Patent ID: 7020111
Filing Date: 2006-03-28
Classification: G06F,H03H,H04B,H04J,H04L,H04W,Y02D

Abstract:
1. A system for rapidly acquiring a spreading code used in a code division multiple access (CDMA) system, comprising: a code generator for generating a plurality of P long codes, where P is a number of long codes in the plurality of long codes, with each long code having a length N chips, with each long code different from the other long codes in the plurality of long codes; a transmitter, coupled to said code generator, for transmitting, over a communications channel using radio waves, the plurality of long codes at a plurality of phase angles, respectively, on a carrier signal, with each phase angle in the plurality of phase angles different from other phase angles in the plurality of phase angles; and an acquisition circuit, coupled to the communications channel, for acquiring from the communications channel using said phase-acquisition circuit, the plurality of long codes, respectively, by searching, in parallel, N/P chips of each long code of the plurality of long codes.