Patent ID: 6246714
Filing Date: 2001-06-12
Classification: H04B

Abstract:
A synchronization circuit with correlated signal in a direct spread spectrum telecommunication system for taking a given number of samples per one chip of spread signal which are directly spread in accordance with a spread code, including a circuit for determining a correlation between the signal based upon the obtained sample values and the spread code and a circuit for generating a synchronization signal in response to the resultant correlated signal input thereto, wherein the circuit for generating a synchronization signal comprises:a comparing and determining means for determining by comparing the correlated signal with a predetermined threshold and median maximum discriminating means for outputting a flag representing where a median sample is larger in amplitude than previous and subsequent samples along successive odd number of samples of the correlated signal, whereby a synchronization signal with correlation is generated based upon an output which is generated when the comparing and determining means determines that the correlated signal exceeds the predetermined threshold and the flag is set by the median maximum discriminating means.