期刊名称：Indian Journal of Innovations and Developments
印刷版ISSN：2277-5382
电子版ISSN：2277-5390
出版年度：2012
卷号：1
期号：12
页码：816-820
语种：English
出版社：Indian Society for Education and Environment
摘要：Objective: In order to minimize the system degradation, the main aim is to measure the performance of the HPA by simulation. This has been done with the evaluation of Bit Error Rate because this quantifies the reliability of the entire communication system from ‘bits in’ to ‘bits out’ including the electronics, antennas and signal path in between. Method: A comparative study and analysis of the performance of band limited M-ary PSK signal transmitted through band pass nonlinearity, typically an on-board TWT amplifier in a satellite repeater, exhibiting AM-AM and AM-PM conversions is carried out in terms of BER plots and constellation diagram using TOPSIM simulation tool. Application : The measurement of performance by simulation will help in tracking down the offending elements and will be useful for implementation in the actual design Conclusion: It is observed from the BER plots for M-ary PSK modulation system in the presence of TWTA non linearity having different uplink noise and input back off level that the performance of BER drastically goes down. Thus it gives the precaution that should be taken before passing the attenuated signal through high power amplifier.
其他关键词：Bit Error Rate; TWTA; Phase Shift Keying; High Power Amplifier
