Документация

% Specify input parameters for waveform generation
numPackets = 10;    % Number of packets to generate
sps = 16;           % Samples per symbol
messageLen = 2000;  % Length of message in bits
phyMode = 'LE1M';   % Select one mode from the set {'LE1M','LE2M','LE500K','LE125K'};
channelBW = 2e6;    % Channel spacing (Hz) as per standard

% Create a spectrum analyzer object
specAn = dsp.SpectrumAnalyzer('SpectrumType','Power density');

% Define symbol rate based on the PHY mode
if any(strcmp(phyMode,{'LE1M','LE500K','LE125K'}))
    symbolRate = 1e6;
else
    symbolRate = 2e6;
end
specAn.SampleRate = symbolRate*sps;

% Create a time scope object
timeScope = dsp.TimeScope('SampleRate', symbolRate*sps,'TimeSpanSource','Auto',...
     'ShowLegend',true);

rng default;

% Loop over the number of packets, generating a BLE waveform and plotting
% the waveform spectrum
for packetIdx = 1:numPackets
    message = randi([0 1],messageLen,1);    % Message bits generation
    chanIndex = randi([0 39],1,1);          % Channel index decimal value

    if(chanIndex >=37)
        % Default access address for periodic advertising channels
        accessAdd = [0 1 1 0 1 0 1 1 0 1 1 1 1 1 0 1 1 0 0 ...
                            1 0 0 0 1 0 1 1 1 0 0 0 1]';
    else
        % Random access address for data channels
        % Ideally, this access address value should meet the requirements specified in
        % Section 2.1.2 of the Bluetooth specification.
        accessAdd = [0 0 0 0 0 0 0 1 0 0 1 0 0 ...
            0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1]';
    end

    waveform = bleWaveformGenerator(message,...
                                    'Mode',phyMode,...
                                    'SamplesPerSymbol',sps,...
                                    'ChannelIndex',chanIndex,...
                                    'AccessAddress',accessAdd);

    specAn.FrequencyOffset = channelBW*chanIndex;
    specAn.Title = ['Spectrum of ',phyMode,' Waveform for Channel Index = ', num2str(chanIndex)];

    tic
    while toc < 0.5 % To hold the spectrum for 0.5 seconds
        specAn(waveform);
    end

    % Plot the generated waveform
    timeScope.Title = ['BLE ',phyMode,' Waveform for Channel Index = ', num2str(chanIndex)];
    timeScope(waveform);
end

% Release objects
release(specAn);
release(timeScope);