An adaptive receiver of joint data and channel estimation for meteor burst communications
An adaptive receiver of joint data and channel estimation for meteor burst communications
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DOI：
10.1002/dac.1182
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发表时间：
2011-06
影响因子：
2.1
通讯作者：
Jueping Cai;Zan Li;Xiaojun Chen;B. Hao
中科院分区：
文献类型：
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作者：
Jueping Cai;Zan Li;Xiaojun Chen;B. Hao
针对流星突发信道的特点，为了提高系统的平均吞吐量，需要采用可变速率的数据传输方式，但在接收端存在信道跟踪和均衡问题。虽然最大似然序列检测的联合数据和信道估计执行每个幸存者处理（PSP）的原则被认为是一个最佳的检测方案，其巨大的计算复杂度是一个主要问题，很难适应流星信道的减少。在估计系统参数的基础上，采用了一种自适应状态约简的PSP（ASRP）算法，该算法在网格图中只包含少量状态，而这些状态是根据流星信道的指数衰减特性通过时变阈值来选择的。仿真结果表明，ASRP算法在性能和计算复杂度之间取得了较好的折衷，为流星余迹通信系统的自适应调制编码提供了可靠的数据传输。计算机模拟结果和性能分析也包括支持我们的发展。版权所有© 2010约翰威利父子有限公司.
In view of the characteristics of the meteor burst channel, the variable rate data transmission should be adopted to improve the system average throughput, which results in channel tracing and equalization problems at the receiver. Although the joint data and channel estimation of maximum likelihood sequence detection performing the principle of per‐survivor processing (PSP) is considered as an optimal detection scheme, its great computational complexity is a major problem and can hardly agree with the decreasing of the meteor channel. Based on the estimation of the system parameters, an adaptive state reduction of the PSP (ASRP) algorithm with only a few states in the trellis diagram is employed, while these states are chosen by the time‐varying threshold according to the exponential decay of meteor channels. It is shown that, ASRP can make a good tradeoff between the performance and the computational complexity, and provides reliable data transmission for adaptive modulation and coding of the meteor burst communication system. Computer simulation results and performance analysis are also included to support our developments. Copyright © 2010 John Wiley & Sons, Ltd.