True white noise can never exist in a physical system. The noise bandwidth of si

Question

True white noise can never exist in a physical system. The noise bandwidth of simple RC filter is equal to its cutoff frequency. The noise figure of an amplifier usually depends on the source resistance driving the amplifier Alias distortion results from a non-flat passband shape in the reconstruction filter Pulses can exist that are both band-imited and ISI-free. A matched filter is designed to match the PSD of the incoming noise. Delta modulation is a from of PAM in which the pulse shapes are triangular. Any cumulative distribution function (CDF) is monotone increasing, A random message sent in Manchester code (biphase format) passes higher frequencies through the channel than the same message sent in bipolar NRZ format. If the ensemble mean of a random process is constant over time, the process can be considered ergodic.

Explanation / Answer

1.True.True white noise has to effect all the frequencies equally. But practically its not possible.

2.True.statement is true.

3.True.noise figure depends on source resistance driving the amplifier because for small values of Rs,noise figure decreases but large values of Rs increases.

4.True.we can't realize a ideal reconstruction filter.

5.True.we can't realize infinite bandwidth pulse they are band limited that's why they are isi free.

6.True.to maximize signal and to lower the noise effect,matched filter is designed to match PSD of input noise.

7.True. Statement is true.

8.True.It won't decrease because all pdf are added to new pdf.so it will be increasing.

9.True.Manchester code will occupy large bandwidth compared to NRZ.

10True.statement is true.

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