Methods of operating and implementing wireless communications systems

• US 10,667,148 B1
• Filed: 07/21/2018
• Issued: 05/26/2020
• Est. Priority Date: 05/28/2010
• Status: Active Grant

• Current Assignee: Cohere Technologies Inc
• Original Assignee: Cohere Technologies Inc
• Inventors: Rakib, Shlomo Selim, Hadani, Ronny
• Primary Examiner(s): Elliott, IV, Benjamin H
• Application Number:
  US16/041,781
• Time in Patent Office: 675 Days
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 25/022 of frequency response
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2639 Modulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms
• CPC Class Codes: H04L 27/26532 Demodulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

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.

Claims

1. A system comprising:

at least one software configured wireless transmitter configured to wirelessly transmit a plurality of symbols to at least one software configured wireless receiver through a multi-dimensional data channel connecting said at least one wireless transmitter to said 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 further comprising a wireless transmitter location and velocity, and at least one transmitter processor;

each said at least one wireless receiver further comprising a wireless receiver location and velocity, and at least one receiver processor;

said at least one transmitter processor configured to transmit,

at least for said symbols that comprise data symbols, and where there are a plurality of such data symbols, said data symbols as originally transmitted wireless waveform bursts;

wherein upon propagation through said multi-dimensional data channel, said originally transmitted wireless waveform bursts travel over at least one path, said at least one path, comprising at least one of;

a;

originally transmitted wireless waveform bursts traveling directly from said at least one wireless transmitter to said at least one wireless receiver as direct wireless waveform bursts; and

/or

b;

originally transmitted 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 waveform bursts at said at least one wireless receiver;

wherein at said at least one wireless receiver, a resulting combination of any said direct wireless waveform bursts and any said reflected wireless waveform bursts produces channel convoluted waveform bursts;

said at least one wireless receiver configured to receive said channel convoluted waveform bursts by using said at least one receiver 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;

said at least one receiver processor further configured to use said channel response parameters to deconvolute received channel convoluted waveform bursts, thereby deriving at least an approximation of said originally transmitted waveform bursts;

said at least one receiver processor further configured to extract said plurality of data symbols from said approximation of said originally transmitted waveform bursts, thereby receiving at least some of said data symbols transmitted between said at least one wireless transmitter and at least one wireless receiver.

2. The system of claim 1, wherein said at least one transmitter is further configured to use said at least one transmitter processor to transmit at least one pilot symbol as at least one wireless pilot symbol waveform burst at at-least one defined time and frequency;

wherein the direct and reflected versions of said at least one wireless pilot symbol waveform burst reach said at least one wireless receiver as at least one channel convoluted pilot symbol waveform burst;

said at least one wireless receiver further configured to receive said at least one channel convoluted pilot symbol waveform burst, and use said at least one receiver processor to determine the channel response parameters of said multi-dimensional data channel connecting said at least one wireless transmitter and at least one wireless receiver, and to subsequently use said channel response parameters to further deconvolute the received channel convoluted waveform bursts.

3. The system of claim 1, wherein at least some of said symbols comprise error detection or error correction symbols;

said at least one receiver processor further configured to use said error detection or error correction symbols to detect when symbol transmission errors exceed a predetermined acceptable error level, and to automatically inform said receiver or said transmitter that said channel response parameters are suboptimum, and to initiate corrective action; and

/or

said at least one receiver processor further configured to use said error detection or error correction symbols to automatically correct errors in other data symbols.

4. The system of claim 1, wherein at least one of said wireless transmitter and said wireless receiver further comprise multiple antennas, said multiple antennas positioned at different locations on or near said at least one wireless transmitter and said wireless receiver, and said multiple antennas sharing the same velocity of their respective wireless transmitter or wireless receiver;

at least one of said wireless transmitter and said wireless configured further configured to use said multiple antennas to perform at least one of further determining said channel response parameters and shaping at least a spatial distribution of said transmitted or received wireless waveform bursts.

5. The system of claim 1, wherein at least one of said wireless transmitter and said wireless receiver further comprise multiple antennas, said multiple antennas positioned at different locations on or near said at least one wireless transmitter and said wireless receiver, and said multiple antennas sharing the same velocity of their respective wireless transmitter or wireless receiver;

wherein said multiple antennas are divided into at least a first subset of antennas and a second subset of antennas;

and said first subset of said multiple antennas is configured to transmit or receive a first set of wireless waveform bursts that differs from a second set of wireless waveform bursts transmitted or received by said second subset of antennas.

6. The system of claim 1, wherein at least one of said wireless transmitter and said wireless receiver are configured in a first full duplex device, and wherein at least one of said wireless transmitter and said wireless receiver are configured in a second full duplex device;

at least said first full duplex device further configured to control coupling between said first full duplex device'"'"'s at least one wireless transmitter and said first full duplex device'"'"'s at least one wireless receiver so as to mitigate interference between said first full duplex device'"'"'s at least one wireless transmitter and said first full duplex device'"'"'s at least one wireless receiver while transmitting to said second full duplex device, said first full duplex device also configured to simultaneously also optimize a sensitivity of said first full duplex device'"'"'s at least one wireless receiver while receiving from said second full duplex device'"'"'s at least one wireless transmitter;

wherein said first full duplex device is also configured to control said controlling coupling by also configuring said first full duplex device to obtain self-channel response parameters of waveform bursts or pilot symbol waveform bursts traveling between said first full duplex device'"'"'s at least one wireless transmitter and said first full duplex device'"'"'s at least one wireless receiver; and

said first full duplex device'"'"'s at least one processor and said self-channel response parameters are further configured to digitally mitigate said interference.

7. The system of claim 1, wherein said at least one transmitter is configured to transmit polarized originally transmitted waveform bursts or pilot symbol waveform bursts according to at least one direction of polarization;

said at least one wireless reflector is a polarization altering wireless reflector that alters the polarization of said time delayed and Doppler frequency shifted reflected wireless waveform bursts or pilot symbol waveform bursts according to a first reflector polarization operator;

said at least one receiver is further configured to detect at least one direction of polarization in said received convoluted waveform bursts or pilot symbol waveform bursts;

wherein when said originally transmitted waveform bursts or pilot symbol waveform bursts reflect off of said at least one wireless reflector, at least some of said originally transmitted waveform bursts or pilot symbol waveform bursts are also polarization shifted according to said first reflector polarization operator;

said at least one receiver further configured to use said at least one direction of polarization in said received channel convoluted waveform bursts or pilot symbol waveform bursts to further determine the channel response parameters of said multi-dimensional data channel.

8. The system of claim 1, wherein said system further comprises a map database of the channel response parameters of said multi-dimensional data channel at a plurality of transmitter and receiver locations;

said at least one wireless transmitter and said at least one wireless receiver configured to determine their respective positions, said at least one wireless transmitter and said at least one wireless receiver further configured to use said positions of said at least one wireless transmitter and said at least one wireless receiver to search said map database and retrieve at least some channel response parameters of said multi-dimensional data channel at said positions of said at least one wireless transmitter and/or said at least one wireless receiver.

9. A system comprising at least one wireless transmitter device, each said at least one wireless transmitter device having a wireless transmitter device location and velocity, each said at least one wireless transmitter device configured to automatically wirelessly transmit a plurality of symbols through a multi-dimensional data channel to at least one wireless receiver device with a wireless receiver device location and velocity;

said multi-dimensional data channel comprising at least two dimensions of space and one dimension of time;

wherein said at least some of said plurality of symbols comprise a plurality of data symbols;

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;

wherein channel response parameters of said multi-dimensional data channel are determined by at least relative positions, relative velocities, and said coefficients of wireless reflection of each said at least one wireless transmitter device, said at least one wireless receiver device, and said at least one wireless reflector;

each said at least one transmitter device comprising;

at least one processor, memory, at least one processor-controlled wireless transmitter component configured to transmit wireless signals at a plurality of frequencies, and at least one antenna; and

said at least one transmitter device further configured to use said at least one antenna to wirelessly transmit said symbols as wireless waveform bursts, thereby producing originally transmitted wireless waveform bursts.

10. The system of claim 9, wherein said at least one wireless transmitter device is configured to at least initially determine said channel response by retrieving said channel response parameters from memory;

and

wherein said at least one wireless transmitter device is further configured to determine subsequent channel response parameters based at least partially upon feedback obtained from a wireless receiver that has received said transmitted symbols.

11. A system comprising at least one wireless receiver device, each said at least one wireless receiver device comprising a wireless receiver device location and velocity, each said at least one wireless receiver device configured to automatically wirelessly receive a plurality of symbols transmitted through a multi-dimensional data channel by least one wireless transmitter device with a wireless transmitter device location and velocity;

wherein at least some of said plurality of symbols comprise a plurality of data symbols, previously transmitted as a plurality originally transmitted wireless waveform bursts;

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;

wherein upon propagation through said multi-dimensional data channel, said originally transmitted wireless waveform bursts travel over at least one path, said at least one path, comprising at least one of;

a;

originally transmitted wireless waveform bursts traveling directly from said at least one wireless transmitter to said at least one wireless receiver device as direct wireless waveform bursts; and

/or

b;

originally transmitted waveform bursts reflecting off of said at least one wireless reflector before reaching said at least one wireless receiver device, thereby producing time delayed and Doppler frequency shifted reflected wireless waveform bursts at said at least one wireless receiver device;

wherein at said at least one wireless receiver device, a resulting combination of any said direct wireless waveforms bursts and any said reflected wireless waveform bursts produces channel convoluted waveform bursts;

wherein channel response parameters of said multi-dimensional data channel are determined by at least relative positions, relative velocities, and properties of said at least one wireless transmitter device, said wireless receiver device, and said at least one wireless reflector;

said wireless receiver device comprising;

at least one processor-controlled wireless receiver component configured to receive wireless signals at a plurality of frequencies, at least one processor, memory, and at least one antenna;

said at least one processor configured to use said at least one wireless receiver component, at least one antenna, and memory to receive said convoluted waveform bursts or pilot symbol waveform bursts, and determine channel response parameters;

said at least one processor further configured to use said channel response parameters and said memory to deconvolute received channel convoluted waveform bursts, thereby deriving at least an approximation of said originally transmitted waveform bursts;

said at least one processor further configured to use said memory to extract said plurality of data symbols from said approximation of said originally transmitted waveform bursts, thereby receiving said plurality of data symbols.

12. The system of claim 11, wherein said wireless receiver device is further configured to retrieve previously stored channel response parameters from memory, and to use said previously stored channel response parameters to at least initially determine said channel response parameters;

and

wherein said wireless receiver device is further configured to transmit feedback pertaining to said channel response parameters to a transmitter that has transmitted said plurality of symbols.