標題: | PERFORMANCE OF FAST FH MFSK SIGNALS IN JAMMED BINARY CHANNELS |
作者: | SU, YT CHANG, RC 電信工程研究所 友訊交大聯合研發中心 Institute of Communications Engineering D Link NCTU Joint Res Ctr |
公開日期: | 1-七月-1994 |
摘要: | Soft-decision decoded performance of fast frequency-hopped (FH) M-ary FSK signals over partial band noise jammed binary channels is studied. The effects of metrics conversion, quantization, and the presence of regenerative nodes on the system's cutoff rate performance are investigated. It is found that the conversion from an M-ary metric to a binary one suffers only negligible degradations. For communication links without regenerative nodes, as expected, the infinite-bit soft-decision is the optimal metric, followed by finite-bit soft decision and then hard-decision. For those with regenerative nodes, however, the infinite-bit soft-decision is outperformed by the hard-decision, but the finite-bit soft-decision decoder still keeps its edge over the latter. The issue concerning the order of metric conversion and diversity combining is also analyzed. Numerical results indicate that the conclusion obtained by an earlier simulation report addressing a similar design alternative in fading channels is valid for jammed binary channels, as well. That is, the precombining metric conversion technique gives up only minor performance degradations when compared to the more sophisticated postcombining metric conversion technique. |
URI: | http://dx.doi.org/10.1109/26.297850 http://hdl.handle.net/11536/2416 |
ISSN: | 0090-6778 |
DOI: | 10.1109/26.297850 |
期刊: | IEEE TRANSACTIONS ON COMMUNICATIONS |
Volume: | 42 |
Issue: | 7 |
起始頁: | 2414 |
結束頁: | 2422 |
顯示於類別: | 期刊論文 |