MIMO two-way relaying: a comparison of beamforming and antenna selection

Nan Yang*, Phee Lep Yeoh, Maged Elkashlan, Iain B. Collings

*Corresponding author for this work

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


We propose and analyze two MIMO protocols with analog network coding (ANC) in two-way amplify-and-forward (AF) relaying where multi-antenna nodes communicate via a single antenna relay. Specifically, we present a new framework for the comparative analysis of beamforming and antenna selection in two-way relaying with non-identical Rayleigh fading between the hops. To facilitate the comparison, we derive new closed-form expressions for the exact and asymptotic sum symbol error rate (SSER). We show that beamforming and antenna selection offer the same diversity order of min{NA, NB}, where Nand Nare the number of antennas at the two nodes. We proceed to characterize the fundamental difference between the two protocols in terms of their array gains. A pivotal conclusion is reached that when either of the two nodes is equipped with a single antenna, antenna selection provides identical performance to beamforming at medium and high signal-to-noise ratios without the added hardware and signaling overhead.

Original languageEnglish
Title of host publication2012 IEEE Vehicular Technology Conference (VTC Fall)
Subtitle of host publicationproceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
ISBN (Electronic)9781467318815
ISBN (Print)9781467318808
Publication statusPublished - 2012
Externally publishedYes
Event2012 IEEE 76th Vehicular Technology Conference: VTC2012-Fall - Quebec City, Canada
Duration: 3 Sept 20126 Sept 2012
Conference number: 76th


Other2012 IEEE 76th Vehicular Technology Conference
CityQuebec City


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