Distributed Antenna Uplink Integrity Detection for Noise Equalization
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Solution Overview
Problem
Distributed antenna systems face challenges in combining uplink signals due to undesirable signal components like noise, which can corrupt data and reduce signal coverage, as remote antenna units contribute varying amounts of noise to the combined signal, affecting the integrity of the uplink path.
Innovation Solution
An uplink integrity detection sub-system is introduced, comprising a test signal generator, power detector, and distributed antenna system controller, which measures noise figures and adjusts the gain of uplink paths to minimize the impact of excessive noise contributions from remote antenna units, ensuring equalized noise contributions across all units and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If uplink signals from multiple remote antenna units are combined at the master unit, then signal coverage is extended, but noise and interfering signals from remote antenna units corrupt the combined signal and reduce signal integrity
Solution Approach 1:
The patent applies local quality by making each remote antenna unit individually measurable and controllable. The system measures the noise figure of each remote antenna unit separately and adjusts the gain of each uplink path independently. This allows the master unit to equalize noise contributions from different remote antenna units, maintaining signal integrity while preserving extended coverage.
Solution Approach 2:
The patent changes the gain parameter of uplink paths based on measured noise figures. The master unit adjusts the gain of each remote antenna unit's uplink path to equalize their noise contributions at the combiner input. This parameter adjustment resolves the contradiction by allowing all remote antenna units to contribute usefully without overwhelming the combined signal with excessive noise.
2Area of stationary object
If remote antenna units contribute different amounts of noise to the combined uplink signal, then signal coverage is maintained across different areas, but the varying noise levels cause corruption of data and reduce overall signal quality
Solution Approach 1:
The patent implements feedback by measuring the noise figure of each remote antenna unit and using this measurement to adjust the gain of its uplink path. The master unit continuously monitors and adjusts gains based on actual noise performance, creating a closed-loop system that equalizes noise contributions and prevents noise corruption while maintaining comprehensive coverage.
Solution Approach 2:
The patent applies dynamics by making the gain of each uplink path adjustable and adaptive. Instead of fixed gains, the system dynamically adjusts the gain of each remote antenna unit's uplink path based on its measured noise figure. This dynamic adjustment allows the system to optimize signal quality across varying coverage areas while preventing noise corruption.
3Reliability
If the gain of uplink paths is adjusted to equalize noise contributions, then signal integrity is improved, but system complexity increases due to the need for measurement and control mechanisms
Solution Approach 1:
The patent applies segmentation by dividing the noise figure measurement and gain control functions into individual remote antenna units. Each remote antenna unit has its own noise figure measurement capability and gain control, allowing independent adjustment. This segmentation simplifies the overall system architecture while achieving the goal of equalized noise contributions and improved signal integrity.
Solution Approach 2:
The patent implements self-service by enabling each remote antenna unit to measure its own noise figure and have its gain automatically adjusted by the master unit based on this measurement. The system uses the remote antenna units' own operational characteristics to determine the necessary adjustments, reducing the need for external calibration equipment or complex centralized control mechanisms.
Data Source
AI summary
Aspects and features are directed to an uplink integrity detection sub-system. In one aspect, a distributed antenna system is provided that includes a remote antenna unit that communicates with wireless devices in a coverage area, additional remote antenna units that communicate with wireless devices in additional coverage areas, and a unit that communicates with the remote antenna unit and the additional remote antenna units. The unit includes a distributed antenna system controller. The distributed antenna system controller can determine that an undesirable signal component having a power level exceeding a threshold power is communicated via an uplink path from the remote antenna unit. The distributed antenna system controller can also minimize an impact of the undesirable signal component on the additional coverage areas of the additional remote antenna units. Minimizing the impact can include modifying the gain of the uplink path over which the undesirable signal component is communicated.