| Presentation | 2013-04-18 Investigation on Feedback Information for Interference Rejection Combining Receiver in LTE-Advanced Downlink Yousuke SANO, Yusuke OHWATARI, Yuta SAGAE, Akihito MORIMOTO, Yukihiko OKUMURA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The interference rejection combining (IRC) receiver, which can suppress inter-cell interference, is effective in improving the cell edge user throughput. In LTE/LTE-Advanced, each receiver needs to feed back control information to eNodeB, which is based on measured channel quality, in order to perform adaptive modulation and coding (AMC), user scheduling, and precoding transmission at eNodeB. When appropriate control information for each receiver is not fed back to eNodeB, user throughput may be degraded. This is because the eNodeB performs transmission controls based on the feedback information. Therefore, especially for the IRC receiver, it is necessary to calculate the feedback information based on measurement of reception quality including the effect of interference suppression. Thus, this paper investigates calculating method of the feedback information for the IRC receiver assuming closed-loop transmit diversity/MIMO (multiple-input multiple-output) multiplexing in LTE/LTE-Advanced downlink. The simulation results assuming two transmitter/receiver antenna branches and uncorrelated channel show that the effect of interference suppression for the IRC receiver does not affect the precoding matrix selection when selecting common precoding matrix for transmission bandwidth. Furthermore, even when the IRC receiver that measures the feedback information witht the effect of interference suppression, the user throughput improves compared to the conventional MMSE receiver that cannot suppress the intra-cell interference. However, when comparing the IRC receiver that measures the feedback information without the effect of interference suppression, it is shown that the user throughput improvement degrades due to incorrect feedback information. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LTE-Advanced / interference rejection combining / inter-cell interference / feedback information |
| Paper # | RCS2013-11 |
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| Committee | RCS |
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| Conference Date | 2013/4/11(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 | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation on Feedback Information for Interference Rejection Combining Receiver in LTE-Advanced Downlink |
| Sub Title (in English) | |
| Keyword(1) | LTE-Advanced |
| Keyword(2) | interference rejection combining |
| Keyword(3) | inter-cell interference |
| Keyword(4) | feedback information |
| 1st Author's Name | Yousuke SANO |
| 1st Author's Affiliation | NTT DOCOMO, INC.() |
| 2nd Author's Name | Yusuke OHWATARI |
| 2nd Author's Affiliation | NTT DOCOMO, INC. |
| 3rd Author's Name | Yuta SAGAE |
| 3rd Author's Affiliation | NTT DOCOMO, INC. |
| 4th Author's Name | Akihito MORIMOTO |
| 4th Author's Affiliation | NTT DOCOMO, INC. |
| 5th Author's Name | Yukihiko OKUMURA |
| 5th Author's Affiliation | NTT DOCOMO, INC. |
| Date | 2013-04-18 |
| Paper # | RCS2013-11 |
| Volume (vol) | vol.113 |
| Number (no) | 8 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |