现代电子技术2017，Vol.40Issue(5)：19-21,25,4.DOI:10.16652/j.issn.1004-373x.2017.05.005
降低MIMO-OFDM系统峰均比的QAP算法研究
Research on QAP algorithm for PAPR reduction of MIMO-OFDM system
摘要
Abstract
The MIMO-OFDM technology is a key technology of the fourth generation mobile communication system. The high peak-to-average power ratio(PAPR)exists in the MIMO-OFDM system because the multi-carrier modulation is adopted in the technology. In order to reduce the high PAPR of the MIMO-OFDM system,a QAP algorithm is proposed based on the ap-proximate gradient project(AGP)and partial transmission sequence(PTS). The MIMO-OFDM signal is processed with the AGP algorithm. The PTS algorithm is used to reduce the system PAPR further. The simulation analysis results show that,in compari-son with the traditional schemes,the system PAPR is dramatically improved with QAP scheme while the performance of the sys-tem bit error rate(BER)isn′t destroyed;the PAPR reduced by the QAP algorithm is affected by the quantity of the subcarrier, and increased with the increase of the subcarrier quantity(N=32,64,128,256,512);the PAPR performance of the QAP algorithm is best in the mode of the random allocation.关键词
多输入多输出-正交频分复用/近似梯度投影/部分传输序列/峰均比/误码率Key words
MIMO-OFDM/approximate gradient project/partial transmission sequence/PAPR/bit error rate分类
信息技术与安全科学引用本文复制引用
张博叶,李艳萍,耿晓文..降低MIMO-OFDM系统峰均比的QAP算法研究[J].现代电子技术,2017,40(5):19-21,25,4.基金项目
国家自然科学基金资助项目(61271249) （61271249）
