低复杂度的TDMA开环载波相位同步算法  

Low-complexity open loop carrier phase synchronization algorithm for TDMA

作　　者：陈思[1] 张邦宁[1] 王娜[1] 

机构地区：[1]解放军理工大学通信工程学院卫星通信系,江苏南京210007

出　　处：《重庆邮电学院学报（自然科学版）》2006年第4期459-462,共4页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

摘　　要：研究了一种实用的开环载波相位估计算法。首先,应用QLBAR算法对QPSK信号进行相位估计,然后采用双ROM算法消除相位模糊抖动,经过算法改进后,系统的误比特率性能得到提高,并大大降低了运算复杂度,从而得到一种实用的开环载波相位估计算法。对改进前后的算法进行了性能仿真,在误码率为5×10-2时,信噪比比改进前降低了约1.5 dB。对于具有低复杂度和开环结构要求的星上解调来说,具有重要的实用价值。This paper makes a search on an applied algorithm for open loop carrier phase estimation. First, it makes a phase estimation to QPSK signal by using QLBAR algorithm, then adopts double ROM to eliminate phase equivocation. It can get a better performance of bit error rate and reduce the complexities depending on this improved algorithm. So, it is an applied algorithm for open loop carrier phase estimation. This paper gives the emulation to the algorithm improved and unimproved. As the result show, if the bit error rate is 5×10^-2 , the SNR can be lower than the one unimproved at about 1.5 dB. It has important applied value to the demodulation on board, which requires a low complexities and open configuration.

关 键 词：载波相位估计 线性重心算法 相位模糊抖动 

分 类 号：TN927[电子电信—通信与信息系统]