Systems and methods for communicating by modulating data on zeros in the presence of channel impairments

US10804982B2 · kind B2 · utility

Assignees

• CALIFORNIA INSTITUTE OF TECHNOLOGY · US
• The Regents of the University of California · US
• TECHNISCHE UNIVERSITÄT BERLIN · DE

Inventors

• Philipp Walk · Chicago, US
• Babak Hassibi · San Marino, US
• Peter Jung · Munich, DE
• Hamid Jafarkhani · Irvine, US

Key dates

• Filing date: Feb 7, 2020
• Grant date: Oct 13, 2020
• Expiry date: Feb 7, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L27/2662
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Communication systems and methods in accordance with various embodiments of the invention utilize modulation on zeros. Carrier frequency offsets (CFO) can result in an unknown rotation of all zeros of a received signal's z-transform. Therefore, a binary MOCZ scheme (BMOCZ) can be utilized in which the modulated binary data is encoded using a cycling register code (e.g. CPC or ACPC), enabling receivers to determine cyclic shifts in the BMOCZ symbol resulting from a CFO. Receivers in accordance with several embodiments of the invention include decoders capable of decoding information bits from received discrete-time baseband signals by: estimating a timing offset for the received signal; determining a plurality of zeros of a z-transform of the received symbol; identifying zeros from the plurality of zeros that encode received bits by correcting fractional rotations resulting from the CFO; and decoding information bits based upon the received bits using a cycling register code.