针对接收天线数少于发送天线数并且大于发送天线数一半的多天线系统,在研究原有PDA检测算法的基础上,提出了推广的PDA检测算法,并讨论了影响算法性能的因素和改进方法,之后对算法进行了修改使之能够适用于迭代检测.仿真表明推广的PDA检测算法能够有效改进检测性能,迭代后大大提高了系统性能.
By studying the existing probabilistic data association (PDA) algorithm for MIMO system, this paper proposed a generalized probabilistic data association (GPDA) algorithm for system with the number of receiving antennas less than transmitting antennas and more than half of transmitting antennas. Factors affecting the system performance are discussed, and the GPDA algorithm is revised to be suitable for iterative detection. Simulation results indicate that the GPDA method can effectively improve the detection performance, and the iterative detection can further improve the performance.