Title :
Turbo code and star 16-QAM for DS/SSMA communications
Author :
Ku, Bon-Jin ; Yang, Ha-Young ; Yoon, Suk-Hyon ; Han, Sang-Cheol ; Kang, Chang-Eon
Author_Institution :
Dept. of Electr. & Comput. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
In this paper, we propose a turbo coding scheme for spread spectrum with bandwidth efficiency. The scheme has a good performance on Gaussian channels and Rayleigh fading channels. We also show that the turbo code is powerful in multi-user environments. In our research, the turbo coded direct-sequence spread spectrum multiple access (DS/SSMA) system with differentially encoded star 16-QAM modulation is investigated in both aspects of error control performance and bandwidth efficiency. The results show that the coding system has a good error performance and spectral efficiency of 2 bits/s/Hz with star 16-QAM
Keywords :
AWGN channels; Rayleigh channels; Reed-Solomon codes; channel coding; concatenated codes; convolutional codes; error correction codes; error statistics; iterative decoding; multi-access systems; quadrature amplitude modulation; spread spectrum communication; turbo codes; DS/SSMA communication; Gaussian channels; Rayleigh fading channels; bandwidth efficiency; differential encoding; direct-sequence spread spectrum multiple access; error control performance; multi-user environments; star 16-QAM modulation; turbo code; Bandwidth; Convolutional codes; Encoding; Error correction; Fading; Iterative decoding; Modulation coding; Quadrature amplitude modulation; Spread spectrum communication; Turbo codes;
Conference_Titel :
Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-5582-2
DOI :
10.1109/PACRIM.1999.799545
