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US 8,576,954 B1Granted
Method and apparatus of cross-correlation
AssigneeMarvell World Trade Ltd.
InventorsKobby Pick, Yona Perets
Life of this patent
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Abstract
Briefly, a method and apparatus to calculate cross-correlation values of complex binary sequences are provided. The apparatus may include a transformation unit and a cross-correlator. The cross-correlator may include a cross-correlation controller to provide, based on a type bit and a sign bit, a real component and/or an imaginary component of signals of complex binary sequences to a real accumulator and/or to an imaginary accumulator.
Claims20
A receiver for use on a cellular radio network, the receiver comprising:
- a transformation unit configured to transform phase shift keying (PSK) sequences of a first input signal and a second input signal, respectively, into a first signal of complex sequences and a second signal of complex sequences;
- an accumulation unit comprising (i) a first accumulator to provide a real cross-correlated signal and (ii) a second accumulator to provide an imaginary cross-correlated signal;
- and
- a cross-correlation controller configured to:
- provide (i) real components of the first signal of complex sequences and the second signal of complex sequences to the first accumulator, and (ii) imaginary components of the first signal of complex sequences and the second signal of complex sequences to the second accumulator, and
- selectively activate, at any given time, any one of the first accumulator and the second accumulator.
3 more elements
A method comprising:
- transforming phase shift keying (PSK) sequences of a first input signal and a second input signal, respectively, into a first signal of complex sequences and a second signal of complex sequences;
- providing (i) real components of the first signal of complex sequences and the second signal of complex sequences to a first accumulator, and (ii) imaginary components of the first signal of complex sequences and the second signal of complex sequences to the second accumulator;
- selectively activating, at any given time, any one of the first accumulator and the second accumulator;
- providing, by the first accumulator, a real cross-correlated signal;
- and
- providing, by the second accumulator, an imaginary cross-correlated signal.
3 more elements
Dependencies are inferred from the claim text.