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waveconfig = [];
waveconfig.NumSubframes = 10*2; % Number of 1 ms subframes in generated waveform
waveconfig.DisplayGrids = 1; % Display the resource grids and the generated waveforms
% Define a carrier configuration object
carrier = nrCarrierConfig;
carrier.SubcarrierSpacing = 120;
carrier.NSizeGrid = 66;
% Store the carrier into the waveconfig structure
waveconfig.Carriers = carrier;
% PRACH configuration
prach = nrPRACHConfig;
prach.FrequencyRange = 'FR2'; % Frequency range ('FR1', 'FR2')
prach.DuplexMode = 'TDD'; % Duplex mode ('FDD', 'TDD', 'SUL')
prach.ConfigurationIndex = 70; % Configuration index (0...255)
prach.SubcarrierSpacing = 120; % Subcarrier spacing (1.25, 5, 15, 30, 60, 120)
prach.FrequencyIndex = 1; % Index of the PRACH transmission occasions in frequency domain (0...7)
prach.TimeIndex = 0; % Index of the PRACH transmission occasions in time domain (0...6)
prach.ActivePRACHSlot = 1; % N^RA_slot. 38.211 - 5.3.2 (0, 1)
% Store the PRACH configuration and additional parameters in the
% waveconfig structure
waveconfig.PRACH.Config = prach;
waveconfig.PRACH.AllocatedPreambles = 'all'; % Index of the allocated PRACH preambles
waveconfig.PRACH.Power = 0; % PRACH power scaling in dB
% NOTE : hNRPRACHWaveformGeneratorFR2 is modified version of the original helper function :
% hNRPRACHWaveformGenerator
[waveform,gridset,winfo] = hNRPRACHWaveformGeneratorFR2(waveconfig);
hFig=figure();
set(hFig, 'Position', [100 500 800 250]);
set(gcf,'color','w')
subplot(2,6,[1 2 7 8]);
plot(real(winfo.WaveformResources.PRACH.Resources(1).PRACHSymbols), ...
imag(winfo.WaveformResources.PRACH.Resources(1).PRACHSymbols),'ro')
daspect([1 1 1]);
axis([-15 15 -15 15]);
str = sprintf("FR2(120Khz),ConfigIndex = %d",prach.ConfigurationIndex);
title(str);
sLength = length(winfo.WaveformResources.PRACH.Resources(1).PRACHSymbols);
subplot(2,6,[3 4 5 6]);
plot(real(winfo.WaveformResources.PRACH.Resources(1).PRACHSymbols),'r-')
ylim([-15 15]);
xlim([0 sLength]);
str = sprintf("Real[PRACH] : sequence length = %d",sLength);
title(str);
subplot(2,6,[9 10 11 12]);
plot(imag(winfo.WaveformResources.PRACH.Resources(1).PRACHSymbols),'r-')
ylim([-15 15]);
xlim([0 sLength]);
str = sprintf("Real[PRACH] : sequence length = %d",sLength);
title(str);
winfo.WaveformResources.PRACH.Resources(1).PRACHIndicesInfo
sCount = length(winfo.WaveformResources.PRACH.Resources);
sList = [];
for i = 1:sCount
sList = [sList winfo.WaveformResources.PRACH.Resources(i).NPRACHSlot];
end
sList
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