公开(公告)号：JPH11177529A

公开(公告)日：1999-07-02

申请号：JP23784198

申请日：1998-08-24

Applicant: KOREA ELECTRONICS TELECOMM ,  KOREA TELECOMMUN

Inventor： GYO EKISHU ,  TEI KOICHI ,  KIM KYUNG-SOO

IPC: H03K3/84 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L23/00 ,  H04J13/04

Abstract: PROBLEM TO BE SOLVED: To provide the Hadamard code generating circuit by which 48th Hadamard code among orthogonal codes required to generate a signal or to extract the generated signal in the CDMA communication system. SOLUTION: The 48th Hadamard code generating circuit is made up of a 2-bit counter 24 that generates 4th Hadamard codes in low-order 2-bit, a 4-bit counter 21 that is operated by a carry output of the 2-bit counter 24 and produces a high-order Paley code having 12 states, a 6-bit reference counter 25 having 48 states by external reset, a 6-bit register 26 that stores an index value, and an exclusive OR gate 30 that exclusively Ors the high-order 12 Palye code and the 4th Hadamard code in the low-order 2-bit to produce the final 48th Hadamard code.