Single-Chain Angle-of-Arrival Estimation via Antenna Switching
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Solution Overview
Problem
Existing wireless receivers with multiple receive chains are costly, complex, and consume high power, making accurate angle of arrival (AOA) measurements challenging.
Innovation Solution
A wireless device with a single receive chain and multiple antennas, utilizing predefined signals in existing wireless protocols to determine AOA by receiving and switching between antennas, leveraging signals like preambles and pilot carriers for phase difference measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple receive chains are used to perform AOA measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the receive process into multiple time slots, where each antenna receives a portion of the transmission during different time periods. This temporal segmentation allows a single receive chain to process signals from multiple antennas sequentially, achieving AOA measurement capability without requiring multiple simultaneous receive chains.
Solution Approach 2:
The patent transitions from a spatial parallel architecture (multiple receive chains operating simultaneously) to a temporal sequential architecture (single receive chain operating at different times). By adding the time dimension to the signal reception process, the system achieves the same functional capability with reduced hardware complexity.
2Measurement precision
If multiple receive chains are used to perform AOA measurement, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent segments the receive process into multiple time slots, where each antenna receives a portion of the transmission during different time periods. This temporal segmentation allows a single receive chain to process signals from multiple antennas sequentially, achieving AOA measurement capability without requiring multiple simultaneous receive chains.
Solution Approach 2:
The patent transitions from a spatial parallel architecture (multiple receive chains operating simultaneously) to a temporal sequential architecture (single receive chain operating at different times). By adding the time dimension to the signal reception process, the system achieves the same functional capability with reduced hardware complexity.
3Measurement precision
If multiple receive chains are used to perform AOA measurement, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent segments the receive process into multiple time slots, where each antenna receives a portion of the transmission during different time periods. This temporal segmentation allows a single receive chain to process signals from multiple antennas sequentially, achieving AOA measurement capability without requiring multiple simultaneous receive chains.
Solution Approach 2:
The patent transitions from a spatial parallel architecture (multiple receive chains operating simultaneously) to a temporal sequential architecture (single receive chain operating at different times). By adding the time dimension to the signal reception process, the system achieves the same functional capability with reduced hardware complexity.
Data Source
AI summary
Techniques for determining an angle-of-arrival of a wireless transmission are provided, including receiving, with a first antenna, at least a first portion of a wireless transmission, determining when a second portion of the wireless transmission will be received, switching to the second antenna to receive the second portion of the wireless transmission, determining an angle of arrival of the wireless transmission based on the first portion and the second portion of the wireless transmission, and outputting the angle of arrival of the wireless transmission.