Code division multiple access mobile communication system

Details Code division multiple access mobile communication system Code division multiple access mobile communication system

H - Electricity

04

B

H04B 7/216 (2006.01) H04B 1/707 (2006.01) H04B 7/26 (2006.01) H04Q 7/22 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2184938

A code division multiple access (CDMA) mobile communication system has improvements to permit stable reception with a minimum of bit error. The system comprises a voltage-controlled oscillator for supplying a carrier to a radio frequency quadrature demodulator, and a frequency controller for detecting a frequency error from a phase correction signal of the first step to generate a control signal that controls the oscillator. The frequency controller includes an extracting circuit and an integrating circuit. The extracting circuit extracts a phase change based on the frequency error derived from the phase correction signal of the first step and from a signal preceding that signal by a predetermined delay time. The integrating circuit integrates the phase change and outputs the integrated result as the control signal.

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