Modulation and equalization in an orthonormal time-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.
Claims19
A method of wireless transmission, comprising:
- applying a two-dimensional spreading to an input data;
- applying a fast Fourier transform (FFT) and a first and a second time-frequency tiling to an output of the two-dimensional spreading, wherein the two-dimensional spreading and the FFT together perform a series of data spreading operations using a spreading kernel;
- and
- outputting a waveform resulting from an output of the second time-frequency tiling over a channel.
A non-transitory computer readable medium including program instructions for execution by a processor in a signal transmitter;
- the program instructions, upon execution, causing the processor to implement a method comprising:
- applying a two-dimensional spreading to an input data;
- applying a fast Fourier transform (FFT) and a first and a second time-frequency tiling to an output of the two-dimensional spreading, wherein the two-dimensional spreading and the FFT together perform a series of data spreading operations using a spreading kernel;
- and
- outputting a waveform resulting from an output of the second time-frequency tiling over a channel.
An apparatus for wireless transmission, comprising a processor configured to ready program code from a memory and implement a method, comprising:
- applying a two-dimensional spreading to an input data;
- applying a fast Fourier transform (FFT) and a first and a second time-frequency tiling to an output of the two-dimensional spreading, wherein the two-dimensional spreading and the FFT together perform a series of data spreading operations using a spreading kernel;
- and
- outputting a waveform resulting from an output of the second time-frequency tiling over a channel.
Dependencies are inferred from the claim text.