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2012-07-17
Extended Optimal Filters for Adaptive-Ontransmit Radar Systems Using Binary Codes
By
Progress In Electromagnetics Research, Vol. 130, 41-66, 2012
Abstract
This study introduces an extended optimal filtering technique for adaptive-on-transmit radar based on the transmission of pseudorandom noise waveforms as a method to simultaneously achieve low sidelobe level and spectral purity without degrading the main peak of the cross-correlation function. The proposed method is an extended version of the classical optimal filtering technique, resulting in longer codes with three simultaneously improved features that usually work in trade-off: 1) the cross-correlation function (CCF) sidelobe level is reduced in direct proportion to the filter length, K; 2) the out-of-band spectral suppression is at least 40 dB for pseudorandom binary sequences (PRBS); and 3) the frequency spectrum tail presents a decay given by K-4, offering larger out-of-band frequency suppression. The proposed technique provides skewsymmetry to the input signal and is tested on PRBS, Barker, and Golay pair of complementary codes. The proposed codes are also demonstrated to be Doppler resistant and offer better multipath capability.
Citation
Ana Vazquez Alejos, Muhammad Dawood, and Manuel Garcia Sanchez, "Extended Optimal Filters for Adaptive-Ontransmit Radar Systems Using Binary Codes," Progress In Electromagnetics Research, Vol. 130, 41-66, 2012.
doi:10.2528/PIER12041007
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