| Presentation | 2015-06-25 Interference Alignment for Time-varying Channel with Channel and Weight Predictions based on Auto Regressive Model Masayoshi Ozawa, Tomoaki Ohtsuki, Wenjie Jiang, Yasushi Takatori, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In interference alignment (IA), interference signals are aligned in a certain signal subspace of each receiver and eliminated with transmit and receive weights. However, they are not perfectly aligned and remains withthe weights based on time-varying channel. In this report, we propose three IA methods having the capability of adapting to time-varying channel using auto regressive (AR) model by which next state is predicted with past states. In the rst method, the channel when a signal is transmitted at the transmitter is predicted from the estimated channel state information (CSI) at the receiver based on AR model. The weights are calculated with the predicted CSI so that the interference signals are aligned and eliminated. In the second method, transmit and receive weightsare predicted with past transmit and receive weights based on AR model, respectively. In the third method, only the transmit weight is predicted with past transmit weights based on AR model, and receive weight is calculated with the estimated CSI. Compared with an iterative optimization that is one of weight calculation methods, the prediction methods are able to calculate the weights with low calculation amount. Through computer simulation, the proposed ones are shown to improve a rate and decrease the calculation amount compared with general IA methods. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Interference Alignment / Time-varying channel / Channel prediction / Auto regressive model |
| Paper # | RCS2015-72 |
| Date of Issue | 2015-06-17 (RCS) |
| Conference Information | |
| Committee | RCS |
|---|---|
| Conference Date | 2015/6/24(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. |
| Chair | Makoto Taromaru(Fukuoka Univ.) |
| Vice Chair | Hidekazu Murata(Kyoto Univ.) / Satoshi Denno(Okayama Univ.) / Yukitoshi Sanada(Keio Univ.) |
| Secretary | Hidekazu Murata(Mitsubishi Electric) / Satoshi Denno(NTT DoCoMo) / Yukitoshi Sanada |
| Assistant | Jun Mashino(NTT) / Tetsuya Yamamoto(Panasonic) / Takamichi Inoue(NEC) / Tomoya Tandai(Toshiba) / Toshihiko Nishimura(Hokkaido Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Interference Alignment for Time-varying Channel with Channel and Weight Predictions based on Auto Regressive Model |
| Sub Title (in English) | |
| Keyword(1) | Interference Alignment |
| Keyword(2) | Time-varying channel |
| Keyword(3) | Channel prediction |
| Keyword(4) | Auto regressive model |
| 1st Author's Name | Masayoshi Ozawa |
| 1st Author's Affiliation | Keio University(Keio Univ.) |
| 2nd Author's Name | Tomoaki Ohtsuki |
| 2nd Author's Affiliation | Keio University(Keio Univ.) |
| 3rd Author's Name | Wenjie Jiang |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 4th Author's Name | Yasushi Takatori |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| Date | 2015-06-25 |
| Paper # | RCS2015-72 |
| Volume (vol) | vol.115 |
| Number (no) | RCS-113 |
| Page | pp.pp.155-160(RCS), |
| #Pages | 6 |
| Date of Issue | 2015-06-17 (RCS) |