TY - GEN
T1 - Blind channel estimation with periodicity for OFDM systems without cyclic prefix
AU - Fang, Shih Hao
AU - Chen, Ju Ya
AU - Lin, Jing Shiun
AU - Shieh, Ming Der
PY - 2011/12/1
Y1 - 2011/12/1
N2 - Generation of the signal and noise subspaces is a critical problem in subspace-based algorithms for orthogonal frequency division multiplexing (OFDM) systems. Some special characteristics, such as virtual carriers (VCs), real symbols, and/or cyclic prefix (CP), can be exploited to construct the required noise subspace in conventional subspace approaches. In this paper, a blind channel estimation algorithm with periodicity property is proposed for OFDM systems without CP. Using the time-domain periodicity, which can be obtained by inserting zeros at some positions of frequency-domain OFDM symbols, a method for constructing the noise subspace is developed based on the proposed signal model. Simulation results show that the proposed blind channel estimation method has better normalized mean-squared error (NMSE) performance than that of a conventional approach with VCs.
AB - Generation of the signal and noise subspaces is a critical problem in subspace-based algorithms for orthogonal frequency division multiplexing (OFDM) systems. Some special characteristics, such as virtual carriers (VCs), real symbols, and/or cyclic prefix (CP), can be exploited to construct the required noise subspace in conventional subspace approaches. In this paper, a blind channel estimation algorithm with periodicity property is proposed for OFDM systems without CP. Using the time-domain periodicity, which can be obtained by inserting zeros at some positions of frequency-domain OFDM symbols, a method for constructing the noise subspace is developed based on the proposed signal model. Simulation results show that the proposed blind channel estimation method has better normalized mean-squared error (NMSE) performance than that of a conventional approach with VCs.
UR - http://www.scopus.com/inward/record.url?scp=84863054909&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863054909&partnerID=8YFLogxK
U2 - 10.1109/TENCON.2011.6129148
DO - 10.1109/TENCON.2011.6129148
M3 - Conference contribution
AN - SCOPUS:84863054909
SN - 9781457702556
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
SP - 470
EP - 473
BT - TENCON 2011 - 2011 IEEE Region 10 Conference
T2 - 2011 IEEE Region 10 Conference: Trends and Development in Converging Technology Towards 2020, TENCON 2011
Y2 - 21 November 2011 through 24 November 2011
ER -