Quantum Multi-user Detection Scheme with Discrete Coherent States Approximation
Multi-user detection (MUD) techniques will be adopted in the future wired and wireless communication system. It is known that quantum detection techniques promise efficient optimal solutions to this NP (non-polynomial) hard problem in classical domain. “Discrete coherent state(DCS) approximation method is a practical model for solving the mixed-state detection problem. In this paper, we use DCS approximation model for the MUD problem. For a noisy quantum channel, it is feasible to consider the output states are mixed states, which are the input pure states corrupted by the noise when the pure states pass thought the noisy quantum channel. For simplicity and generality, we deduce the error probability of symbol against correlation coefficient in two users fashion. By numerical simulations, we analyze and compare the performance of this representation. The simulation results show that the detection error will increase while the correlation coefficient increase, and the performance is also effected by the noise level. With less noise, the system will get better performance. The DCS approximation representation is a good detection scheme for quantum multi-user detection.
Multi-user detection Coherent state signals discrete coherent-state approximation
Shengmei Zhao Feng Gao XiaoLiang Dong Baoyu Zheng
Institute of Signal Processing and Transmission, Nanjing University of Posts & Telecommunications, Nanjing, China, 210003
国际会议
2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)
北京
英文
1569-1572
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）