Data receiving in a digital mobile communication

Details Data receiving in a digital mobile communication Data receiving in a digital mobile communication

1996-08-01

1998-09-15

Pham, Chi H.

Pulse or digital communications

Receivers

375323, 375329, 455 7, 455 14, 370342, H03K 900, H03D 322, H04B 7216, H04B 336

Patent

active

058090843

ABSTRACT:
A data receiving system has a radio frequency unit for demodulating a series of signals transmitted at a carrier wave frequency, a local oscillating unit for generating a demodulating frequency used for the demodulation of the series of signals, an equalizing unit for removing a distortion of the series of signals demodulated in the radio frequency unit, a phase shift estimating unit for taking out phase information from the series of signals, calculating a time changing rate of the phase information and estimating a phase shift caused by a difference between the carrier wave frequency and the demodulating frequency according to the time changing rate, and a correcting unit for correcting the series of signals transmitted from the equalizing unit according to the phase shift to remove the phase shift from the series of signals. Accordingly, because the phase shift is estimated by using the phase information placed in the series of signals, an influence of a bit pattern of a series of training bits arranged in the series of signals can be removed.

REFERENCES:
patent: 5081462 (1992-01-01), Tachita et al.
patent: 5136612 (1992-08-01), Bi
patent: 5257291 (1993-10-01), Desperben et al.
patent: 5648986 (1997-07-01), Tatsumi et al.
"Physical Layer on the Radio Path: General Description"; European digital cellular telecommunication system (phase 1); Feb. 1992; pp., 1-11.

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