FEASIBILITY STUDY 19.2KBS IN A 3KHZ CHANNEL.
STELMA INC STAMFORD CONN
Pagination or Media Count:
The report describes a study to determine the feasibility of transmitting 19.2 kilobits per second through a schedule 4B line or TAT-2 submarine cable. The technique chosen for study was double sideband, quadrature suppressed carrier, amplitude modulation employing sixteen discrete levels of amplitude. The work performed included design and construction of a laboratory test model of the modem, and tests of the completed modem using various simulated line conditions. Typical of the results obtained in the study was an error probability of 0.005 at 14,400 bits per second at a 30db signal to noise ratio, and with delay simulation in the signal path. Transmission at 19.2 kilobits per second was not obtained, but with further work, as recommended in this report, transmission at 9.6Kb, at an error rate of 0.00001 and possibly 14.4Kb at an error rate of 0.006 is feasible. Author
- Electrical and Electronic Equipment
- Non-Radio Communications