Data-derived symbol synchronization of MASK and QASK signals
Abstract
Multilevel amplitude-shift-keying (MASK) and quadrature amplitude-shift-keying (QASK) as signaling techniques for multilevel digital communications systems, and the problem of providing symbol synchronization in the receivers of such systems are discussed. A technique is presented for extracting symbol sync from an MASK or QASK signal. The scheme is a generalization of the data transition tracking loop used in PSK systems. The performance of the loop was analyzed in terms of its mean-squared jitter and its effects on the data detection process in MASK and QASK systems.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1974
- Bibcode:
- 1974STIN...7514926S
- Keywords:
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- Pulse Communication;
- Symbols;
- Synchronism;
- Communication Theory;
- Data Acquisition;
- Error Analysis;
- Fokker-Planck Equation;
- Signal To Noise Ratios;
- Communications and Radar