Angle-Domain Frequency-Selective Sparse Channel Estimation for Underwater MIMO-OFDM Systems
- Authors
- Kim, Sunwoo
- Issue Date
- May-2012
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- MIMO; OFDM; angle-domain; underwater acoustic communication; sparse channel estimation; orthogonal matching pursuits
- Citation
- IEEE COMMUNICATIONS LETTERS, v.16, no.5, pp.685 - 687
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE COMMUNICATIONS LETTERS
- Volume
- 16
- Number
- 5
- Start Page
- 685
- End Page
- 687
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/165707
- DOI
- 10.1109/LCOMM.2012.032612.120250
- ISSN
- 1089-7798
- Abstract
- In this letter we propose a fully angle-domain frequency-selective sparse channel estimation algorithm for multiple-input multiple-output orthogonal frequency division multiplexing underwater acoustic communication (MIMO-OFDM UAC) systems. The algorithm is divided into two stages (finding nonzero tap positions and finding nonzero angle-domain coefficients) to reduce the computational complexity. It has been demonstrated that the 2-stage orthogonal matching pursuits algorithm provides an efficient way to estimate the under-determined frequency-selective sparse channel with reduced complexity for MIMO-OFDM UAC systems.
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