Communication system and demodulator used in communication syste

Details Communication system and demodulator used in communication syste Communication system and demodulator used in communication syste

1991-11-27

1994-03-01

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375106, H04L 2706

Patent

active

052915271

ABSTRACT:
A communication system having a plurality of communication stations and a modulation transmission line for transmitting a burst modulation signal between the plurality of communication stations in time division multiple access, at least one of the plurality of communication stations comprising, sampling timing generating device for generating a sampling timing whose bits have been synchronized with the burst modulation signal before receiving the burst modulation signal transmitted from another communication station, quasi-synchronous detecting device for quasi-synchronously detecting the burst modulation signal and for successively outputting a first vector signal on a phase plane, sampling device for successively sampling the first vector signal obtained by the quasi-synchronous detecting device in a sampling timing generated by the sampling timing generating device, phase rotation amount estimating device for estimating a phase rotation amount of the first vector signal in accordance with a correlation among a particular number of the first vector signals sampled by the sampling device, and phase compensating device for compensating the phase of the first vector signal in accordance with the phase rotation amount estimated by the phase rotation amount estimating device.

REFERENCES:
patent: 3613019 (1971-10-01), Muratani
patent: 4918718 (1990-04-01), Emmons et al.
The Transactions of the Institute of Electronics and Communication Engineers of Japan, "Time Slotted Bus System With Control Window", vol. J69-B, No. 10, Oct. 1986, pp. 1083-1091.

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