| タイトル | Considerations of digital phase modulation for narrowband satellite mobile communication |
| 本文（外部サイト） | http://hdl.handle.net/2060/19920014925 |
| 著者（英） | Grythe, Knut |
| 著者所属（英） | ELAB-RUNIT |
| 発行日 | 1990-01-01 |
| 言語 | eng |
| 内容記述 | The Inmarsat-M system for mobile satellite communication is specified as a frequency division multiple access (FDMA) system, applying Offset Quadrature Phase Shift Keying (QPSK) for transmitting 8 kbit/sec in 10 kHz user channel bandwidth. We consider Digital Phase Modulation (DPM) as an alternative modulation format for INMARSAT-M. DPM is similar to Continuous Phase Modulation (CPM) except that DPM has a finite memory in the premodular filter with a continuous varying modulation index. It is shown that DPM with 64 states in the VA obtains a lower bit error rate (BER). Results for a 5 kHz system, with the same 8 kbit/sec transmitted bitstream, is also presented. |
| NASA分類 | COMMUNICATIONS AND RADAR |
| レポートNO | 92N24168 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/127279 |
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