Digital Distributed Antenna Signal Conditioning for LTE Interference
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Solution Overview
Problem
Existing digital distributed antenna systems face challenges in handling the increasing complexity of cellular communication protocols, such as LTE, due to limitations in signal processing and quality enhancement, particularly in geographically diverse areas with interference issues.
Innovation Solution
Incorporating localized signal conditioning and control modules in remote antenna units to digitally demodulate, process, and re-modulate RF signals, allowing for enhanced signal quality and interference management, including data stream extraction and optimization, within the digital domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional digital distributed antenna systems are used to cover geographically diverse areas, then coverage area is expanded, but signal quality deteriorates due to interference and protocol complexity
Solution Approach 1:
The patent segments the centralized signal processing function into distributed remote antenna units (RAUs), each capable of independent signal processing. This segmentation allows localized adaptation to different geographic and interference conditions while maintaining broad coverage through the distributed network of RAUs.
Solution Approach 2:
The patent implements localized signal conditioning and control at each remote antenna unit, enabling different parts of the distributed antenna system to have optimized signal processing characteristics tailored to local conditions. This local quality approach improves signal quality in geographically diverse areas by adapting to local interference patterns and protocol requirements.
2Device complexity
If centralized signal processing is used in digital distributed antenna systems, then system complexity is reduced, but signal quality and interference management capability deteriorate
Solution Approach 1:
The patent divides the signal processing functionality between the centralized host and distributed remote antenna units. The host provides centralized coordination while RAUs perform localized signal conditioning, demodulation, and re-modulation. This segmentation balances system complexity management with enhanced signal quality through distributed processing.
Solution Approach 2:
The patent introduces localized signal conditioning modules as intermediaries between the centralized host and the wireless environment. These modules act as mediators that perform protocol-specific processing and interference management locally, bridging the gap between centralized control and distributed deployment.
3Adaptability or versatility
If advanced cellular protocols like LTE are implemented, then communication capability is improved, but processing complexity and signal quality maintenance become more difficult
Solution Approach 1:
The patent implements protocol-specific signal processing capabilities at each remote antenna unit, allowing localized adaptation to advanced cellular protocols like LTE. Each RAU can be configured with appropriate modulation, demodulation, and signal conditioning functions tailored to the deployed protocol, managing processing complexity through distributed specialization.
Solution Approach 2:
The patent enables dynamic adjustment of signal processing parameters at remote antenna units to accommodate different cellular protocols. By changing modulation schemes, frequency offsets, and signal conditioning parameters locally at each RAU, the system adapts to advanced protocols like LTE while maintaining manageable processing complexity through distributed parameter optimization.
Data Source
AI summary
Digital distributed antenna systems and methods for advanced cellular communication protocols are provided. In one embodiment, a digital distributed antenna system comprises: a host unit; a plurality of remote antenna units each communicatively coupled to the host unit, wherein a first digitized RF signal comprising a plurality of data streams is communicated between the host unit and a first remote antenna unit of the plurality of remote antenna units; and a signal conditioning and control module that converts an original version of at least a first data stream to baseband data, wherein the signal conditioning and control module replaces the original version of the first data stream in the first digitized RF signal with a modified version of the first data stream by modifying data derived from the baseband data.