Zobrazit v EDS

Systems and Methods for Communicating by Modulating Data on Zeros in the Presence of Channel Impairments

Uloženo v:
Podrobná bibliografie
Název: Systems and Methods for Communicating by Modulating Data on Zeros in the Presence of Channel Impairments
Document Number: 20240314006
Datum vydání: September 19, 2024
Appl. No: 18/491558
Application Filed: October 20, 2023
Abstrakt: 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.
Assignees: California Institute of Technology (Pasadena, CA, US), The Regents of the University of California (Oakland, CA, US), Technische Universität Berlin (Berlin, DE)
Claim: 1-20. (canceled)
Claim: 21. A method for establishing channel estimation for duplex data communications using a MOZ (Modulation of Zeros) modulation scheme and then transitioning to another modulation scheme, the method comprising: exchanging a first data communication between a transmitter and a receiver using a first modulation scheme, where the first modulation scheme is a MOZ scheme in which a plurality of encoded bits are encoded in the zeroes of the z-transform of the discrete-time baseband signal used to generate a first continuous-time signal, and where the first continuous-time signal forms a portion of the first data communication that is transmitted from the transmitter to the receiver; ceasing use of the first modulation scheme between the transmitter and receiver after the first data communication; commencing, after exchanging the first data communication, communication between the transmitter and the receiver using a second modulation scheme, where the second modulation scheme is different from the first modulation scheme.
Current International Class: 04; 04; 04; 04; 04
Přístupové číslo: edspap.20240314006
Databáze: USPTO Patent Applications
Popis
Abstrakt: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.