Invention Grant
- Patent Title: Systems and methods for communicating by modulating data on zeros in the presence of channel impairments
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Application No.: US17013525Application Date: 2020-09-04
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Publication No.: US10992353B2Publication Date: 2021-04-27
- Inventor: Philipp Walk , Babak Hassibi , Peter Jung , Hamid Jafarkhani
- Applicant: California Institute of Technology , The Regents of the University of California , Technische Universität Berlin
- Applicant Address: US CA Pasadena; US CA Oakland; DE Berlin
- Assignee: California Institute of Technology,The Regents of the University of California,Technische Universität Berlin
- Current Assignee: California Institute of Technology,The Regents of the University of California,Technische Universität Berlin
- Current Assignee Address: US CA Pasadena; US CA Oakland; DE Berlin
- Agency: KPPB LLP
- Main IPC: H04B7/0452
- IPC: H04B7/0452 ; H04L7/04 ; H04L27/12 ; H04B1/04

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.
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