Multi-channel RF Unit for Satellite Navigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multisystem navigational satellite receivers are limited by a single common signal input and fixed channels, restricting signal combinations and increasing position coordinate errors, while also consuming more energy and being less compact.
Innovation Solution
A multichannel multisystem radio-frequency unit with four independently configurable reception channels, automatic intermediate frequency filter band calibration, and two heterodyne frequency synthesizers, allowing for simultaneous reception of multiple satellite systems with improved signal processing and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single common signal input and fixed channels are used, then device complexity is reduced, but signal combination flexibility and location accuracy deteriorate
Solution Approach 1:
The receiver is divided into four independent reception channels, each capable of separately processing signals from different satellite navigation systems. This segmentation allows flexible signal combinations while maintaining manageable device complexity through modular design.
Solution Approach 2:
The reception channels are made dynamically configurable rather than fixed, allowing the system to adaptively select and process different satellite signal combinations based on operational requirements, thereby improving signal combination flexibility without proportionally increasing complexity.
2Measurement precision
If multiple satellite systems are received simultaneously with fixed channels, then location accuracy improves, but energy consumption increases
Solution Approach 1:
The system dynamically configures reception channels based on the specific combination of satellite systems needed for accurate positioning. This allows the receiver to process multiple satellite systems simultaneously when required for improved accuracy, while consuming energy only for the necessary channels rather than all channels continuously.
Solution Approach 2:
The reception channel parameters (such as frequency tuning and gain settings) are dynamically changed to match the specific satellite signals being processed. This enables efficient energy usage by optimizing channel parameters for the current operational mode rather than maintaining fixed high-power settings for all possible signal combinations.
3Productivity
If more reception channels are added to handle multiple satellite systems, then signal processing capability improves, but device compactness deteriorates
Solution Approach 1:
Four reception channels are merged into a unified modular architecture with shared components such as frequency synthesizers, mixers, and signal processing circuits. This combining approach maintains high signal processing capability for multiple satellite systems while reducing the overall device volume compared to having completely separate processing paths for each channel.
Solution Approach 2:
The reception channels are designed with universal, multi-functional components that can process different satellite navigation signals through reconfiguration. This multi-functionality allows the same hardware infrastructure to handle multiple satellite systems simultaneously, improving signal processing capability without proportionally increasing device volume.
4Reliability
If independent configurable channels are implemented, then interference immunity improves, but device complexity increases
Solution Approach 1:
The receiver is segmented into four independently configurable channels, each with separate signal paths and processing circuits. This segmentation provides inherent interference immunity by isolating signal processing for different satellite systems, preventing cross-interference while maintaining manageable complexity through the modular structure.
Solution Approach 2:
The channels are dynamically configurable to adapt to different operational scenarios and interference conditions. This dynamic capability allows the system to optimize channel allocation and parameters to maximize interference immunity for the current signal environment, rather than relying on fixed configurations that may be suboptimal under varying conditions.
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
Enhances location accuracy, reduces energy consumption, and increases compactness by enabling simultaneous reception of multiple satellite systems with improved signal processing and interference immunity.
Implementation Method 1
two heterodyne frequency synthesizers, forming heterodyne signals for quadrature mixers of reception channels
Data Source
AI summary
A multisystem radio-frequency unit of navigational satellite receivers usable for simultaneous reception of any combination of navigation satellite signals from multiple navigation systems. The unit includes four identical independently configurable reception channels, an automatic intermediate frequency filter band calibration system and two heterodyne frequency synthesizers, forming heterodyne signals for quadrature mixers of reception channels and clock signals for a correlator. Each reception channel includes a two-stage automatic gain control system. During operation, a heterodyne frequency synthesizer is capable of generating any heterodyne frequency using any reference frequency, wherein heterodyne frequency, located either symmetrically or asymmetrically between spectra of received global navigation satellite signals.