UWB Receiver Filtering and Ranging With Low-Precision Clocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing UWB communication systems face challenges in achieving low power consumption while providing accurate range finding and location capabilities without the need for additional complex components like GPS or ultrasonic/laser range finding circuits.
Innovation Solution
The implementation of a method using an N-path filter in a UWB receiver, employing a low precision clock source in combination with an energy detector, and a synchronization method between UWB transceivers to establish a range by calculating the time of flight of UWB pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional complex components like GPS or ultrasonic/laser range finding circuits are added to provide accurate range finding and location capabilities, then measurement precision is improved, but device complexity and power consumption increase
Solution Approach 1:
The UWB transceiver is designed to perform both communication and range finding functions using the same hardware components. The time of flight measurement capability is integrated into the existing transceiver architecture, allowing a single device to serve multiple purposes without requiring separate GPS or ultrasonic range finding circuits.
Solution Approach 2:
The UWB system uses its own transmitted pulses to perform range finding measurements. By measuring the time of flight of its own signals, the system provides location capabilities independently without relying on external infrastructure like GPS satellites or separate ranging devices.
2Measurement precision
If additional complex components like GPS or ultrasonic/laser range finding circuits are added to provide accurate range finding and location capabilities, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The UWB transceiver is designed to perform both communication and range finding functions using the same hardware components. The time of flight measurement capability is integrated into the existing transceiver architecture, allowing a single device to serve multiple purposes without requiring separate GPS or ultrasonic range finding circuits.
Solution Approach 2:
The UWB system uses its own transmitted pulses to perform range finding measurements. By measuring the time of flight of its own signals, the system provides location capabilities independently without relying on external infrastructure like GPS satellites or separate ranging devices.
3Productivity
If pulse repetition rate is increased to enable high data rate communications, then productivity is improved, but susceptibility to intersymbol interference increases
Solution Approach 1:
The system changes the pulse shape parameters by applying a Gaussian envelope to the pulses. This Gaussian pulse shaping provides better time localization and reduces tail effects, allowing higher pulse repetition rates while minimizing intersymbol interference. The parameter optimization includes adjusting pulse width, amplitude, and temporal distribution.
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
This approach enables UWB communication systems to achieve low power consumption while providing accurate range finding and location capabilities, eliminating the need for additional complex components and maintaining robustness in noisy environments.
Implementation Method 1
calculating the time of flight of UWB pulses
Data Source
AI summary
Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Such UWB systems through their receivers may operate in the presence of interfering signals and should provide for robust communications. Accordingly, an accurate and sharp filter that operates at low power is required and beneficially one that does not require a highly accurate power heavy clock. Further, many UWB applications require location and/or range finding of other elements and it would therefore be beneficial to provide a UWB based range finding and/or location capability removing the requirement to add additional device complexity and, typically significant, power consumption.