mro83
Member level 5
Hi to all,
I have done some research on multicarrier CDMA for a while by using the command hadamard to generate the orthogonal spreading codes of size L=2^n in MATLAB.
I have recently seen that there might be some differences between these 3 codes.
So my questions are:
1) is there any difference between 3 spreading codes: i) Walsh ii) hadamard and iii) walsh-hadamrd codes? if yes, what? How can I generate each of them?
2) I have read that walsh-hadamrd codes doesn't exist for the length L~=4m ( in other words, L must be a multiple of 4). is it true? how can I generate walsh-hadamrd code for the length of L=60 in MATLAB?
p.s, in MATLAB, hadamrd command is usable only if L, L/12 or L/20 is integer. so it doesn't work for L=60 = 4*15 !!!!!!
Thank you in advance,
I have done some research on multicarrier CDMA for a while by using the command hadamard to generate the orthogonal spreading codes of size L=2^n in MATLAB.
I have recently seen that there might be some differences between these 3 codes.
So my questions are:
1) is there any difference between 3 spreading codes: i) Walsh ii) hadamard and iii) walsh-hadamrd codes? if yes, what? How can I generate each of them?
2) I have read that walsh-hadamrd codes doesn't exist for the length L~=4m ( in other words, L must be a multiple of 4). is it true? how can I generate walsh-hadamrd code for the length of L=60 in MATLAB?
p.s, in MATLAB, hadamrd command is usable only if L, L/12 or L/20 is integer. so it doesn't work for L=60 = 4*15 !!!!!!
Thank you in advance,