相位噪声对WLAN系统的影响

相位噪声是引起WLAN系统射频失真的重要原因之一.针对相位噪声引起的射频失真对WLAN系统误比特率的影响问题,引入和分析了一种相位噪声模型并把此模型产生的相位噪声用于WLAN系统中.通过对WLAN系统的分析和计算机仿真,研究了相位噪声对该系统误比特率的影响.仿真结果说明：相位噪声也是系统的噪声源,不能忽略.当系统采用16QAM调制时,相位噪声对系统误比特率的影响较大;而当该系统采用BPSK调制时,相位噪声对该系统误比特率的影响较小.这些仿真分析结果在实际应用当中具有重要的意义.

The Effect of Phase Noise on WLAN System

Phase noise is one of the most important reasons arousing radio frequency distortion of WLAN system.Considering the phase noise effect on BER of WLAN system,this paper introduces a phase noise model and applies the model to WLAN system,investigates the phase noise effect on BER of WLAN system through analysis and computer simulation.Simulation results indicate that phase noise is also a noise source of system and should not be ignored.BER is affected by phase noise greatly when 16QAM modulation is used to WLAN,while slightly when BPSK modulation is used to WLAN.These simulation and analysis results are very important in practical application.