Background processing and searching for a communication channel
First Claim
Patent Images
1. A method comprising:
- receiving through an antenna of a radio frequency module a pilot signal at a first clock rate during at least part of a first time period of a wake period of a slotted mode;
deactivating said radio frequency module after receiving said pilot signal;
determining a pseudo-random noise offset of said pilot signal at a second, faster clock rate during at least part of a second time period of said wake period; and
synchronizing said radio frequency module to said determined pseudo-random noise offset if said module is out of step with currently said determined pseudo-random noise offset.
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Abstract
A method including searching for a communication channel by activating a receiver having a radio frequency (RF) module and a baseband module for storing a portion of received signals within a first time period, de-activating the RF module of the receiver, and background processing the portion of the received signals with a variable clock rate within a second time period.
50 Citations
16 Claims
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1. A method comprising:
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receiving through an antenna of a radio frequency module a pilot signal at a first clock rate during at least part of a first time period of a wake period of a slotted mode; deactivating said radio frequency module after receiving said pilot signal; determining a pseudo-random noise offset of said pilot signal at a second, faster clock rate during at least part of a second time period of said wake period; and synchronizing said radio frequency module to said determined pseudo-random noise offset if said module is out of step with currently said determined pseudo-random noise offset. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A receiver comprising:
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an antenna; a radio frequency module coupled to said antenna for receiving a pilot signal at a first clock rate during at least part of a first time period of a wake period of a slotted mode; and a processor for deactivating said radio frequency module after said pilot signal is received and for determining a pseudo-random noise offset of said pilot signal at a second, faster clock rate during at least part of a second time period of said wake period and for synchronizing said radio frequency module to said determined pseudo-random offset if said module is out of step with currently said determined offset. - View Dependent Claims (8, 9, 10, 11)
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12. A cellular communication system comprising:
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an antenna; a radio frequency module coupled to said antenna for receiving a pilot signal at a first clock rate during at least part of a first time period of a wake period of a slotted mode; and a processor for deactivating said radio frequency module after said pilot signal is received and for determining a pseudo-random noise offset of said pilot signal at a second, faster clock rate during at least part of a second time period of said wake period and for synchronizing said radio frequency module to said determined pseudo-random noise offset if said module is out of step with currently said determined pseudo-random noise offset. - View Dependent Claims (13, 14, 15, 16)
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Specification