TY - GEN
T1 - Phase noise and carrier frequency offset in OFDM systems
T2 - 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013
AU - Salim, Omar Hazim
AU - Nasir, Ali A.
AU - Mehrpouyan, Hani
AU - Xiang, Wei
PY - 2013
Y1 - 2013
N2 - In this paper, a new iterative pilot-aided algorithm based on expectation conditional maximization (ECM) for joint estimation of Wiener phase noise (PHN) and carrier frequency offset (CFO) in orthogonal frequency division multiplexing (OFDM) systems is proposed. Next, a new expression for the hybrid Cramér-Rao lower bound (HCRB) for joint estimation of PHN and CFO in OFDM systems is derived. Numerical results show that the proposed estimator outperforms existing algorithms in terms of mean square error while performing close to the derived HCRB at moderate PHN variances. Moreover, the proposed estimator is found to be computationally more efficient than existing algorithms since it jointly estimates PHN and CFO in a few iterations.
AB - In this paper, a new iterative pilot-aided algorithm based on expectation conditional maximization (ECM) for joint estimation of Wiener phase noise (PHN) and carrier frequency offset (CFO) in orthogonal frequency division multiplexing (OFDM) systems is proposed. Next, a new expression for the hybrid Cramér-Rao lower bound (HCRB) for joint estimation of PHN and CFO in OFDM systems is derived. Numerical results show that the proposed estimator outperforms existing algorithms in terms of mean square error while performing close to the derived HCRB at moderate PHN variances. Moreover, the proposed estimator is found to be computationally more efficient than existing algorithms since it jointly estimates PHN and CFO in a few iterations.
UR - http://www.scopus.com/inward/record.url?scp=84885774837&partnerID=8YFLogxK
U2 - 10.1109/SPAWC.2013.6612130
DO - 10.1109/SPAWC.2013.6612130
M3 - Conference contribution
SN - 9781467355773
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
SP - 649
EP - 653
BT - 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013
Y2 - 16 June 2013 through 19 June 2013
ER -