Interpolation filter circuit

Details Interpolation filter circuit Interpolation filter circuit

2005-03-22

2005-03-22

Deppe, Betsy L. (Department: 2637)

Pulse or digital communications

Equalizers

C375S377000, C341S061000, C708S313000

Reexamination Certificate

active

06870879

ABSTRACT:
Interpolation filter circuit for a digital communication device for the filtering and clock-rate conversion of a digital input signal received from a data source with a symbol-clock data rate, having(a) an FIR filter (4), which filters the digital input signal received with the symbol-clock data rate in such a way that, in the passband frequency range of the interpolation filter circuit (1), the power spectral density characteristic of the filtered digital output signal emitted by the interpolation filter circuit essentially coincides with a prescribed desired characteristic of the power spectral density PSDdes;(b) a resampling filter (6) connected downstream of the FIR filter (4) for increasing the clock data rate of the digital input signal filtered by the FIR filter (4);and having (c) an IIR filter (8), which is connected downstream of the resampling filter and filters the resampled digital signal emitted by the resampling filter (6) in such a way that, in the cutoff frequency range of the interpolation filter circuit (1), the power spectral density characteristic of the filtered digital output signal emitted by the interpolation filter circuit essentially coincides with the prescribed desired characteristic of the power spectral density PSDdes.

REFERENCES:
patent: 4192008 (1980-03-01), Mandeville
patent: 4552992 (1985-11-01), Bruckert et al.
patent: 4561012 (1985-12-01), Acampora
patent: 5757683 (1998-05-01), Deczky
patent: 6411657 (2002-06-01), Verbin et al.
patent: 30 44 208 (1981-10-01), None
Eugene B. Hogenauer: “An Economical Class of Digital Filters for Decimation and Interpolation”, IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-29, No. 2, Apr. 1981, pp. 155-162.
Allan V. Oppenheim: “Zeitdiskrete Signalverarbeitung” [discrete-Time Signal Processing], 3rded., Oldenbourg Verlag, München, 1999, pp. 136, 376-377.
Norbert Fliege: “Multiraten-Signalverarbeitung Theorie und Anwendungen” [multi rate signal processing theory and practice], Teubner Verlag, Stuttgart, 1993, pp. 32-33.

Affiliated with

Also associated with

Rating

Interpolation filter circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interpolation filter circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interpolation filter circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3412517