Title :
A new noncoherent radar pulse compression based on complementary sequences
Author_Institution :
Electr. Eng. Dept., October 6 Univ., Cairo, Egypt
Abstract :
Noncoherent pulse compression (NCPC) is of interest to direct-detection laser ranging, and to simple radars that utilize noncoherent microwave power sources. In this technique, a unipolar sequence of pulses using on-off keying (OOK) modulation can be used in transmission. Bipolar binary complementary sequence pairs offer the possibility of perfect sidelobe cancellation, but in case of using unipolar codes, there is a severe degradation in the reflected echoes peak sidelobe level in compression filter response. Many techniques are suggested for sidelobe suppression. A recent technique used Manchester coding with a periodic autocorrelation of binary complementary pairs. This technique yields two large negative sidelobes response in addition to a broad bandwidth. In this paper, a new technique is proposed for NCPC via using a hybrid of two identical matched filters for each sequence. The output response is the sum of the complementary pair responses. This approach achieves a perfect correlation response with a peak of 2N (N is the length of each sequence) and a sidelobe level of zero without expanding the bandwidth in addition to implementation simplicity.
Keywords :
amplitude shift keying; binary sequences; matched filters; pulse compression; radar signal processing; Manchester coding; NCPC; OOK modulation; bipolar binary complementary sequence pairs; compression filter response; direct-detection laser ranging; matched filters; noncoherent microwave power sources; noncoherent radar pulse compression; on-off keying modulation; periodic autocorrelation; reflected echoes peak sidelobe level; sidelobe cancellation; sidelobe suppression; unipolar codes; unipolar sequence; Binary codes; Correlation; Encoding; Matched filters; Microwave filters; Modulation; Radar; complementary coded pulse compression; noncoherent pulse compression; on-off keying modulation;
Conference_Titel :
Radar Conference, 2014 IEEE
Conference_Location :
Cincinnati, OH
Print_ISBN :
978-1-4799-2034-1
DOI :
10.1109/RADAR.2014.6875808