Title:
APPARATUS AND METHOD FOR INCREASED DATA RATES IN UNDERWATER COMMUNICATIONS USING ORBITAL ANGULAR MOMENTUM
Document Type and Number:
WIPO Patent Application WO/2016/164146
Kind Code:
A3
Abstract:
A system for providing underwater communication using orbital angular momentum (OAM) includes a transmitter that processes input data to be transmitted using pre-coding information based on current transmission channel conditions to maximize data rate based on channel conditions. A receiver receives a transmitted multiplexed OAM optical signal and analyzes the received signal for channel state information. The channel state information is used to determine a set of pre-coding values that allow the transmitter to pre-code the input data to maximize the data rate based on current channel conditions. The pre-coding values are mapped to a codebook entry which identifies the pre-coding values. The codebook entry is transmitted from the receiver to the transmitter. The transmitter uses the received codebook entry to identify pre-coding values used to process subsequent input data to be transmitted in order to enhance data rate across the transmit channel.
Inventors:
LUDDY MICHAEL J (US)
WINTERS JACK H (US)
WINTERS JACK H (US)
Application Number:
PCT/US2016/022473
Publication Date:
November 10, 2016
Filing Date:
March 15, 2016
Export Citation:
Assignee:
LOCKHEED CORP (US)
International Classes:
H04J14/00; H04J11/00
Domestic Patent References:
| WO2015024595A1 | 2015-02-26 |
Foreign References:
| EP1909413B1 | 2010-12-29 | |||
| US20100317959A1 | 2010-12-16 | |||
| US20130027034A1 | 2013-01-31 | |||
| US20120263466A1 | 2012-10-18 |
Attorney, Agent or Firm:
LARSON, James A. (Schumann Mueller & Larson, P.C.,45 South 7th Street, Suite 270, Minneapolis MN, US)
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