Statistical mechanics of CDMA multiuser demodulation
Graduate School of Engineering, Tokyo Metropolitan University
1-1 Minami-Osawa, Hachioji-shi, Tokyo, 192-0397 Japan
Accepted: 13 March 2001
I investigate the multiuser demodulation problem which arises in code-division multiple-access (CDMA) systems. The relationship between the multiuser demodulation problem and a variant of the Hopfield model is established, based on which the replica analysis of some multiuser demodulation schemes is performed. Analytical results are presented for the maximum-a-posteriori (MAP) demodulation, the optimal demodulation, and the naive mean-field approximation to the optimal demodulation.
PACS: 84.40.Ua – Telecommunications: signal transmission and processing; communication satellites / 75.10.Nr – Spin-glass and other random models / 89.70.+c – Information science
© EDP Sciences, 2001