摘要
在介绍相位噪声定义的基础上,分析了相移键控(PSK)接收系统的本振信号源相位噪声对误码率的影响。以QPSK调制方式为例,仿真了相位噪声对系统误码率影响,结果证明了接收系统中本振信号源相位噪声的重要性。以实际工程中使用的本振信号源为例,推导了相位噪声和信号抖动所导致的BPSK和QPSK接收系统信噪比的限制。理论分析与工程实践相结合,可以更好地得出相位噪声对PSK接收系统的影响,对接收系统的工程设计具有一定的指导意义。
According to the concept of phase noise, this paper analyses the effect of IX）（ Local Oscillator） signal source phase noise on bit error rate （BER） performance of a phase shift keying （PSK） communication system. A quadrature phase shift keying（QPSK） system example is used to predict the effect of phase noise on BER. Simulation results prove that the phase noise of LO is important in a receiver system. Taking the LO signal source used in engineering as example, the Signal- to- Noise Ratio（SNR） limitation of BPSK or QPSK receiver system due to phase noise and jitter is derived. The research has significance in engineering - oriented application of receiver system.
出处
《电讯技术》
北大核心
2011年第7期174-177,共4页
Telecommunication Engineering
