This article reports on the first step in a focused program to re-optimize radio astronomy receiver architecture to better take advantage of the latest advancements in commercial digital technology. Specifically, an L-Band sideband-separating downconverter has been built using a combination of careful (but ultimately very simple) analog design and digital signal processing to achieve wideband downconversion of an RFI-rich frequency spectrum to baseband in a single mixing step, with a fixed-frequency Local Oscillator and stable sideband isolation exceeding 50 dB over a 12 degree C temperature range.
@article{arxiv.1001.5422,
title = {Experiments with calibrated digital sideband separating downconversion},
author = {Matthew A. Morgan and J. Richard Fisher},
journal= {arXiv preprint arXiv:1001.5422},
year = {2015}
}