Multi-Band Positioning Receiver Clocking for Phase-Aligned Sampling
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining the position of mobile devices across multiple frequency ranges, particularly in 5G networks, due to the need for improved spectral efficiency and reduced latency, which current methods do not adequately address.
Innovation Solution
A positioning signal receiver with multiple receive chains processes signals from different frequency ranges using analog-to-digital converters (ADCs) operated at distinct sampling rates, synchronized in phase to enhance positioning accuracy across varied frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple receive chains with different sampling rates are used to process positioning signals across different frequency ranges, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The system divides the positioning signal processing into multiple receive chains, where each chain is dedicated to a specific frequency range with its own ADC operating at an optimized sampling rate. This segmentation allows each chain to be independently optimized for its frequency band, improving overall positioning accuracy while managing complexity through modular architecture
Solution Approach 2:
Multiple receive chains are designed to handle different frequency ranges (e.g., L5, E5, B3 bands) using a common architectural framework. The chains share common functionality such as clock synchronization and signal processing algorithms, allowing the system to process multiple frequency ranges simultaneously while reducing redundant complexity
2Stability of the object's composition
If a common clock signal is used to synchronize multiple ADCs operating at different sampling rates, then phase alignment is achieved, but device complexity increases
Solution Approach 1:
A common clock signal acts as an intermediary that synchronizes multiple ADCs operating at different sampling rates. The clock signal provides a reference timing mechanism that ensures phase alignment between digital signals from different frequency ranges, enabling coherent signal processing while maintaining independent sampling rate optimization for each receive chain
Data Source
AI summary
A positioning signal processing method includes: receiving, wirelessly at an apparatus, a first positioning signal in a first frequency range; receiving, wirelessly at the apparatus, a second positioning signal in a second frequency range; converting the first positioning signal by a first analog-to-digital converter (ADC) of the apparatus to produce a first digital signal at a first sampling rate that is based on a clock signal; and converting the second positioning signal by a second ADC of the apparatus to produce a second digital signal at a second sampling rate that is based on the clock signal and that is different from, and related to, the first sampling rate.