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US006212219B1
(12) United States Patent ao) Patent No.: us 6,212,219 Bi
Shou et al. (45) Date of Patent: Apr. 3,2001
(54) SPREAD SPECTRUM COMMUNICATION SYSTEM
(75) Inventors: Guoliang Shou; Changming Zhou;
Xuping Zhou; Makoto Yamamoto;
Sunao Takatori, all of Tokyo (JP)
(73) Assignees: Yozan Inc., Tokyo; Sharp Kabushiki
Kaisha, Osaka, both of (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 08/780,137
(22) Filed: Dec. 26, 1996
(30) Foreign Application Priority Data
Dec. 26, 1995 (JP) 7-351415
Jan. 23, 1996 (JP) 8-028467
Apr. 12, 1996 (JP) 8-114431
(51) Int. C I. H04L 27/30
(52) U.S. CI 375/130; 375/140; 375/142;
375/143; 370/342
(58) Field of Search 375/344, 367,
375/130, 140, 142, 143; 380/34; 370/342,
479, 209, 441
(56) References Cited
U.S. PATENT DOCUMENTS
5,063,571 11/1991 Vancraeynest 375/130
