基于Alamouti空时码的网络编码协作技术的研究.doc

文档介绍：
基于 Alamouti 空时码的网络编码协作技术
的研究
李万臣,鄂颖*
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10
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35
( 哈尔滨工程大学信息与通信学院,哈尔滨市,150001;)
摘要:随着对通信可靠性要求的不断提高,协作通信技术已经被证明是一种解决无线信道衰
落的有效手段。文中提出了一种基于 Alamouti 正交空时码的网络编码协作通信技术,该技
术是将 Alamouti 正交空时码和网络编码技术应用到固定中继的协作通信中。仿真结果表明:
该技术可以克服无线信道衰落,提高系统性能。相对于直接传输来说,在系统发射功率和带
宽不变的条件下,可以获得可观的编码增益和分集增益。
关键词:线性网络编码; Alamouti 空时码;协同通信;编码增益
中图分类号:
Research work Coding Cooperative Technique Based
on Alamouti Space-Time Code
LI Wanchen, E Ying
(College of Information munication Engineering,Harbin Engineering University,Harbin
150001)
Abstract: With the increasing demand of munications on move, cooperative
communications has proved to be an efficient solution to reduce the effects of unreliable nature of
wireless channel. work-Coding Cooperative Technique Based on Alamouti Space-Time Code is
proposed . This technology is the Alamouti orthogonal space-time codes work coding
technology applied to the fixed-relay munication. The simulation result show that The
technology can improve system performance to e wireless channel fading, Compared to
traditional direct transmission, the system transmit power and bandwidth under the same conditions,
the new scheme leads to a better diversity gain work coding gain.
Key words: work coding; Alamouti Space-Time Code ; munication; network
coding gain
0 引言
协作分集技术是用户间相互帮助,克服无线信道衰落,可将网络中的闲置资源充分利用,
得到空间分集增益[1-2]。目前,协作方式 AF、D