Automatic adjustment of receiver apparatus based on channel-bit-error-rate-affected parameter measurement
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United States of America Patent
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Oct 31, 1995
Issued Date -
N/A
app pub date -
Jan 12, 1994
filing date -
Jul 10, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Alignment of an antenna and a polarizer for the antenna are automatically adjusted and the frequency setting of a frequency-tunable receiver is automatically adjusted while receiving a broadcast communication signal that is forward-error-correction coded by processing the forward-error-correction code of the received signal to measure a channel-bit-error-rate-affected parameter for the received signal; by realigning the antenna and the polarizer from their respective initial positions in response to the measured parameter until the measured parameter is minimized; and by retuning the receiver from its initial frequency setting in response to the measured parameter until the measured parameter is minimized. A Viterbi decoder processes the forward-error-correction code of the received signal to compute path metrics affected by the bit-error rate of the received signal and normalizes the computed path metrics; and a counter counts the normalizations over fixed intervals to measure a path metric normalization rate as the measured parameter.
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