Coordinated Beam Scan for 3D Object Reconstruction
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Solution Overview
Problem
High-frequency wireless communication devices face challenges in balancing performance with maximum permitted exposure limits due to path loss and radiation safety concerns, particularly when operating in proximity to users, as they require high transmit power that can exceed safety guidelines.
Innovation Solution
The use of coordinated beam scanning techniques with multiple antenna arrays to detect objects and reconstruct their 3D location, allowing for simultaneous transmission and reception beams to be directed at the same location, enabling the adjustment of transmission parameters to comply with safety guidelines without additional sensors, and utilizing existing transceiver hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmit power levels are increased to compensate for higher path loss, then communication performance is improved, but radiation exposure exceeds safety guidelines
Solution Approach 1:
The patent applies local quality by directing transmit and receive beams to intersect at specific target locations in space, creating localized high-energy regions only where needed for detection. This allows high transmit power to be focused on specific spatial zones rather than radiating uniformly in all directions, thereby improving detection capability while limiting overall radiation exposure to comply with safety guidelines.
Solution Approach 2:
The patent makes the transceiver hardware multi-functional by using the same antenna arrays for both wireless communication and radar-based object detection. This eliminates the need for separate sensors and allows the system to perform proximity detection and 3D reconstruction using existing communication infrastructure, thereby reducing additional radiation sources while maintaining safety compliance.
2Loss of energy
If beamforming is used to concentrate energy in a particular direction, then path loss is compensated, but transmission parameters must be carefully controlled to meet MPE limits
Solution Approach 1:
The patent implements feedback by using the receive antenna array to detect reflected signals from objects and determine their locations. This detection information feeds back to the transmit antenna array, which then adjusts beamforming parameters to intersect beams at the detected object locations. This closed-loop approach automatically optimizes transmission parameters for both path loss compensation and MPE limit compliance without requiring complex manual control.
Solution Approach 2:
The patent applies preliminary action by performing object detection and determining object locations before directing transmit beams to intersect with receive beams at those specific locations. This preliminary detection step allows the system to pre-calculate appropriate beamforming parameters that will achieve both energy concentration for path loss compensation and controlled exposure for MPE compliance.
3Object-affected harmful factors
If additional sensors are introduced to detect objects for proximity detection, then radiation safety can be ensured, but device complexity and cost increase
Solution Approach 1:
The patent makes the transceiver hardware multi-functional by using the same antenna arrays for both wireless communication and radar-based object detection. This eliminates the need for separate sensors and allows the system to perform proximity detection and 3D reconstruction using existing communication infrastructure, thereby reducing additional radiation sources while maintaining safety compliance.
Solution Approach 2:
The patent applies self-service by enabling the communication device to detect objects and determine their locations using its own transmit and receive antenna arrays. The system uses reflected signals from objects to create a radar detection capability, allowing the device to self-monitor its radiation environment and automatically adjust transmission parameters to ensure safety without requiring external sensors or additional hardware.
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 effectively detects human proximity and adjusts transmission parameters to meet safety guidelines, reducing radiation exposure while maintaining communication performance, and enables three-dimensional reconstruction of objects using existing hardware without introducing new sensors.
Implementation Method 1
forming a first millimeter wave beam having a first shape and positioned in space by transmitting signals from a first antenna array
Implementation Method 2
In response to detection of reflected signals based on reception associated with the second millimeter wave beam, the techniques can include detecting an object at the target location
Data Source
AI summary
Certain embodiments are directed to techniques (e.g., a device, a method, a memory or non-transitory computer readable medium storing code or instructions executable by one or more processors) for object detection and three-dimensional reconstruction of objects using coordinated beam scanning. The disclosed techniques teach coordinated beam scanning that can be used for both detecting proximity to personnel in addition to detecting objects for three-dimensional object reconstructions. The techniques form one or more millimeter wave beam that can be electronically steered by adjusting the phase of the various antenna elements. The techniques can include saving the plurality of grid points for which the object is detected to a memory for detecting a range to the object for Maximum Permitted Exposure (MPE) limit monitoring and three-dimensional object reconstruction.