Radar Antenna Selection Circuit for AoA Estimation
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Solution Overview
Problem
Traditional FMCW radar systems for Angle of Arrival estimation require multiple receiving paths, leading to increased power consumption, larger chip size, and the need for local oscillator phase correction.
Innovation Solution
The radar apparatus includes a transmitting circuit, multiple transmitting and receiving antennas, a receiving circuit, a selection controller, and a selection circuit. The selection circuit selects one transmitting antenna and one receiving antenna based on control signals generated by the selection controller, allowing for time-division transmission and reception, which reduces the number of active paths and components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple receiving paths are used for Angle of Arrival estimation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the receiving operation into time segments, where different receiving antennas are activated in different time periods. This temporal segmentation allows the system to achieve multiple receiving paths without simultaneously activating all receivers, thereby reducing device complexity while maintaining measurement precision for Angle of Arrival estimation.
Solution Approach 2:
The patent implements periodic switching between different receiving antennas based on the detection signal period. By using periodic action to alternate between receivers, the system achieves the functionality of multiple simultaneous receiving paths while actually using only one receiver at a time, thus reducing complexity.
2Measurement precision
If multiple receiving paths are used for Angle of Arrival estimation, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent segments the receiving operation over time, activating only one receiving antenna per time period. This segmentation strategy enables the system to achieve the precision of multiple receivers while consuming energy equivalent to a single receiver, as only one receiver is active at any given moment.
Solution Approach 2:
By using periodic switching to alternate between receivers synchronized with the detection signal period, the patent reduces power consumption compared to having multiple receivers simultaneously active, while still achieving the measurement precision required for Angle of Arrival estimation.
3Measurement precision
If multiple receiving paths are used for Angle of Arrival estimation, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the receiving function across time rather than integrating multiple receivers simultaneously in the hardware. This temporal segmentation allows for a more compact chip design, as only one receiver needs to be physically implemented while the system achieves multi-path functionality through time-division multiplexing.
Solution Approach 2:
The periodic switching mechanism allows the system to simulate multiple receiving paths using a single physical receiver, thereby reducing the chip area required for receiver components while maintaining the measurement precision needed for Angle of Arrival estimation.
4Measurement precision
If multiple receiving paths are used for Angle of Arrival estimation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the reception function over time, using a single receiver to serve multiple receiving paths through temporal multiplexing. This approach enables accurate identification of multiple targets at the same distance while avoiding the complexity of implementing multiple simultaneous receivers.
Solution Approach 2:
The system uses periodic switching to alternate between different receiving antennas synchronized with the detection signal period. This periodic action enables the system to achieve the identification accuracy of multiple receivers while using only one physical receiver, thereby reducing device complexity.
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 configuration reduces power consumption, chip size, and phase error correction needs, while allowing for accurate Angle of Arrival estimation and improved identification of multiple targets at the same distance.
Implementation Method 1
The transmitting antennas are configured to transmit the transmission signal
Implementation Method 2
The receiving antennas are configured to receive a reflected signal, in which the reflected signal is generated by the transmission signal being reflected by an external object
Implementation Method 3
the reflected signal is generated by the transmission signal being reflected by an external object
Data Source
AI summary
A transceiving method of signals and a radar apparatus are provided. The radar apparatus includes a transmitting circuit, multiple transmitting antennas, multiple receiving antennas, a receiving circuit, a selection controller and a selection circuit. The transmitting circuit generates a transmission signal based on the detection signal, wherein the detection signal has periodic changes. The transmitting antenna transmits a transmission signal. The receiving antenna receives a reflected signal. The receiving circuit generates an internal signal based on the detection signal and a radio frequency signal. The selection controller generates a control signal based on the period of the detection signal. The selection circuit selects one of multiple transmitting antennas to transmit the transmission signal and selects one of multiple receiving antennas to receive the reflected signal to generate the radio frequency signal based on the control signal generated by the selection controller.