources are saved.

The invention provides a phase equalization method, device and equipment based on a satellite communication system, a medium and a product, which can be applied to the technical field of wireless communication. The method comprises the following steps: acquiring a time domain orthogonal frequency division multiplexing signal, and performing fast Fourier transform on the time domain orthogonal frequency division multiplexing signal to obtain a frequency domain symbol vector; based on a target initial phase difference determined according to the reference auxiliary synchronization frequency domain signal and a preset phase set, performing phase compensation on the time domain orthogonal frequency division multiplexing signal to obtain an intermediate time domain signal; based on a preset modulation pattern, performing demodulation and modulation processing on the intermediate time domain sequence to obtain a target reference auxiliary synchronization frequency domain symbol; comparing an auxiliary synchronization frequency domain symbol corresponding to the reference auxiliary synchronization frequency domain signal in the intermediate frequency domain signal with a target reference auxiliary synchronization frequency domain symbol to obtain a target phase difference; and performing phase compensation on the intermediate frequency domain signal based on the target phase difference to obtain a target frequency domain signal.