Title:
IMPROVED TURBO RECEIVERS FOR SINGLE-INPUT SINGLE-OUTPUT UNDERWATER ACOUSTIC COMMUNICATIONS
Document Type and Number:
WIPO Patent Application WO/2019/018017
Kind Code:
A3
Abstract:
Systems and methods for underwater communication using a SISO acoustic channel. An acoustic receiver may receive a signal comprising information encoded in at least one transmitted symbol. Using a Bi-SDFE, the at least one transmitted symbol is estimated. The Bi-SDFE may include a SDFE and a time-reversed SDFE that each output bit extrinsic LLRs, which are combined into combined bit extrinsic LLRs. The estimated symbol is then mapped to the combined bit extrinsic LLRs, the result of which is de-interleaved. Iterative bit extrinsic LLRs are generated with a MAP and/or soft-decision decoder using the mapped, combined bit extrinsic LLRs as a priori LLRs for the Bi-SDFE in another iterative estimation. The iterative bit extrinsic LLRs are interleaved and transmitted for use by the Bi-SDFE in another iterative estimation. After a plurality of iterations, a hard decision of the transmitted symbol is generated with the MAP and/or soft-decision decoder.
Inventors:
ZHENG YAHONG (US)
DUAN WEIMIN (US)
XIAO CHENGSHAN (US)
DUAN WEIMIN (US)
XIAO CHENGSHAN (US)
Application Number:
PCT/US2018/026757
Publication Date:
February 28, 2019
Filing Date:
April 09, 2018
Export Citation:
Assignee:
ZHENG YAHONG ROSA (US)
DUAN WEIMIN (US)
XIAO CHENGSHAN (US)
DUAN WEIMIN (US)
XIAO CHENGSHAN (US)
International Classes:
H04B11/00; H04B13/02
Foreign References:
| US6813219B1 | 2004-11-02 | |||
| US20050018794A1 | 2005-01-27 | |||
| US8542724B1 | 2013-09-24 | |||
| US6819630B1 | 2004-11-16 | |||
| US20120027070A1 | 2012-02-02 |
Other References:
ZHENG ET AL.: "Turbo Equalization for Single-Carrier Underwater Acoustic Communications", IEEE COMMUNICATIONS MAGAZINE, vol. 53, no. 11, November 2015 (2015-11-01), pages 79 - 87, XP011589216, DOI: doi:10.1109/MCOM.2015.7321975
Attorney, Agent or Firm:
MEYER, Bryan, E. (US)
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