Configuration of overhead channels in a mixed bandwidth system
First Claim
1. A receiver operable in at least one of a multi-carrier mode in a multi-carrier system and a single carrier mode in a single carrier system, comprising:
- an antenna that receives a forward link signal;
a first subsystem, coupled to the antenna, configured to down convert and demodulate a first component of the forward link signal at a first carrier frequency to generate a first demodulated component of the forward link signal, wherein the first carrier frequency corresponds to a first preferred channel of a selected set of preferred channels that includes a pilot signal; and
a second subsystem, coupled to the antenna, configured to down convert and demodulate a second component of the forward link signal at a second carrier frequency to generate a second demodulated component of the forward link signal, wherein the second carrier frequency corresponds to a second preferred channel of the selected set of preferred channels; and
a processor that instructs the first subsystem to tune to the first preferred channel at the first carrier frequency, and attempts to detect a pilot signal on the first preferred channel, wherein if the pilot signal is detected on the first preferred channel the receiver receives a sync channel message, and wherein if the pilot signal is not detected on the first preferred channel, the processor instructs the second subsystem to tune to the second preferred channel at the second carrier frequency of the selected set of preferred channels.
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Abstract
A method and apparatus for transmitting broadcast information in a multi-carrier communication system. The Sync Channel of the multi-carrier system is transmitted a 1.25 MHz channel bandwidth (i.e., over a single carrier), and to specify the preferred channels for the Sync Channel transmission instead of the preferred channels for the entire multi-carrier system. The Sync Channel Message will carry additional information indicating the center frequency of a multi-carrier system within a reserved set of frequency bands and indicating the frequency of a single carrier system in the reserved set of frequency bands. Considering the A block of the PCS band again, the preferred channels for Sync Channel transmission can be selected as channels 75, 150 and 225. This selection ensures that one of the preferred channels will always be used by any multi-carrier system regardless of the location of its center channel.
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Citations
26 Claims
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1. A receiver operable in at least one of a multi-carrier mode in a multi-carrier system and a single carrier mode in a single carrier system, comprising:
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an antenna that receives a forward link signal;
a first subsystem, coupled to the antenna, configured to down convert and demodulate a first component of the forward link signal at a first carrier frequency to generate a first demodulated component of the forward link signal, wherein the first carrier frequency corresponds to a first preferred channel of a selected set of preferred channels that includes a pilot signal; and
a second subsystem, coupled to the antenna, configured to down convert and demodulate a second component of the forward link signal at a second carrier frequency to generate a second demodulated component of the forward link signal, wherein the second carrier frequency corresponds to a second preferred channel of the selected set of preferred channels; and
a processor that instructs the first subsystem to tune to the first preferred channel at the first carrier frequency, and attempts to detect a pilot signal on the first preferred channel, wherein if the pilot signal is detected on the first preferred channel the receiver receives a sync channel message, and wherein if the pilot signal is not detected on the first preferred channel, the processor instructs the second subsystem to tune to the second preferred channel at the second carrier frequency of the selected set of preferred channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of operating a receiver in at least one of a multi-carrier mode in a multi-carrier system and a single carrier mode in a single carrier system, comprising:
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receiving a forward link signal;
providing a selected set of preferred channels that includes a pilot signal;
generating a first demodulated component of the forward link signal by down converting and demodulating a first component of the forward link signal at a first carrier frequency that corresponds to a first preferred channel of the selected set of preferred channels;
tuning to the first preferred channel at the first carrier frequency;
attempting to detect a pilot signal on the first preferred channel, wherein if the pilot signal is detected on the first preferred channel the receiver receives a sync channel message;
if the pilot signal is not detected on the first preferred channel, generating a second demodulated component of the forward link signal by down converting and demodulating a second component of the forward link signal at a second carrier frequency that corresponds to a second preferred channel of the selected set of preferred channels; and
tuning to the second preferred channel at the second carrier frequency of the selected set of preferred channels. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification