Digital down converter and method

Details Digital down converter and method Digital down converter and method

1992-08-14

1996-02-20

Chin, Stephen

Pulse or digital communications

Receivers

Interference or noise reduction

375345, 3647241, 4552341, H04B 110

Patent

active

054935814

ABSTRACT:
A digital down converter for extracting a signal from a complex digital signal wherein the real and imaginary components of the complex digital signal are each modulated to shift the center frequency of the desired signal to zero frequency, decimated digitally to limit the bandwidth of each to the bandwidth of the desired signal and filtered to alter the shape thereof. The digital down converter includes a formatter for arranging the output of the desired signal in one of multiple output formats and a controller for programmably controlling the modulation, decimation and filtering and for selecting the desired output format.

REFERENCES:
patent: 4538111 (1985-08-01), Giusto
patent: 4633484 (1986-12-01), Takeda et al.
patent: 5023940 (1991-06-01), Johnson et al.
patent: 5042052 (1991-08-01), Roberts et al.
patent: 5065107 (1991-11-01), Kumar et al.
patent: 5138272 (1992-08-01), Le Polozec et al.
patent: 5202766 (1993-04-01), Mehrgardt et al.

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