一种用于多载波正交频分复用（OFDM）多媒体网络的跨层分集技术。

A cross-layer diversity technique for multicarrier OFDM multimedia networks.

作者信息

Chan Yee Sin, Cosman Pamela C, Milstein Laurence B

机构信息

Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, CA 92093-0407, USA.

出版信息

IEEE Trans Image Process. 2006 Apr;15(4):833-47. doi: 10.1109/tip.2005.863967.

DOI:10.1109/tip.2005.863967

PMID:16579372

Abstract

Diversity can be used to combat multipath fading and improve the performance of wireless multimedia communication systems. In this work, by considering transmission of an embedded bitstream over an orthogonal frequency division multiplexing (OFDM) system in a slowly varying Rayleigh faded environment, we develop a cross-layer diversity technique which takes advantage of both multiple description coding and frequency diversity techniques. More specifically, assuming a frequency-selective channel, we study the packet loss behavior of an OFDM system and construct multiple independent descriptions using an FEC-based strategy. We provide some analysis of this cross-layer approach and demonstrate its superior performance using the set partitioning in hierarchical trees image coder.

摘要

分集可用于对抗多径衰落并提高无线多媒体通信系统的性能。在这项工作中，通过考虑在缓慢变化的瑞利衰落环境中通过正交频分复用（OFDM）系统传输嵌入式比特流，我们开发了一种跨层分集技术，该技术利用了多描述编码和频率分集技术。更具体地说，假设是一个频率选择性信道，我们研究了OFDM系统的分组丢失行为，并使用基于前向纠错（FEC）的策略构建多个独立描述。我们对这种跨层方法进行了一些分析，并使用分层树状图像编码器中的集合划分展示了其卓越性能。