Satellite Navigation Receiver Architecture with Remote Authentication
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Solution Overview
Problem
Current satellite radio navigation systems face increased complexity and cost due to the need for complex cryptographic processing operations to secure and authenticate signals, which hinders miniaturization and consumption reduction, especially when improving precision and detecting spoofing.
Innovation Solution
Implementing a system with shared signal acquisition and tracking means at reference stations that perform remote processing, reducing measurement errors and enhancing robustness and integrity by using centralized processing units for authentication and integrity checks, and eliminating the need for cryptographic operations in user receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex cryptographic processing operations are implemented in receivers to secure and authenticate GNSS signals, then security and integrity are improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the complex cryptographic processing operations from the user receiver and relocates them to a reference station. The receiver only performs simple signal acquisition and tracks satellites, while the reference station handles all cryptographic operations including decryption of P(Y) signals, authentication, and integrity verification. This extraction resolves the contradiction by maintaining high security requirements while dramatically simplifying the receiver architecture.
Solution Approach 2:
The reference station acts as an intermediary between the GNSS satellites and the user receiver. It receives the raw satellite signals, performs all cryptographic processing and authentication, then transmits the verified navigation data to the receiver. This intermediary approach allows the receiver to benefit from secure authenticated signals without implementing complex cryptographic functions itself.
2Reliability
If cryptographic processing operations are implemented in receivers to detect spoofing and perform integrity checks, then security is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts expensive cryptographic processing hardware from the receiver and concentrates it at the reference station. The receiver becomes a simple signal acquisition device without cryptographic modules, dramatically reducing manufacturing cost. The reference station, which serves multiple users, bears the cost of cryptographic operations, making spoofing detection capability accessible to all users without individual receivers needing expensive hardware.
3Measurement precision
If complex processing operations are implemented in receivers to improve precision and detect spoofing, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts complex signal processing operations from the receiver and relocates them to the reference station. The receiver only performs basic signal acquisition and satellite tracking, while the reference station executes sophisticated processing including ionospheric correction, multipath mitigation, and precision navigation calculations. This maintains high measurement precision while simplifying the receiver to minimal necessary functions.
Data Source
AI summary
Station for receiving satellite radio navigation signals having first wideband transceiver for receiving a specific signal transmitted by a transmitter/receiver and extracting therefrom at least one user radio navigation signal, a first centralized configured for determining a measurement of pseudo distance and a centralized calculator for calculating navigation information (PVT), the reception station having a first reference channel for receiving radio navigation signals having a directional antenna for forming a channel, a second processor for processing the radio navigation signal received by the directional antenna for forming a channel and a calculation unit that is suited to performing an improvement in reliability, an integrity check and authentication of the navigation information (PVT).