Block-FFT Based OMP for Compressed Channel Estimation in Underwater Acoustic Communications
Article
Article Title | Block-FFT Based OMP for Compressed Channel Estimation in Underwater Acoustic Communications |
---|---|
ERA Journal ID | 5068 |
Article Category | Article |
Authors | Yu, Fangyuan, Li, Dezhi, Guo, Qing, Wang, Zhenyong and Xiang, Wei |
Journal Title | IEEE Communications Letters |
Journal Citation | 19 (11), pp. 1937-1940 |
Number of Pages | 4 |
Year | Nov 2015 |
Place of Publication | United States |
ISSN | 1089-7798 |
1558-2558 | |
Digital Object Identifier (DOI) | https://doi.org/10.1109/LCOMM.2015.2427806 |
Web Address (URL) | https://ieeexplore.ieee.org/document/7097683 |
Abstract | Due to the sparsity in the delay-Doppler domain of the underwater acoustic (UWA) channel, compressed channel estimation (CCE) can effectively reduce the required number of pilots, which is desirable for low bit-rate underwater acoustic communications (UAC). Orthogonal matching pursuit (OMP) is a popular algorithm to implement CCE in UAC. The number of columns of the measurement matrix is excessive due to the large multipath delay and Doppler spread. The complexity of OMP proves to be an obstacle to practical underwater applications. This paper proposes a fast block-Fourier transform (FFT) based OMP algorithm by utilizing the inherent structure of the measurement matrix and the pilot pattern. The proposed algorithm is of considerably lower computational complexity. |
Keywords | Underwater acoustic communications; doubly spread channel; compressed channel estimation; block-FFT OMP |
Public Notes | There are no files associated with this item. |
Byline Affiliations | Harbin Institute of Technology, China |
University of Southern Queensland | |
Library Services |
https://research.usq.edu.au/item/w3vv3/block-fft-based-omp-for-compressed-channel-estimation-in-underwater-acoustic-communications
45
total views0
total downloads1
views this month0
downloads this month