Up-conversion mechanism employing side lobe-selective pre-distor

Details Up-conversion mechanism employing side lobe-selective pre-distor Up-conversion mechanism employing side lobe-selective pre-distor

1996-06-25

1999-07-27

Pham, Chi H.

Pulse or digital communications

Transmitters

Antinoise or distortion

375297, 375298, H04K 102, H04L 2503

Patent

active

059303018

ABSTRACT:
An up-converter for digitally sampled baseband signals takes advantage of the sinc(x) spectral replication functionality of a DAC, using a post-DAC, band pass filter to isolate a baseband replica that falls within that sidelobe of the DAC's sinc(x) frequency response containing the desired IF. The parameters of a pre-compensation filter and the gain of a post DAC amplifier are set to compensate for the distortion and attenuation imparted by the DAC's sinc(x) frequency response.

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patent: 5351016 (1994-09-01), Dent
patent: 5396190 (1995-03-01), Murata

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