anyone help to fix it? Array formation and parentheses-style indexing with objects of class 'comm.OFDMModulator' is not allowed. Use objects of class 'comm.OFDMModulator' only as scalars or use a cell array.

I'm writing the following lines and getting above error

numSC = 128; % Number of OFDM subcarriers

cpLen = 32; % OFDM cyclic prefix length

ofdmMod = comm.OFDMModulator('FFTLength',numSC,'CyclicPrefixLength',cpLen);

ofdmDemod = comm.OFDMDemodulator('FFTLength',numSC,'CyclicPrefixLength',cpLen);

channel = comm.AWGNChannel('NoiseMethod','Variance', ...

'VarianceSource','Input port');

txSig1 = ofdmMod(st1); % where st1 is matrix of 117 by 1 complex double

Answer 1

[Steven Lord]

If you're using a release prior to release R2016b, I believe you will need to call step on the object to perform the operation on the data as stated in the Note at the top of the current release's documentation page for the comm.OFDMModulator object.