电子学报2011，Vol.39Issue(1)：168-171,4.
MQAM-OFDM系统中降低峰均比与残余载波频偏同步联合算法
Joint PAPR Reduction and Residual CFO Synchronization for MQAM-OFDM Systems
摘要
Abstract
A technique for the residual carrier frequency offset (CFO) tracking and the peak-to-average power ratio (PAPR) reduction in multilevel quadrature amplitude modulation (MQAM) based orthogonal frequency division multiplexing (OFDM) systerm is presented. The scheme is based on unknown pilot subcarriers modulated by the conjugate of the MQAM information data,cancelling their phases to reduce the maxim power. The conjugate code periodically inserted in the OFDM symbols allows the frequency tracking loop to estimate the phase offset using a derived formula. The simulation investigates the algorithm performance showing that the frequency can be precisely corrected and the PAPR can be reduced with several dB.关键词
正交频分复用/峰均比/载波频率偏差/同步Key words
orthogonal frequency division multiplexing(OFDM)/peak-to-average power ratio(PAPR)/carrier frequency offset(CFO)/ synchronization分类
信息技术与安全科学引用本文复制引用
戈立军,赵迎新,傅民皓,金宇昂,张冀,吴虹..MQAM-OFDM系统中降低峰均比与残余载波频偏同步联合算法[J].电子学报,2011,39(1):168-171,4.基金项目
国家自然科学基金(No.60872026) （No.60872026）
天津市应用基础及前沿技术研究计划重点项目(No.09JCZDJC16900) （No.09JCZDJC16900）
