Distributed Transceiver ICs for Low-Loss Active Antenna Arrays
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently distributing and processing RF signals across antenna radiating elements, particularly in active antenna units, leading to power loss and noise degradation due to long connections between transceiver ICs and radiating elements.
Innovation Solution
A transceiver integrated circuit with two serial data ports is distributed across an active antenna unit, allowing for intelligent packet forwarding and local processing, including iFFT for DL and FFT for UL data, with integrated digital power amplifiers and multi-phase carrier generators to convert signals for transmission, and time-domain processing to minimize power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If transceiver ICs are connected to radiating elements through long connections, then signal distribution is achieved, but power loss and noise degradation occur
Solution Approach 1:
The patent divides the active antenna unit into multiple distributed transceiver ICs, each handling a subset of radiating elements. This segmentation reduces the connection length from each IC to its associated elements, thereby minimizing power loss and noise degradation while maintaining comprehensive signal distribution across the antenna array.
Solution Approach 2:
The patent transitions from a centralized transceiver architecture to a distributed spatial arrangement of multiple ICs across the antenna unit. This dimensional redistribution optimizes the physical layout, reducing average connection lengths and improving signal integrity without compromising coverage.
2Loss of energy
If multiple transceiver ICs are distributed across the antenna unit, then power loss is reduced, but device complexity increases
Solution Approach 1:
Each distributed transceiver IC is designed as a universal module capable of performing identical functions (signal processing, amplification, and transmission) for its associated radiating elements. This multi-functionality approach standardizes the architecture, reducing overall system complexity despite the increased number of ICs.
Solution Approach 2:
The patent changes the architectural parameter from centralized to distributed configuration, optimizing the trade-off between power loss reduction and device complexity. By carefully selecting the number and placement of ICs, the system achieves minimal connection lengths while maintaining manageable complexity through parameter optimization.
3Productivity
If intelligent packet forwarding is implemented, then signal processing efficiency is improved, but device complexity increases
Solution Approach 1:
Each transceiver IC is equipped with intelligent packet forwarding capability, allowing it to autonomously process and forward IQ data packets without requiring centralized control. This self-service approach improves signal processing efficiency by enabling parallel operations while maintaining relatively simple individual IC designs.
Solution Approach 2:
The packet header inspection circuit performs preliminary analysis of incoming packets to determine routing decisions before full processing occurs. This preliminary action enables efficient intelligent forwarding by pre-determining the destination of each packet, reducing overall processing time and improving productivity.
Data Source
AI summary
Transceiver integrated circuit suitable for distributed placement across an active antenna unit. ICs with two serial data ports configured to transmit and receive aggregated signal-port IQ data packets with adjacent ICs within a subarray of ICs, or to a beamformer processor. A packet header inspection circuit may identify aggregated signal-port IQ data packets for local processing, and identify received aggregated signal-port IQ data packets for processing by another device.