site:www.edaboard.com wimax physical layer matlab
The estimated channel impulse response (CIR) can be calculated as follows:
h(i)=x(i)/L(i)
where i = 0, 1, ... , 51.
x(i) input signals OFDM-preamble
L(i) - long training symbol include 52 subcarriers
L = {1,1,-1,-1,1,1,-1,1,-1,1,1,1,1,1,1,-1,-1,1,1,-1,1,-1,1,1,1,1,
1,-1,-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,1,1,1,1}
The OFDM channel equalization algorithm is:
a(i)=x(i)/h(i)
a(i) is the equalized output signal.