Patent ID: 7123929
Filing Date: 2006-10-17
Classification: H04B

Abstract:
1. A method for performing, as a function of a received signal, fine slot synchronization, definition of frame parity, and codegroup identification in a cellular communication system that uses a plurality of synchronization codes, the method comprising: correlating said received signal with at least some of said synchronization codes, obtaining corresponding energy values; searching among said energy values, at least one maximum value, identifying, according to said at least one maximum value, a given number of said synchronization codes and the corresponding phases; and performing said fine slot synchronization and identifying said codegroup on the basis of said given number of said synchronization codes and of the corresponding phases obtained by means of correlation; dividing said synchronization codes into a plurality of possible codesets, each set of said plurality comprising a first synchronization code which identifies the corresponding set, and a codeset of remaining codes; correlating said received signal with the first codes of said plurality of possible codesets, the search for said at least one maximum energy value identifying one of said first codes and the corresponding codeset in said plurality; correlating said received signal with the remaining codes of said corresponding codeset of said plurality; and performing said fine slot synchronization, identification of parity of the frame, and identifying said codegroup on the basis of said one of said first codes, of the remaining codes of said corresponding codeset of said plurality, and of the corresponding phases obtained by means of correlation.