Wind profile radar non-phase parameter radio interference inhibition method

Abstract

The invention discloses a non-coherent radio interference suppression method of a wind profile radar, belonging to the signal processing and detection technical field. The method comprises the following steps: an interpulse pseudo random sequence and an intrapulse pseudo random sequence are generated at a transmitting end; coding processing is completed; then, modulation transmitting is completedand both pseudo random sequences are stored in a received signal processor; finally, receiving is completed at a receiving end and two times of decoding processing of the received signal is completed; thus, the processing procedure of the method is completed. The primary decoding operation of the received signal of a wind profile radar processed by the method is carried out through the interpulsepseudo random sequence synchronical to a transmitting modulation pulse, thereby restoring coherent wind measurement signal and converting non-coherent radio interference into white noise so as to reach the effect of reducing the power spectrum of radio interference signal; then, according to an intrapulse pseudo random codebook sequence, secondary decoding operation is carried out to reach the effect of increasing the power of wind signal; moreover, the interference suppression effect of the method is about (10log L)dB and the power of wind signal is increased about (20log P)dB.

Description

technical field [0001] The invention relates to a radio interference suppression method, in particular to a wind profile radar non-coherent radio interference suppression method, which belongs to the technical field of signal processing and detection. Background technique [0002] Wind profiler radar is an all-weather Doppler remote sensing device that continuously observes the distribution of atmospheric wind direction and speed with height. It achieves the purpose of wind measurement by detecting the weak signal reflected by atmospheric turbulence. The research on this technology began in the United States in the early 1980s. Due to its high real-time and high accuracy of wind measurement, it is one of the key technologies for small and medium-scale atmospheric detection. In recent years, wind profiler radar has become more and more popular in various countries. Meteorology, environmental protection, military and other relevant departments pay attention to it, and relevant ...

AI Technical Summary

Problems solved by technology

Since it is relatively close to the operating frequency band of equipment such as broadcasting and communication, and the power of the wind profiler radar echo signal is weak (even less than -140dBm), it is susceptible to radio wave interference

At present, wind profiler radar mainly adopts classical signal processing techniques, such as pulse compression coding, DC removal, spectrum accumulation, spectrum cancellation, etc. Although it has a certain suppression effect on active interference, the signal-to-interference ratio has little improvement and the effect is not obvious

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