Patent ID: 7061893
Filing Date: 2006-06-13
Classification: H04B

Abstract:
1. An apparatus for synchronizing frame and detecting code group/number, comprising: an on time despreader for despreading a receiving input by having a slot timing position designated after slot synchronization as a sampling point; an early time and a late time despreaders for dispreading a sampling point that is earlier or later than the sampling point of the on time despreader; a slew detector for detecting a time offset using energy of a despread signal outputted from the despreaders; a slew storage connected to the slew detector for storing an outputted slew value at the result of the time offset detection based on the energy of the outputted despread signal from the despreaders; a multiplexer for selecting one out of outputted values from the on time, the late time and the early time despreaders according to the output of the slew detector; an energy storage for storing outputted values of the multiplexer; and a code group detector for detecting frame synchronization and code groups using the outputted values from the energy storage and from the slew storage, respectively.