SYSTEM AND METHOD FOR SELECTING A FREQUENCY FOR PERSONAL-USE FM TRANSMISSION
First Claim
1. A portable electronic device, comprising:
- a radio frequency receiver;
a radio frequency transmitter for transmitting audio information to an external audio system; and
a processing system coupled with the radio frequency receiver and the radio frequency transmitter, the processing system for directing the receiver to scan for available radio channels over which the transmitter can transmit the audio information,wherein the processing system selects an available radio channel as the radio channel best suited for use by the radio frequency transmitter to transmit information to the external audio system.
1 Assignment
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Accused Products
Abstract
A portable electronic device includes a radio frequency receiver; a radio frequency transmitter; and a processing system coupled with the receiver and transmitter. The processing system directs the receiver to scan a radio frequency spectrum for available radio channels over which the transmitter may transmit. The processing system may further direct the receiver to perform a second scan for radio channels which are actively transmitting information. The processing system then selects an available radio channel as the radio channel best suited for use by the transmitter to transmit information to the external audio system. The processing system may select a transmission frequency which is spectrally distant from the active radio channels and/or may take into account a transmission profile of the transmitter to select a frequency that does not interfere with the reception of incoming radio signals.
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Citations
24 Claims
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1. A portable electronic device, comprising:
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a radio frequency receiver; a radio frequency transmitter for transmitting audio information to an external audio system; and a processing system coupled with the radio frequency receiver and the radio frequency transmitter, the processing system for directing the receiver to scan for available radio channels over which the transmitter can transmit the audio information, wherein the processing system selects an available radio channel as the radio channel best suited for use by the radio frequency transmitter to transmit information to the external audio system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A navigation device, comprising:
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a receiver for receiving traffic information transmitted from an external traffic information broadcaster; a transmitter for transmitting audio information to an external audio system so the audio information may be audibly reproduced by the external audio system; and a processing system coupled with the receiver and the transmitter, the processing system for directing the receiver to scan for available radio channels over which the transmitter can transmit the audio information, wherein the processing system selects one of the available radio channels as the radio channel best suited for use by the radio frequency transmitter to transmit information to the external audio system. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of transmitting information between a portable electronic device and an external audio system, the portable electronic device including a receiver and a transmitter, comprising:
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causing the receiver to scan for currently unused radio channels; selecting one of the currently unused radio channels; and causing the transmitter to transmit the information from the portable electronic device to the external audio system using the selected radio channel. - View Dependent Claims (18, 19)
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20. A portable electronic device, comprising:
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a radio frequency transmitter for transmitting audio information to an external audio system; and a processing system coupled with the radio frequency transmitter for accessing a memory listing available radio channels over which to transmit, wherein the processing system selects which of the available radio channels should be used by the radio frequency transmitter to transmit the audio information to the external audio system. - View Dependent Claims (21, 22, 23)
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24. A portable electronic device, comprising:
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means for receiving radio frequency transmissions; means for transmitting audio information to an external audio system; and means coupled with the receiving means and the transmitting means for directing the receiving means to scan for available radio channels over which the transmitting means can transmit the audio information, wherein the directing means selects an available radio channel as the radio channel best suited for use by the transmitting means to transmit information to the external audio system.
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Specification