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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Taga, T. |
| Copyright Year | 1998 |
| Description | Author affiliation: NTT Wireless Syst. Lab., Kanagawa, Japan (Taga, T.) |
| Abstract | This paper reports coverage prediction results for 5-GHz-band TDMA mobile communication systems that transmit high-speed digital signals at bit rates of 2 Mb/s to 30 Mb/s in urban microcell environments. The predictions are mainly based on radio propagation characteristics obtained by ray-tracing calculations on an urban line-of-sight street. Based on the predicted propagation loss and delay spread characteristics, bit error rate (BER) characteristics for differential QPSK signals with two- or four-branch maximum ratio combining diversity reception are evaluated. Adaptive beam-facing access (ABFA) is proposed, and its effectiveness in reducing delay spread in microcell environments is evaluated numerically and experimentally. Using ABFA and 2-branch maximum ratio combining (2-MRC) diversity reception, a 2 Mb/s TDMA signal can be transmitted with 95% area coverage (600 m range from base site) with the BER performance of better than 10/sup -5/. Similarly, using ABPA and 4-MRC, a 25 Mb/s TDMA signal can be transmitted with the same signal quality over 100 m range from base site. |
| Starting Page | 596 |
| Ending Page | 600 |
| File Size | 500991 |
| Page Count | 5 |
| File Format | |
| ISBN | 0780343204 |
| ISSN | 10903038 |
| DOI | 10.1109/VETEC.1998.686644 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1998-05-21 |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Diversity reception Time division multiple access Bit error rate Microcell networks Mobile communication Bit rate Radio propagation Ray tracing Propagation losses Propagation delay |
| Content Type | Text |
| Resource Type | Article |
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