DocumentCode :
2975928
Title :
Range sidelobe suppression in a desired Doppler interval
Author :
Chi, Yuejie ; Pezeshki, Ali ; Calderbank, Robert ; Howard, Stephen
Author_Institution :
Princeton Univ., Princeton, NJ
fYear :
2009
fDate :
8-13 Feb. 2009
Firstpage :
258
Lastpage :
262
Abstract :
We present a novel method of constructing a Doppler resilient pulse train of Golay complementary waveforms, for which the range sidelobes of the pulse train ambiguity function vanish inside a desired Doppler interval. This is accomplished by coordinating the transmission of a Golay pair of phase coded waveforms in time according to the 1´s and -1´s in a biphase sequence. The magnitude of the range sidelobes of the pulse train ambiguity function is shown to be proportional to the magnitude spectrum of the biphase sequence. Range sidelobes inside a desired Doppler interval are suppressed by selecting a sequence whose spectrum has a high-order null at a Doppler frequency inside the desired interval. We show that the spectrum of the biphase sequence obtained by oversampling the length-2M Prouhet-Thue-Morse (PTM) sequence by a factor m has an Mthorder null at all rational Doppler shifts thetas0=2pil/m, where lne0 and mne1 are co-prime integers. This spectrum also has an (M-1)th-order null at zero Doppler and (M-h-1)thorder nulls at all Doppler shifts thetas0=2pil/(2hm), where lne0 and mne1 are again co-prime and 1leshlesM-1.
Keywords :
Doppler radar; Doppler shift; Golay codes; phase coding; sequences; Doppler frequency; Doppler resilient pulse train; Golay complementary waveform; Prouhet-Thue-Morse sequence; biphase sequence; co-prime integer; desired Doppler interval; phase coded waveform; range sidelobe suppression; rational Doppler shift; Australia; Autocorrelation; Delay; Doppler effect; Doppler radar; Doppler shift; Frequency; Pulse compression methods; Shape control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Waveform Diversity and Design Conference, 2009 International
Conference_Location :
Kissimmee, FL
Print_ISBN :
978-1-4244-2970-7
Electronic_ISBN :
978-1-4244-2971-4
Type :
conf
DOI :
10.1109/WDDC.2009.4800356
Filename :
4800356
Link To Document :
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