改进的GCS序列抑制OFDM峰均比方法  

An improved approach to PAPR reduction using GCS

作　　者：贾瑞涛[1] 马林华[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《电子技术应用》2012年第7期110-112,115,共4页Application of Electronic Technique

基　　金：陕西省电子信息系统综合集成重点实验室资助基金项目(201102Y02)

摘　　要：针对格雷互补序列GCS(Golay Complementary Sequence)图案少、只能用在子载波数量少的OFDM系统中的缺点,运用信号复制生成理论和相位预调制技术,提出一种改进的大子载波数OFDM系统PAPR抑制算法。算法能够在保证系统误码性能的情况下,有效降低OFDM系统峰均比,相比传统方法减小了计算的复杂度。仿真结果表明,对于已经采用PAPR抑制而设计的WLAN标准前导序列,该算法仍然可以将PAPR降低约1.3 dB,具有较高的工程应用价值。Considering that the quantity of Golay Complementary Sequence （GCS） is short and can be only used in OFDM sys- tem with less carrier waves, an improved approach using GCS to reduce peak-to-average ratio （PAPR） in OFDM system with more carrier waves is proposed. The proposed algorithm can efficiency reduce the PAPR in good BER performance and low complexity compared with tranditional method. The simulation result shows that the proposed algorithm can reduce the PAPR of WLAN pilots by 1.3 dB. Thus this approach has great value of using in communications.

关 键 词：正交频分复用 峰均比 格雷互补序列 信号复制 相位预调制 

分 类 号：TN911.3[电子电信—通信与信息系统]