High Quality OFDM Communication System based on Carrier Interferometry and Digital Linearization of HPA
For this nonlinear compensation, we address the PAPR reduction method and linearization of HPA at the same time.High quality OFDM communication system is our goal, which can be possible to use the carrier interferometry in the OFDM system and to digitally linearize the nonlinear HPA. The first method is a CI/OFDM (carrier interferometry OFDM) for PAPR reduction of the OFDM signal and the second is the predistortion of HPA for the linearization. In this paper, CI/OFDM system is implemented in the DSP board and RF communication board. Also, polynomial-based predistorter is used for the linearization of the HPA. The CI/OFDM uses full frequency diversity and is robust to the narrow band interference. CI/OFDM lowers down the high PAPR and we can compensate the HPA non-linear distortion by digital predistorter. It is shown that the designed CI/OFDM system has better BER performance and higher power efficiency than the ordinary OFDM system
High quality OFDM CI/OFDM PAPR HPA digital linearizer
Heung-Gyoon Ryu Ke-Chu Yi
Department of Electronic Engineering,Chungbuk National University, 361-763 KOREA State Key Lab. of Integrated Service Networks Xidian University, Xian 710071, China
国际会议
上海
英文
2007-09-21(万方平台首次上网日期,不代表论文的发表时间)