Programmable noise bandwidth reduction by means of digital avera

Details Programmable noise bandwidth reduction by means of digital avera Programmable noise bandwidth reduction by means of digital avera

1989-12-22

1991-09-24

Eisenzopf, Reinhard J.

Pulse or digital communications

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36472401, 364734, 455296, 455303, 455306, 455307, H04B 110

Patent

active

050520270

ABSTRACT:
Predetection noise bandwidth reduction is effected by a pre-averager capable of digitally averaging the samples of an input data signal over a single symbol, the averaging interval being defined by the input sampling rate divided by the output sampling rate. As the averaged sample is clocked to a suitable detector at a much slower rate than the input signal sampling rate the noise bandwidth at the input to the detector is reduced, the input to the detector having an improved signal to noise ratio as a result of the averaging process, and the rate at which such subsequent processing must operate is correspondingly reduced. The pre-averager may form a data filter when the output sampling rate is reduced to one sample per symbol of received data.

REFERENCES:
patent: 4563637 (1986-01-01), De Bortoli et al.
patent: 4583184 (1986-04-01), Murase
patent: 4714929 (1987-12-01), Davidson
patent: 4727504 (1988-02-01), Van Broekhoven

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