Method and apparatus for selecting a radio channel for transmitting an audio signal to a radio local receiver
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United States of America Patent
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Jul 26, 2011
Grant Date -
Jun 11, 2009
app pub date -
Dec 7, 2007
filing date -
Dec 7, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A transmitter device (100) receives an audio signal from an audio source device (112), and transmits the audio signal at a low power over a commercial broadcast channel to a local receiver (120). The transmitter device selects an initial channel by scanning the available spectrum, partitioned into sub-bands (210-206), and measuring the received signal strength in each channel. The channel having the lowest strength is used to set a threshold. The sub-band with most channels meeting the threshold is initially selected, and the channel in the initially selected sub-band with the lowest received signal strength is selected for initial use. A context-based weighting factor may be applied in selecting the initial channel or in selecting subsequent channels when the initial channel conditions degrade.
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