Title :
Soft-decision multiuser detector for coded CDMA systems
Author :
Brandt-Pearce, Maïté ; Yang, Moon-Hwan
Author_Institution :
Virginia Univ., Charlottesville, VA, USA
Abstract :
A multiuser decoder/demodulator is presented that uses successive cancellation within the Viterbi (1990) decoder of each user in a code-division multiple access (CDMA) communication system. The decisions of high power users take into account decisions on several lower power users symbols and several hypothesis trellis paths are considered. The method is shown to perform significantly better than the traditional interference cancellation detector. The number of hypotheses and the number of low power users to cancel can be set as parameters so that the method provides for flexible computational complexity
Keywords :
Viterbi decoding; convolutional codes; demodulators; interference suppression; signal detection; Hadamard orthogonal convolutional code; Viterbi decoder; code-division multiple access; coded CDMA systems; computational complexity; hypothesis trellis paths; interference cancellation detector; multiuser decoder/demodulator; optimal maximum-likelihood sequence estimator; soft-decision multiuser detector; successive cancellation; Convolution; Convolutional codes; Delay; Demodulation; Detectors; Interference cancellation; Iterative decoding; Maximum likelihood decoding; Multiaccess communication; Viterbi algorithm;
Conference_Titel :
Communications, 1998. ICC 98. Conference Record. 1998 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-4788-9
DOI :
10.1109/ICC.1998.682874
