Patent Number: 6,167,037

Title: Signal transmitting method, transmitter, receiver, and spread-spectrum code synchronizing method for mobile communication system

Abstract: Achieving high speed spreading code synchronization of a forward link control channel. A control channel information signal and traffic channel information signals are each spread by different first spreading codes which are fed from a first spreading code (short code) generator (11), and which have a period equal to the period of an information symbol. Subsequently, only the control channel information signal is spread by a third spreading code which is fed from a third spreading code (long code masked portion complex conjugate code) generator (12), and which has a form of complex conjugate of a long code (second spreading code) used for spreading in common. The signals of the entire channels are summed up by an adder (13) at appropriate timings, and the resultant sum is spread by the second spreading code fed from a second spreading code generator (14), thereby being output as a spread modulation signal.

Inventors: Higuchi; Kenichi (Yokosuka, JP), Sawahashi; Mamoru (Yokohama, JP), Adachi; Fumiyuki (Yokohama, JP), Ohno; Koji (Yokohama, JP), Higashi; Akihiro (Yokosuka, JP)

Assignee: NTT Mobile Communications Networks Inc.

International Classification: H04J 13/00 (20060101); H04J 13/02 (20060101); H04B 1/707 (20060101); H04B 7/26 (20060101); H04B 007/216 ()

Expiration Date: 12/26/2017