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Electronics and Communication Microwave Communication Difficulty: Medium

Let P be linearity, Q be time-invariance, R be causality and S be stability. A discrete-time system has the input-output relationship, \[y\left( n \right) = \left\{ {\begin{array}{*{20}{c}} {x\left( n \right),}&{n \geqslant 1} \\ {0,}&{n = 0} \\ {x\left( {n + 1} \right)}&{n \leqslant - 1} \end{array}} \right.\] Where x(n) is the input and y(n) is the output. The above system has the properties When three wave components co-propagate at angular frequency w1, w2, w3, then a new wave is generated at frequency w4, which is given by? The number 10000 would appear just immediately after IS-136 uses which modulation technique? The circuit shown in the figure is a