A comparison is made among normal AM, wide-band analog FM, and PCM as applied to transmission of real-time TV pictures via an electrooptic space communication system. The comparison is based on the requirement to receive a subjectively noise-free TV picture. Based on the results of this comparison, it is concluded that analog-FM subcarrier modulation is the best practical choice for transmission of real-time TV pictures in space via a laser beam. In addition to providing performance equivalent to that of coherent PCM, this type of modulation can be implemented with comparatively simple equipment.
Comparison of Electrooptic Modulation Methods
IEEE Transactions on Aerospace and Electronic Systems ; AES-4 , 6 ; 874-878
01.11.1968
1957522 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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