使用二阶多项式Nyquist波形降低系统对定时误差的灵敏度

Reduced sensitivity to timing error using second-order polynomial class of Nyquist pulses

在数字通信中,实际接收机判决不在最佳时刻将产生符间干扰,从而影响系统平均误码率。通过优化设计传输信号波形可以降低系统对抽样点时钟抖动的灵敏度。本文讨论了使用一类基于二阶多项式Nyquist脉冲的BPSK系统对定时误差的灵敏度问题。数值结果分析表明在该类脉冲波形中总可以找到合适的成员,较已有的Nyquist脉冲相比,具有更好的抗定时抖动性能。

During data communication, Intersymbol interference （ISI） will be produced if the decision of practical receiver has timing error. And it also affects the average bit error rate of the system. We can have lower sensitivity to timing error with better designed transmitted signal shapings. In this paper, the sensitivity to timing error of binary phase shift keying system which uses a second-order polynomial class of Nyquist pulses is studied. According to the analysis of the numerical value result, we can always find some members having strong anti-timing jitter capability in this class of pulses than other Nyquist pulse.