| 講演名 | 2013-02-27 Hermitian Splitting Precoding (HSP) for Wireless MIVIO Systems : All The Channel Capacity, Half The Signaling Cost , |
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| 抄録(英) | 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. |
| キーワード(和) | |
| キーワード(英) | Wireless Communications / Closed-Loop MIMO / Massive MIMO / CSI Feedback / Interference |
| 資料番号 | RCS2012-288 |
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| 研究会情報 | |
| 研究会 | RCS |
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| 開催期間 | 2013/2/20(から1日開催) |
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| 申込み研究会 | Radio Communication Systems (RCS) |
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| 本文の言語 | ENG |
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| タイトル（英） | Hermitian Splitting Precoding (HSP) for Wireless MIVIO Systems : All The Channel Capacity, Half The Signaling Cost |
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| キーワード(1)（和/英） | / Wireless Communications |
| 第 1 著者 氏名（和/英） | / Oussama SOUIHLI |
| 第 1 著者 所属（和/英） | Wireless Communication System Laboratory (WCSL), KDDI R&D Labs |
| 発表年月日 | 2013-02-27 |
| 資料番号 | RCS2012-288 |
| 巻番号（vol） | vol.112 |
| 号番号（no） | 443 |
| ページ範囲 | pp.- |
| ページ数 | 6 |
| 発行日 | |