# US 2014/0154995 A1 · Adaptive rf system testing system and method

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- Number: US 2014/0154995 A1
- Document ID: US20140154995A1
- Status: Published application
- Kind: A1
- Application number: 13/691,154
- Filed: 2012-11-30
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Echo Ridge LLC
- Applicants: Echo Ridge LLC
- Inventors: Joseph P. Kennedy; John P. Carlson
- Web page: https://patentgrep.com/patent/US20140154995A1

## CPC

- H04B 17/14: of the whole transmission and reception path, e.g. self-test loop-back
- H04B 17/3912: {Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region}
- H04W 24/06: Testing, {supervising or monitoring} using simulated traffic
- H04B 17/101: {for measurement of specific parameters of the transmitter or components thereof}
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A system and method for testing an adaptive RF system in an emulated RF environment using a feedback control module to efficiently and accurately evaluate the performance of the RF system under test in the search space.

## Claims

### Claim 1

A method of testing of an RF system in a emulated RF environment comprising the steps of:
(a) identifying at least two parameters to evaluate for an RF system, wherein a first parameter is an independent variable and a second parameter is a dependent variable;
(b) testing the RF system by evaluating the at least two parameters across a first search space in a simulated RF environment;
(c) determining a gradient between the first and second parameters across the first search space;
(d) dividing the search space into a plurality of subspaces as a function of the determined gradient;
(e) eliminating a subspace from further testing if the determined gradient for the subspace is less than a predetermined threshold;
(f) testing the identified at least two parameters in the remaining subspaces that have not been eliminated;
(g) continuing testing the identified at least two parameters in the remaining subspaces until a completion criteria is met.

### Claim 2 (depends on 1)

The method of claim 1 wherein the RF system is at least one of a transmitter, a receiver, a communication network a navigation device a system or a radar system.

### Claim 3 (depends on 1)

The method of claim 1 wherein the gradient predetermined threshold is determined as a function of a priori knowledge of the first and second parameter relationship,

### Claim 4 (depends on 1)

The method of claim 1 wherein the completion criteria is a costing function.

### Claim 5 (depends on 1)

The method of claim 1 wherein the completion criteria is a confidence level.

### Claim 6 (depends on 1)

The method of claim 1 wherein the first or second parameter includes a noise component.

### Claim 7 (depends on 1)

The method of claim 1 wherein the first parameter is a signal to noise ratio and the second parameter is timing accuracy.

### Claim 8 (depends on 1)

The method of claim 1 wherein three parameters are identified and wherein step (c) determines a gradient between the three parameters across the first search space.

### Claim 9 (depends on 1)

The method of claim 1 wherein the RF environment is emulated in software and capable of being changed while the at least two parameters are tested.

### Claim 10 (depends on 1)

The method of claim 1 wherein the RF system includes a memory containing previous test information including values for at least one of the parameters in the tested RF environment

### Claim 11

A system for testing of an RF system in a emulated RF environment, comprising:
a memory for storing computer readable code;
an RF environment module operatively coupled to the memory, the module configured to emulate an RF environment in response to control instructions from a feedback control module;
an RF system under test operatively coupled to the memory;
a test module operatively coupled to the memory, the module configured to test the RF system by evaluating at least two parameters across a first search space in an emulated RF environment, wherein a first parameter is an independent variable and a second parameter is a dependent variable;
a feedback control module operatively coupled to the memory, the module configured to:
determine a gradient between the first and second parameters across the first search space;
divide the search space into a plurality of subspaces as a function of the determined gradient;
eliminate a subspace from further testing if the determined gradient for the subspace is less than a predetermined threshold;
determine if a completion criteria has been met, and if the completion criteria has not been met, control the RF environment module to provide the remaining subspaces for further testing.

### Claim 12 (depends on 11)

The system of claim 11 wherein the at least two parameters is selected from the set of RF environment parameters configurable in the RF environment module and RF system under test parameters observable in the RF system under test.

### Claim 13 (depends on 11)

The system of claim 11 wherein the completion criteria is a function of a confidence level.

### Claim 14 (depends on 11)

The system of claim 11 wherein the completion criteria is a costing function.

### Claim 15 (depends on 11)

The system of claim 11 wherein the RF environment module emulates the propagation characteristics for a given terrain and morphology.

### Claim 16 (depends on 11)

The system of claim 11, wherein the RF system under tested is implemented in software configured to emulate an actual RF system.