Systems and techniques for communication using combined orbital angular momentum and multiple-input-multiple-output processing

US10411811B2 · kind B2 · utility

Assignee

• University of Southern California · US

Inventors

• Alan E. Willner · Los Angeles, US
• Yongxiong Ren · San Jose, US
• Long Li · Los Angeles, US
• Guodong Xie · 红钢城街道, CN
• Yinwen Cao · Los Angeles, US
• Zhe Wang · Nanhu, CN
• Cong Liu · Lanzhou, CN
• Asher J. Willner · Los Angeles, US

Key dates

• Filing date: Dec 7, 2016
• Grant date: Sep 10, 2019
• Expiry date: Apr 1, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J14/05
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A system includes a transmitter with multiple transmit devices each having an OAM multiplexer that converts multiple input signals into an OAM beam. Each transmit device outputs a coaxial group of orthogonal OAM beams. The system also includes a receiver that has multiple receive devices each having an OAM demultiplexer that receives the group of OAM beams from a corresponding transmit device. The OAM demultiplexer also converts the coaxial group of mutually orthogonal OAM beams into a plurality of received signals corresponding to input signals represented by the OAM beams. The receiver also includes a MIMO processor that has an equalizer that determines a transfer function corresponding to crosstalk of each of the plurality of received signals. The MIMO processor also reduces the crosstalk of each of the plurality of received signals based on the transfer function and updates the transfer function.