全数字接收机中基于准自适应短时反馈的残余频偏纠正算法

本文介绍了一种在全数字接收机中应用的残余频偏纠正算法,此算法通过均方误差准则检测分析有无残余频偏,并规定一个合适的步长值,利用逐次逼近的原理不断反馈以进行残余频偏的纠正,从而有效改善因残余频偏的累积效应而引起的误码率增大问题。仿真结果显示,纠正后系统的误码率显著下降,接收码元的质量得到明显的改善。

A Residual Frequency Offset Correction Algorithm Based on the Quasi-Adaptive Short-Term Feedback in All-Digital Receiver

A residual frequency offset correction algorithm in all-digital receiver is introduced.The algorithm detects whether there is residual frequency offset by using of mean-square error criteria,and then makes a proper step to correct the residual frequency offset by the criteria of short-time feedback algorithm.It effectively improves the increasing BER problem caused by residual frequency offset accumulation effect.The simulation results show that the BER decreases obviously after the correction and the quali...