摘要
针对利用多个独立天线对同一信号进行协同接收的问题,推导了数据辅助(DA)和非数据辅助(NDA)方式BPSK/QPSK信号频率及相位估计的Cramer-Rao下界(CRLB),并与传统单个天线接收时的CRLB进行了比较。结果表明,在DA方式下,多天线协同接收PSK信号频率及相位估计的CRLB与传统单天线接收的CRLB相同;在NDA方式下,多天线协同接收的CRLB则要低于传统单天线接收的CRLB。
This paper investigates the PSK parameter estimation problem with multiple independent cooperative re- ceivers, and derives the Cramer-Rao Lower Bounds （CRLBs） of BPSK/QPSK frequency and phase estimation based on either known or random data. Compared with the CRLBs in traditional single receiver, the results indicate that the CRLBs for Data-Aided （DA） carrier frequency and phase estimation of PSK signals in multi-antenna coop- erative receivers are the same with the CRLBs in traditional single receiver, but the CRLBs for Non-Data-Aided（NDA） estimation for multi-antenna cooperative receivers are lower than the traditional ones.
出处
《计算机工程与应用》
CSCD
2012年第22期142-146,共5页
Computer Engineering and Applications
