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A channel has a 1-MHz bandwidth. The SNR for this channel is 63. What is the appropriate signel level?(a) 2(b) 8(c) 4(d) 16This question was addressed to me in a job interview.This interesting question is from Layers topic in division Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

Answer»

The correct choice is (c) 4

To explain I would SAY: As a continuation to the previous question where we GET the channel capacity as 6 Mbps. For better PERFORMANCE we choose 4 Mbps. Thus we calculate L from –

4Mbps = 2 x 1 MHz x logL.



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