Synchronizing Equipment for Use with the Complex-Modulated-Pulse Demodulator
Abstract
The need for a general system for the demodulation of complex pulse modulations has been felt for some time. Such a system has been developed, and has been described in NRL Reports 4463 and 4574. Since the publication of these reports operational groups have expressed the desire for auxiliary equipment to provide for synchronization of present equipment with certain types of pulse systems. Equipment existing until now demodulated only those signals having sync pulses of higher amplitude than the information pulses. A new Pulse-Width and Pulse-Group Synchronizer has been developed. Its purpose is to derive synchronization from sync pulses which differ from other pulses not in amplitude , but with respect to some other pulse parameter. Synchronization can now be derived from pulses that are wider than the signal pulses or from groups of two or three pulses with interpulse spacing of from 0.3 to 20 sec. Recommendations are made for further improvement of existing circuits.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 09, 1957
- Accession Number
- AD1223282
Entities
People
- Julian C. Holmes
Organizations
- United States Naval Research Laboratory