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Explain in detail the operation of the spade system of demand assignment. What is the function of the common signalling channel?
written 8.9 years ago by gravatar for teamques10 teamques10 ★ 69k •   modified 6.0 years ago

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Explain SPADE system and SCPC of FDMA

Marks: 5 M, 10 M

Year: Dec 2014, May 2014, Dec 2012, May 2012
satellite communication and network
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written 8.9 years ago by gravatar for teamques10 teamques10 ★ 69k

Spade is an acronym for single-channel-per-carrier pulse-code-modulated multiple-access-demand-assignment equipment.

This system is extensively used with digital signals.

The distributed-demand assignment facility requires a common signalling channel. The CSC bandwidth is 160 KHz, and its centre frequency is 18.045 MHz below the pilot frequency. To provide interference with CSC, voice channels …

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