Abstract: A method and apparatus for performing signal correlation is described. In one example, portions of a pseudorandom reference code are multiplied with portions of a repeating code of the digital signal to produce a plurality of inner products. The plurality of inner products are then integrated over a period less than a period of the repeating code to produce a correlation result with a broadened frequency response. In another example, the digital signal is correlated with a pseudorandom reference code to produce a first correlation. The digital signal is then correlated with the pseudorandom code reference code to produce a second correlation. The first and second correlations are then used to determine first and second signal delays. The frequency shift of the digital signal is computed using a difference between the first and second signal delays over time.
Type:
Application
Filed:
March 21, 2003
Publication date:
November 27, 2003
Applicants:
Charles Abraham, Serge de la Porte, Sergei Podshivalov to Global Locate, Inc.
Inventors:
Charles Abraham, Serge de la Porte, Sergei Podshivalov