| Presentation | 2009-10-23 Performance of Cooperative HARQ with Relay Selection that Exploits Inter-relay Opportunistic Listening Nandar LYNN, Osamu TAKYU, Koichi ADACHI, Masao NAKAGAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we present a practically feasible cooperative HARQ with relay selection that exploits inter-relay transmissions. We first introduced this scheme in our previous report [8]. In [8], we derived theoretical expressions for error-rate performance of the system and analytical results were verified by the simulated results. In this report, we provide further results from [8]; such as performance comparisons with the existing related schemes and performance with different relay positions. In the system under consideration, the source node is located beyond the coverage of the destination node. The relay nodes assist to establish a communication link between the source and the destination. Therefore, the end-to-end transmission channel has two independent parts: source-relay and relay-destination channel. Among the relays that receive the signal from the source correctly, the one whose relay-destination channel has the largest channel gain transmits to the destination. We employ a low overhead distributed relay selection technique. Exploiting the broadcast nature of the wireless channel, the relays with errors can opportunistically listen (OL) to the transmitted signal from a relay without error to combine with their erroneous received signals. Consequently, these relay nodes originally with erroneous received signals may be able to decode the signals successfully due to the obtained spatial diversity. This results in the increase in degree of freedom in relay selection for retransmission by ARQ in relay-destination channel. Thus the relay node selected for retransmission may be different from that selected for initial relay transmission, achieving spatial diversity gain. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | cooperative HARQ / opportunistic listening / spatial diversity / relay selection |
| Paper # | SR2009-63,AN2009-33,USN2009-36 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2009/10/15(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Software Radio(SR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance of Cooperative HARQ with Relay Selection that Exploits Inter-relay Opportunistic Listening |
| Sub Title (in English) | |
| Keyword(1) | cooperative HARQ |
| Keyword(2) | opportunistic listening |
| Keyword(3) | spatial diversity |
| Keyword(4) | relay selection |
| 1st Author's Name | Nandar LYNN |
| 1st Author's Affiliation | School for Open and Environmental Systems, Graduate School of Science and Technology, Keio University() |
| 2nd Author's Name | Osamu TAKYU |
| 2nd Author's Affiliation | Dept. of Electrical Engineering, Tokyo University of Science |
| 3rd Author's Name | Koichi ADACHI |
| 3rd Author's Affiliation | School for Open and Environmental Systems, Graduate School of Science and Technology, Keio University |
| 4th Author's Name | Masao NAKAGAWA |
| 4th Author's Affiliation | School for Open and Environmental Systems, Graduate School of Science and Technology, Keio University |
| Date | 2009-10-23 |
| Paper # | SR2009-63,AN2009-33,USN2009-36 |
| Volume (vol) | vol.109 |
| Number (no) | 246 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |