Receiver Partial Decoding of Composite BOC Signals

Solution Overview

Problem

Existing navigation satellite receivers require complex circuitry and high energy consumption to fully decode multiplexed binary offset carrier signals, making them costly and inefficient.

Innovation Solution

A receiver design that partially decodes the composite signal by down-converting, analog-to-digital conversion, and using a compensating null code circuit, multiplexer, ranging code generator, mixer, and code correlator to generate a locally generated reference signal, allowing for maximum correlation and minimal circuitry usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a complex receiver is used to fully decode the multiplexed binary offset carrier signal, then the signal decoding accuracy is improved, but the device complexity and energy consumption increase

Engineering Contradiction:

Improvesignal decoding accuracyVSAvoidreceiver complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The receiver performs partial decoding of the multiplexed binary offset carrier signal by processing only the dominant BOC component while leaving the non-dominant component undecoded. This partial action approach reduces the receiver complexity and energy consumption while maintaining sufficient decoding accuracy for navigation purposes, as the non-dominant component contributes minimally to the overall signal quality.

Inventive Principle:

Principle #16Partial or excessive action

2Measurement precision

If a complex receiver is used to fully decode the multiplexed binary offset carrier signal, then the signal decoding accuracy is improved, but the energy consumption increases

Engineering Contradiction:

Improvesignal decoding accuracyVSAvoidreceiver energy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The receiver performs partial decoding of the multiplexed binary offset carrier signal by processing only the dominant BOC component while leaving the non-dominant component undecoded. This partial action approach reduces the receiver complexity and energy consumption while maintaining sufficient decoding accuracy for navigation purposes, as the non-dominant component contributes minimally to the overall signal quality.

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If a complex receiver is used to fully decode the multiplexed binary offset carrier signal, then the signal decoding accuracy is improved, but the manufacturing cost increases

Engineering Contradiction:

Improvesignal decoding accuracyVSAvoidreceiver manufacturing cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The receiver performs partial decoding of the multiplexed binary offset carrier signal by processing only the dominant BOC component while leaving the non-dominant component undecoded. This partial action approach reduces the receiver complexity and energy consumption while maintaining sufficient decoding accuracy for navigation purposes, as the non-dominant component contributes minimally to the overall signal quality.

Inventive Principle:

Principle #16Partial or excessive action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables partial decoding of the composite signal with minimal signal-to-noise ratio degradation, reducing energy consumption and manufacturing costs while maintaining effective navigation signal processing.

Implementation Method 1

A receiver front-end is configured for down-converting a received composite signal

Methodology Applied

Scientific EffectFrequency down-conversion:

Implementation Method 2

An analog-to-digital converter is capable of converting the received composite signal to a digital received composite signal

Methodology Applied

Scientific EffectAnalog-to-digital conversion:

Implementation Method 3

A mixer is capable of accepting the ranging code and the precursor signal and outputting a locally generated reference signal

Methodology Applied

Scientific EffectSignal mixing:

Implementation Method 4

A code correlator can correlate the digital received composite signal to the locally generated reference signal to decode at least a first portion of the received composite signal

Methodology Applied

Scientific EffectCorrelation:

Data Source

PatentUS9048964B2Receiver and method for receiving a composite signal

Publication Date: 2015.06.02 DEERE & CO

AI summary

A first signal generator is arranged to generate a first signal. A compensating null code circuit is configured to provide a null code. A multiplexer is capable of multiplexing the first signal and the null code consistent with a predetermined time sequence for expression of the null code in a produced precursor signal. A ranging code generator is arranged for generating a ranging code. A mixer is capable of accepting the ranging code and the precursor signal and outputting a locally generated reference signal. After down-conversion and digitization of the received composite signal, the code correlator can correlate the digital received composite signal to the locally generated reference signal to decode at least a first portion of the received composite signal, while leaving a second portion of the received composite signal undecoded.