| 摘要 |
PURPOSE:To extend a battery service life corresponding to a value equivalent to power consumption in an equalizer by implementing TDMA (time division multiplex) transmission while an outgoing signal and an incoming signal are arranged on one and same frequency. CONSTITUTION:A transmission data generated by a transmission signal generator 1 is modulated by a modulator 2 and an inverse characteristic filter 3 convolutes a transfer function of an inverse characteristic (1/H(Z)) of an outgoing transmission line 4 and the result is sent from a base station 11. Then a modulation signal is sent through a transmission line 4 whose transfer function is represented as a model of H(Z), received by a receiver side mobile station 12 and demodulated by a demodulator 5 as it is. Moreover, a transmission data generated by a transmission signal generator 6 is modulated similarly by a modulator 7 and sent from the mobile station 12. Then the signal is received by an incoming (sender) side base station 11 through a transmission line 8, the distortion in the transmission line 8 is eliminated by an equalizer 9 and demodulated by a demodulator 10. Thus, the battery service life in the mobile station is extended and the allowed speech time and the standby time are increased. |
