Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2011-07-26
2011-07-26
Dao, Minh D (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S003060, C455S003040, C455S067110, C340S870030, C701S117000
Reexamination Certificate
active
07986928
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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Christopher Gary L.
Kindinger Peter A.
Rokusek Daniel S.
Vanyek David A.
Weirich Kevin L.
Chen Sylvia
Dao Minh D
Garrett Scott M.
Motorola Mobility, Inc.
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