| タイトル | 16-QAM and trellis-coded 16-QAM on nonlinear channels |
| 著者（英） | Lyons, M. T.; Wilson, S. G.; Chung, H. Y. |
| 著者所属（英） | M/A-COM Linkabit, Inc.|Virginia Univ. |
| 発行日 | 1985-01-01 |
| 言語 | eng |
| 内容記述 | The use of 16-QAM on bandlimited nonlinear satellite channels, in uncoded and trellis-coded form, for bandwidth efficient modulation (ideally 4 bps/Hz) is discussed. To avoid severe degradation due to AM/AM and AM/PM distortion, or to avoid the need for large back-off, predistorting the 16-QAM constellation at the modulator is considered. Performance for varying back-off settings for uncoded and coded 16-QAM is simulated, and it is found that the four-state trellis code has a coding gain of about 8 dB, larger than expected based on linear channel analysis, while the 16-state code gains only marginally beyond this. |
| NASA分類 | COMMUNICATIONS AND RADAR |
| レポートNO | 86A37539 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/384654 |
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