undefined function or variable bits---UMFC vs ODFM

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

[Walter Roberson]

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

[Walter Roberson]

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)

Answer 1

[Samatha Aleti]

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); 

[kenny Ade]

Thanks Samatha Aleti. You are the best! Works fine!