| Presentation | 2019-10-24 A Study on Interference Mitigation Considering Pilot Overhead in TDD Massive MIMO Heterogeneous Networks Shunsuke Kamiwatari, Osamu Muta, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a two-tier heterogeneous network (HetNet) , mitigation of interference between the MC and SC (i.e., cross-tier interference) is an important issue, where macro cell (MC) and small cell (SC) use the same time/frequency resources. The authors have proposed to estimate cross-channel state information between macro base station (MBS) and small cell users (SUs) by using uplink pilots and optimizing the precoding weights at MBS so as to mitigate interference from MBS to SU. However, in the above work, cross-tier interference mitigation from small-cell base station (SBS) to macro users (MUs) is not taken into consideration. In this paper, we propose a cross-tier interference mitigation scheme that coordinates not only cross-tier interference from MBS to SU but also that from SBS to MU in time division duplex (TDD) based two-tier HetNet where massive multi-input multi-output (mMIMO) is equipped at MBS. In this scheme, cross-tier interference can be mitigated without increasing the pilot overhead in comparison with the conventional scheme. Simulation results show that the proposed scheme is effective in improving downlink sum-rate. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | two-tier heterogeneous network / massive MIMO / orthogonal pilot / pilot overhead |
| Paper # | RCS2019-183 |
| Date of Issue | 2019-10-17 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2019/10/24(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | YRP Yokosuka Research Park |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. |
| Chair | Tomoaki Otsuki(Keio Univ.) |
| Vice Chair | Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) |
| Secretary | Satoshi Suyama(NTT) / Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura |
| Assistant | Kazushi Muraoka(NTT DOCOMO) / Shinsuke Ibi(Doshisha Univ.) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Interference Mitigation Considering Pilot Overhead in TDD Massive MIMO Heterogeneous Networks |
| Sub Title (in English) | |
| Keyword(1) | two-tier heterogeneous network |
| Keyword(2) | massive MIMO |
| Keyword(3) | orthogonal pilot |
| Keyword(4) | pilot overhead |
| 1st Author's Name | Shunsuke Kamiwatari |
| 1st Author's Affiliation | Kyushu University(Kyushu Univ.) |
| 2nd Author's Name | Osamu Muta |
| 2nd Author's Affiliation | Kyushu University(Kyushu Univ.) |
| Date | 2019-10-24 |
| Paper # | RCS2019-183 |
| Volume (vol) | vol.119 |
| Number (no) | RCS-244 |
| Page | pp.pp.31-36(RCS), |
| #Pages | 6 |
| Date of Issue | 2019-10-17 (RCS) |