Fast initial acquisition & search device for a spread spectrum communication system
First Claim
1. A searcher device for correlating a first code sequence with a second code sequence, the searcher comprising:
- a memory for storing the first code sequence; and
a plurality of computation circuits coupled to the memory, wherein each of the plurality of computation circuits performs a correlation operation between the first code sequence and the second code sequence at a unique phase offset.
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Accused Products
Abstract
A fast initial acquisition and search device for a spread spectrum communication system is disclosed herein. The search device includes a memory for storing the first code sequence, and a plurality of computation circuits coupled in parallel to the memory. The search device also includes a plurality of threshold detector circuits. Each of the plurality of threshold detector circuits is respectively coupled to one of the plurality of computation circuits. Each of the plurality of computation circuits implements a unique phase offset for a second code sequence with respect to the first code sequence. A correlation operation is performed in parallel at each of the plurality of computation circuits followed by a threshold evaluation that indicates whether the correlation result satisfied a threshold value.
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Citations
27 Claims
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1. A searcher device for correlating a first code sequence with a second code sequence, the searcher comprising:
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a memory for storing the first code sequence; and
a plurality of computation circuits coupled to the memory, wherein each of the plurality of computation circuits performs a correlation operation between the first code sequence and the second code sequence at a unique phase offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a searcher, a method of determining a phase offset of a signal, the method comprising the steps of:
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a) receiving the signal having a first code sequence in a memory;
b) receiving an additional signal having a second code sequence at a plurality of computation circuits;
c) implementing a unique phase offset for the second code sequence in each of the plurality of computation circuits; and
d) correlating the second code sequence having the unique phase offsets with the first code sequence in each of the respective plurality of computation circuits. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A communication device for processing data signals, the communication device comprising:
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a transceiver for receiving a signal having a first code sequence;
a code source for generating a second code sequence; and
a searcher coupled to the transceiver and to a code generator, the searcher having a plurality of computation circuits for correlating in parallel the first code sequence and the second code sequence at a plurality of offsets. - View Dependent Claims (24, 25, 26, 27)
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Specification