Receiver Layout for 2D Incoming Wave Angle Estimation
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Solution Overview
Problem
Existing angle estimation techniques using the Annihilating Filter (AF) method can only perform one-dimensional angle estimation, limiting the ability to accurately estimate both elevation and azimuth angles of incoming waves.
Innovation Solution
A receiver system is developed with multiple linear array antennas at different heights, employing Annihilating Filter (AF) methods to estimate azimuth and elevation angle phase differences, allowing for two-dimensional angle estimation of incoming waves by processing reception signals through specialized circuitry and filters to determine the phases and amplitudes of incoming waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single linear array antenna is used with the AF method, then azimuth angle estimation can be performed, but only one-dimensional angle estimation is achieved and elevation angle cannot be estimated
Solution Approach 1:
The patent transitions from one-dimensional azimuth angle estimation to two-dimensional angle estimation by adding a vertical dimension. This is achieved by deploying multiple linear array antennas at different heights (first linear array antenna at height h1, second linear array antenna at height h2), enabling the system to estimate both azimuth angles (θ1, θ2) and elevation angles (φ1, φ2) of incoming waves.
Solution Approach 2:
The patent divides the reception system into multiple independent linear array antennas positioned at different heights. Each antenna array independently performs AF-based azimuth angle estimation, and the results from multiple arrays are combined to achieve elevation angle estimation, thereby segmenting the overall angle estimation task into manageable components.
2Measurement precision
If multiple linear array antennas at different heights are deployed, then two-dimensional angle estimation including elevation angle can be performed, but device complexity increases
Solution Approach 1:
Multiple linear array antennas are deployed to serve dual purposes: each array independently performs azimuth angle estimation while collectively enabling elevation angle estimation. The same AF method and processing circuitry are reused across multiple arrays, allowing the system to achieve two-dimensional angle estimation without proportionally increasing processing complexity.
Data Source
AI summary
A receiver accurately performs, using an annihilation filter, angle estimation in two-dimensional directions of an incoming wave. The receiver operates with at least two linear array antenna. The receiver may be implemented in a radar apparatus includes the receiver, as well as a vehicle and a communication system, which also include the receiver.