中国邮电高校学报(英文) ›› 2016, Vol. 23 ›› Issue (3): 45-50.doi:

• Wireless • 上一篇    下一篇

Interference Cancellation Scheme Using Codeword Space Alignment over three-user Y Channel

杨冬,田心记   

  1. 河南理工大学
  • 收稿日期:2015-10-21 修回日期:2016-01-13 出版日期:2016-06-28 发布日期:2016-07-05
  • 通讯作者: 田心记 E-mail:tian215216@sohu.com
  • 基金资助:

    基于Ethernet和WSN的矿井监控与应急通信技术研究

Interference Cancellation Scheme Using Codeword Space Alignment over three-user Y Channel

  • Received:2015-10-21 Revised:2016-01-13 Online:2016-06-28 Published:2016-07-05
  • Contact: Xin-Ji TIAN E-mail:tian215216@sohu.com

摘要:

We investigate how to cancel interference by using space time code and codeword space alignment for MIMO Y channel consisting of three users and a relay. All the nodes adopt Alamouti code. During the multiple access stage, two codewords within each reciprocal codeword pair are aligned through pre-coding. The relay decodes the elements of each codeword pair using the orthogonal property of effective channel matrix of Alamouti codeword. During the broadcast stage, the interference between codeword pairs at each user is eliminated by the orthogonal property of effective channel matrix of Alamouti codeword, instead of the interference alignment pre-coding. Thus, channel state information is not required during the broadcast stage, which greatly reduce the amount of feedback.

关键词:

feedback amount

Abstract:

We investigate how to cancel interference by using space time code and codeword space alignment for MIMO Y channel consisting of three users and a relay. All the nodes adopt Alamouti code. During the multiple access stage, two codewords within each reciprocal codeword pair are aligned through pre-coding. The relay decodes the elements of each codeword pair using the orthogonal property of effective channel matrix of Alamouti codeword. During the broadcast stage, the interference between codeword pairs at each user is eliminated by the orthogonal property of effective channel matrix of Alamouti codeword, instead of the interference alignment pre-coding. Thus, channel state information is not required during the broadcast stage, which greatly reduce the amount of feedback.

Key words:

feedback amount