초록 ▼

A 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 satelli

A 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.

대표청구항 ▼

[ What is claimed is:] [1.] In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising:a decoder network for decoding said input signal in association

[ What is claimed is:] [1.] In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising:a decoder network for decoding said input signal in association with an error correction decode rate; anda control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; whereinsaid decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal exclusive of error-related communications from said receiver to an associated encoder at a transmitter via a return satellite channel, and from said transmitter to said decoder network.