Can anyone please tell how to find bit error rate or symbol error rate in comparing two text files

I am sending a large text file from one point to other using visible light communication. I need to compare the text file received on the receiver and compute the bit error rate during transmission . Please guide me how to do this

Answer 1

[Iain]

if you "bitxor" the pristine (transmitted) file with the recieved file, you'll get mostly zeros (which indicate no issues) and some nonzeros.

Each nonzero result is at least one bit error, (1, 2, 4, 8, 16, 32, 64, 128 all indicate one bit error, other values, you'll need to work out if they're 2,3, 4, 5, 6, 7, or 8 bit errors. (e.g. 255 would be 8)

Once you calculate how many bit errors you have, you can divide it by the number of bits sent.

Answer 2

[Reham Darwish]

how can you transmit file by visible light communication Bilal please?