# US 2023/0069488 A1 · Technique for post-correlation beamforming

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2023/0069488 A1
- Document ID: US20230069488A1
- Status: Published application
- Kind: A1
- Application number: 17/461,568
- Filed: 2021-08-30
- Published: 2023-03-02
- Earliest claimed: 2021-08-30
- Assignees: Rockwell Collins, Inc.
- Applicants: Rockwell Collins, Inc.
- Inventors: Carlos J. Chavez; Sasha Oster
- Web page: https://patentgrep.com/patent/US20230069488A1

## CPC

- H04B 7/043: {using best eigenmode, e.g. beam forming or beam steering}
- H04B 7/086: {using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming}
- H04B 7/0408: using two or more beams, i.e. beam diversity
- H04B 7/0854: {using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion}
- H04B: TRANSMISSION

## Abstract

A receiver system for correlating one or more signals (beam patterns) is disclosed. One or more antenna elements are configured to receive the signals. A controller generates correlator outputs based on a first set of duplicated signals, generates a first set of beams based on the one or more correlator outputs using a first beamforming module, generates a second set of beams based on a second set of duplicated signals using a second beamforming module, generates one or more power estimates based on the second set of beams, and divides each of the first set of beams by a corresponding power estimate to generate one or more normalized correlations.

## Claims

### Claim 1

A receiver system for correlating one or more signals comprising:
one or more antenna elements configured to receive the one or more signals;
a controller including one or more processors configured to execute program instructions causing the one or more processors to:
duplicate the one or more signals into a first set of duplicated signals and a second set of duplicated signals;
generate one or more correlator outputs based on the first set of duplicated signals using one or more correlators, and generate a first set of beams based on the one or more correlator outputs using a first beamforming module;
generate a second set of beams based on the second set of duplicated signals using a second beamforming module, and generate one or more power estimates based on the second set of beams using one or more power estimators,
wherein each of the first set of beams corresponds to a respective one of the one or more power estimates; and
divide each of the first set of beams by the corresponding one of the one power estimates using one or more dividers to generate one or more normalized correlations,
wherein the one or more antenna elements comprises L antenna elements, wherein L is an integer greater than or equal to one, wherein L is less than M,
wherein the normalized correlations enter a thresholding module configured to compare each of the normalized correlations to a correlation threshold.

### Claim 2

(canceled)

### Claim 3 (depends on 1)

The receiver system of claim 1, wherein the one or more correlators, the first beamforming module, the second beamforming module, the one or more power estimators, and the one or more dividers are implemented using digital electronics.

### Claim 4 (depends on 1)

The receiver system of claim 1, wherein the one or more correlators, the first beamforming module, the second beamforming module, the one or more power estimators, and the one or more dividers are implemented using analog electronics.

### Claim 5 (depends on 1)

The receiver system of claim 1, wherein each of the one or more antenna elements comprises a sub-array of antenna elements.

### Claim 6 (depends on 1)

The receiver system of claim 1, wherein each of the one or more signals corresponds to a respective one of M beam patterns, wherein M is an integer greater than or equal to one.

### Claim 7 (depends on 6)

The receiver system of claim 6, wherein each of the M beam patterns has a nominal pointing direction and null pattern that differs from others of the M beam patterns.

### Claim at position 8

8-9. (canceled)

### Claim 10 (depends on 1)

The receiver system of claim 1, wherein the normalized correlations above the correlation threshold are identified as desirable signals.

### Claim 11 (depends on 1)

The receiver system of claim 1, wherein the normalized correlations below the correlation threshold are identified as undesirable signals.

### Claim 12 (depends on 1)

The receiver system of claim 1, wherein generating the one or more correlator outputs comprises matching a known sequence of symbols.

### Claim 13 (depends on 12)

The receiver system of claim 12, wherein the known sequence of symbols is pseudo-randomly generated.

### Claim 14

(canceled)