LOS MIMO系统多相位跟踪与补偿

Multiple phases tracking and compensation for LOS MIMO systems

针对LOS MIMO系统中分布式天线的多个发送端相位噪声和多个接收端相位噪声,基于LMS准则和线性均衡提出了多相位跟踪与补偿算法,通过仿真分析了该算法在不同的振荡器配置、相位噪声带宽、调制阶数和迭代步长下系统的误符号率性能。并与基于锁相环的多相位跟踪算法(PLL)作比较,结果表明:LMS算法的误符号率性能明显优于PLL算法,能有效降低LOS MIMO系统的误符号率,且更具有实用性。

Aiming at the multiple phase noises in distributed transmitter and receiver antennas of LOS MIMO systems,a tracking and compensation algorithm for multiple phases based on LMS criterion and linear equalization is proposed.The symbol error rate（SER） performance is analyzed by simulations under various oscillator configurations,phase noise bandwidth,modulation orders and step sizes.Then,compared with the existed algorithm based on phase-locked loop（PLL）,the simulation results show that the SER performance of the LMS algorithm is superior to the PLL algorithm.The proposed LMS algorithm can reduce the SER of LOS MIMO systems more efficiently,thus is more practicable than the PLL algorithm.