TY - GEN
T1 - On maximum likelihood estimation of channel impulse response and carrier frequency offset in OFDM systems
AU - Carvajal, Rodrigo
AU - Rivas, Karen
AU - Aguero, Juan C.
N1 - Funding Information:
The work of J. C. Agüero was supported by FONDECYT through grant No 1150954. This work was partially supported by the Advanced Centre for Electrical and Electronic Engineering (AC3E, Proyecto Basal FB0008), Chile.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/12/26
Y1 - 2017/12/26
N2 - In this paper, we address the problem of estimating channel impulse response (CIR) and carrier frequency offset (CFO) in OFDM systems utilizing the method of maximum likelihood. When the CFO is small, Moose's technique for CFO estimation is accurate and numerically efficient. However, if the CFO is high, there are no straightforward solutions for its estimation. We show that the log-likelihood function of the CIR and the CFO can be concentrated in one variable (the CFO), and that its estimation can be accurately carried out by first performing a coarse line search and then applying Newton's method at a low computational cost. We illustrate the benefits of our proposal via numerical simulations.
AB - In this paper, we address the problem of estimating channel impulse response (CIR) and carrier frequency offset (CFO) in OFDM systems utilizing the method of maximum likelihood. When the CFO is small, Moose's technique for CFO estimation is accurate and numerically efficient. However, if the CFO is high, there are no straightforward solutions for its estimation. We show that the log-likelihood function of the CIR and the CFO can be concentrated in one variable (the CFO), and that its estimation can be accurately carried out by first performing a coarse line search and then applying Newton's method at a low computational cost. We illustrate the benefits of our proposal via numerical simulations.
UR - http://www.scopus.com/inward/record.url?scp=85046472030&partnerID=8YFLogxK
U2 - 10.1109/LATINCOM.2017.8240188
DO - 10.1109/LATINCOM.2017.8240188
M3 - Conference contribution
AN - SCOPUS:85046472030
T3 - 2017 IEEE 9th Latin-American Conference on Communications, LATINCOM 2017
SP - 1
EP - 4
BT - 2017 IEEE 9th Latin-American Conference on Communications, LATINCOM 2017
A2 - Velasquez-Villada, Carlos E.
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 8 November 2017 through 10 November 2017
ER -