NDLI: A novel approach to improve Doppler tolerance of polyphase code

Content Provider	IEEE Xplore Digital Library
Author	Bo Liu Yiming Pi Xiaobo Yang Rui Min Wei Wu
Copyright Year	2009
Description	Author affiliation: Institute of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China (Bo Liu; Yiming Pi; Xiaobo Yang; Rui Min; Wei Wu)
Abstract	Polyphase codes have a large mainlobe-to-sidelobe ratio in matched filter processing. However, the conventional matched filter processing of polyphase codes suffer severe signal loss in performance under large Doppler environment. The basic approach for overcoming the Doppler effect is to use a bank of Doppler-matched filters. Each of the Doppler-matched filters is designed to match a different Doppler frequency. However, the brute force method causes heavily computed burden. This paper proposed a novel correlator based on partial match filter (PMF), followed by the FFT and maximum output selector. The method can simultaneously search all possible Doppler frequencies. The processing scheme can cancel the phase rotation resulted from Doppler frequency, therefore, improve Doppler tolerance when detecting polyphase codes. The performance for the Doppler tolerance improves with decreasing of size of partial correlator and FFT. The scalloping loss can be compensated by zero-padding FFT.
Starting Page	558
Ending Page	561
File Size	3529285
Page Count	4
File Format	PDF
ISBN	9781424448869
DOI	10.1109/ICCCAS.2009.5250442
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Matched filters Radar detection Optimization methods Signal processing Frequency Correlators Doppler radar Electronic mail Autocorrelation Signal to noise ratio
Content Type	Text
Resource Type	Article

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