OAM Multiplexing with Mismatched Antenna Subarray Counts
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently multiplexing orbital angular momentum (OAM) signals due to differences in the quantities of transmit and receive antenna subarrays, leading to increased complexity in decoding signals.
Innovation Solution
The system employs a configuration where the transmitting device includes a first quantity of antenna subarrays and the receiving device includes a second quantity of antenna subarrays, with the ability to dynamically adjust these quantities based on channel conditions and device capabilities. This configuration allows for the use of different sets of OAM weights and modes at the transmitting and receiving devices, enabling efficient OAM multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the transmitting device uses a different quantity of antenna subarrays than the receiving device, then OAM multiplexing capability is improved, but decoding complexity increases
Solution Approach 1:
The patent segments the OAM signal processing into distinct transmit and receive sides, where the transmitting device applies OAM weights to generate multiple OAM modes using its antenna subarrays, and the receiving device independently processes the received signals using its own antenna subarray configuration. This segmentation allows each device to operate with different quantities of antenna subarrays without requiring complex coordination for decoding.
Solution Approach 2:
Instead of requiring the receiving device to adapt to the transmitting device's antenna configuration (which would increase decoding complexity), the patent inverts the approach by having the transmitting device generate OAM signals based on the receiving device's antenna subarray quantity. The transmit device obtains the receive antenna subarray quantity and configures its OAM weight application accordingly, thereby simplifying the receive device's decoding process.
2Measurement precision
If the transmitting device configures OAM weights based on receiving device antenna subarrays, then signal decoding accuracy is improved, but communication flexibility is reduced
Solution Approach 1:
The patent implements a dynamic configuration mechanism where the transmitting device adapts its OAM weight application based on the receiving device's antenna subarray quantity, which is obtained through communication between the devices. This dynamic adaptation allows the system to optimize decoding accuracy for each specific communication scenario while maintaining flexibility to adjust to different device configurations. The OAM weight configuration is not fixed but dynamically determined based on the receive device's capabilities.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support orbital angular momentum (OAM) communications between a transmitting device and a receiving device. The transmitting device may generate signals for transmission to the receiving device via a transmitter circle that includes a first quantity of antenna arrays. The transmitting device may transmit the signals using the transmitter circle based on multiple sets of OAM weights, where each signal may be associated with a respective set of OAM weights. The receiving device may receive the signals using a receiver circle that includes a second quantity of antenna arrays that is different than the first quantity. The receiving device may decode the signals based on multiple sets of OAM weights. The sets of OAM weights at the transmitting device and the receiving device may be based on the first quantity being different than the second quantity.