Patent ID: 7522656
Filing Date: 2009-04-21
Classification: H04B

Abstract:
1. A method for determining code synchronization timing in relation to a spread spectrum transmission, comprising: receiving a number of signal samples, said number of signal samples constituting a signal sample sequence that represents a length of a received signal spread with a pseudorandom sequence used as a spreading code, said pseudorandom sequence having a length, as a response to the length of said pseudorandom sequence being different than a dimension of a piece of code acquisition means, processing said signal sample sequence, thus producing a processed signal sample sequence, correlating said processed signal sample sequence with a locally produced sample sequence that comprises code samples representing a known form of said spreading code, thus producing a correlation, and using a result of said correlation as a basis for determining a code synchronization wherein said locally produced sample sequence contains as many code samples as there are signal samples in the signal sample sequence before said processing, wherein processing said signal sample sequence involves augmenting said signal sample sequence at least at one end with at least one additional symbol, thus producing a padded signal sample sequence, and said locally produced sample sequence contains additionally neutral symbols used to fill in said locally produced sample sequence to a length that is equal to the length of said padded signal sample sequence, and wherein said additional symbols used to augment said signal sample sequence at least at one end are signal samples from another signal sample sequence that represents a length of a received signal spread with one full length of a pseudorandom sequence used as a spreading code.