Modulation and equalization in an orthonormal time-frequency shifting communications system
First Claim
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1. 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.
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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.
182 Citations
20 Claims
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1. A method for wireless communication, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for wireless communication, comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A device for wireless communication, comprising:
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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. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification