Modulation and equalization in an orthonormal time-frequency shifting communications system
AssigneeCohere Technologies, Inc.
InventorsRonny Hadani, Shlomo Selim Rakib
Life of this patent
Estimating the term…
Abstract
A method for modulating data for transmission within a communication system. The method includes establishing a time-frequency shifting matrix of dimension N×N, wherein N is greater than one. The method further includes combining the time-frequency shifting matrix with a data frame to provide an intermediate data frame. A transformed data matrix is provided by permuting elements of the intermediate data frame. A modulated signal is generated in accordance with elements of the transformed data matrix.
Claims20
A method for wireless communication, comprising:
- transforming a data frame with N2 data symbols into a time frequency shifted (TFS) data matrix with N2 elements, wherein each of the N2 elements carries information corresponding to all N2 data symbols;
- generating, based on a feedback signal, a pre-equalized TFS data matrix by performing a pre-equalization operation on the TFS data matrix;
- generating N composite waveforms based on modulating each column of the pre-equalized TFS data matrix;
- and
- transmitting each of the N composite waveforms as a pre-equalized orthonormal time frequency space (OTFS) signal.
A method for wireless communication, comprising:
- receiving each of N orthonormal time frequency space (OTFS) signals;
- constructing, based on the N OTFS signals, a received data matrix;
- generating an equalized data matrix with N2 elements by performing an equalization operation on the received data matrix;
- and
- transforming the equalized data matrix into a data frame with N2 data symbols, wherein each of the N2 elements carries information corresponding to all N2 data symbols.
A device for wireless communication, comprising:
- a processor;
- and
- a memory that comprises instructions stored thereupon, wherein the instructions when executed by the processor configure the processor to:
- transform a data frame with N2 data symbols into a time frequency shifted (TFS) data matrix with N2 elements, wherein each of the N2 elements carries information corresponding to all N2 data symbols;
- generate, based on a feedback signal, a pre-equalized TFS data matrix by performing a pre-equalization operation on the TFS data matrix;
- generate N composite waveforms based on modulating each column of the pre-equalized TFS data matrix;
- and
- transmit each of the N composite waveforms as a pre-equalized orthonormal time frequency space (OTFS) signal.
Dependencies are inferred from the claim text.