Spatial multiplexing TR equalizer design based on SIMO-UWB system

Abstract

The present invention relates to the technical field of wireless communications, in particular to a spatial multiplexing TR equalizer design based on a SIMO-UWB system, which comprises that a transmitting end transmits a detected signal; a receiving end estimates a channel type according to a channel state; according to different channel types, a channel transmission model is established, and channel parameters are estimated; the estimated channel parameters are fed back to the transmitting end and a time inversion mirror by the receiving end; the equalizer is designed by using the space-timefocusing characteristic of the time inversion technology; power control is carried out on the equalizer, and TR pre-filter cascade is used for the SIMO-UWB system. According to the equalizer design inthe invention, multi-code stream interference and inter-symbol interference in the SIMO-UWB system are reduced under the premise of ensuring normal communication of the system, the system complexityis reduced, and the performance of the system is greatly improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a design of a spatial multiplexing TR equalizer based on a SIMO-UWB system. Background technique [0002] With the rapid development of wireless communication technology, people have higher and higher requirements for high-speed data transmission within a short distance. The emergence of ultra-wideband (Ultra-Wide Band, UWB) technology provides a new technology for realizing ultra-wideband and ultra-high-speed data transmission within a short distance. UWB wireless communication system has a series of advantages such as high transmission rate, extremely wide bandwidth, high spectrum utilization rate, large system capacity, low transmission power, strong anti-interference performance, good confidentiality and simple system structure. However, in an extremely complex environment, problems such as multipath, scattering, reflection, and dispersion propagation in the c...

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Problems solved by technology

Nguyen considered the potential of the UWB system using the spatial multiplexing scheme, in which the transmitter uses TR technology, and proposed an algorithm for mitigating Multistream Interference (MSI), which significantly improved the bit error rate performance of the system, but ignored Intersymbol Interference (ISI), and the research is the case of MIMO single user

However, the introduction of TR technology into the SM-MIMO-UWB multi-user system has been studied, and it has been proved that TR can achieve the transmit diversity gain of the SM-MIMO-UWB system. However, when the number of transmit antennas is small, such as a single antenna, the received signal Not well focused in the spatio-temporal domain, the induced MSI and ISI seriously deteriorate the performance, so it is necessary to study the MSI and ISI techniques for mitigating SM-SIMO-UWB systems

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