| Presentation | 2009-07-16 Cooperative Diversity Can Mitigate Keyhole Effects in Wireless MIMO Systems Oussama SOUIHLI, Tomoaki OHTSUKI, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A MIMO keyhole is a propagation environment such that the channel gain matrix has unit rank (single degree of freedom), irrespective of the number of deployed antennas or their correlations (spacing), thereby reducing the MIMO channel capacity to that of a SISO channel. Related literature seems to consider such degeneration hopeless. Contrary to this general belief, this report demonstrates that cooperative diversity can mitigate keyhole effects. Precisely, provided that the source-relay channel is keyhole-free, we show that there exists a "cutoff" relay transmit power above which keyhole effects can be mitigated even when both the source-destination and the relay-destination channels incur keyhole effect. We explicit the closed form of this power threshold as function of the source transmit power and the channel matrices brought into play in the relay channel. Numerical examples confirm the relevance of our claim. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Relay Networks / Cooperative Communications / MIMO Communications / Channel Capacity / Network Information Theory |
| Paper # | RCS2009-53 |
| Date of Issue |
| Conference Information | |
| Committee | RCS |
|---|---|
| Conference Date | 2009/7/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
|---|---|
| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Cooperative Diversity Can Mitigate Keyhole Effects in Wireless MIMO Systems |
| Sub Title (in English) | |
| Keyword(1) | Relay Networks |
| Keyword(2) | Cooperative Communications |
| Keyword(3) | MIMO Communications |
| Keyword(4) | Channel Capacity |
| Keyword(5) | Network Information Theory |
| 1st Author's Name | Oussama SOUIHLI |
| 1st Author's Affiliation | Department of Information and Computer Sciences, Keio University() |
| 2nd Author's Name | Tomoaki OHTSUKI |
| 2nd Author's Affiliation | Department of Information and Computer Sciences, Keio University |
| Date | 2009-07-16 |
| Paper # | RCS2009-53 |
| Volume (vol) | vol.109 |
| Number (no) | 130 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |