Method of generating an index value
First Claim
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1. A method for adjusting and maintaining a search frequency within a communication signal, comprising:
- extracting one of a plurality of offset frequencies and one of a plurality of base frequencies using a sample selector;
generating a search frequency by combining one of the plurality of offset frequencies with one of the plurality of base frequencies using an adaptive frequency circuit (AFC);
retrieving a primary scrambling code using a frequency synthesizer;
adjusting the search frequency based on the primary scrambling code using a controller; and
maintaining the search frequency via an oscillator, the oscillator comprising at least one of a voltage controlled oscillator or a numerically controlled oscillator.
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Abstract
A method of generating an index value associated with a primary synchronization code within a communication signal includes splitting a sampled communication signal into even and odd samples. The even and odd samples are correlated with a primary synchronization code of the communication signal and complex values of the even and odd samples are generated. Signal strength values for the even and odd samples are approximated and the approximate signal strength values within a frame of the communication signal are accumulated. A highest accumulated signal strength value is assigned as an index value.
36 Citations
14 Claims
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1. A method for adjusting and maintaining a search frequency within a communication signal, comprising:
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extracting one of a plurality of offset frequencies and one of a plurality of base frequencies using a sample selector; generating a search frequency by combining one of the plurality of offset frequencies with one of the plurality of base frequencies using an adaptive frequency circuit (AFC); retrieving a primary scrambling code using a frequency synthesizer; adjusting the search frequency based on the primary scrambling code using a controller; and maintaining the search frequency via an oscillator, the oscillator comprising at least one of a voltage controlled oscillator or a numerically controlled oscillator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for adjusting and maintaining a search frequency in wireless communications, the apparatus comprising:
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a frequency synthesizer configured to retrieve a primary scrambling code; a sample selector configured to extract one of a plurality of offset frequencies and one of a plurality of base frequencies; an adaptive frequency circuit (AFC) configured to generate a search frequency by combining one of the plurality of offset frequencies with one of the plurality of base frequencies; an oscillator configured to maintain the search frequency, the oscillator comprising at least one of a voltage controlled oscillator or a numerically controlled oscillator; and a controller configured to adjust the search frequency based on the primary scrambling code. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification