TY - JOUR
T1 - The large sample performance of a maximum likelihood method for OFDM carrier frequency offset estimation
AU - Cheng, Fei
AU - Cheng, Qi
PY - 2013
Y1 - 2013
N2 - This paper is concerned with the performance analysis of a blind method for carrier frequency offset (CFO) estimation in OFDM systems. The method generates a maximum likelihood CFO estimate when message-carrying symbols and channel are assumed nonrandom. It has been observed in simulation that, when a large number of OFDM blocks are in use under noisy scenarios, the performance of the method does not achieve the corresponding Cramer-Rao lower bound (CRB) and is lower bounded by another (larger) CRB when symbols are assumed random. This phenomenon is caused by the inconsistency of nonrandom symbol estimates and is further verified by using first-order perturbation analysis and comparison with the two CRBs.
AB - This paper is concerned with the performance analysis of a blind method for carrier frequency offset (CFO) estimation in OFDM systems. The method generates a maximum likelihood CFO estimate when message-carrying symbols and channel are assumed nonrandom. It has been observed in simulation that, when a large number of OFDM blocks are in use under noisy scenarios, the performance of the method does not achieve the corresponding Cramer-Rao lower bound (CRB) and is lower bounded by another (larger) CRB when symbols are assumed random. This phenomenon is caused by the inconsistency of nonrandom symbol estimates and is further verified by using first-order perturbation analysis and comparison with the two CRBs.
UR - http://handle.uws.edu.au:8081/1959.7/528858
U2 - 10.1007/s11277-013-1010-6
DO - 10.1007/s11277-013-1010-6
M3 - Article
SN - 0929-6212
VL - 72
SP - 227
EP - 244
JO - Wireless Personal Communication
JF - Wireless Personal Communication
IS - 1
M1 - 1
ER -