Orthogonal time frequency space modulation system
First Claim
1. A method for waveform transmission, the method comprising:
- receiving a plurality of information symbols;
creating a matrix of modulation parameters by using each of the plurality information symbols to modulate one of a plurality of two-dimensional basis functions on a time-frequency plane wherein each of the plurality of two-dimensional basis functions is uniquely associated with one of the plurality of information symbols;
generating a transmit waveform comprised of a plurality of pulse waveforms, each of the plurality of pulse waveforms corresponding to a combination of one of the modulation parameters and one of a plurality of time-translated and frequency-modulated versions of a fundamental transmit pulse; and
transmitting the transmit waveform over a communication channel.
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Accused Products
Abstract
A system and method for orthogonal time frequency space communication and waveform generation. The method includes receiving a plurality of information symbols and creating a plurality of modulation symbols by using each of the plurality information symbols to modulate one of a plurality of two-dimensional basis functions on a time-frequency plane Each of the plurality of two-dimensional basis functions is uniquely associated with one of the plurality of information symbols. The method further includes generating a transmit waveform comprised of a plurality of pulse waveforms. Each of the plurality of pulse waveforms corresponds to a combination of one of the plurality of modulation symbols and one of a plurality of time-translated and frequency-modulated versions of a fundamental transmit pulse.
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Citations
21 Claims
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1. A method for waveform transmission, the method comprising:
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receiving a plurality of information symbols; creating a matrix of modulation parameters by using each of the plurality information symbols to modulate one of a plurality of two-dimensional basis functions on a time-frequency plane wherein each of the plurality of two-dimensional basis functions is uniquely associated with one of the plurality of information symbols; generating a transmit waveform comprised of a plurality of pulse waveforms, each of the plurality of pulse waveforms corresponding to a combination of one of the modulation parameters and one of a plurality of time-translated and frequency-modulated versions of a fundamental transmit pulse; and transmitting the transmit waveform over a communication channel. - View Dependent Claims (2, 3, 4, 5, 6, 21)
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7. A communication device, comprising:
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a wireless transmitter; a processor; and a memory including program code executable by the processor, the program code including; code for causing the processor to receive a plurality of information symbols; code for causing the processor to create a matrix of modulation parameters by using each of the plurality information symbols to modulate one of a plurality of two-dimensional basis functions on a time-frequency plane wherein each of the plurality of two-dimensional basis functions is uniquely associated with one of the plurality of information symbols; code for causing the processor to generate a transmit waveform comprised of a plurality of pulse waveforms, each of the plurality of pulse waveforms corresponding to a combination of one of the modulation parameters and one of a plurality of time-translated and frequency-modulated versions of a fundamental transmit pulse; and code for causing the processor to provide the transmit waveform to the wireless transmitter for transmission by the wireless transmitter. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method, comprising:
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receiving, at a communication receiver, one or more modulated waveforms; matched filtering samples of the one or more modulated waveforms with respect to a receive pulse to produce estimated time-frequency modulation symbols wherein each of the estimated time-frequency modulation symbols corresponds to modulation of one of a plurality of orthogonal two-dimensional basis functions by one of a plurality of information symbols; and projecting the estimates of the time-frequency modulation symbols on the plurality of orthogonal two-dimensional basis functions in order to obtain estimates of the plurality of information. - View Dependent Claims (14, 15, 19)
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16. A communication device, comprising:
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a wireless receiver configured to receive one or more modulated waveforms; a processor; and a memory including program code executable by the processor, the program code including; code for causing the processor to receive, from the wireless receiver, samples of one or more modulated waveforms, code for causing the processor to matched filter samples of the one or more modulated waveforms with respect to a receive pulse to produce estimated time-frequency modulation symbols wherein each of the estimated time-frequency modulation symbols corresponds to modulation of one of a plurality of orthogonal two-dimensional basis functions by one of a plurality of information symbols; and code for causing the processor to project the estimated time-frequency modulation symbols on the plurality of orthogonal two-dimensional basis functions in order to obtain estimates of the plurality of information symbols. - View Dependent Claims (17, 18, 20)
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Specification