Wireless Ranging Signal Sequencing for Channel-Adaptive Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ranging methods in wireless systems suffer from low accuracy due to the inability to dynamically adjust signal power allocation based on channel state information, leading to suboptimal ranging performance.
Innovation Solution
A ranging method that determines a time or frequency domain sequence for a ranging signal based on channel state information, allowing for dynamic selection and power allocation to improve accuracy, using discrete sequences and resource units to represent the signal's features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing reference signals (SRS, PRS) are used for ranging, then ranging function is implemented, but ranging accuracy is low
Solution Approach 1:
The patent applies dynamics by enabling the receiver to dynamically select between time domain sequence and frequency domain sequence based on measured channel state information. The system transitions from static reference signals to adaptive signal processing where the receiver determines the optimal domain for ranging based on current channel conditions, thereby improving ranging accuracy while maintaining adaptability.
Solution Approach 2:
The patent changes the parameter representation of the ranging signal by transforming between time domain and frequency domain sequences based on channel state. When the channel state indicates better conditions in one domain, the system switches to using that domain's sequence for ranging, effectively changing the operational parameter to match channel characteristics and improve measurement precision.
2Measurement precision
If power is allocated uniformly to all resource units, then resource allocation is simple, but ranging accuracy is reduced due to inability to optimize for channel conditions
Solution Approach 1:
The patent applies local quality by allocating different power levels to different resource units based on their specific channel conditions. Instead of uniform power distribution, the system identifies resource units with better channel states and allocates higher power to them, while using lower power for resource units in poorer conditions. This localized optimization improves overall ranging accuracy without requiring complex global optimization.
Solution Approach 2:
The patent implements preliminary action by having the receiver first measure the channel state information before performing ranging. Based on these preliminary measurements, the system determines the optimal time or frequency domain sequence and相应的 power allocation strategy, ensuring that the ranging process uses pre-optimized parameters tailored to current channel conditions.
Data Source
AI summary
A ranging method receives, by a first communication apparatus from a second communication apparatus, a first ranging signal and information corresponding to a second ranging signal, wherein the information indicates a time domain sequence or a frequency domain sequence of the second ranging signal, the time domain sequence or the frequency domain sequence is determined based on channel state information obtained by the first communication apparatus through measurement, and the first ranging signal is a signal formed after the second ranging signal sent by the second communication apparatus passes through a channel. Ranging is performed based on the first ranging signal and the time domain sequence or the frequency domain sequence of the second ranging signal.