基于PCC-OWDM技术的无线图像传输系统的研究  

Wireless Image Transmission System Based on PCC-OWDM Technology

作　　者：王学伟[1] 陈雷[1] 杨雯[2] 

机构地区：[1]北京化工大学信息科学与技术学院,北京100029 [2]北京电子科技职业学院,北京100029

出　　处：《通信技术》2009年第5期37-39,共3页Communications Technology

基　　金：国家高科技研究发展计划(863)资助项目(2005AA305G70)。

摘　　要：OFDM因循环前缀的采用,降低带宽利用率,而采用FWT(快速离散小波变换)的OWDM(正交小波复用)可以改善该性能。采用卷积码生成的PCC(删余卷积码)作为系统的信道编码。在AWGN和多径衰落信道模型下,对基于三种不同码率的PCC-OWDM系统的误码性能进行研究,并分析较好码率下,基于不同路径数的多径衰落信道对系统性能的影响。结果表明:R2/3码率下的PCC-OWDM系统具有较少的时间复杂度和较好的误码性能。With the use of cyclic prefix, OFDM system decreases bandwidth utilization, and OWDM（Orthogonal Wavelet Division Multiplexing） with FWT（fast discrete wavelet transform） could improve this performance. PCC （punctured convolutional codes） that is generated by （2, 1, 4） convolutional codes is used as channel coding of the system. BER performances of PCC- OWDM system with three different code rates are studied in AWGN and multipath fading channel model respectively. In addition, the influence of multipath fading channels on the system performance, with the same better code rate and based on different numbers of path, is analyzed. The experiment results show that the PEC-OWDM system with R2/3 code rate has Iess time complexity and better error performance.

关 键 词：快速离散小波变换 正交小波复用 删余卷积码 无线图像传输 

分 类 号：TN911.8[电子电信—通信与信息系统]