Orthogonal Precoding Radar Receive Signals for Beam Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-frequency and small-wavelength wireless communications face challenges in balancing performance with environmental factors like multipath fading and the need to meet safety guidelines such as the FCC's Maximum Permitted Exposure (MPE) limit, particularly due to lack of explicit information about the operating environment and inefficient use of multiple antennas.
Innovation Solution
A wireless transceiver performs orthogonal precoding on radar receive signals using existing components like phase shifters to preserve angular information, enabling improved beam management and compliance with safety guidelines by adjusting transmission parameters based on the detected angular position of objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power levels are increased or transmit beamforming is used to compensate for higher path loss, then communication performance is improved, but power density increases which creates safety concerns
Solution Approach 1:
The system performs preliminary radar sensing to detect objects and determine angular positions before transmitting communication signals. This advance knowledge allows the system to pre-configure beamforming directions and power levels to avoid high-power transmission toward detected objects, thereby maintaining communication performance while preventing excessive power density exposure.
Solution Approach 2:
The system uses radar receive signals reflected from objects to obtain feedback information about the electromagnetic environment. This feedback is processed to determine angular positions of objects, which then feeds back into the beamforming control to adjust transmission parameters dynamically, ensuring both reliable communication and safety compliance.
2Adaptability or versatility
If multiple antennas are used for radar sensing and wireless communication, then system capability is improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by enabling the same antenna array to serve dual purposes: radar sensing for proximity detection and wireless communication for data transmission. The antenna system can switch between radar mode (for object detection and angular position determination) and communication mode (for beamforming and signal transmission), thereby improving system capability without proportionally increasing device complexity.
Solution Approach 2:
The system merges the radar sensing function and wireless communication function into a single integrated antenna array and signal processing system. By combining these functions, the patent reduces the overall device complexity compared to having separate dedicated systems, while still achieving enhanced capability through the synergistic operation of radar-based environmental awareness and communication.
3Reliability
If beamforming is steered around obstructions to maintain communication, then communication reliability is improved, but additional path loss is introduced
Solution Approach 1:
The system performs preliminary radar sensing to detect obstructions and determine their angular positions before communication transmission. This advance information allows the system to pre-steer beams around detected obstructions, avoiding direct transmission through blocking areas. By preparing the beamforming configuration in advance based on radar detection, the system maintains communication reliability while minimizing the additional path loss that would result from steering around obstructions.
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 enhances wireless communication performance while ensuring compliance with safety guidelines, allowing for increased data rates and reduced costs and size of devices by utilizing existing hardware for proximity detection and wireless communication.
Implementation Method 1
the precoding of the radar receive signals can be performed using existing components, such as phase shifters
Implementation Method 2
The radar transmit signal is modulated in frequency across multiple cycles based on one or more frequency-modulation schemes
Implementation Method 3
The at least two radar receive signals include versions of the radar transmit signal that are reflected by at least one object
Data Source
AI summary
An apparatus for is disclosed for precoding radar receive signals. The apparatus includes a wireless transceiver configured to transmit a radar transmit signal using at least one antenna. The radar transmit signal is modulated in frequency across multiple cycles based on one or more frequency-modulation schemes. The wireless transceiver is also configured to receive at least two radar receive signals using at least two other antennas. The at least two radar receive signals include versions of the radar transmit signal that are reflected by at least one object. Each of the at least two radar receive signals is modulated in frequency across the multiple cycles based on the one or more frequency-modulation schemes of the radar transmit signal. The wireless transceiver is further configured to precode the at least two radar receive signals across the multiple cycles to generate precoded radar receive signals that are orthogonal to each other.