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Research on Identifying Techniques to Pulse-Doppler Radar System

Author: ChenGenHua
Tutor: YangShaoQuan
School: Xi'an University of Electronic Science and Technology
Course: Circuits and Systems
Keywords: Pulse Doppler radar Coherent sexual Pulse modulation Specific emitter identification PRI precise analysis
CLC: TN957.51
Type: Master's thesis
Year: 2005
Downloads: 591
Quote: 0
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Abstract


PD radar is a new radar system , the signal is very complex , and loading the weapon system radars generally have a high threat rates . Early emitter identification methods are on the level of the general parameters identification , such as carrier frequency , pulse width, repetition rate and so on. The use of early identification method to identify the PD radar , electronic warfare will not be able to meet the real-time and high accuracy requirements. This paper first starting PD radar works are discussed in detail PD radar signal characteristics , mainly coherent resistance, pulse modulation characteristics and repetition frequency varied properties. Characteristics for different characteristic parameters given a specific extraction method . Coherent analysis of the time domain is mainly self-correlation detection method , combined with an analysis of the simulation method is practical. Pulse modulation characteristics used in the time-frequency analysis method and image processing method to analyze the chirp signal , using the relative phase of the non- fuzzy method to analyze the phase- encoded signal . In this paper, under the conditions used in the fuzzy DS evidence theory confidence level of each parameter are fused to determine the degree of confidence belonging PD radar . For multi- mode PD radar , in order to prevent a single unit PD radar detection errors for different operating modes for different sources of radiation , this article will assume Seaview system matching structures for PD radar multi- pattern recognition , which can effectively work with different mode PD radar detected as single radar . For the electronic environment has become increasingly complex , increasingly blurred radiation parameters , the existing emitter recognition systems have a certain ambiguity. Therefore made specific emitter recognition of the concept of specific emitter identification in a nutshell is specific hardware recognition. In this paper, using the pulse waveform rising and falling edges of the pulse dynamic clustering and sorting signals reach a specific identification of the radiation source , a special presentation of the PRI abroad based on accurate analysis of specific emitter recognition .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar equipment,radar > Radar receiving equipment > Radar signal detection and processing
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