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Mubasher


Active since 2012

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Question


is any synchronization required for converting bandpass modulated signal to passband modulated signal
i have written this code which up converts baseband fsk modulated signal to passband then down convert it to baseband then demo...

11 years ago | 0 answers | 0

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Question


why fft of modulated signal shows peak at carrier frequency?
the fft of fsk modulated signal should show only two peaks , one for "1" and other for "0" but my result shows one peak at ...

12 years ago | 0 answers | 0

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Question


What is the default carrier frequency and bit rate in fskmod, pskmod or qammod?
In old block that is dmod these things were controlled by user but in newer blocks they dont have these paremeters.

12 years ago | 0 answers | 0

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Question


Why while using sound function in matlab sound has noise in it?
I have modulated and demodulated a sound file and i have bit error rate of zero. Then why output sound is distorted? clear...

12 years ago | 1 answer | 0

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answer

Question


I NEED HELP WITH THIS CODE?
Index exceeds matrix dimensions. Error in ==> wavplay at 56 y = varargin{1}; Error in ==> Untitled at 22 wavplay('Bird')...

12 years ago | 1 answer | 0

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Question


I have written a code please help me in getting the output .
When i run this code i got a warninig that data cliped during write to file. Please sugggest something. clear; clc; ...

12 years ago | 2 answers | 0

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Question


please check this code .. im getting error that frequency should be less than Fs/2....
clear; clc; M=2^50; freq_sep=100; nsamp=6; y=wavread('voice','native'); x=fi(y); z=bin(x); m=str...

12 years ago | 1 answer | 0

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Question


fskmod
In fskmod function M is the alphabet size which must be power of 2. What does alphabet size means?

12 years ago | 1 answer | 0

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Question


Can analog to digital conversion is implemented in matlab (not simulink)?
clear; clc; data_size=100; M=2; freq_sep=500; nsamp=6; fs=10000; y=wavread('voice'); partition=[-...

12 years ago | 2 answers | 0

2

answers

Question


I have a matix having binary numbers [001;011;111;111] . How can i convert it to a matrix like [0 0 1 0 1 1 1 1 1 1 1 1]? I want to modulate but could not understand how to modulate the first matrix so i need to convert it into a bitstream. So please help
clear; clc; data_size=100; M=2; freq_sep=500; nsamp=6; fs=10000; n=2; y=wavread('voice'); partit...

12 years ago | 1 answer | 0

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Question


How can i modulate an audio file of "WAV" format? I have used "read" command but the problem is that matrix of audio file does not contain data as binary so it cant be digitally modulated?
a

12 years ago | 0 answers | 0

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Question


How to implement nise of specific bandwidth?
a

12 years ago | 1 answer | 0

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Question


please help me in ploting the modulated signal.
clear; clc; data_size=10; M=2; freq_sep=250; nsamp=10; fs=500; data=randi([0 1],1,data_size); qam_mod=qam...

12 years ago | 0 answers | 0

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Question


i am calculating bit error rate for bpsk modulation scheme. i get error that matrix size of transmitted and received data is not equal. how can i fix it? code is attached in body. Please anybody can help me out.
clc;clear all;close all; mat=randint(1,1000); sig1=(2*mat)-1; % mat converted to matrix of 1 and -1 ...

12 years ago | 0 answers | 0

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Question


How to implement partial band noise jamming in matlab?
I am intended to implement communications schemes in the presence of jammming. So how can i implement jaming in matlab? [Merg...

12 years ago | 1 answer | 0

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