Factor graph, so named because it graphically represents function factorization, with which and its sum-product algorithm the iterative algorithm can be derived clearly. An iterative multiuser receiver based on factor...Factor graph, so named because it graphically represents function factorization, with which and its sum-product algorithm the iterative algorithm can be derived clearly. An iterative multiuser 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 significant complexity reduction.展开更多
Y2001-62866-522 0121206在 DS-CDMA 系统中应用多电平阈值的双静态串行检索算法=Double-dwell serial search algorithm with mul-ti-level threshold values in DS-CDMA systems[会,英]/Lee,S.-J.& Kim,J.//2000 International Co...Y2001-62866-522 0121206在 DS-CDMA 系统中应用多电平阈值的双静态串行检索算法=Double-dwell serial search algorithm with mul-ti-level threshold values in DS-CDMA systems[会,英]/Lee,S.-J.& Kim,J.//2000 International Conferenceon Communication Technology Proceedings Vol.Ⅰ展开更多
基金the National Science Foundation of China and Key Subject Project of the Ministry of Education.
文摘Factor graph, so named because it graphically represents function factorization, with which and its sum-product algorithm the iterative algorithm can be derived clearly. An iterative multiuser 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 significant complexity reduction.
文摘Y2001-62866-522 0121206在 DS-CDMA 系统中应用多电平阈值的双静态串行检索算法=Double-dwell serial search algorithm with mul-ti-level threshold values in DS-CDMA systems[会,英]/Lee,S.-J.& Kim,J.//2000 International Conferenceon Communication Technology Proceedings Vol.Ⅰ
