Iterative Multiuser Receiver Based on Factor Graph for Asynchronous Coded CDMA Systems |
| |
| Authors: | Luo Hanwen Wang Haoxing |
| |
| Affiliation: | Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, P.R.China;Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, P.R.China;Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, P.R.China |
| |
| Abstract: | Factor graph, so named because it graphically represents function factorization, with which and its sum-product algorithm the iterative algorithm can be deri ved clearly. An iterative multius-er receiver based on factor graph for asynchronous coded CDMA system is proposed. In this paper, the a posteriori probability of users information bits conditioned on the noise-whitening filters output is represented by factor graphs, after numbers of iterations with the sum-product algorithm the information bits are estimated. The authors also propose a reduced complexity algorithm. Simulation results show that with this proposed receiver, near-single-user performance can be achieved, and small performance degradation for the reduced complexity algorithm with signifi-cant complexity reduction. |
| |
| Keywords: | multiuser detection iterative algorithm multiuser decoding |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
