Pulse or digital communications – Equalizers – Automatic
Patent
1994-07-01
1996-06-25
Chin, Stephen
Pulse or digital communications
Equalizers
Automatic
36472401, H03H 730, H03H 740, H03K 5159
Patent
active
055307205
ABSTRACT:
An analytical digitizer for signal processing includes a sampler and an analog/digital converter. A first calculating device supplies a first component of the signal made up of a sequence of digital values. Each value is calculated by adding 2h+2 value supplied by the converter weighted with respective non-null integer coefficients a.sub.0, . . . , a.sub.h, a.sub.h, . . . , a.sub.0. A second calculating device supplies a second component of the signal, in phase quadrature to the first, and made up of a sequence of digital values y(t). Each of these values is calculated by adding 2h+2 values supplied by the converter weighted with respective non-null integer coefficients b.sub.0, . . . , b.sub.h-1, -b.sub.h-1, . . . , -b.sub.0. The number and the value of the coefficients are determined by a rigorous method according to the center frequency and the bandwidth of the spectrum of the signal to be processed and according to a fixed limit value for the signal
oise ratio. The device finds an application in radio surveillance receivers.
REFERENCES:
patent: 4843581 (1989-06-01), Cupo et al.
patent: 5432725 (1995-07-01), Bond
Alcatel Espace
Chin Stephen
Phan Hai H.
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