| Presentation | 2011-07-21 Investigation of Interference Rejection Combining Receiver to Suppress Inter-cell Interference in LTE-Advanced Downlink Yusuke OHWATARI, Nobuhiko MIKI, Takahiro ASAI, Tetsushi ABE, Hidekazu TAOKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The interference rejection combining (IRC) receiver is effective in improving the cell-edge user throughput because it suppresses inter-cell interference. The IRC receiver is typically based on the minimum mean square error (MMSE) criteria, which requires channel estimation and covariance matrix estimation including the inter-cell interference with high accuracy. The paper investigates the gain from the IRC receiver taking into account the estimation of the interference signal, i.e., the covariance matrix, in terms of the downlink user throughput performance in a multi-cell environment. For the estimation of the covariance matrix, two estimation schemes are considered one based on data signals and the other based on the demodulation reference signal (DM-RS). The simulation results show that the IRC receiver employing the covariance matrix comprising the interference and noise component estimation improves the cell-edge user throughput (defined as the 5% value in the cumulative distribution function) by approximately 22% compared to the simplified MMSE receiver that approximates the inter-cell interference as AWGN when the inter-site distance is 500 m and the numbers of transmitter and receiver antennas are 2 and 2, respectively. It is also shown that the IRC receiver employing the full covariance matrix estimation degrades the average user throughput due to less accurate channel and covariance matrices. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LTE-Advanced / interference rejection combining / inter-cell interference / covariance matrix estimation |
| Paper # | RCS2011-80 |
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| Committee | RCS |
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| Conference Date | 2011/7/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation of Interference Rejection Combining Receiver to Suppress Inter-cell Interference in LTE-Advanced Downlink |
| Sub Title (in English) | |
| Keyword(1) | LTE-Advanced |
| Keyword(2) | interference rejection combining |
| Keyword(3) | inter-cell interference |
| Keyword(4) | covariance matrix estimation |
| 1st Author's Name | Yusuke OHWATARI |
| 1st Author's Affiliation | NTT DOCOMO, INC.() |
| 2nd Author's Name | Nobuhiko MIKI |
| 2nd Author's Affiliation | NTT DOCOMO, INC. |
| 3rd Author's Name | Takahiro ASAI |
| 3rd Author's Affiliation | NTT DOCOMO, INC. |
| 4th Author's Name | Tetsushi ABE |
| 4th Author's Affiliation | NTT DOCOMO, INC. |
| 5th Author's Name | Hidekazu TAOKA |
| 5th Author's Affiliation | DOCOMO Communication Labs Europe GmbH |
| Date | 2011-07-21 |
| Paper # | RCS2011-80 |
| Volume (vol) | vol.111 |
| Number (no) | 145 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |