Title :
A New Frequency-Division Radiotelegraph Multiplex System (MADFAS)
Author_Institution :
Italcable, Rome, Italy
fDate :
12/1/1961 12:00:00 AM
Abstract :
A frequency-division multiplex system (MADFAS) is described for operation at HF with less bandwidth than is commonly allowed. The reduction in required bandwidth is achieved by using oscillators with greater frequency stability, and signaling by FSK with the minimum frequency shift compatible with the keying speed. Details on the design and operational characteristics of the system are presented.
Keywords :
Automatic frequency control; Bandwidth; Circuits; Filters; Frequency conversion; Frequency division multiplexing; Frequency shift keying; Oscillators; Radio transmitters; Stability;
Journal_Title :
Communications Systems, IRE Transactions on
DOI :
10.1109/TCOM.1961.1097729
