Abstract
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 NA and NB are 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 language | English |
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| Title of host publication | 2012 IEEE Vehicular Technology Conference (VTC Fall) |
| Subtitle of host publication | proceedings |
| Place of Publication | Piscataway, NJ |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Number of pages | 5 |
| ISBN (Electronic) | 9781467318815 |
| ISBN (Print) | 9781467318808 |
| DOIs | |
| Publication status | Published - 2012 |
| Externally published | Yes |
| Event | 2012 IEEE 76th Vehicular Technology Conference: VTC2012-Fall - Quebec City, Canada Duration: 3 Sep 2012 → 6 Sep 2012 Conference number: 76th |
Other
| Other | 2012 IEEE 76th Vehicular Technology Conference |
|---|---|
| Country | Canada |
| City | Quebec City |
| Period | 3/09/12 → 6/09/12 |