dsp

3. What is the value of d[0], such that d[n] is the unit impulse function?
7. What is the nature of the following function: y[n] = y[n-1] + x[n]?
9. The system described by the input-output equations y(n)=x2(n) is a Non-linear system.
10. Is the function y[n] = y[n-1] + x[n] ...... in nature?
11. Is the function y[n] = x[n-1] – x[n-56] ...............
14. If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be
15. We define y[n] = nx[n] – (n-1)x[n]. Now, z[n] = z[n-1] + y[n], is z[n] stable?
16. The output signal when a signal x(n)=(0,1,2,3) is

1. If n tends to infinity, is the accumulator function an unstable one?
2. Comment on the causality of the following discrete time system: y[n] = x[-n].
4. Comment on the time invariance of the following discrete system: y[n] = x[2n+4].
5. Is the function y[n] = sin(x[n]) periodic or not?
6. If a system do not have a bounded output for bounded input, then the system is said to be:
8. The block denoted as (z^-1)follows is ......
12. Zero in zero out.....function described
13. The system described by the input-output equation y(n)=nx(n)+bx3(n) is ...