Multiple access in an orthogonal time frequency space communication system
First Claim
Patent Images
1. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
- transforming, at a user equipment (UE), input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data wherein the OTFS transformed data is included within a data frame structured for use within the LTE communication system and wherein the data frame comprises an uplink frame; and
transmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter.
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Abstract
A method and apparatus for wireless communication compatible with a Long Term Evolution (LTE) communication system. The method includes transforming input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data. The method includes generating a data frame that contains the transformed data and is structured for use within the LTE communication system. The method further includes transmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter.
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Citations
18 Claims
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1. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
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transforming, at a user equipment (UE), input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data wherein the OTFS transformed data is included within a data frame structured for use within the LTE communication system and wherein the data frame comprises an uplink frame; and transmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter. - View Dependent Claims (2, 3, 4, 5)
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6. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
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transforming input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data wherein the OTFS transformed data is included within a data frame structured for use within the LTE communication system and wherein the input data includes a plurality of information symbols, the transforming including encoding an N×
M array containing the plurality of information symbols into a two-dimensional array containing the OTFS transformed data by spreading each of the plurality of information symbols with respect to both time and frequency;wherein the encoding includes; transforming the N×
M array into an array of filtered OFDM symbols using at least one Fourier transform and a filtering process;transforming the array of filtered OFDM symbols into an array of OTFS symbols using at least one two-dimensional Fourier transform wherein the array of OTFS symbols corresponds to the OTFS transformed data; and transmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter.
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7. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
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transforming input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data wherein the OTFS transformed data is included within a data frame structured for use within the LTE communication system and wherein the input data includes a plurality of information symbols, the transforming including encoding an N×
M array containing the plurality of information symbols into a two-dimensional array containing the OTFS transformed data by spreading each of the plurality of information symbols with respect to both time and frequency, wherein the encoding includes combining an inverse symplectic transform with a windowing operation; andtransmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter.
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8. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
transforming input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data wherein the OTFS transformed data is included within a data frame structured for use within the LTE communication system and wherein the input data includes a plurality of information symbols, the transforming including encoding an N×
M array containing the plurality of information symbols into a two-dimensional array containing the OTFS transformed data by spreading each of the plurality of information symbols with respect to both time and frequency, wherein the encoding is performed in accordance with the following relationship;
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9. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
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transforming input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data wherein the OTFS transformed data is included within a data frame structured for use within the LTE communication system wherein the data frame comprises a downlink frame and the transforming occurs at a network node in communication with a user equipment (UE); and transmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter.
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10. A communication apparatus compatible with a Long Term Evolution (LTE) communication system, the apparatus comprising:
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an antenna; a transmitter operatively coupled to the antenna, the transmitter including; an Orthogonal Time Frequency Space (OTFS) pre-processing module configured to transform input data in accordance with a two-dimensional transform and thereby produce OTFS transformed data, an Orthogonal Frequency Division Multiplexing (OFDM) modulator, the OFDM modulator including an input for receiving a data frame including the OTFS transformed data, the data frame being structured for use within the LTE communication system; and a receiver operatively coupled to the antenna, the receiver including; an OFDM demodulator, an OTFS post-processing module configured to perform an inverse of the two-dimensional transform. - View Dependent Claims (11, 12)
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13. A method for wireless communication compatible with a Long Term Evolution (LTE) communication system, the method comprising:
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receiving, using a receiver including an Orthogonal Frequency Division Multiplexing (OFDM) demodulator and an Orthogonal Time Frequency Space (OTFS) post-processing module, a plurality of signal components of a modulated signal; generating, by demodulating the plurality of signal components using the OFDM demodulator, a plane of estimated time-frequency modulation symbols; and performing, using the OTFS post-processing module, an inverse of a two dimensional time-frequency transformation with respect to ones of the estimated time-frequency modulation symbols in order to provide estimated data corresponding to an LTE data frame. - View Dependent Claims (14, 15)
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16. A receiver apparatus compatible with an LTE communication system, the apparatus comprising:
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a receiver front end, the receiver front end being configured to receive a plurality of signal components of an LTE signal; an Orthogonal Frequency Division Multiplexing (OFDM) demodulator configured to generate a plane of estimated time-frequency modulation symbols based upon the plurality of signal components; and an Orthogonal Time Frequency Space (OTFS) post-processing unit operative to provide an estimated OTFS data frame, the OTFS post-processing unit being configured to perform an inverse of a two dimensional time-frequency transformation with respect to ones of the estimated time-frequency modulation symbols. - View Dependent Claims (17, 18)
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Specification