List the four criteria that need to be considered when finding the maximum output signal to quantization noise ratio (SQNR) for a Delta Modulator.
What will be an ideal response?
To find the maximum output signal to quantization noise ratio (SQNR) for a Delta Modulator, the following criteria need to be taken into the account:
a. There is no slope-overload for sinusoidal signal
b. The quantization error is uniformly distributed over [-?s/2, ?s/2] where ?s is the step size of quantization (staircase)
c. The standard deviation of the error is flat during the time interval of one-bit quantization
d. The message bandwidth (fc) is equal to the bandwidth of the low-pass filter in Delta Modulator decoder
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