| 摘要 |
PURPOSE:To attain the reduction in the transmission capacity of a control line or the frequency band, by taking synchronism relating to the phase control for the entire plural systems, in the transmission space diversity system of plural systems. CONSTITUTION:Main line incoming signals A1-An of n systems are transmitted from an antennas 3, 4 via a demultiplexer 2 as pairs of space diversity SD transmission signals P1, Q1-Pn, Qn different from the phase only by transmitters 11-1n corresponding to the input signals. The transmitters are controlled with control signals L1-Ln from a line controlling circuit 5. The signals P1, Q1 and the like received from an antenna 6 are demultiplexed by a demultiplexer 7 and output signals B1-Bn are outputted by receivers 211-21n. Simultaneously, a line controlling circuit 22 transmits strobe signals S1-Sn to corresponding receivers in the period of X0. The receivers transmit phase controlling signals E1-En by designating the strobe signals as a trigger. The signals E1-En are synchronized with the signals S1-Sn by a shift of time interval until the phase controlling signals of n-system are finished for receiving. |
