3 results about "Cooperative MIMO" patented technology

This invention discloses a satellite system suitable for multi-satellite cooperative MIMO applications, relating to the field of satellite communication technology. The system includes a decentralized constellation of multiple satellites and multiple user terminals. Each satellite in the decentralized constellation has independent signal processing capabilities. Each satellite includes a satellite-to-ground communication front-end, a signal processing unit, and an inter-satellite link terminal. The satellite-to-ground communication front-end is used for transmitting and receiving radio frequency signals with the user terminals. The signal processing unit is used for performing baseband signal processing and cooperative algorithm calculations. The inter-satellite link terminal is used to establish inter-satellite links to achieve data interaction with other satellites. The satellite platform provides attitude control, power supply, and spatiotemporal reference for the communication payload. This invention can eliminate the risk of single-point failure, improve system reliability and scalability, overcome transmission bottlenecks through inter-satellite laser links, and achieve broadband dispersion-free transmission using optical true time-delay technology, reducing satellite-to-ground round-trip latency.

This invention discloses a low-complexity distributed intelligent cooperative MIMO signal processing method and system, including: using a selected distributed unit to perform preset detection steps to obtain an estimated vector until the number of iterations reaches a preset iteration threshold L; sending the estimated vector after L iterations to a central processing unit, where it is quantized and estimated to obtain the final detection signal; the preset detection steps include: processing the received radio frequency signal to obtain a received signal vector; obtaining a local channel matrix based on a known pilot sequence; calculating a dynamic step size according to an adaptive dynamic step size adjustment strategy; updating the estimated vector using the received signal vector, the local channel matrix, the dynamic step size, and the estimated vector obtained after the previous iteration; selecting the next distributed unit using a multi-step conditional random sampling strategy; and sending the updated estimated vector to the selected next distributed unit. This invention reduces computational complexity and data interaction overhead while maintaining detection performance.

The application discloses a kind of HAPMIMO radar system diversity multiplexing gain analysis methods, comprising, the time sample observed to radar receiver is modeled, and the matching filter output of radar and communication transmitting signal is calculated according to time sample model;Matched filter output is obtained and rearranged data according to the correlation of target reflection coefficient;According to the matching filter output of radar subsystem receiver, the detection problem of target hypothesis with and without is constructed: the probability of missed detection of HAPMIMO radar subsystem is calculated;The diversity gain and multiplexing gain of radar are calculated, and the compromise relationship between the diversity gain and multiplexing gain of radar subsystem is obtained;The radar performance of cooperative MIMO radar communication integrated system is evaluated, and the maximum HAPMIMO communication diversity gain and HAPMIMO communication multiplexing gain are extracted from observation data.The radar performance of cooperative MIMO radar communication integrated system is evaluated, and the performance of radar system is improved in cooperation with MIMO communication system.