Title :
Design and analysis of new p(n,k) polyphase pulse compression codes
Author :
Felhauer, Tobias
Author_Institution :
Res. Group for RF Commun., Kaiserslautern Univ., Germany
fDate :
7/1/1994 12:00:00 AM
Abstract :
P(n,k) codes as a new class of polyphase pulse compression codes are introduced and analyzed in detail. The P(n,k) codes are conceptually derived by step approximation of the phase function of a nonlinear-frequency modulated (NLFM) Chirp signal with a favorable energy density spectrum. The significant advantages of P(n,k) codes over conventional polyphase codes are lower autocorrelation sidelobes and an improved tolerance of low Doppler shifts and precompression bandwidth limitations. The primary disadvantage of the P(n,k) codes over conventional codes is a loss in range resolution. The uniform P(n,k) codes are especially attractive for radars employing digital signal professing because their favorable correlation properties also remain when quantization effects are taken into account
Keywords :
codes; coding errors; correlation methods; radar theory; Doppler shifts; P(n,k) codes; autocorrelation sidelobes; correlation; digital signal; energy density spectrum; nonlinear-frequency modulated chirp signal; phase function; polyphase codes; polyphase pulse compression codes; precompression bandwidth limitations; quantization effects; radars; range resolution; step approximation; Autocorrelation; Bandwidth; Chirp modulation; Doppler radar; Doppler shift; Energy resolution; Modulation coding; Phase modulation; Pulse compression methods; Signal resolution;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
