北京大学学报(自然科学版)

基于直接判决反馈的BPSK/QPSK信号幅度估计

潘申富,李振东,梁庆林   

  1. 北京大学电子学系卫星与无线通信实验室,北京,100871
  • 收稿日期:2003-05-08 出版日期:2004-09-20 发布日期:2004-09-20

Decision-Directed Feedback Amplitude Estimate for BPSK/QPSK Signal

PAN Shenfu, LI Zhendong, LIANG Qinglin   

  1. Satellite and Wireless Communication laboratory, department of electronics, Peking University,Beijing, 100871
  • Received:2003-05-08 Online:2004-09-20 Published:2004-09-20

摘要: 推导了理想高斯信道下信号幅度估计的克拉美-罗界(CRB),提出了一种基于直接判决反馈的BPSK/QPSK信号幅度估计算法,并对该算法的性能进行了理论分析和仿真。仿真结果表明,在直接判决反馈模式下,该算法的估计方差在高信噪比下接近克拉美罗界。

关键词: 克拉美-罗界, 参数估计, 直接判决反馈

Abstract: After the derivation of Cramer-Rao Bound (CRB) for amplitude estimation in AWGN channel, a decision directed feedback amplitude estimation algorithm for BPSK/QPSK signal is proposed, followed by its performance analysis and simulation. The simulation results show that the variance of the algorithm is very close to the CRBat high signal-to-noise ratio in decision directed feedback mode.

Key words: CRB, parameter estimation, decision-directed feedback

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