Title :
Techniques for transmitting digital data on the spacelab´s analog video channel
Author :
Smith, Dean Lance ; Hanby, Walter D.
Author_Institution :
Dept. of Electr. Eng., Memphis State Univ., TN, USA
fDate :
5/1/1993 12:00:00 AM
Abstract :
A study was made of various techniques for transmitting digital data over a composite video channel, with data from experiments on the Space Shuttle Orbiter in mind. Broadcast television telecommunications schemes and other techniques described in the literature were reviewed and compared. PSK (phase shift keying) MPSK (M-ary PSK), and or PAM (pulse amplitude modulation), which can be transmitted on visible lines of a frame, unassigned lines of the VBI (vertical blanking interval), or during the HBI (horizontal blanking interval), were all judged attractive under the proper conditions. However, PAM on visible lines or during the VBI should be relatively easy to implement, provide adequate average data rates, and give acceptable BERs (bit error rates).<>
Keywords :
digital communication systems; phase shift keying; pulse amplitude modulation; space communication links; television broadcasting; video signals; MPSK; PAM; PSK; Space Shuttle Orbiter; analog video channel; bit error rates; broadcast TV; composite video channel; digital data; horizontal blanking interval; noise; phase shift keying; pulse amplitude modulation; telecommunications; vertical blanking interval; visible lines; Amplitude modulation; Bit error rate; Blanking; Channel capacity; Digital video broadcasting; Electron beams; Phase shift keying; Pulse modulation; Space shuttles; TV broadcasting;
Journal_Title :
Aerospace and Electronic Systems Magazine, IEEE
