| Presentation | 2014-03-07 A Zero-Forcing Relay Power Allocation Scheme for TDBC-Based Bidirectional Relay Networks Basem M. ElHalawany, Maha Elsabrouty, Adel Abdelrahman, Osamu Muta, Hiroshi Furukawa, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Although the amplify-and-forward (AF) relaying is an effective and simple technique for cooperative communication networks, it introduces a noise enhancement problem into the system. This problem occurs when the effects of interference and the multipath fades are amplified during the transmission from the source to the relay. AF is usually used with the multiple access broadcast (MABC) protocol which is a two phases transmission (2P) analog network coding (ANC) protocol for the half-duplex (HD) communication mode. However, MABC is not designed to utilize the direct link (DL) signal no matter how strong it is. To deal with the noise enhancement problem and improve the system performance, this paper proposes a zero-forcing based relay power allocation (ZF-RPA) scheme to be used with the time division broadcast (TDBC) protocol. The ZF-RPA scheme is used to mitigate the noise enhancement by introducing adaptive ZF gains at the relay node that inverses the channels effects between sources and relay when constructing the signal to be transmitted at the third phase of the TDBC. Analytical results of the ZF-RPA scheme is compared to the traditional variable-gain (VG- RPA) scheme under the same nodes power allocation. Simulation results show that the ZF-RPA is superior for all channel qualities in terms of the outage probability compared to the traditional VG-RPA. The total system sum rate comparison reveals that the ZF-RPA scheme could outperform the VG-RPA scheme as long as the channel qualities of the relay-transceiver links are less than certain threshold. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Power Allocation / Analog Network Coding / TDBC |
| Paper # | CAS2013-117,SIP2013-163,CS2013-130 |
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| Conference Information | |
| Committee | CS |
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| Conference Date | 2014/2/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Communication Systems (CS) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Zero-Forcing Relay Power Allocation Scheme for TDBC-Based Bidirectional Relay Networks |
| Sub Title (in English) | |
| Keyword(1) | Power Allocation |
| Keyword(2) | Analog Network Coding |
| Keyword(3) | TDBC |
| 1st Author's Name | Basem M. ElHalawany |
| 1st Author's Affiliation | Kyushu University:Egypt-Japan University of Science & Technology() |
| 2nd Author's Name | Maha Elsabrouty |
| 2nd Author's Affiliation | Egypt-Japan University of Science & Technology |
| 3rd Author's Name | Adel Abdelrahman |
| 3rd Author's Affiliation | Egypt-Japan University of Science & Technology |
| 4th Author's Name | Osamu Muta |
| 4th Author's Affiliation | Kyushu University |
| 5th Author's Name | Hiroshi Furukawa |
| 5th Author's Affiliation | Kyushu University |
| Date | 2014-03-07 |
| Paper # | CAS2013-117,SIP2013-163,CS2013-130 |
| Volume (vol) | vol.113 |
| Number (no) | 465 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |