JPS56158547A - Time division multidirectional communication system - Google Patents

Abstract

PURPOSE:To determine a correct sampling clock location only with a master station, by providing a clock phase adjuster for slave station reception signal code reproduction at a master station in correspond to each slave station, in a time division multidirectional communication system among the master station and a plurality of slave stations. CONSTITUTION:In a master station, a reception signal from each slave station is demodulated at a demodulator 11, a demodulation signal is fed to an identifier 12, where it is identified with a sampling SP clock CK and data output is produced with a code reproduction. A CK oscillator 13 produces a reference CK, this is transmitted CK, and it is fed to phase shifters 14-1-14-n to make phase shift corresponding to the reception signal from the slave stations 1-N. Switching is made with the burst signal corresponding to the signal of each slave station at a switching device 15 and it is fed to an identifier 12 as the SPCK. Thus, in the master station, the phase relation between the reception signal of each slave station and the SPCK is observed without communication with the slave stations and the corresponding phase shifter is adjusted, allowing to adjust the location of phase of SPCK so that it is correctly at the center to the reception signal of each slave station.