| Presentation | 2014-10-17 Performance of Downlink Control Information Signals Using Decision-Feedback Channel Estimation for EPDCCH Shinya Hirayama, Kazuaki Takeda, Yuichi Kakishima, Mamoru Sawahashi, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In Release (Rel.) 11 Long Term Evolution (LTE)-Advanced radio interface, Enhanced Physical Downlink Control Channel (EPDCCH) is specified which transmits downlink control information (DCI) signals. EPDCCH is frequency-domain-multiplexed with the data symbols and transmits larger number of DCI signals compared to Physical Downlink Control Channel (PDCCH) for Rel.8 LTE due to the application of multiuser multiple-input multiple-output (MIMO) and coordinated multi-point (CoMP) transmission and reception. This paper presents the effect of decision-feedback channel estimation (DFCE) using soft-symbol estimation of the DCI signals for EPDCCH. In the proposed DFCE method, channel estimation accuracy is improved by using soft-symbol estimation of the control signals based on the a posteriori log-likelihood ratio (LLR) at the soft output Viterbi algorithm (SOVA) for convolutional coding in addition to the demodulation reference signals (DM-RSs). Computer simulation results show that the DFCE is effective in decreasing the transmission power of the DM-RSs to approximately half compared to that for the conventional DM-RSs only to achieve the same target block error rate from low to high Doppler frequency region in frequency-selective Rayleigh fading channel. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile communications / control signals / OFDMA / decision-feedback channel estimation / MMSE channel estimation / EPDCCH / LTE-Advanced |
| Paper # | RCS2014-191 |
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| Committee | RCS |
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| Conference Date | 2014/10/9(1days) |
| Place (in Japanese) | (See Japanese page) |
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| 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) | Performance of Downlink Control Information Signals Using Decision-Feedback Channel Estimation for EPDCCH |
| Sub Title (in English) | |
| Keyword(1) | Mobile communications |
| Keyword(2) | control signals |
| Keyword(3) | OFDMA |
| Keyword(4) | decision-feedback channel estimation |
| Keyword(5) | MMSE channel estimation |
| Keyword(6) | EPDCCH |
| Keyword(7) | LTE-Advanced |
| 1st Author's Name | Shinya Hirayama |
| 1st Author's Affiliation | Department of Information and Communication Engineering, Tokyo City University() |
| 2nd Author's Name | Kazuaki Takeda |
| 2nd Author's Affiliation | Research Laboratories, NTT DOCOMO, INC. |
| 3rd Author's Name | Yuichi Kakishima |
| 3rd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 4th Author's Name | Mamoru Sawahashi |
| 4th Author's Affiliation | Department of Information and Communication Engineering, Tokyo City University |
| Date | 2014-10-17 |
| Paper # | RCS2014-191 |
| Volume (vol) | vol.114 |
| Number (no) | 254 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |