Multi-Frequency Wireless Positioning via Phase Analysis
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving accurate positioning due to limitations in signal bandwidth, complexity, and latency, which affect the precision of distance measurements and positioning technologies.
Innovation Solution
The proposed solution involves an apparatus and method for wireless communication systems that utilize multiple frequency components to transmit and receive signals. Each frequency component represents a bandwidth-limited signal with a unique center frequency, and the system processes and transmits phase relationship information to determine positioning information, such as distance and position, by analyzing the phase relationships between these frequency components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single wideband signal is used for positioning, then the accuracy of distance measurements can be improved, but the device complexity and resource requirements increase
Solution Approach 1:
The patent divides the wideband signal into multiple frequency components (subcarriers) with different center frequencies. Each frequency component is processed independently through its own transmit and receive chains, allowing the system to achieve wideband positioning accuracy without requiring a single complex wideband signal processing chain. The frequency components are then combined to determine the final positioning information.
2Measurement precision
If multiple frequency components are transmitted simultaneously, then the accuracy of positioning can be enhanced through phase relationship analysis, but the transmission resources and processing complexity increase
Solution Approach 1:
The patent combines multiple frequency components in the frequency domain to determine positioning information. Instead of transmitting separate wideband signals, the system transmits multiple narrower frequency components that are later combined through phase relationship analysis to achieve the positioning function, thereby reducing the resources required for each individual transmission.
Solution Approach 2:
The patent transitions from the time domain to the frequency domain for signal processing. By analyzing phase relationships between multiple frequency components in the frequency domain, the system achieves positioning accuracy without requiring high-time-resolution measurements, thus reducing the transmission resources and processing complexity needed in the time domain.
3Measurement precision
If phase relationship information is processed for multiple frequency components, then positioning accuracy is improved, but the processing time and latency increase
Solution Approach 1:
The patent performs preliminary processing of each frequency component independently, including phase extraction and alignment, before combining the results. This preliminary action allows for optimized phase relationship analysis that reduces the overall processing time required to determine positioning information, as the individual component processing can be parallelized and the combination operation is efficiently performed in the frequency domain.
Data Source
AI summary
An apparatus of a wireless communication system according to an embodiment is provided. For each frequency component of two or more frequency components, a transmitter of the wireless communication system is configured to transmit, within said frequency component, a transmit signal of said frequency component. A receiver of the wireless communication system is configured to receive, within said frequency component, the transmit signal of said frequency component, which has been transmitted by the transmitter, as a received signal of said frequency component. Each frequency component of the two or more frequency components represents a bandwidth limited signal, which comprises one or more signal portions, and which exhibits a center frequency, wherein the center frequency of each of the two or more frequency components is different from the center frequency of any other one of the two or more frequency components.