Modulation Device, Demodulation Device and Wireless Modem

The present invention relates to a wireless modem that is included in the radio communication terminal, more specifically, to a wireless modem for controlling the internal drive clock to reduce power consumption in the active mode. The modem of the present invention, a wireless core module for receiving transmission / radio signals; Modulator for transmission by converting the data to be transmitted to the radio transmission signal to the wireless core module; A demodulator for converting the signal received from the wireless core module to receive data; A synchronizer for synchronizing the signals received from the wireless core module; And it characterized in that it includes a clock controller for generating drive clock to the modulator, demodulator and synchronizer respectively. The proposed low-power clock controller has a synchronizer, an analog controller, a demodulator, channel decoder, the modulator, is divided into six main control functional block diagram of a channel encoder block, characterized in that only the major functional blocks the clock input operation. OFDMA terminal modem via the clock control of these it is possible to minimize the power consumption of the clock switching at the time of operation in the active mode. Power saving, modem, OFDM, the idle interval, modulator