Generate single cycle of a sine wave at a particular frequency

Hello, I need help generating a single cycle of a sinewave at a particular frequency and sampling rate. The following example generates multiple cycles and I am not sure how to get a single cycle.

fs = 512;                    % Sampling frequency (samples per second)
dt = 1/fs;                   % seconds per sample
StopTime = 0.25;             % seconds
t = (0:dt:StopTime-dt)';     % seconds
F = 60;                      % Sine wave frequency (hertz)
data = sin(2*pi*F*t);

Thank you,

[Anil Sarode]

how to decide this stop time ? and why did you take increment as dt for t vector ?

[Image Analyst]

We don't know. Perhaps she just thought it up herself. Or perhaps StopTime was specified in the homework exercise. dt is one over the frequency. She, or you, could just as well use linspace() to create the t time vector instead of using the colon operator.

[KEERTHANA VELUSAMY]

Could any one share matlab code for storing the signals data in 2 arrays of 64 elements

[Gaurav Wadhai]

clc; 
clear all;
close all;
L = 3; %Up-sampling factor
M = 2; %Down-sampling factor 
n = 0:29;
x = sin(2*pi*0.43*n) + sin(2*pi*0.31*n); 
y = resample(x,L,M); 
subplot(2,1,1),stem(n,x(1:30)); 
xlabel('Time index n');
ylabel('Amplitude');
title('lnput Sequence'); 
m = 0:(30*L/M)-1;
subplot(2,1,2),stem(m,y(1:30*L/M));
axis([0 (30*L/M)-1 -2.2 2.21]);
xlabel('Time index n'); 
ylabel('Amplitude');
title('Output Sequence');

Answer 1

[KSSV]

fs = 512; % Sampling frequency (samples per second) 
 dt = 1/fs; % seconds per sample 
 StopTime = 0.25; % seconds 
 t = (0:dt:StopTime)'; % seconds 
 F = 60; % Sine wave frequency (hertz) 
 data = sin(2*pi*F*t);
 plot(t,data)
 %%For one cycle get time period
 T = 1/F ;
 % time step for one time period 
 tt = 0:dt:T+dt ;
 d = sin(2*pi*F*tt) ;
 plot(tt,d) ;

[Swetha]

This is great! Thank you.

[KSSV]

Thanking is accepting the answer...

Answer 2

[anasuya b]

I wante to make a sine wave . First donot know how to create vector how to create a vector for a sample data of 300 in 5 min time (300 sec) PL help

Answer 3

[Fahad Hossen]

fs = 512; % Sampling frequency (samples per second) dt = 1/fs; % seconds per sample StopTime = 0.25; % seconds t = (0:dt:StopTime)'; % seconds F = 60; % Sine wave frequency (hertz) data = sin(2*pi*F*t); plot(t,data) %% For one cycle get time period T = 1/F ; % time step for one time period tt = 0:dt:T+dt ; d = sin(2*pi*F*tt) ; plot(tt,d) ;

Answer 4

[Qammar Taskeen]

Generate the following signals in MATLAB using subplot command such that the x-axis title contains your UET (2 Fig Roll No.) and y-axis title contains your APCOMS (4 Fig Roll No) while the title of the plot shows your Name and Batch No. (CLO-01, PLO-5) (25 Marks)

• Sinusoid
• Kronecker Delta
• Unit step signal
• Ramp

Complex Exponential

Answer 5

[Qammar Taskeen]

Demonstrate the designing of a circuit in MATLAB Simulink such that it represents the equation sin2 φ + cos2 φ = 1 where φ = UET (2 Fig Roll No.) the output should have an amplitude of 1 on the “scope”. Save the .mdl file and attach it in the online submission of this assignment. Also add its screenshot in the assignment.

Answer 6

[Qammar Taskeen]

Demonstrate the generation of a Saw Tooth wave from its Fourier Series in MATLAB such that the x-axis title contains your UET (2 Fig Roll No.) and y-axis title contains your APCOMS (4 Fig Roll No) while the title of the plot shows your Name and Batch No.

Answer 7

[Qammar Taskeen]

Find and Demonstrate the inverse Z-Transform of following. Here a and b are the two digits of your UET (2 Fig Roll No.) whereas c, d, e and f represent the 4-digits of your APCOMS (4 Fig Roll No).

Answer 8

[Sanjay Talbar]

fs = 512; % Sampling frequency (samples per second)

dt = 1/fs; % seconds per sample

StopTime = 0.25; % seconds

t = (0:dt:StopTime-dt)'; % seconds

F = 60; % Sine wave frequency (hertz)

data = sin(2*pi*F*t);

Answer 9

[HARSH VARDHAN]

Q1. Write A Matlab code

a) To Generate the following frequency signals and play as audio tones for each one second duration.

Sa

Re

Ga

Ma

Pa

Da

Ni

Sa

240Hz

270Hz

300Hz

320

360Hz

400Hz

450Hz

480Hz

b) To Create a variable to store the following tune and also play the audio tone for following sequences : Sa Re Sa Re| Sa Re Ga Ma| Sa Ni Sa NI |Sa Ni Da Pa

c) Also show the amplification and attenuation of the above generated tone

Q2. Write a Matlab code

a) to read the given input signal data from Microsoft Excel sheet and store the same.

b) to display the graph of above stored date.

c) to perform the following signal operations on the input signal

i. x(2t-1)

ii. 2*x(4+t)

iii. x(2-0.5t)

iv. (2/3)*x(2+0.5t)