Reception synchronization circuit, receiver using the same, and digital communication system

摘要

A reception synchronization circuit for receiving a unique word transmitted in a predetermined digital pattern comprising: a detection circuit for detecting the reception electric field intensity as received power; a UW correlation judgment circuit for detecting the unique word (hereinafter referred to as "UW") and taking a correlation between the unique word thus detected and a predetermined digital pattern; and a memory for storing two or more threshold values for the movement average, wherein after the two or more threshold values and the movement average are compared with each other, the correlation is taken by said UW correlation judgment circuit when the movement average is larger than the minimum values of the two or more threshold values. <IMAGE>