摘要
在阵列天线接收系统中,最优空-时联合多用户检测器的运算复杂度与用户数量成指数关系而不实用。把极大似然空-时联合多用户检测问题转化为带约束的二次规划问题,并以QPSK信号为研究对象,将ε近似算法应用于空-时联合多用户检测中。ε近似算法计算复杂度与用户数成多项式关系,仿真表明,性能优于现有文献的算法。
In the array antenna receive system,optimum space-time multiuser detector becomes no practical value because it's computational complexity has the exponential relation with the number of users.maximum likelihood joint space-time multiuser detection problem was turn into a quadratic programming problem with constraints.And the QPSK signal is studied.using the ε-Approximation algorithms.Simulation results show that the proposed new algorithm is better than the existing literature algorithms.
出处
《广西通信技术》
2011年第1期30-33,共4页
Guangxi Communication Technology
