Title :
A new chip-level differential detection system for DS-CDMA
Author :
Shi, Qicai ; O´Dea, Robert J. ; Martin, Frederick
Author_Institution :
Florida Commun. Res. Lab, Motorola Labs, Plantation, FL, USA
Abstract :
In this paper we mathematically prove that if the original spreading Pseudo-Noise (PN) code is an m-sequence or a Gold-sequence, then the chip-by-chip differential decoding (CBCDD) sequence of the original PN code is a cyclic shift version of the original PN sequence. By utilizing this property, we design a new chip-level differential detection system for DS-CDMA, which does not require any chip-level differential encoding in the transmitter. We demonstrate simplicity of implementation and robust operation in the presence of carrier frequency shift
Keywords :
code division multiple access; decoding; demodulation; differential detection; frequency shift keying; m-sequences; phase shift keying; pseudonoise codes; spread spectrum communication; BPSK; DPSK; DS-CDMA; FSK; Gold-sequence; PN code; carrier frequency shift; chip-by-chip differential decoding sequence; chip-level differential detection system; m-sequence; spreading pseudo-noise code; Decoding; Detectors; Fading; Frequency division multiaccess; Gold; Multiaccess communication; Robustness; Time division multiple access; Transmitters; Wireless communication;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Conference_Location :
New York, NY
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996912
