Документация

ue = struct;
ue.NULRB = 15;                  % Number of resource blocks
ue.NCellID = 10;                % Physical layer cell identity
ue.Hopping = 'Off';             % Disable frequency hopping
ue.CyclicPrefixUL = 'Normal';   % Normal cyclic prefix
ue.DuplexMode = 'FDD';          % Frequency Division Duplex (FDD)
ue.NTxAnts = 1;                 % Number of transmit antennas
ue.NFrame = 0;                  % Frame number

pucch = struct;
% Vector of PUCCH resource indices, one per transmission antenna
pucch.ResourceIdx = 0:ue.NTxAnts-1;
pucch.DeltaShift = 1;               % PUCCH delta shift parameter
pucch.CyclicShifts = 0;             % PUCCH delta offset parameter
pucch.ResourceSize = 0;             % Size of resources allocated to PUCCH

srs = struct;
srs.NTxAnts = 1;        % Number of transmit antennas
srs.SubframeConfig = 3; % Cell-specific SRS period = 5ms, offset = 0
srs.BWConfig = 6;       % Cell-specific SRS bandwidth configuration
srs.BW = 0;             % UE-specific SRS bandwidth configuration
srs.HoppingBW = 0;      % SRS frequency hopping configuration
srs.TxComb = 0;         % Even indices for comb transmission
srs.FreqPosition = 0;   % Frequency domain position
srs.ConfigIdx = 7;      % UE-specific SRS period = 10ms, offset = 0
srs.CyclicShift = 0;    % UE-cyclic shift

txGrid = [];    % Create empty resource grid

for i = 1:10    % Process 10 subframes

        % Configure subframe number (0-based)
        ue.NSubframe = i-1;
        fprintf('Subframe %d:\n',ue.NSubframe);

        % Establish if this subframe is a cell-specific SRS subframe,
        % and if so configure the PUCCH for shortened transmission
        srsInfo = lteSRSInfo(ue, srs);
        ue.Shortened = srsInfo.IsSRSSubframe; % Copy SRS info to ue struct

        % Create empty uplink subframe
        txSubframe = lteULResourceGrid(ue);

        % Generate and map PUCCH1 DRS to resource grid
        drsIndices = ltePUCCH1DRSIndices(ue, pucch);% DRS indices
        drsSymbols = ltePUCCH1DRS(ue, pucch);       % DRS sequence
        txSubframe(drsIndices) = drsSymbols;        % Map to resource grid

        % Generate and map PUCCH1 to resource grid
        pucchIndices = ltePUCCH1Indices(ue, pucch); % PUCCH1 indices
        ACK = [0; 1];                               % HARQ indicator values
        pucchSymbols = ltePUCCH1(ue, pucch, ACK);   % PUCCH1 sequence
        txSubframe(pucchIndices) = pucchSymbols;    % Map to resource grid
        if (ue.Shortened)
            disp('Transmitting shortened PUCCH');
        else
            disp('Transmitting full-length PUCCH');
        end

        % Configure the SRS sequence group number (u) according to TS
        % 36.211 Section 5.5.1.3 with group hopping disabled
        srs.SeqGroup = mod(ue.NCellID,30);

        % Configure the SRS base sequence number (v) according to TS 36.211
        % Section 5.5.1.4 with sequence hopping disabled
        srs.SeqIdx = 0;

        % Generate and map SRS to resource grid
        % (if active under UE-specific SRS configuration)
        [srsIndices, srsIndicesInfo] = lteSRSIndices(ue, srs);% SRS indices
        srsSymbols = lteSRS(ue, srs);                         % SRS seq.
        if (srs.NTxAnts == 1 && ue.NTxAnts > 1) % Map to resource grid
            % Select antenna for multiple antenna selection diversity
            txSubframe( ...
                hSRSOffsetIndices(ue, srsIndices, srsIndicesInfo.Port)) = ...
                srsSymbols;
        else
            txSubframe(srsIndices) = srsSymbols;
        end
        % Message to console indicating when SRS is mapped to the resource
        % grid.
        if(~isempty(srsIndices))
            disp('Transmitting SRS');
        end

        % Concatenate subframes to form frame
        txGrid = [txGrid txSubframe]; %#ok
end

figure;
for i = 1:ue.NTxAnts
    subplot(ue.NTxAnts,1,i);
    plot(0:size(txGrid,2)-1,sum(abs(txGrid(:,:,i)) ~= 0),'r:o')
    xlabel('symbol number');
    ylabel('active subcarriers');
    title(sprintf('Antenna %d',i-1));
end

figure;
pcolor(abs(txGrid));
colormap([1 1 1; 0 0 0.5])
shading flat;
xlabel('SC-FDMA symbol'); ylabel('subcarrier')