help me write the code

Given a sinusoidal waveform with frequency of 100Hz x(t)=4.5sin(2π×100t)), sampled at 8 kHz, Write a MATLAB program to quantize the x(t) using 4-bits to obtain and plot the quantized signal x_q, assuming that the signal range is from -5 to 5 volts Calculate the SNR due to quantization using the MATLAB program

[Grace Rotich]

The function below performs signal quantization decoding. Here X-min will be -5 and X-max will be +5. The function is named decodingquant and is added to the path of the software. It will be called in the main program. The bits will be 6 bits since we are using a 6 bit bipolar quantizer.

function deout = decodingquant(bits,Xmin,Xmax,I) le=2*bits; delta=(Xmax-Xmin)/le; deout=Xmin+I*delta; %the following function performs signal quantization decoding.

This is a code for a function named quantization that performs signal quantization:

function [I, out] = quantization(bits,Xmin,Xmax, value)

le=2*bits;

delta=(Xmax-Xmin)/le;

I=round((value-Xmin)/delta);

if I==le

    I=I-1;

end

if I<0

    I=0;

end

out=Xmin+I*delta;

The main program: This is where we will call our functions: quantization decodingquant We also initialize and write the code. This program quantizes the signal using 6-bits bipolar quantizer to obtain the to obtain the quantized signal x_q and plots the original and quantized signal.

clc clear close all Tm=1/50; %Time period of the signal fs=8000; %This is the samplig frequency T=1/fs; %The sampling time period t=0:T:2*Tm; %This the the two period-time array. signal=3.25*sin(2*pi*50*t)+1.25*cos(2*pi*100*t+pi/4); bits=6; %6 bit quantizer as asked in the question. l=length(signal); %After initializing everything, we carry out quantization Index=zeros; quadsignal=zeros; for x=1:l [Index(x), qout]=quantization(bits,-5,5,signal(x)); end % we call the function inprder to recover signal from quantized values. % also indicate the signal range:from -5 to 5. for x=1:l quadsignal(x)=decodingquant(bits,-5,5,Index(x)); end plot(t,signal,'b') hold on stairs(t,quadsignal,'r'); ylabel('Signal') % xlabel('time (s)') legend('Original ','Quantized ') %Inorder to plot original signal and quantised signal. hold off

(b) Plot the signal and quantized signal.

[Image Analyst]

@Grace Rotich Why are you telling @lloyd mukunza this? It looks like your homework problem, not a reply to Lloyd.

Answer 1

[Jos (10584)]

No ;-)

Answer 2

[Image Analyst]

I think this is what you need: http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers

Answer 3

[Udai Wasmi]

Given a sinusoidal waveform with a frequency of 100 Hz ( ) ( ) sampled at

8kHz.

a- Write a MATLAB program to quantizer

( ) using 4 bits to obtain and plot the

quantized signal , assuming the signal range is between -5 and 5 volts;

b- Calculate the SNR due to quantization

[Image Analyst]

For help on homework click here

Answer 4

[Nyein]

frequency is 100 Hz , x(t) =4.5 sin(2pi*100t) sampled at 8000Hz, Write a Matlab program to quantized x(t) using 4 bits to obtain and plot the quantized singnal xq , assuming the signal range is between -5 and 5 volts.