Auto-detection of broadcast channel spacing
First Claim
1. A method for auto-detection of channel spacings for AM broadcast bands, comprising:
- scanning a plurality of possible channels for a plurality of AM broadcast bands, each AM broadcast band having a different channel spacing and representing a different geographic region;
determining receive signal information for the plurality of possible channels;
analyzing the receive signal information;
automatically selecting a channel spacing representing a selected AM broadcast band from the plurality of AM broadcast bands based upon the analyzed receive signal information; and
subsequently using the selected channel spacing to search for channels within the selected AM broadcast band.
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Abstract
Methods and systems are disclosed for automatic detection of channel spacing for broadcast bands in different regions that use different channel spacing. Using the described embodiments, channel spacing at a users'"'"' current location can be automatically detected so that manual settings by the user are not necessary, especially when a user travels with his/her radio across regions that use different channel spacing for radio broadcasting bands. This auto-detected channel spacing can then be used for later channel searching by the radio. More particularly, methods and systems are disclosed for auto-detection of channel spacing for AM broadcasts using different channel spacings, such as the standard 9 kHz and 10 kHz spacings, used today in different geographic regions of the world for AM broadcast bands.
36 Citations
24 Claims
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1. A method for auto-detection of channel spacings for AM broadcast bands, comprising:
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scanning a plurality of possible channels for a plurality of AM broadcast bands, each AM broadcast band having a different channel spacing and representing a different geographic region; determining receive signal information for the plurality of possible channels; analyzing the receive signal information; automatically selecting a channel spacing representing a selected AM broadcast band from the plurality of AM broadcast bands based upon the analyzed receive signal information; and subsequently using the selected channel spacing to search for channels within the selected AM broadcast band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for auto-detection of channel spacings for broadcast bands, comprising:
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scanning a plurality of possible channels for a plurality of broadcast bands, each broadcast band having a different channel spacing and representing a different geographic region and each broadcast band at least in part overlapping each other broadcast band; determining receive signal information for the plurality of possible channels; analyzing the receive signal information; automatically selecting a channel spacing representing a selected broadcast band from the plurality of broadcast bands based upon the analyzed receive signal information; and subsequently using the selected channel spacing to search for channels within the selected broadcast band. - View Dependent Claims (15, 16, 17, 24)
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18. An AM receiver system having auto-detection of channel spacing for AM broadcast bands, comprising:
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an AM receiver configured to be tuned to receive channels within a plurality of different AM broadcast bands in a plurality of geographic regions with each AM broadcast band having a different channel spacing, to determine receive signal information for received channels, and to receive scan control input signals; a host system coupled to the AM receiver and configured to provide the scan control signals to the AM receive and to use the scan control signals to control the AM receiver to scan a plurality of possible channels for the plurality of AM broadcast bands, the host system being further configured to obtain receive signal information for the plurality of possible channels from the AM receiver, to analyze the receive signal information, to select a channel spacing representing a selected AM broadcast band from the plurality of AM broadcast bands based upon the analyzed receive signal information, and subsequently to use the selected channel spacing to control the AM receiver for subsequent channel scanning within the selected AM broadcast band. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification