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Research and Implementation of Digital Channelized Reconnaissance Receivers

Author: HuJianBo
Tutor: ZhangChunJie
School: Harbin Engineering University
Course: Communication and Information System
Keywords: Digital channelized receiver Polyphase filter CORDIC FPGA
CLC: TN851
Type: Master's thesis
Year: 2011
Downloads: 50
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Abstract


Modern electronic battlefield electromagnetic environment has become increasingly complex and volatile, the main features of the electronic warfare signal bandwidth , pending signals intensive , passive reconnaissance and receive the signal of non - cooperation , and therefore a higher demand for electronic surveillance equipment . Traditional electronic warfare reconnaissance receiver often use the analog receiver to achieve its parameters temperature drift linear differential circuit , can easily lead to the loss of fine information of the signal frequency and phase , thus making the development of the digital receiver to the development of new types of electronic surveillance inevitable trend . With the emergence of new radar equipment , radar signal form diversified requirements , in order to adapt to the complex signal environment , electronic warfare receiver with wide instantaneous bandwidth , high sensitivity , large dynamic range , able to intercept the signals arrive at the same time , as well as the ability to have real-time signal processing . In this new context , the digital channelized receiver has become the main direction of development of the of broadband electronic reconnaissance receiver . This paper first introduces application background and significance of the subject , the development in the world and the digital receiver basic theory , including signal sampling theory , the theory of multi-rate signal processing and digital down conversion principle . A real signal less aliasing without blind spots channelized divided on the basis of these theoretical studies , and the derivation of the mathematical model of the real signal channelized receiver . By MATLAB simulation results proved the correctness of the mathematical model . Channelization subsequent signal processing process , the phase difference of a first-order sub- algorithm to achieve a measurement of the instantaneous frequency of , the frequency measurement accuracy , based on the coordinated rotation digital computer (CORDIC) algorithm to achieve the extraction of the signal envelope and the instantaneous phase , and using discussed . Production of the high-speed National Semiconductor ADC08D1000 and ALTERA FPGA chip production design in the realization of the system , according to the technical requirements for digital channelized receiver , and a digital channelized receiver . Detailed tests on the hardware platform of the system features and technical indicators , the test results are analyzed and presented some improvements .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Receiver equipment, radio Radio > Receiver: the form of points
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