i get an error when i try to define type of modulation

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Ray
Ray 2015-12-4
评论： Walter Roberson 2015-12-5
This expression'
mod_methods = ('BPSK','QPSK','8PSK','16QAM','32QAM','64QAM');
gives me this error
Expression or statement is incorrect--possibly unbalanced (, {, or [.

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Walter Roberson
Walter Roberson 2015-12-4
mod_methods = {'BPSK','QPSK','8PSK','16QAM','32QAM','64QAM'};
  2 个评论
Ray
Ray 2015-12-4
编辑：Walter Roberson 2015-12-5
Thanks for the answer. I also have an error for the following line:
rec_syms = knnsearch([real(symbol_book) imag(symbol_book)], [real(X_hat) imag(X_hat)]) - 1;
Error using KDTreeSearcher/knnsearch (line 74)
Y must be a matrix with 8 columns.
Error in knnsearch (line 142)
idx = knnsearch(O,Y,'k',numNN, 'includeties', includeTies);
Error in OFDM_image (line 139)
rec_syms = knnsearch([real(symbol_book) imag(symbol_book)], [real(X_hat) imag(X_hat)]) - 1;
Walter Roberson
Walter Roberson 2015-12-5
[real(symbol_book) imag(symbol_book)] together makes a matrix with 8 columns, such as if there are 4 columns in symbol_book. But [real(X_hat) imag(X_hat)], the locations to search for, does not have 8 columns. The locations to search for (the second parameter) must have the same number of columns as the first parameter.

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