非正弦时域正交调制系统定时误差抑制方法

Timing Error Mitigation Method of Non-Sinusoidal Orthogonal Modulation in Time Domain

定时误差可使非正弦时域正交调制系统的解词性能显著下降。针对该问题，该文提出了基于保护间隔的定时误差抑制方法。在分析非正弦时域正交调制信号特征的基础上，公式推导了定时误差在相关接收时引起的干扰分量，理论分析了码元间插入保护间隔的定时误差抑制方法的可行性，并进行了仿真验证。结果表明，这种方法可有效的提高系统的误码率性能。该方法尤其适合于对定时误差敏感或精确同步困难的通信系统。

Timing error may cause the BER performance of non-sinusoidal orthogonal modulation in time domain decreased significantly. For the issue, a method to suppress the effects of timing error based on guard interval was proposed. After analyzing the characteristics of the orthogonal signals, the interference components caused by timing error was derived. Then, theoretical analysis proved that the method of inserting guard interval between symbols were feasible. Results show that the method can effectively improve the BER performance. And it＇s particularly suitable for the systems sensitive to timing error or difficult to synchronize.