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Improved Channel Estimation Based on Sorted GAIC for OFDM Systems in Sparse Multipath Channels
Bin SHENG Pengcheng ZHU Xiaohu YOU Lan CHEN
IEICE TRANSACTIONS on Communications
Publication Date: 2010/01/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
channel estimation, GAIC, OFDM, sparse multipath channels,
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In this letter, we propose a novel sparse channel estimation method for orthogonal frequency division multiplexing (OFDM) systems. The proposed method uses a discrete Fourier transform (DFT)-based technique for channel estimation and a sorted generalized Akaike information criterion (GAIC) to estimate the channel length and tap positions. Simulation results demonstrate that an improved channel estimation performance is obtained due to the reduction of signal space.