Modulation and equalization in an orthonormal time-frequency shifting communications system
AssigneeCohere Technologies, Inc.
InventorsRonny Hadani, Salim Shlomo Rakib
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Abstract
A method of receiving data including receiving, on one or more carrier waveforms, signals representing a plurality of data elements of an original data frame wherein each of the data elements are represented by cyclically time shifted and cyclically frequency shifted versions of a known set of waveforms. The method further includes generating, based upon the signals, a received data frame and generating an equalized data frame by performing an equalization operation using elements of the received data frame, the equalization operation correcting for distortion introduced into the signals during propagation of the carrier waveforms through a channel.
Claims19
A receiver processing unit, comprising:
- a demodulator operative to receive and demodulate an orthonormal time-frequency shifting (OTFS) signal and to provide a demodulated OTFS signal;
- a cyclic deconvolution module configured to deconvolve the demodulated OTFS signal utilizing one or more equalization parameters;
- and
- an OTFS equalizer disposed to generate, based upon the demodulated OTFS signal, an equalized OTFS signal and the one or more equalization parameters.
A method, comprising:
- demodulating an orthonormal time-frequency shifting (OTFS) signal and providing a demodulated OTFS signal;
- deconvolving the demodulated OTFS signal utilizing one or more equalization parameters;
- and
- generating, based upon the demodulated OTFS signal, an equalized OTFS signal and the one or more equalization parameters.
Dependencies are inferred from the claim text.