TY - GEN
T1 - Training design for CFO estimation in OFDM over correlated multipath fading channels
AU - Ghogho, Mounir
AU - Swami, Ananthram
AU - Ciblat, Philippe
PY - 2007/12/1
Y1 - 2007/12/1
N2 - Carrier frequency offset (CFO) estimation is a key challenge in multicarrier systems such as OFDM. Often, this task is carried out using a preamble made of a number, say J, of repetitive-slots (RS). Here, we address the issue of optimal RS preamble design using the Cramér-Rao bound. We show that the optimal value of J is a trade-off between the multipath diversity gain and the number of unknowns to be estimated. In the case of correlated channel taps, we show that uniform power loading of the active subcarriers is not optimal (in contrast with the uncorrelated case) and a better power loading scheme is proposed. The theoretical results are supported by computer simulations.
AB - Carrier frequency offset (CFO) estimation is a key challenge in multicarrier systems such as OFDM. Often, this task is carried out using a preamble made of a number, say J, of repetitive-slots (RS). Here, we address the issue of optimal RS preamble design using the Cramér-Rao bound. We show that the optimal value of J is a trade-off between the multipath diversity gain and the number of unknowns to be estimated. In the case of correlated channel taps, we show that uniform power loading of the active subcarriers is not optimal (in contrast with the uncorrelated case) and a better power loading scheme is proposed. The theoretical results are supported by computer simulations.
U2 - 10.1109/GLOCOM.2007.534
DO - 10.1109/GLOCOM.2007.534
M3 - Conference contribution
AN - SCOPUS:39349113317
SN - 1424410436
SN - 9781424410439
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 2821
EP - 2825
BT - IEEE GLOBECOM 2007 - 2007 IEEE Global Telecommunications Conference, Proceedings
T2 - 50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007
Y2 - 26 November 2007 through 30 November 2007
ER -