Study on Complex Wavelet Packet Based OFDM Modulation (CWP-OFDM)

ZHANG Xiao-dong; XU Ping-ping; ZHANG Guo-an; BI Guang-guo

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Study on Complex Wavelet Packet Based OFDM Modulation (CWP-OFDM)

更新时间：2025-07-16

- Study on Complex Wavelet Packet Based OFDM Modulation (CWP-OFDM)
- Acta Electronica Sinica Vol. 30, Issue 4, Pages: 477-479(2002)
- 作者机构：
  
  1. 南瑞集团通信系统分公司,江苏,南京,210003
  2. 东南大学无线电系,江苏,南京,210096
  3. 南通工学院,江苏,南通,226007
  4. 南瑞集团通信系统分公司江苏南京,210003
  5. 东南大学无线电系江苏南京,210096
  6. 南通工学院江苏南通,226007
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN914.3
- Published：2002
- 稿件说明：
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ZHANG Xiao-dong, XU Ping-ping, ZHANG Guo-an, et al. Study on Complex Wavelet Packet Based OFDM Modulation (CWP-OFDM)[J]. Acta Electronica Sinica, 2002, 30(4): 477-479.
DOI：

ZHANG Xiao-dong, XU Ping-ping, ZHANG Guo-an, et al. Study on Complex Wavelet Packet Based OFDM Modulation (CWP-OFDM)[J]. Acta Electronica Sinica, 2002, 30(4): 477-479. DOI：

摘要

目前

基于DFT变换的OFDM高效调制方法(DFT-OFDM)已经成为无线传输领域中的重要研究热点.但是

为达到较高的业务质量

DFT-OFDM采用了插入循环前缀(CP)的办法以减少ISI

从而降低了频谱利用率.为进一步改善频谱的利用效率

本文提出一种基于复小波包(Complex Wavelet Packet)正/反变换的OFDM调制方法(CWP-OFDM)

并且将其与DFT-OFDM进行比较.仿真结果表明

在GSM TU50 信道环境中

当具有更高频谱效率的情况下

CWP-OFDM可以具有与DFT-OFDM同样或更好的误码性能.

Abstract

The DFT based OFDM has currently been mostly focused in the area of wireless communications.To attain to a high level QOS and reduce ISI

cyclic prefixes are inserted between DFT-OFDM symbols

which decrease the efficiency of spectrum.To improve spectrum efficiency

a complex wavelet packet transform based OFDM (CWP-OFDM) is proposed in this paper and used to compare with the DFT-OFDM under the same conditions.Simulation results show that

over GSM TU50 channels

when there is a much higher efficiency in using wireless spectrum

CWP-OFDM performs the same as or better than DFT-OFDM.

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