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Electronics and Communication Digital Communication Difficulty: Medium

If the signal $$x\left( t \right) = {{\sin \left( t \right)} \over {\pi t}} * {{\sin \left( t \right)} \over {\pi t}}$$ with $$ * $$ denoting the convolution operation, then x(t) is equal to Consider a sample signal \[y\left( t \right) = 5 \times {10^{ - 6}}x\left( t \right)\sum\nolimits_{ - \infty }^{ + \infty } {\delta \left( {t - n{T_s}} \right)} \] where x(t) = 10cos(8π × 10 3 )t and T s =100 μsec. When y(t) is passed through an ideal lowpass filter with a cutoff frequency of 5 kHz, the output of the filter is In a MOSFET operating in the saturation region, the channel length modulation effect causes A source generates one of the five symbols s 1 , s 2 , s 3 , s 4 and s 5 once in every $$\frac{1}{{60}}$$ second. The symbols are assumed to be independent and occur with probabilities $$\frac{1}{4},\,\frac{1}{4},\,\frac{1}{4},\,\frac{1}{8}\& \frac{1}{8}.$$ The average information rate of the source in bits/second is: Diamagnetic materials possess