I want to do SC-FdMA modulation in MATLAB 2017a but when i open script, for its 'given example' in 'MATLAB 2017a help' I got error.

%% Perform SC-FDMA Modulation
% Perform SC-FDMA modulation of one subframe of random
% uniformly-distributed noise, using a 10MHz configuration.

%%
ue = struct('NULRB',50);
dims = lteULResourceGridSize(ue);
reGrid = reshape(lteSymbolModulate(randi([0,1],prod(dims)*2,1), ...
    'QPSK'),dims);
waveform = lteSCFDMAModulate(ue,reGrid);

got following errors

Undefined function 'lteULResourceGridSize' for input arguments of type 'struct'.

Error in PerformSCFDMAModulationExample (line 7)

dims = lteULResourceGridSize(ue);

Kindly help to resolve the issue.