An efficient multichannel FFT demodulator
Abstract
A multichannel binary FSK demodulator for spaceborne application has been implemented using an efficient preweighted and thinned fast Fourier transform (FFT) algorithm. Theory, configuration, and performance are described and compared with the analog unit which performs the same functions. Being able to perform the first base 16 pass with add-only operations following preweighting, provided the complexity reduction which made it feasible to use the FFT to perform the channelization and predetection filtering.
- Publication:
-
NASA STI/Recon Technical Report A
- Pub Date:
- November 1978
- Bibcode:
- 1978STIA...7938717V
- Keywords:
-
- Algorithms;
- Demodulators;
- Fast Fourier Transformations;
- Frequency Shift Keying;
- Multichannel Communication;
- Transmission Efficiency;
- Binary Codes;
- Computer Programs;
- Data Transmission;
- Signal Processing;
- Space Communications, Spacecraft Communications, Command and Tracking