Hi all,
My project is Digiatal Sampling correction Interpolation/Decimation for
application in flexible OFDM Modem.
I'm implementing in Matlab the 5_taps optimized interpolator which will
improve the performance for long data OFDM bursts.
I used control parameters basepoint index (m(k)) and fractional interval
(mu(k)) (reference to FM Gardners article "Interpolation In Digital
Modems---PART1: Fundamentals"):
m(k)=int[k*Ti/Ts] (1)
mu(k)=k*Ti/Ts - m(k) (2)
But I have a problem as follow:
Define e(m,0) is timing error of m-th symbol:
e(m,0) = m*(N+Ng)*SFO
where N: FFT size(=64); Ng: guard size (=16) ; SFO=(T'-T)/T
(T is sampling period at the output of IFFT, T' is sampling period at
receiver)
How can I join e(m,0) and (1),(2)? (assume perfect knowledge SFO).
Any help is greatly appreaciated.
Regards,
NQH
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