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How to convert binary sequence into phased waveform?

조회 수: 11 (최근 30일)
Basmah Ahmad
Basmah Ahmad 2024년 1월 19일
답변: Hassaan 2024년 1월 19일
I want to convert this following sequence :
Goldseq = comm.GoldSequence('FirstPolynomial','x^6+x^5+1', 'FirstInitialConditions',[ 0 0 0 0 0 1], 'SecondPolynomial','x^6+x^5+x^4+x+1', 'SecondInitialConditions',[0 0 0 0 0 1], 'Index',1, 'SamplesPerFrame',63);
into the phased waveform like shown below:
sWF = phased.RectangularWaveform('SampleRate',fs,'PulseWidth',1e-4,'PRF',5000.0);

답변 (1개)

Hassaan
Hassaan 2024년 1월 19일
% Define the Gold sequence generator with the specified polynomials and initial conditions
goldseq = comm.GoldSequence('FirstPolynomial','x^6+x^5+1', 'FirstInitialConditions',[0 0 0 0 0 1], ...
'SecondPolynomial','x^6+x^5+x^4+x^1+1', 'SecondInitialConditions',[0 0 0 0 0 1], ...
'Index',1, 'SamplesPerFrame',63);
% Generate the Gold sequence
binarySequence = goldseq();
% Convert the binary sequence to a bipolar sequence (-1 and 1)
bipolarSequence = 2 * binarySequence - 1;
% Define the sample rate and pulse width
fs = 1e4; % Sample rate in Hz
pulseWidth = 1e-4; % Pulse width in seconds
% Create a phased rectangular waveform object
phasedWaveform = phased.RectangularWaveform('SampleRate',fs,'PulseWidth',pulseWidth,'PRF',5000);
% Generate the samples for one pulse
onePulse = phasedWaveform();
% Allocate a vector to store the phased waveform
phasedWaveformSequence = zeros(length(onePulse)*length(bipolarSequence), 1);
% Construct the phased waveform by modulating the rectangular pulse with the bipolar sequence
for i = 1:length(bipolarSequence)
startIndex = (i-1)*length(onePulse) + 1;
endIndex = i*length(onePulse);
phasedWaveformSequence(startIndex:endIndex) = bipolarSequence(i) * onePulse;
end
% Now `phasedWaveformSequence` contains the phased waveform sequence
% You can plot the waveform if needed
plot(phasedWaveformSequence);
xlabel('Sample Number');
ylabel('Amplitude');
title('Phased Waveform Sequence');
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It's important to note that the advice and code are based on limited information and meant for educational purposes. Users should verify and adapt the code to their specific needs, ensuring compatibility and adherence to ethical standards.
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