US 11,444,670 B1Granted

Method and apparatus for distributed beamforming

AssigneeGeneral Dynamics Mission Systems, Inc.

InventorsJohn Kleider, Christopher Steenhoek

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Abstract

Transmitting a data signal by generating a first symbol in response to the data signal and a first synchronization sequence and a second symbol in response to the data signal and a second synchronization sequence, applying a distributed coding matrix to the first symbol and the second symbol to generate a first transmission signal and a second transmission signal, transmitting the first transmission signal and the second transmission signal to the far field, isolating the first transmission signal by applying the first synchronization sequence to the far field, isolating the second transmission signal by applying the second synchronization sequence to the far field, applying the distributed coding matrix to the first transmission signal to extract the first symbol, applying the distributed coding matrix to the second transmission signal to extract the second symbol and estimating the data signal in response to the first symbol and the second symbol.

Claims20

Dependent claims

A method for transmitting a data signal employing a digital beamforming technique comprising:

generating, by a first transmitter, a first symbol in response to the data signal and a first synchronization sequence;
generating, by the first transmitter, a first transmission signal by applying a distributed coding matrix to the first symbol;
generating, by a second transmitter, a second symbol in response to the data signal and a second synchronization sequence;
generating, by the second transmitter, a second transmission signal by applying the distributed coding matrix to the second symbol;
receiving, by a first receiver, the first transmission signal and the second transmission signal,
isolating, by the first receiver, the first transmission signal in response to applying the distributed coding matrix to the first transmission signal;
extracting, by the first receiver, the first symbol from the first transmission signal in response to the first synchronization sequence;
receiving, by a second receiver, the first transmission signal and the second transmission signal;
isolating, by the second receiver, the first transmission signal in response to applying the distributed coding matrix to the second transmission signal;
extracting, by the second receiver, the second symbol in response to the second synchronization sequence;
and
estimating, by a processor, the data signal in response to the first symbol and the second symbol.

9 more elements

A beamforming communications system comprising:

a first transmitter configured for generating a first symbol in response to the data signal and a first training sequence and for generating a first transmission signal by applying a distributed coding matrix to the first symbol;
a second transmitter configured for generating a second symbol in response to the data signal and a second training sequence and for generating a second transmission signal by applying the distributed coding matrix to the second symbol;
a first receiver configured for receiving the first transmission signal and the second transmission signal, for isolating the first transmission signal in response to the distributed coding matrix, and for extracting the first symbol from the first transmission signal in response to applying the first training sequence to the first transmission signal;
a second receiver configured for receiving the first transmission signal and the second transmission signal, isolating the second transmission signal in response to the distributed coding matrix and extracting the second symbol in response to applying the second training sequence to the first transmission signal;
and
a processor configured for estimating the data signal in response to the first symbol and the second symbol.

3 more elements

A method of transmitting a data signal comprising:

receiving a data signal;
generating a first sample in response to the data signal and a distributed coding matrix;
generating a second sample in response to the data signal and the distributed coding matrix ;
generating a first transmission signal in response to applying a first synchronization sequence to the first sample;
generating a second transmission signal in response to applying a second synchronization sequence to the second sample;
transmitting the first transmission signal by a first transmitter;
transmitting the second transmission signal by a second transmitter;
receiving the first transmission signal and the second transmission signal;
isolating the first transmission signal in response to the first synchronization sequence;
isolating the second transmission signal in response to the second synchronization sequence;
extracting the first sample by applying the distributed coding matrix to the first transmission signal;
extracting the second sample by applying the distributed coding matrix to the second transmission signal;
and
estimating the data signal in response to the first sample and the second sample.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/451,145Filed 15 Oct 2021
Granted: 13 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04B 7/0617
Of weighted versions of same signal: for beam forming
H04B 7/024
Site diversity; Macro-diversity: co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input…
H04B 7/0639
Feedback format: using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
H04L 27/26134
Structure of the reference signals: pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain

Family

No related US applications are recorded in the indexed filing history.

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