A system and method for estimating sample clock frequency offset
(.epsilon..sub.s) in a digital radio mondiale (DRM) system such as, for
example, DRM receivers. The system and method includes using a
relationship given by the following equation:
s = linearfit ( angle ( P G m P G_tr m P G m
- cycle P G_tr m - cycle ) , l ) .times. N 2
.pi. .times. cycle .times. ( N + L ) wherein the P.sub.Gm is the
gain pilot received in the m.sup.th symbol and P.sub.G.sub.--.sub.trm is
the gain pilot transmitted in the m.sup.th symbol, the P.sub.Gm-cycle is
the gain pilot received in (m-cycle).sup.th symbol, the
P.sub.G.sub.--.sub.trm-cycle is the second gain pilot transmitted in
(m-cycle).sup.th symbol, the l is the index of the sub-carrier associated
with the gain pilot, the N is a factor of a sample point number of a
useful symbol, the L is a sample point number of a guard interval, and
the cycle is the interval of two symbols which are inserted gain pilots
at the same sub-carriers (l).