| Presentation | 2007-05-18 Field Experiments on 50 Bit/Sec/Hz Frequency Efficiency Using MLD Signal Detection in MIMO-OFDM Broadband Packet Radio Access Hidekazu Taoka, Kenichi Higuchi, Mamoru Sawahasi, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents the achievement of the peak throughput of 4.92 Gbps in a 100-MHz channel bandwidth, i.e., the frequency efficiency of approximately 50 bit/sec/Hz, based on indoor and field experiments in the downlink OFDM radio access. We show based on a system-level simulation that the maximum average received signal-to-interference plus noise power ratio (SINR) is approximately 30 dB near the cell site even with a light channel load considering other-cell interference in a cellular environment. In the experiments, we apply 12-by-12 MIMO multiplexing using the Maximum Likelihood Detection employing QR docomposition and the M-algorithm (QRM-MLD) with adaptive selection of the surviving symbol replica candidates (ASESS), 64QAM data modulation, and Turbo coding with the coding rate of R=8/9. In the field experiments conducted in the Yokosuka Research Park (YRP) district of Yokosuka city, we show that the measured peak throughput of 4.92 Gbps is achieved at the average received SNR per receiver antenna of approximately 28.0 and 28.5 dB when the receiver antenna spacing is 20 cm (3.1λ) and 10 cm (1.5λ), respectively, at the average speed of 10 km/h of a mobile station. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | downlink / OFDM / MIMO / MLD / QR decomposition / adaptive selection of surviving symbol replica candidates |
| Paper # | RCS2007-10 |
| Date of Issue |
| Conference Information | |
| Committee | RCS |
|---|---|
| Conference Date | 2007/5/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Field Experiments on 50 Bit/Sec/Hz Frequency Efficiency Using MLD Signal Detection in MIMO-OFDM Broadband Packet Radio Access |
| Sub Title (in English) | |
| Keyword(1) | downlink |
| Keyword(2) | OFDM |
| Keyword(3) | MIMO |
| Keyword(4) | MLD |
| Keyword(5) | QR decomposition |
| Keyword(6) | adaptive selection of surviving symbol replica candidates |
| 1st Author's Name | Hidekazu Taoka |
| 1st Author's Affiliation | Radio Access Network Development Department, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Kenichi Higuchi |
| 2nd Author's Affiliation | Department of Science and Engineering, Tokyo University of Science |
| 3rd Author's Name | Mamoru Sawahasi |
| 3rd Author's Affiliation | Department of Knowledge Engineering, Musashi Institute of Technology |
| Date | 2007-05-18 |
| Paper # | RCS2007-10 |
| Volume (vol) | vol.107 |
| Number (no) | 38 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |