GNSS Integrated Signal Processing for Arbitrary Power Allocation
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Solution Overview
Problem
Global Navigation Satellite System (GNSS) receivers face complexity in processing integrated signals with arbitrary power allocation due to the design flexibility of Asymmetric Constant Envelope Binary Offset Carrier (ACE-BOC) multiplexing, which affects signal processing and multipath mitigation techniques.
Innovation Solution
An integrated signal processing unit generates complex rotated samples in parallel or sequentially, using a shift/phase lookup table to select phase rotation and code shift values, allowing for accumulation in bins that span arbitrary widths, enabling efficient correlation and multipath mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ACE-BOC multiplexing is used to provide design flexibility in signal components and power ratios, then service diversity and signal optimization are improved, but signal processing complexity increases
Solution Approach 1:
The integrated signal is segmented into multiple signal components, each with its own code sequence and power ratio. The processing unit separates and processes each component individually through parallel correlation operations, then recombines them to achieve complete signal processing. This segmentation allows flexible power allocation while maintaining manageable processing complexity through modular parallel operations.
2Adaptability or versatility
If arbitrary power allocation is implemented among signal components, then signal scheme optimization for different services is improved, but processing complexity in correlation and multipath mitigation increases
Solution Approach 1:
The system dynamically adjusts power ratio parameters for different signal components based on service requirements. By changing the power allocation parameters in the correlation process, the system optimizes signal detection for different services (positioning, navigation, timing) without requiring separate processing systems, thus managing complexity through parameter flexibility rather than structural complexity.
3Measurement precision
If parallel accumulation of complex rotated samples is performed in bins spanning arbitrary widths, then correlation accuracy and multipath mitigation are improved, but computational complexity increases
Solution Approach 1:
The system accumulates complex rotated samples in bins that span arbitrary widths across the code phase domain, effectively adding a dimensional flexibility to the correlation process. This allows the integration of signal energy over optimized window widths, improving correlation accuracy and multipath mitigation by capturing signal characteristics across different time scales without requiring exhaustive search of all possible bin configurations.
Data Source
AI summary
An integrated GNSS signal having a plurality of signal components with arbitrary power allocation may be processed. In an embodiment, an integrated signal processing unit of a GNSS receiver may generate in parallel complex rotated samples for a sample of the integrated signal. The complex rotated samples (e.g., early and late complex rotated samples) may be accumulated in parallel in a window that spans any arbitrary width that is less than or equal to a number of code chips in a PRN code sequence. In an embodiment, the integrated signal processing unit may sequentially generate complex rotated samples for the sample. The complex rotated samples (e.g., early, punctual, and late complex rotated samples) may be sequentially accumulated in the window. The GNSS receiver may utilize the accumulated complex rotated samples to perform correlation techniques, perform multipath mitigation techniques, and/or track the integrated signal.