Hybrid Decode-Amplify-Forward Cooperative Communications with Multiple Relays
| Document type: | Conference Papers |
|---|---|
| Peer reviewed: | Yes |
| Author(s): | Quang Trung Duong, Hans-Jürgen Zepernick |
| Title: | Hybrid Decode-Amplify-Forward Cooperative Communications with Multiple Relays |
| Conference name: | IEEE Wireless Communications and Networking Conference |
| Year: | 2009 |
| Pagination: | 273-278 |
| ISBN: | 978-1-4244-2947-9 |
| Publisher: | IEEE |
| City: | Budapest |
| ISI number: | 000272057700050 |
| Organization: | Blekinge Institute of Technology |
| Department: | School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling) School of Engineering S- 372 25 Ronneby +46 455 38 50 00 http://www.tek.bth.se/ |
| Language: | English |
| Abstract: | In this paper, we investigate the performance gain of hybrid decode-amplify-forward (HDAF) relay protocol over the two conventional ones: the adaptive decode-forward (ADF) and amplify-forward (AF) in dual-hop multiple-relay networks. We analyze the performance gain in terms of the symbol error probability (SEP) in the high signal-to-noise ratio (SNR) regime. Similarly as in the single relay case [1], under a specific modulation scheme, these gains only depend on the ratio of channel mean power between the first-hop and second-hop transmission. In particular, we show that the HDAF protocol obtains a large gain, medium gain, and small gain over ADF, AF as the relays are placed close to the destination, half-way between the source and destination (symmetric case), and nearby the source, respectively. In contrast to the single-relay case in which the HDAF scheme has no benefit compared to ADF and AF as the relay is located close to the source [1], HDAF still achieves a small gain with multiple relays. Interestingly, we further show that for all cases the performance gains are saturated as the number of relays is large. |
| Subject: | Signal Processing\General |
| Keywords: | WIRELESS NETWORKS, DIVERSITY, PERFORMANCE, PROTOCOLS, CHANNELS |
