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Title: Block pilot based channel estimation and high-accuracy signal detection for GSM-OFDM systems on high-speed railways
Authors: Gong, Bo
Gui, Lin
Luo, Sheng
Guan, Yong Liang
Liu, Zilong
Fan, Pingzhi
Keywords: Channel Estimation
Signal Detection
Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Gong, B., Gui, L., Luo, S., Guan, Y. L., Liu, Z., & Fan, P. (2018). Block pilot based channel estimation and high-accuracy signal detection for GSM-OFDM systems on high-speed railways. IEEE Transactions on Vehicular Technology, 67(12), 11525-11536. doi:10.1109/TVT.2018.2869679
Series/Report no.: IEEE Transactions on Vehicular Technology
Abstract: In this paper, generalized spatial modulation-orthogonal frequency-division multiplexing is introduced to wireless communication system on high-speed railways for the first time. There are two main challenges to be tackled. On the one hand, channel estimation is difficult as small number of subcarriers are activated; on the other hand, as both the dimensions of the channel matrix and the number of nonzero elements of the unknown signals are large, the matching based and the compressive sensing based signal detectors may not work effectively. To overcome these problems, we first propose a new channel estimation scheme, in which the block pilot pattern instead of the comb pilot pattern is used and a novel interpolation method, which takes the time variation property in different symbols into consideration is adopted. Simulation results demonstrate that in comparison to the conventional interpolation methods, our proposed method achieves better normalized mean square error performance. Then, for the signal detection, we adopt the decomposition and iteration to reduce the dimension of the matrix to be processed. Based on the decomposed structure, the maximum likelihood method is conducted in the solution space to detect the signal. Simulation results demonstrate that the proposed detector presents higher accuracy compared with the existing signal detection schemes.
ISSN: 0018-9545
DOI: 10.1109/TVT.2018.2869679
Rights: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
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