Narrowband interference suppression method, device and receiver in a spread spectrum communication system

Abstract

The invention discloses a narrowband interference suppression method, which comprises the following steps: carrying out packet caching processing to a received signal; causing each branch to pass through certain time delay to respectively obtain a receiving signal vector after time delay; calculating the autocorrelation P matrix of one branch; carrying out linear transformation to the receiving signal vector of each branch by the obtained autocorrelation P matrix to obtain a receiving signal vector of each branch after narrowband interference suppression; carrying out power normalization to the receiving signal vector of each branch after narrowband interference suppression to obtain a receiving signal vector after power regulation; recovering the receiving signal vector after power regulation into a normal receiving chip signal; carrying out time delay compensation to the signal which is recovered into the normal receiving chip in each branch; and adding signals to be recovered into one path of signal output. The invention also provides a narrowband interference suppression device and a receiver. In the narrowband interference suppression method, the receiving signal is received by time delay in different paths, the intensity of the receiving signal is effectively compensated, and the problem of bigger performance loss under low spreading gain in the improved code-aided technology can be solved.

Description

technical field [0001] The invention belongs to the field of wideband spread spectrum communication systems, in particular to a narrowband interference suppression method, device and receiver in the wideband spread spectrum communication system. Background technique [0002] Broadband spread spectrum communication system is one of the most widely used digital communication systems at the present stage, and has many advantages such as strong anti-multipath ability, low transmission power, and low interception rate. Narrowband interference (such as monotone interference, narrowband digital interference, etc.) figure 1 Shown is a schematic diagram of spectrum overlap between wideband spread spectrum communication system and narrowband system. figure 1 It can be seen from the figure that the frequency spectrum of the wideband signal and the narrowband signal overlap, so the systems will generate spectrum interference with each other. [0003] Broadband spread spectrum systems ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a narrowband interference suppression method, device and receiver in a wideband spread spectrum communication system. By splitting the received signal and delaying the reception, the strength of the received signal is effectively compensated, and the improved code-assisted technology is solved. Large performance loss at low spreading gains

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