Acquisition of a code modulated signal
First Claim
1. A method for supporting an acquisition of a code modulated signal received at a receiver, wherein at least a first set of correlation results for correlations between said code modulated signal and a first replica code with different code phases and a second set of correlation results for correlations between said code modulated signal and a second replica code with different code phases are available, said second replica code different from said first replica code, said method comprising:
- combining results from said first set of correlation results and from said second set of correlation results, wherein correlation results used in said combination are selected based on information on a relative difference between a correct code phase for said first replica code and a correct code phase for said second replica code; and
determining based on said combination whether at least one of said first set of correlation results and said second set of correlation results comprises a correlation result representing said correct code phase for said first replica code or said second replica code, respectively.
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Accused Products
Abstract
The invention relates to the acquisition of a code modulated signal, wherein a first set of correlation results for correlations between the code modulated signal and a first replica code with different code phases and a second set of correlation results for correlations between the code modulated signal and a second replica code with different code phases are available. In order to achieve a high sensitivity, results from both sets of correlation results are combined, wherein correlation results used in the combination are selected based on information on a relative difference between a correct code phase for both replica codes. Then, it is determined based on the combination whether at least one of the sets of correlation results comprises a correlation result representing the correct code phase for the first replica code or the second replica code, respectively.
10 Citations
20 Claims
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1. A method for supporting an acquisition of a code modulated signal received at a receiver, wherein at least a first set of correlation results for correlations between said code modulated signal and a first replica code with different code phases and a second set of correlation results for correlations between said code modulated signal and a second replica code with different code phases are available, said second replica code different from said first replica code, said method comprising:
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combining results from said first set of correlation results and from said second set of correlation results, wherein correlation results used in said combination are selected based on information on a relative difference between a correct code phase for said first replica code and a correct code phase for said second replica code; and determining based on said combination whether at least one of said first set of correlation results and said second set of correlation results comprises a correlation result representing said correct code phase for said first replica code or said second replica code, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for supporting an acquisition of a code modulated signal received at a receiver, wherein said apparatus has access to at least a first set of correlation results for correlations between said code modulated signal and a first replica code with different code phases and a second set of correlation results for correlations between said code modulated signal and a second replica code with different code phases, said second replica code different from said first replica code, said apparatus comprising a processor and software code, the software code, with the processor configured to cause the apparatus to perform:
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combine results from said first set of correlation results and from said second set of correlation results, wherein correlation results used in said combination are selected based on information on a relative difference between a correct code phase for said first replica code and a correct code phase for said second replica code; and determine based on said combination whether at least one of said first set of correlation results and said second set of correlation results comprises a correlation result representing said correct code phase for said first replica code or said second replica code, respectively. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A memory having instructions encoded thereon for execution by a processing unit, for supporting an acquisition of a code modulated signal received at a receiver, wherein at least a first set of correlation results for correlations between said code modulated signal and a first replica code with different code phases and a second set of correlation results for correlations between said code modulated signal and a second replica code with different code phases are available, said second replica code different from said first replica code, said instructions realizing the following when running in said processing unit:
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combining results from said first set of correlation results and from said second set of correlation results, wherein correlation results used in said combination are selected based on information on a relative difference between a correct code phase for said first replica code and a correct code phase for said second replica code; and determining based on said combination whether at least one of said first set of correlation results and said second set of correlation results comprises a correlation result representing said correct code phase for said first replica code or said second replica code, respectively.
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Specification