undefined function or variable bits---UMFC vs ODFM

Question

kenny Ade 2020-5-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522780-undefined-function-or-variable-bits-umfc-vs-odfm

评论： kenny Ade 2020-5-7

采纳的回答： Samatha Aleti

hi Peng Li,

please see the code in the link , , , http://www.mathworks.com/help/comm/examples/ufmc-vs-ofdm-modulation.html

ERROR IN UMFC ?((LINE 37)

InpData(:symIdx) = randi({0 1}, 10*bits, 1);

Code not running!!!

please assist

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Walter Roberson 2020-5-4

that code line does not exist in the link you posted.

Walter Roberson 2020-5-7

The first parameter to randi should be a numeric scalar, or else a numeric vector with two elements. So randi({0 1}, 10*bits, 1) is wrong because you are passing in a cell instead of a numeric vector, but randi([0 1], 10*bits, 1) might work to assign to inpData(:,symIdx)

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Answer 1

Samatha Aleti 2020-5-7

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https://ww2.mathworks.cn/matlabcentral/answers/522780-undefined-function-or-variable-bits-umfc-vs-odfm#answer_430877

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Hi,

I do not see the line of code you mentioned in the above link, but I assume you are pointing to the following line of code:

inpData(:,bandIdx) = bitsIn; % log bits for comparison

Here “bitsIn” is defined as a vector of bits (randomly generated) whose size depends upon number of bites per carrier “bitsPerSubCarrier” and “subbandSize”, as follows:

subbandSize = 20; % must be > 1 
bitsPerSubCarrier = 4; % 2: 4QAM, 4: 16QAM, 6: 64QAM, 8: 256QAM 
bitsIn = randi([0 1], bitsPerSubCarrier*subbandSize, 1); 