Data signal compensation apparatus for use in a receiver

Details Data signal compensation apparatus for use in a receiver Data signal compensation apparatus for use in a receiver

1991-11-13

1993-06-22

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375100, 307359, H04L 2506

Patent

active

052220788

ABSTRACT:
The present patent application includes a discussion of a signal compensation apparatus (119). The apparatus is implemented in a digital radiotelephone (101) having diversity receivers (111, 113). The signal compensation apparatus utilizes three control loops and a branch selection switch circuit to substantially diminish the undesired gain and DC offset present in the selected received data signal. Portions of the apparatus are implemented in a digital signal processor (DSP) (249) for rapid adjustment of the control loops when switching to a different receiver branch.

REFERENCES:
patent: 4250458 (1981-02-01), Richmond et al.
patent: 4575863 (1986-03-01), Butcher et al.
patent: 4873702 (1989-10-01), Chiu
patent: 5052020 (1991-09-01), Koenck et al.
patent: 5095496 (1992-03-01), Jang
patent: 5119404 (1992-06-01), Aihara
Miyatake, Ogose, Selection Combining Diversity Reception Effect for Coherant QPSK Under Frequency Selective Fading, pp. 125-128, of the Transactions of The IEICE vol. E73, No. 1 Jan. 1990.

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