Stop-on-station method and apparatus
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United States of America Patent
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Apr 18, 2006
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N/A
app pub date -
Dec 5, 2002
filing date -
Dec 5, 2002
priority date (Note) -
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Abstract
A method for stopping on a radio station includes calculating a radio signal quality (205) using a multipath echo indicator and determining if the radio signal quality is greater than a predetermined signal quality threshold (210). A zero crossings indicator of a demodulated signal may be used (225) to reduce a false alarm rate. An apparatus includes an antenna (105), a local oscillator (110) coupled to the antenna, an analog-to-digital converter circuit (115) coupled to the local oscillator, a demodulator circuit (120) coupled to the analog-to-digital converter circuit, a signal strength determining circuit (125) coupled to the analog-to-digital converter circuit, a logarithmic circuit (150) coupled to the signal strength determining circuit, a multipath echo bandpass filter (155) coupled to the logarithmic circuit, and a stop-on-station circuit (145) coupled to the demodulator circuit, the multipath echo bandpass filter, and the logarithmic circuit.
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