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Digital Channelized Filter Algorithm and Technology of Realization Based on FPGA

Author: WuPan
Tutor: ZhaoGuoQing
School: Xi'an University of Electronic Science and Technology
Course: Circuits and Systems
Keywords: Digital channelized receiver Polyphase filter STFT FPGA
CLC: TN791
Type: Master's thesis
Year: 2010
Downloads: 221
Quote: 2
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Abstract


Electronic warfare signal environment and equip the most important feature is the wide frequency coverage , many kinds of signals to be processed , and often in a passive , non-matching receiver working conditions. Therefore, EW receiver generally have wide frequency coverage , high sensitivity, large dynamic range, and signal detection and simultaneously reach real-time processing capability. Digital channelized receiver as a digital receiver has a unique superior performance, high probability of intercept , high sensitivity, dynamic range, good frequency resolution and capable of simultaneously arriving signal processing capabilities , these are the last few years of domestic and international electronic warfare equipment and technology research hotspot. In this paper, based on polyphase filter digital channelized receiver channel technology carried out a systematic study , the first under the current status of the development of electronic warfare , radar signal analysis of wideband digital channelized receiver status of the main advantages of their development . Secondly study the basic theory of software radio , includes three receivers mathematical model , the signal sampling theorem and multi-rate signal processing , on the basis of in-depth study and derivation polyphase filter bank based digital channelized efficient structure . Then study on the realization of polyphase filter channel technology critical theory - short time Fourier transform (STFT), and describes the signal through the channel of the subsequent signal processing technology, and processing of the channel part of the simulation, experimental results verify the correctness of the model and can be realized . Finally studied the digital channelized FPGA, given the system 's overall design scheme and each key module design . Including: channel sort the data processing module , FIFO concrete realization of the channel that is part of the core processing module of the FFT , channel detection FPGA.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Digital circuits > Logic circuits
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