PURPOSE:To regulate phases with a simple constitution by connecting plural local stations to a master station through wires and transmitting the same data from the local stations to a moving station at the same frequency and the same phase wirelessly. CONSTITUTION:An input of a radio signal (data signal) transmitter 211 of the 1st local station 11 is applied to a radio call transmitter 221 to actuate the transmitter 221 and its transmission signal is received by a receiver 232 of the 2nd local station 12. A phase difference measuring device 13 measures and stores the quantity of delayed phase from the transmission of a specific signal from the master station 11 to return to the master station 11 through a wired communication line 181, the radio call transmitter 221, the receiver 232 and a wired communication line 272. Subsequently, an input of a radio signal transmitter 212 of the 2nd local station is applied to a radio call transmitter 222 to acutate the transmitter 222 and the transmission signal of the transmitter 222 is received by the receiver 232. The phase difference measuring device 13 measures the delayed phase until a specific signal from the master station 11 is returned through a wired communication line 182, a wireless section 29 and a wired section 272 and finds the difference between the measured delayed phase and the precedently stored delayed phase to set up the phase difference in a delay circuit 192.

System for measuring phase difference

PURPOSE:To eliminate the effect caused by the uneven delay phase amount between the transmitter and the receiver of the repeater station by giving the preliminary adjustment of the delay phase amount between the master station and the slave station in the method with which the data signal delay phase amount is made constant between the base stations by means of the radio system. CONSTITUTION:Master station 20 contains 1st transmitter and receiver 2 and 3 of the radio system plus phase difference measurement unit 1 connected to 1st and 2nd variable delay circuit 4 and 12; 2nd slave station 21 includes 2nd transmitter and receiver 10 and 11, demodulator 8 and 2nd transmitter 9; and 1st slave station 22 contains demodulator 16 plus 3rd transmitter 17 and 18 respectively. A connection is given betwen 2 and 11 as well as between 3 and 10 via the wired circuit, and the radio wave is repeated between station 20 and 22 via station 21. In such system, the delay phase amount is measured by unit 1 during the time the wave transmitted from transmitter 2 is received at receiver 3. And the delay phase amount is adjusted via delay circuit 5 and 13 and then applied to demodulator 8 and 16 of station 21 and 22 via the wire to perform an adjustment of the phase amount.

Adjusting method for interrstation delay phase amount

PURPOSE:To reproduce the clock pulse in a short time and less in the phase shift, by resetting the counter causing the reproducing clock pulse directly obtaining the average of the phase of input signal CONSTITUTION:The gate signal production circuit 14 outputs the gate pulse x14 having the width in proportional to the phase difference between the input signal x10 and the reproducing clock pulse x12 from the counter 12, the gate circuit 13 passes through the high speed pulse train X11 as the pulse train X13 only at the period of the pulse width of X14, and the counter 15 rises the output X15 when it is counted by N On the other hand, when the N sets of pulses X14 is counted, the output X16 rises and changes over the gate circuit 17 passed through the counter 18 for passing through the pulse train X11 The counter 18 counts the pulse train X11 for the time subtracting the time of one period of pulse X12 for the average value of the width of the pulse X14, rising the output X18 Further, the phase synchronism is made to the average phase of the input signal varying point in jitter for the pulse X12, by resetting the countr 12

Kage Gouzou

Papers

Adjusting method for interrstation delay phase amount

Clock pulse reproducing circuit