Beamforming Repeater Gain Control for Leakage Isolation
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Solution Overview
Problem
Wireless repeaters in communication systems face signal interference due to radiation leakage, which affects signal quality and stability, especially in scenarios with path-loss and physical blockers.
Innovation Solution
A configurable beamforming repeater that adjusts its receiver and transmitter beamformers to reduce interference, utilizing a signal processing chain with power amplifiers and feedback paths to monitor and adjust gains, ensuring improved isolation between reception and transmission paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wireless repeaters are used to extend signals, then signal coverage is improved, but radiation leakage causes signal interference and instability
Solution Approach 1:
The repeater system is divided into separate reception and transmission antenna arrays, with distinct beamforming processing chains for each function. This segmentation allows independent optimization of receive and transmit beams, enabling better isolation between the two paths while maintaining extended signal coverage.
Solution Approach 2:
The patent introduces spatial dimensionality through beamforming, directing signals in specific directions rather than omnidirectional transmission. By controlling the spatial orientation of transmit and receive beams, the system achieves frequency-selective and spatial-selective isolation, reducing radiation leakage interference while maintaining coverage extension.
2Reliability
If beamforming is used to direct signals, then signal quality is improved, but device complexity increases
Solution Approach 1:
The beamforming system employs dynamic beam control where the beamformer adjusts beam directions and characteristics in real-time based on channel conditions. This dynamic adaptation allows the system to maintain high signal quality through optimal beam alignment while reducing complexity by responding only to actual channel variations rather than using fixed complex structures.
Solution Approach 2:
The system implements feedback mechanisms where the beamforming controller receives information about signal quality and channel conditions, then adjusts beamforming parameters accordingly. This feedback loop enables the system to achieve high signal quality through adaptive control rather than requiring overly complex predetermined beamforming structures.
3Power
If gain adjustment is used to compensate for path-loss, then signal strength is improved, but interference from retransmission increases
Solution Approach 1:
The system applies different gain characteristics to different spatial directions and frequency bands through beamforming. By localizing the transmit beam in specific directions away from the receive path, the system provides strong signal strength in the intended direction while naturally reducing interference in other directions, eliminating the need for aggressive gain compensation that would increase interference.
Solution Approach 2:
The beamforming system dynamically changes parameters such as beam direction, width, and frequency characteristics based on channel conditions. By adjusting these parameters, the system optimizes signal strength for the intended receiver while simultaneously minimizing retransmission interference, achieving both goals through coordinated parameter control rather than simple gain adjustment.
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
The solution effectively reduces signal interference and enhances signal quality by dynamically controlling beamforming and gain adjustments, thereby improving the stability and efficiency of wireless communication.
Implementation Method 1
receiving, at a first antenna array of a wireless repeater, a signal via directional beamforming, retransmitting the signal via directional beamforming at a second antenna array of the wireless repeater
Implementation Method 2
A feedback path of the repeater may adjust a gain of an amplifier based on an output of the at least one PA
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A wireless repeater beamforms a receive signal, at a first antenna array. The repeater retransmits, via a second antenna array, a beamformed signal. The repeater may adjust the receive and/or transmit beam in order to avoid signal interference caused by the retransmission. The repeater may monitor an output of a power amplifier (PA) in a signal processing chain and adjust a gain to a PA driver to the PA and/or a gain to one or more low noise amplifiers (LNAs) in the signal processing chain in order to improve or maintain transmission stability in the repeater.