| Presentation | 2013-02-27 Hermitian Splitting Precoding (HSP) for Wireless MIVIO Systems : All The Channel Capacity, Half The Signaling Cost Oussama SOUIHLI, Yasuyuki HATAKAWA, Satoshi KONISHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In wireless MIMO systems, capacity-achieving precoding schemes, be they linear (e.g. Singular-Value-Decomposition (SVD) based transmit beamforming) or not (e.g. Tomlinson-Harashima Precoding, THP) necessitate full channel state information (CSI) at the transmitter, thereby requiring the entire channel gain matrix to be fed back from the receiver to the transmitter (in what is known as Closed-Loop MIMO). Contrarily, schemes that do not require such a feedback (Open-Loop MIMO) tend to perform poorly in MIMO systems when the number of antennas is large. One such Open-Loop scheme is QR-based Decision Feedback Equalizer (QR-DFE). In the MIMO Digital Subscriber Lines (DSL) literature, QR-DFE is known to be optimal whenever the channel matrix is diagonally-dominant, a property that holds true in coupled DSL cables. Alas, unlike the MIMO DSL channel, the wireless MIMO channel does not exhibit diagonal dominance. In this work, we propose a joint transmit-and-receive precoding scheme whereby the MIMO channel matrix is transformed into a diagonally-dominant form, thereby making QR-DFE optimal. The proposed transmit precoder is based upon a skew-Hermitian matrix, which has to be fed back from the receiver. Owing to the symmetric nature of such matrix, the CSI feedback signaling cost of the proposed scheme is nearly half the cost of conventional capacity-achieving Closed-Loop schemes. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Wireless Communications / Closed-Loop MIMO / Massive MIMO / CSI Feedback / Interference |
| Paper # | RCS2012-288 |
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| Committee | RCS |
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| Conference Date | 2013/2/20(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Radio Communication Systems (RCS) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Hermitian Splitting Precoding (HSP) for Wireless MIVIO Systems : All The Channel Capacity, Half The Signaling Cost |
| Sub Title (in English) | |
| Keyword(1) | Wireless Communications |
| Keyword(2) | Closed-Loop MIMO |
| Keyword(3) | Massive MIMO |
| Keyword(4) | CSI Feedback |
| Keyword(5) | Interference |
| 1st Author's Name | Oussama SOUIHLI |
| 1st Author's Affiliation | Wireless Communication System Laboratory (WCSL), KDDI R&D Labs() |
| 2nd Author's Name | Yasuyuki HATAKAWA |
| 2nd Author's Affiliation | Wireless Communication System Laboratory (WCSL), KDDI R&D Labs |
| 3rd Author's Name | Satoshi KONISHI |
| 3rd Author's Affiliation | Wireless Communication System Laboratory (WCSL), KDDI R&D Labs |
| Date | 2013-02-27 |
| Paper # | RCS2012-288 |
| Volume (vol) | vol.112 |
| Number (no) | 443 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |