Relay selection in multiuser two-way cooperative relaying systems

Yi Ju Liao*, Feng-Tsun Chien, Min Kuan Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this paper, we study a relay selection (RS) problem in multi-user two-way cooperative relaying systems. We consider a more practical scenario in which multiple users, multiple relays and a single destination are involved in the two-way network. In this paper, the code division multiple access (CDMA) system with non-orthogonal spreading sequences is employed to handle the multiuser interference. Relay selection based on maximizing the SINR of the worse link is proposed in this research. Besides, aiming at mitigating the interference, we consider the design of linear filter at each relay such that the minimum SINR of the worst link in the two-way transmission is maximized. The result shows that the linear filter is similar to minimum mean-square error (MMSE) detector. Furthermore, we simulate the proposed scheme with several different parameters such as the numbers of users and relays, and the length of spreading sequences. Also, we compare the proposed RS method with random RS approach, and the result shows that our proposed method has better performance in terms of the bit error rate (BER).

Original languageEnglish
Title of host publication2012 Conference Handbook - Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012
StatePublished - 1 Dec 2012
Event2012 4th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012 - Hollywood, CA, United States
Duration: 3 Dec 20126 Dec 2012

Publication series

Name2012 Conference Handbook - Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012

Conference

Conference2012 4th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2012
CountryUnited States
CityHollywood, CA
Period3/12/126/12/12

Keywords

  • multiuser interference
  • Relay selection
  • two-way cooperative relaying system

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