公开(公告)号：JPH06237289A

公开(公告)日：1994-08-23

申请号：JP35275693

申请日：1993-12-29

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIN EIKA ,  RO HEIKEI ,  TEI SHIYOUKUN ,  IN SAIU ,  TEI KIYOUITSU ,  BOKU MITSUHIRO

IPC: G01R23/10 ,  H04M1/24

Abstract: PURPOSE: To detect fine frequency deviation that is induced by a transmission channel by making a deviation detecting method for a fine frequency include a 1st stage that decides a measuring cycle, through a 5th stage that decides a final frequency deviation value. CONSTITUTION: In this method, a basic cycle is detected first to decide a measuring cycle in a 1st stage 31. Next in a 2nd stage 32, normalization processing is performed, based on the basic cycle that is detected in a 1st stage. Then, in a 3rd stage 33, only the signal value of an object to be calculated is selected from signal values of the basic cycle and the measuring cycle. In 4th stages 34 and 35, the code or direction of frequency deviation is decided 35 by calculating 34 the absolute value of frequency deviation from the signal value of the object to be calculated. Finally, in a 5th stage 36, a final frequency deviation value is decided according to the code that is decided from the absolute value of the frequency deviation. Fine frequency deviation that is induced on a transmission channel can be detected through these stages.