| 摘要 |
In a satellite mobile telecommunication system, TDMF traffic is transmitted from a SAN 1 via a satellite 3 to a mobile user terminal UT1, over a duplex link 1, 2. The SAN 1 instructs the satellite 3a to transmit signals over link 1 to UT 1 at a power level dependent upon the quality of signal received by UT 1, so as to adaptively control the power to an efficient level. Similarly, the power level of signals transmitted by UT 1 to the satellite is controlled depending on the error rate. The power level required is computed as a function of the average of measured areas determined during a given measurement period together with a margin which is computed as an adaptive function of a deviation of the errors about the average value. <IMAGE> |
