Wind profile radar non-phase parameter radio interference inhibition method

A wind profiler radar, radio interference technology, applied in the direction of radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc. Weak power, etc.

Inactive Publication Date: 2008-08-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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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

Method used

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  • Wind profile radar non-phase parameter radio interference inhibition method
  • Wind profile radar non-phase parameter radio interference inhibition method
  • Wind profile radar non-phase parameter radio interference inhibition method

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Embodiment Construction

[0034] figure 1 It is the processing flow of the method for suppressing non-coherent radio interference by the combined pseudo-random coding of fully coherent inter-vein and intra-vein, figure 2 It is a block diagram of the implementation principle of fully coherent pulse-to-pulse and intra-pulse joint pseudo-random coding bi-phase modulation to suppress non-coherent radio interference. The pseudo-random code generator (generated by linear logic shift register) in the wind profile radar monitoring combination outputs a pseudo-random code sequence, which is then sent to the radio frequency modulator, transmitter and signal processor. The inter-pulse pseudo-random code that is completely synchronized with the transmitted modulation pulse is decoded for the first time, and the output result is decoded for the second time with the intra-pulse pseudo-random codebook. After the above two decoding operations, the non-corresponding Refer to the processing result of radio wave interf...

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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 completed and 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 interpulse pseudo 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 ...

Claims

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Application Information

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IPC IPC(8): G01S7/36G01S13/95
CPCY02A90/10
Inventor 卜祥元王勇王爱华安建平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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