Patent ID: 8345714
Filing Date: 2013-01-01
Classification: H04B

Abstract:
1. A cell search apparatus for an asynchronous mobile communication system, comprising: a Secondary Synchronization Code (SSC) correlator which despreads a signal at every slot boundary in accordance with a z-sequence to output an SSC correlation value, wherein the signal is received over a first symbol duration; a Primary Synchronization Code (PSC) correlator which despreads the received signal in accordance with a PSC to output a PSC correlation value; a dot product calculator which performs a dot product calculation between the SSC correlation value and the PSC correlation value to output a correlation result of the SSC; and a frame synchronization detector which extracts frame synchronization information from the correlation result, wherein the SSC correlator comprises a secondary accumulator which accumulates the despread signal per a predetermined number of chips to output an accumulated signal, and the PSC correlator comprises a primary accumulator which accumulates the despread signal per an N multiple of the predetermined chips, to output an accumulated signal, wherein N is a natural number.