Methods of operating and implementing wireless OTFS communciations systems

摘要

Computerized wireless transmitter/receiver system that automatically uses combinations of various methods, including transmitting data symbols by weighing or modulating a family of time shifted and frequency shifted waveforms bursts, pilot symbol methods, error detection methods, MIMO methods, and other methods, to automatically determine the structure of a data channel, and automatically compensate for signal distortions caused by various structural aspects of the data channel, as well as changes in channel structure. Often the data channel is a two or three dimensional space in which various wireless transmitters, receivers and signal reflectors are moving. The invention's modulation methods detect locations and speeds of various reflectors and other channel impairments. Error detection schemes, variation of modulation methods, and MIMO techniques further detect and compensate for impairments. The invention can automatically optimize its operational parameters, and produce a deterministic non-fading signal in environments in which other methods would likely degrade.

主权项

1. An automated method of wirelessly transmitting a plurality of symbols through a multi-dimensional data channel connecting at least one wireless transmitter and at least one wireless receiver;
said multi-dimensional data channel comprising at least two dimensions of space and one dimension of time; said multi-dimensional data channel further comprising at least one wireless reflector, each said at least one wireless reflector comprising a reflector location, velocity, and at least one coefficient of wireless reflection; each said at least one wireless transmitter comprising a wireless transmitter location and velocity; each said at least one wireless receiver comprising a wireless receiver location and velocity; said method comprising: at least for said symbols that comprise data symbols, and where there are a plurality of such data symbols, using at least one processor to spread each data symbol throughout said plurality of data symbols in a lossless and invertible manner, thereby creating a plurality of OTFS symbols, and using said at least one transmitter and at least one processor to wirelessly transmit at least said data symbols as a plurality of OTFS symbols where each data symbol in said plurality of OTFS symbols is spread throughout a plurality of mutually orthogonal time shifted and frequency shifted wireless OTFS waveform bursts, thereby producing originally transmitted wireless OTFS waveform bursts; wherein upon propagation through said multi-dimensional data channel, said originally transmitted wireless OTFS waveform bursts travel over at least one path, said at least one path, comprising at least one of: a: originally transmitted wireless OTFS waveform bursts traveling directly from said at least one wireless transmitter to said at least one wireless receiver as direct wireless OTFS waveform bursts; and/or b: originally transmitted OTFS waveform bursts reflecting off of said at least one wireless reflector before reaching said at least one wireless receiver, thereby producing time delayed and Doppler frequency shifted reflected wireless OTFS waveform bursts at said at least one wireless receiver; wherein at said at least one wireless receiver, the resulting combination of any said direct wireless OTFS waveform bursts and any said reflected wireless OTFS waveform bursts produces channel convoluted OTFS waveform bursts; at said at least one wireless receiver, receiving said channel convoluted OTFS waveform bursts; using at least one processor to determine channel response parameters of said multi-dimensional data channel between said at least one wireless transmitter and said at least one wireless receiver, wherein said channel response parameters of said multi-dimensional data channel are created by at least relative positions, relative velocities, and properties of said at least one wireless transmitter, said at least one wireless receiver, and said at least one wireless reflector; using said channel response parameters and at least one processor to deconvolute received channel convoluted OTFS waveform bursts, thereby deriving at least an approximation of said originally transmitted OTFS waveform bursts; using at least one processor to mathematically extract said plurality of data symbols from said approximation of said originally transmitted OTFS waveform bursts; thereby transmitting at least some of said data symbols between said at least one wireless transmitter and at least one wireless receiver.