Patent ID: 9577745
Date: 2017-02-21
CPC Classifications: H04B,H04W

Claim:
1. A code division multiple access mobile communication system terminal, the terminal comprising: a signal receiving antenna producing a received signal; a cell searcher including a timing synchronization sub-part, a short code detection sub-part, and a long code detection sub-part; a data signal receiver; and a data signal transmitter, wherein: the timing synchronization sub-part comprising a first short code generator and a correlator, the timing synchronization sub-part being arranged to generate a first short code, to perform a correlation of a plurality of time instances of the generated first short code with the received signal in a long code masked symbol section of the received signal, and to identify a time instance having a maximum correlation, indicating a slot timing, the short code detection sub-part comprising a second short code generator and a correlator, the short code detection sub-part being arranged to generate candidate second short codes, to perform a correlation of a stored version of the long code masked symbol section of the received signal with the candidate second short codes, and to identify a particular second short code of the received signal, the long code detection sub-part comprising a long code generator, a multiplier and a correlator, the long code detection sub-part being arranged to generate candidate long codes, to multiply the candidate long codes by a third short code to generate code products, and to perform a correlation of each of the code products with the received signal to detect a long code of the received signal, and the first and second short codes each have a length shorter than the third short code and the long code.