摘要
针对小波提升变换的正交频分复用(LWT-OFDM)系统峰均功率比(PAPR)过高的问题,采用了部分传输序列(PTS)与指数压扩变换的联合算法。首先由PTS算法选出系统中峰值最小的一组信号,再通过指数压扩变换来降低峰均功率比。仿真结果表明,相对于其它的限幅类技术,本文所提联合算法在该系统中能更有效的降低峰均功率比,并且误码率相对较低。
To solve the problem of high peak-to-average power ratio of LWT-OFDM system,this paper adopts the combination algorithm of part transmission sequences and exponential companding transformation. First,pick out a set of signal with the smallest peak value through PTS algorithm,and then through exponential companding transformation to reduce PAPR.From the simulation,compared with other limit amplitude technique,the combination algorithm can lower the PAPR effectively in this system,and the bit error rate is relatively low.
出处
《数字通信》
2014年第6期8-11,共4页
Digital Communications and Networks
关键词
小波提升变换
正交频分复用
部分传输序列
压扩变换
峰均功率比
误码率
lifting wavelet transformation（LWT）
orthogonal frequency division multiplexing（OFDM）
part transmission sequences（PTS）
companding transformation
peak to average power ratio（PAPR）
bit error rate（BER）
