Title :
Performance Comparison of Spreading Sequences in Synchronous MC-CDMA Systems
Author :
Gu, Z. ; Xie, S. ; Rahardja, S. ; Sze, E.T. ; Xin, Y.
Author_Institution :
Inst. for Infocomm Res., Singapore
Abstract :
The bit error rate (BER) performance of various spreading sequences in a synchronous multicarrier code-division multiple access (MC-CDMA) system is compared by numerical simulations in this paper. The underlying subcarriers are correlated. Gold, orthogonal Gold, 4-phase family A, Walsh-Hadamard (WH) and new orthogonal unified complex Hadamard transform (UCHT) sequences are investigated here. Simulation results show that both orthogonal WH and UCHT sequences give the best BER performance among various spreading sequences. The disparity in performance between the various spreading sequences can be explained by the property of the zero-delay cross-correlation in frequency domain
Keywords :
Hadamard transforms; code division multiple access; correlation methods; error statistics; sequences; BER performance; bit error rate; multicarrier code-division multiple access; orthogonal Gold sequence; orthogonal UCHT sequence; orthogonal Walsh-Hadamard sequence; synchronous MC-CDMA system; unified complex Hadamard transform; zero-delay cross-correlation; Bit error rate; Fading; Frequency diversity; Gold; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Numerical simulation; OFDM; Rayleigh channels;
Conference_Titel :
Information, Communications and Signal Processing, 2005 Fifth International Conference on
Conference_Location :
Bangkok
Print_ISBN :
0-7803-9283-3
DOI :
10.1109/ICICS.2005.1689124
