APR Reduction Technique based on OFDM Pilot Filter Bank Limiting for Satellite Mobile Communications
Combined with OFDM(Orthogonal Frequency Division Multiplexing),satellite mobile communications will effectively achieve on-demand communication in areas with an ultra-low density of users.With OFDM multiple access optimization,the bandwidth utilization efficiency can be increased by 5 to 10 times.However,satellites are power-constrained systems,so higher PAPR requires greater power back-off,resulting in a decline in satellite transmission capacity.To use OFDM technology in satellites,there are problems such as reduced transmission capacity resulted from high PAPR,complication of lowering PAPR,and difficulty in hardware implementation.In order to deal with the problem of high bit error rate and hardware implementation difficulties in PAPR reduction technique of non-orthogonal frequency division multiplexing,this paper proposes a limiting PAPR reduction technique with OFDM pilot filter banks for satellite mobile communications.Firstly,the applicability of OFDM in satellite mobile communications is analyzed,and the influence of high PAPR on satellite power utilization and the influence of frequency shift sensitivity on inter-satellite communication interference are obtained.Then design the PAPR reduction technique based on the pilot filter bank.By setting the tunable filter bank to the pilot,the sideband power suppression in the OFDM frequency domain is realized,and the PAPR of the OFDM signal is reduced.Finally,the experimental results show that the PAPR performance is improved by 3dB without reducing the bit error rate.
Tianfang Dai
School of Mechanical and Electrical Engineering,University of Electronic Science and Technology of China,611731 Chengdu,China
国际会议
2018 International Symposium on Water System Operations(ISWRSO 2018)(2018年水资源系统及调度国际研讨会)
北京
英文
1-5
2018-10-12（万方平台首次上网日期，不代表论文的发表时间）