1. Given that Shannon's Law is     

 Cap = BW * log2(1+Signal/Noise)

 Write a C language program with a function that takes bandwidth (BW), Signal and Noise as arguments and returns the capacity.

 

2. The Nyquist formula gives the upper bound for the data rate of a transmission system by calculating the bit rate directly from the number of signal levels and the bandwidth of the system.

Specifically, in a noise-free channel, Nyquist tells us that we can transmit data at a rate of up to bits per second, where B is the bandwidth (in Hz) and M is the number of signal levels.

Cap= 2B log2(M)

 Write another version of your program to calculate capacity according to the Nyquist formula.

3.  The fields in a PPP header are as follows (source: Point to Point Protocol Structure) (Alternate source: TCPI Guide.com)

 

Name	Number of bytes	Description
Flag	1	0x7E, the beginning of a PPP frame
Address	1	0xFF, standard broadcast address
Control	1	0x03, unnumbered data
Protocol	2	PPP ID of embedded data
Information	variable (0 or more)	datagram
Padding	variable (0 or more)	optional padding
Frame Check Sequence	2	frame checksum
Flag	1	0x7E, omitted for successive PPP packets

 

Using the correct data types (this is essential to the assignment), design a data structure in C language that would represent this frame.  Please use 10 bytes for the information and 5 bytes for the padding.