SIGNAL TRANSMITTING METHOD, TRANSMITTER, RECEIVER, AND SPREAD-SPECTRUM CODE SYNCHRONIZING METHOD FOR MOBILE COMMUNICATION SYSTEM

摘要

The spread-spectrum code synchronizing speed of a down control channel is improved. The spectra of a control channel information signal and each communication channel information signal are spread by using different first spread-spectrum codes having the repetitive periods of information symbol periods from each first spread-spectrum code (short code) generating section (11). Then only the spectrum of the control channel information signal is spread by using third spread-spectrum codes which are complex conjugation of a common long code (second spread-spectrum code) to be spread from a third spread-spectrum code (complex conjugate code of a long code mask section) generating section (12). Thereafter, the signals of all channels are added at an adequate timing by an adder (13), the spectrum of the output of the adder (B) is spread by using second spread-spectrum codes from a second spread-spectrum code generating section (14), and the spread-spectrum signal is outputted as a spread modulated signal.