Distortionless frequency-shift keying - Further results
Abstract
It was previously shown that digital frequency-shift signals could in principle be recovered without intersymbol interference (ISI), and a narrowband characteristic for binary FSK was derived. The theory is now extended to cover both multilevel FSK and wideband FSK carried over lowpass channels. In all cases, channel characteristics can be found which yield zero ISI in the signal after frequency demodulation. It is shown that for a given information rate, the bandwidth required is minimized by use of 4-level FSK.
- Publication:
-
Electronics Letters
- Pub Date:
- November 1975
- DOI:
- 10.1049/el:19750461
- Bibcode:
- 1975ElL....11..605O
- Keywords:
-
- Frequency Shift Keying;
- Intersymbolic Interference;
- Signal Distortion;
- Bandwidth;
- Binary Data;
- Digital Data;
- Fourier Transformation;
- Frequency Modulation;
- Pulse Communication;
- Communications and Radar