UWB Angle Measurement Using Single Transceiver and Antenna Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current impulse radio ultra-wideband (IR-UWB) systems require multiple transmitter and receiver pairs for simultaneous angle-of-departure (AoD) and angle-of-arrival (AoA) measurements, leading to increased cost and power consumption.
Innovation Solution
Implementing a time-division multiplexing (TDM) scheme with a single transmitter and receiver using scrambled timestamp sequences (STS) based on IEEE 802.15.4z standard, allowing multiple channel impulse response (CIR) measurements within a single IR-UWB frame by switching between multiple antennas during guard band periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple transmitter and receiver pairs are used for simultaneous AoD and AoA measurements, then measurement capability is improved, but system cost and power consumption increase
Solution Approach 1:
The patent combines multiple transmitter and receiver pairs into a single shared transmitter and receiver system. By using time-division multiplexing, the single transmitter transmits to multiple receivers at different time slots, and the single receiver receives from multiple transmitters at different time slots, eliminating the need for multiple simultaneous transmitter-receiver pairs while maintaining angle measurement capability
Solution Approach 2:
The patent implements periodic time-division multiplexing where the single transmitter and receiver switch between different antenna pairs in periodic time slots. During each frame structure, different antenna combinations are activated at different time intervals to perform both AoD and AoA measurements sequentially, achieving simultaneous measurement capability through periodic time-based separation
2Measurement precision
If multiple transmitter and receiver pairs are used for simultaneous measurements, then measurement capability is improved, but power consumption increases
Solution Approach 1:
The patent merges multiple active transmitter and receiver units into a single shared unit that operates periodically. By consolidating the hardware into one transmitter and one receiver that share antenna resources through time-division multiplexing, the total power consumption is dramatically reduced compared to having multiple simultaneously operating pairs, while still achieving both AoD and AoA measurement functionality
Solution Approach 2:
The single transmitter and receiver operate in periodic time slots rather than continuously. The transmitter activates different antenna pairs at different time intervals to serve multiple receivers, and the receiver similarly operates periodically to receive from multiple transmitters. This periodic operation reduces average power consumption compared to continuous operation of multiple pairs
Data Source
AI summary
A method and device using a single transmitter (TX) and/or a single receiver (RX) is provided for determining an angle measurement between the transmitter and receiver for an ultra-wideband (UWB) system. A plurality of RX antennas is coupled to the receiver and a plurality of TX antennas is coupled to the transmitter. An IEEE 802.15.4z standard provides a silent period or gap before and after scrambled timestamp sequences (STS) in a frame. An active antenna is switched to a different antenna in the gaps. This allows the angle measurements to be performed with only a single transmitter and receiver within one channel impulse response (CIR) measurement cycle.