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Problem 1
Generate a sinusoidal signal with amplitude 1, and w = 1. Using a uniform PCM scheme, quantize it once
to 8 levels and once to 16 levels.
Plot the original signal and quantized signal on the same axis. Compare the resulting SQNRs in the two
cases.
Choose the signal to be 10 second.
Problem 2
The periodic signal x(t) has a period of 2 and interval [0,2] is defined as
x(t) = t ---------- 0 ≤ t < 1
= -t + 2 --- 1 ≤ t < 2
· Design an 8 bit-level uniform PCM quntizer for this signal and plot the qunatized output of this
system.
· Plot the qunatization error for this system
· By calculating the power in the wrror signal, determine the SQNR for this system in decibels.
Problem 3
Write an M-file to do PWM to PPM! You can also do a simulink scheme.
Use proper input signal. And verify your answer with analytical approach.
Also introduce an AWGN to the signal and recover it back to the original signal.
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∙ 14y ago
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