SPREAD SPECTRUM SYSTEM RECEIVER, SYNCHRONIZATION LATCH CIRCUIT AND SYNCHRONIZATION LATCH METHOD

摘要

PROBLEM TO BE SOLVED: To provide a spread spectrum system receiver where a deviation in a cope phase detected at synchronization tracking and correction of the deviation are sufficiently small and to provide a synchronization latch circuit and a synchronization latch method. ;SOLUTION: A mobile phone supplies a synchronization series 18A and a synchronization series 18B via a delay inversion section 200 to a correlation value calculation section 202 in a synchronization latch circuit 20C, the correlation value calculation section 202 calculates correlation values among a reception series 14A and the synchronization series 18A, 18B respectively and only the single correlation value calculation section 202 calculates a difference CD of the correlation values. The correlation value calculation section 202 supplies the calculated output to a control variable calculation section 204 as a correlation amount. The control variable calculation section 204 outputs the correction amount as a control variable. Through the control, an oscillator 16 and a code generator 18 are controlled so as to maintain a code synchronization with the reception series 14A. The circuit scale is simplified by the calculation of the difference CD of the correlation values by only the correlation value calculation section 202.;COPYRIGHT: (C)2001,JPO