一种基于小波包变换的OFDM系统帧同步方案

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC) Pub Date : 2013-12-01 DOI:10.1109/JEC-ECC.2013.6766377

Ehab Farouk Badran, Marwa Samara, M. Aly

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引用次数: 3

摘要

正交频分复用技术(OFDM)在无线通信中得到了广泛的应用。本文的目的是利用小波包变换分析和改进OFDM系统的帧同步性能。众所周知，在OFDM中，为了减轻符号间干扰(ISI)的影响，每个符号都附加了一个循环前缀(CP)。本文在时域上将三元序列加入到CP中。在FFT-OFDM系统的基础上，采用了小波包变换。提高了瑞利衰落信道的误码率。同时，通过评价相关特性，改进了帧位置的检测。研究了多波和双正交等小波族。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A Novel Frame Synchronization Scheme Via Wavelet Packet Transform for OFDM systems

Orthogonal Frequency Division Multiplexing (OFDM) has been widely adopted in wireless communication. The aim of this paper is to analysis and improve performance of frame synchronization in OFDM system using wavelet packet transform. It is well known in OFDM that a cyclic prefix (CP) is appended to each symbol in order to mitigate the effect of Inter-Symbol-Interference (ISI). In this paper ternary sequences are added to the CP in the time domain. Wavelet packet transform is employed besides FFT-OFDM system. This improves the BER (Bit Error Rate) over Rayleigh fading channel. Also, the detection of the frame position is improved by evaluating the correlation characteristic. Wavelet families such as Daubechies and biorthogonal are studied.

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来源期刊

2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)

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