Digital filter for IQ-generation, noise shaping and neighbor...

Details Digital filter for IQ-generation, noise shaping and neighbor... Digital filter for IQ-generation, noise shaping and neighbor...

2007-01-09

2007-01-09

Deppe, Betsy L. (Department: 2611)

Pulse or digital communications

Equalizers

C375S308000, C708S313000

Reexamination Certificate

active

09863487

ABSTRACT:
A polyphase filter of order x·N that builds N allpass filters of order x·N has a structure of an allpass filter of order x comprising delay elements with a delay of 1 and at least one multiplier, wherein all delay elements with a delay of 1 are replaced by delay elements with a delay of N and the sampling rate of fS′=fs/N with fs being the sampling rate of the input signal. Preferably the multiplier included in the structure of the allpass filter of order x comprises N-time multiplex multiplication coefficients that are used in a predetermined order.

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