| 摘要 |
PCT No. PCT/US93/11338 Sec. 371 Date May 8, 1996 Sec. 102(e) Date May 8, 1996 PCT Filed Nov. 22, 1993 PCT Pub. No. WO95/15033 PCT Pub. Date Jun. 1, 1995A satellite signal receiver includes an input demodulator followed by a Viterbi decoder and a Reed-Solomon decoder. A received signal is encoded with information including error-representative information, and exhibits an error correction code rate which is a function of the power level of a satellite transmitted signal. The demodulator produces control signals representing the presence or absence of synchronism with the received signal, and signal quality (e.g., signal-to-noise ratio). The Reed-Solomon decoder produces a control signal indicating whether or not error detection and correction is occurring properly. These control signals are sensed by a control network to change the code rate of the Viterbi decoder if necessary.
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