Question: Question 5 : Project 3 ( 2 0 points ) In Project 3 , we have lbs = array ( [ - 1 , -

Question

5

: Project

3 (20

points

)

In Project

3,

we have lbs

=

array

([- 1, - 1, 1, 1, -, - 1, - 1, - 1, - 1, 1])

and

Q b s =

array

([1, 1, 1, 1, 1, - 1, 1, - 1, - 1, 1]) .

Set a reasonable noise level.

Sketch the waveforms of corresponding carries of

\frac{I}{Q}

channels, Ibs,

Q b s, B P S K

over

\frac{I}{Q}

channels and QPSK modulation signal.

Sketch the spectra of BPSK and QPSK modulation signals, respectively. Provide your observations on the two spectra. Indicate where the noise is located in the spectra.

Explain the algorithm, mathematically, to demodulate lbs using the following codes.

Question 5 : Project 3 ( 2 0 points ) In Project

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