Rotated Antenna Subarrays to Reduce Spatial Aliasing
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving communication reliability and reducing spatial aliasing effects, particularly in directional communication using antenna subarrays.
Innovation Solution
The implementation of rotated antenna arrays, where each antenna subarray of a first array is offset from each antenna subarray of a second array by a specific angular offset, to enhance communication reliability and mitigate spatial aliasing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If antenna subarrays are aligned between transmitting and receiving devices, then device complexity is reduced, but spatial aliasing effects increase and communication reliability deteriorates
Solution Approach 1:
The patent applies asymmetry by intentionally misaligning the antenna subarrays between transmitting and receiving devices. Specifically, the receiving device's antenna subarrays are rotated by an angular offset relative to the transmitting device's antenna subarrays, creating an asymmetric configuration that reduces spatial aliasing effects and improves communication reliability while maintaining manageable device complexity through standardized array structures.
2Ease of operation
If antenna subarrays are aligned between transmitting and receiving devices, then ease of operation is improved, but spatial aliasing effects increase and throughput decreases
Solution Approach 1:
The patent implements asymmetry by rotating the receiving device's antenna subarrays by a specific angular offset (e.g., 45 degrees) relative to the transmitting device's antenna subarrays. This asymmetric arrangement reduces spatial aliasing effects, thereby improving communication throughput and signal quality while maintaining ease of operation through standardized array configurations and systematic alignment procedures.
3Reliability
If antenna subarrays are offset by angular offset, then spatial aliasing is reduced and communication reliability improves, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing a specific angular offset parameter (e.g., 45 degrees) between the transmitting and receiving antenna subarrays. This controlled parameter change reduces spatial aliasing effects and improves communication reliability while keeping device complexity manageable through standardized array structures and systematic configuration methods.
4Object-generated harmful factors
If antenna subarrays are offset by angular offset, then spatial aliasing effects are reduced and noise decreases, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements parameter changes by specifying a discrete angular offset value (e.g., 45 degrees) between antenna subarrays, which reduces spatial aliasing and noise while maintaining reasonable manufacturing precision requirements through standardized array configurations and tolerable angular deviations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A transmitting device may include a first set of antenna arrays disposed in a first shape and a receiving device may include a second set of antenna arrays disposed in a second shape. A first axis that intersects an antenna array of the first set of antenna arrays and a centroid of the first shape may be offset from a vertical direction by a first angular offset. A second axis that intersects an antenna array of the second set of antenna arrays and a centroid of the second shape may be offset from the vertical direction by a second angular offset that is different than the first angular offset. The transmitting device may transmit signaling to the receiving device using the first and second sets of antenna arrays, respectively based on difference between the first and second angular offsets.