高功率放大器的相位失真对系统性能的影响(英文)

Effects of HPA Phase Distortion on System Performance

目前关于高功率放大器的研究中,很少有文献详细分析关于相位失真对系统性能的影响。尤其是在对SSPA功放的分析中,许多文献认为其相位失真为0。基于典型的TWTA和SSPA模型,从星座图弥散,误码率(BER),功率谱密度(PSD),系统总性能损失(TD)等几方面进行仿真,深入分析了相位失真对OFDM无线通信系统性能的影响。根据仿真分析得出了重要结论。

There have been few papers discussing about the phase distortion of High Power Amplifier （HPA） in detail, and many literatures concerning about the HPA have considered the AM/PM distortion of Solid State Power Amplifier （SSPA） as zero. The influence of AM/PM distortion of HPA was deeply analyzed by evaluating BER, Total Degradation （TD） and Power Spectral Density （PSD） performances in wireless OFDM systems. Traveling Wave Tube Amplifier （TWTA） and Solid State Power Amplifier （SSPA） based HPA models are adopted for the computer simulations and analysis. Some useful and important conclusions are drawn to deal with phase distortion in the process of HPA predistortion.