ReComm
Member level 2

Dear all,
Iam working in ICI cancellation technique .
I read the following documents
www.insipub.com/ajbas/2010/5621-5629.pdf
which state in "simulation results" page 5627 that :
" It is worth mentioning that the proposed ICI cancelling demodulation also improves the system signal-to noise ratio. The signal level increases by a factor of 2, due to coherent addition, whereas the noise level is
proportional to √2 because of non coherent addition of the noise on different sub-carriers".
Can any one help me why non-coherent noise addition proportional to√2 ?
any it's communication base?
Thanks,
Iam working in ICI cancellation technique .
I read the following documents
www.insipub.com/ajbas/2010/5621-5629.pdf
which state in "simulation results" page 5627 that :
" It is worth mentioning that the proposed ICI cancelling demodulation also improves the system signal-to noise ratio. The signal level increases by a factor of 2, due to coherent addition, whereas the noise level is
proportional to √2 because of non coherent addition of the noise on different sub-carriers".
Can any one help me why non-coherent noise addition proportional to√2 ?
any it's communication base?
Thanks,