A simple method for sampling in-phase and quadrature components
Abstract
A method is presented for developing in-phase and quadrature samples of a band-limited RF waveform. The problem of matching gain and phase response differences between the two components is avoided by a combination of mixing to an IF frequency, sampling and digitizing, and digital filtering. The novelty of the method is in the design of the digital filter, which is realized as a pair of 90 deg phase splitting networks with several symmetries which are exploited to save computation.
- Publication:
-
IEEE Transactions on Aerospace Electronic Systems
- Pub Date:
- November 1984
- DOI:
- 10.1109/TAES.1984.310466
- Bibcode:
- 1984ITAES..20..821R
- Keywords:
-
- Data Sampling;
- Digital Filters;
- Phase Matching;
- Quadratures;
- Radio Signals;
- Signal Mixing;
- Down-Converters;
- Intermediate Frequencies;
- Phase Shift Circuits;
- Power Gain;
- Signal Processing;
- Communications and Radar