A Signal Detection Method Based on Time Inversion and Space Diversity

Abstract

The present invention relates to the technical field of wireless communication, in particular to a signal detection method based on time inversion and space diversity. The method includes: setting a measurement performance threshold ρ at a transmitting end; a signal transmitting end sends a detection signal to the environment, and a receiving end receives the detection signal signal, and perform time inversion processing on the signal; send the time-reversed signal to the transmitter, and perform space diversity processing and NP criterion detection at the transmitter to obtain the detection probability P nD ; put P nD Compared with ρ; if P nD ≥ρ, get the test result; if P nD <ρ, then the time-reversed signal is subjected to time-reversal inversion processing, and then multiple inversion iterations are performed; the best detection result is finally obtained; the present invention uses time inversion and space diversity technology to detect signal performance before performing signal performance detection. Through processing, the energy of the target signal is enhanced, the number of received signals is increased, and a detection performance threshold is set at the same time, and better detection results are obtained through multiple time inversion processing.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a signal detection method based on time inversion and space diversity. Background technique [0002] In recent years, with the rapid development of wireless communication technology, radar has rapidly become a research focus of scholars from all over the world due to its advantages in target detection, anti-stealth, anti-detection and angle estimation. Wireless channels have unique spatial, time, and frequency domains. Diversity provides room for research. [0003] Some researchers use a single antenna in target detection, which has the characteristics of simple structure and easy implementation of algorithms. After some experts first proposed MIMO technology, MIMO wireless transmission technology has become an important technological breakthrough in the field of communication. It can increase the bandwidth without increasing the bandwidth. It is one of th...

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Problems solved by technology

[0004] At present, most of the research is on whether the target exists in the environment, but the research on the presence of weak and small moving targets in the environment is still insufficient. The performance decline is serious, so it is necessary to find a solution to improve the detection performance of detecting moving targets in the clutter environment

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