摘要
为进一步提高无线中继网络的信息传输速率,提出了一种基于复数域网络编码的有效下行传输方案。不同于传统的信息传输方案,该方案采用时间维复数域网络编码,中继节点对接收到的多个时隙的信源符号进行复数域网络编码并将编码符号同时发送给用户节点;用户节点接收到所有中继节点的编码符号,采用联合最大似然多用户检测恢复信源符号。性能分析和仿真结果表明,该方案的符号错误概率明显低于传统中继传输方案,且能获得更高的信息传输速率和网络吞吐量。
To further improve information transmission rate of wireless relay networks, an efficient downlink transmission scheme based on complex field network coding is proposed in this paper. Specifically, different from traditional information transmission scheme, the proposed downlink transmission scheme employs complex field network coding of time dimension, and each relay encodes the source symbols of multiple time slots received by complex field network coding, and transmits the encoded symbols to destinations simultaneously. Based on the data received from multiple relays, joint maximum likelihood multiuser detection is adopted at destinations to achieve the source symbols. Performance analysis and simulation results show that the symbol error probability （SEP） of the downlink transmission scheme is much less than the conventional relay transmission scheme. Moreover, the scheme can obtain higher information transmission rate and network throughput.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2015年第1期33-38,共6页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(61040005
61001126
61271262)
中国博士后科学基金(20110491638
2012T50789)
陕西省自然科学基金(2014JQ8300)
国家级大学生创新创业训练计划(201310710034)
关键词
复数域网络编码
下行传输
网络吞吐量
符号错误概率
无线中继网络
complex field network coding
downlink transmission
network throughput
symbol error probability
wireless relay network
