Main Unit Delay Compensation for Distributed Antenna Signal Quality
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Solution Overview
Problem
In distributed antenna systems, ensuring signal quality when combining signals at headend nodes, hub nodes, or remote nodes is challenging due to time delay issues, which existing technologies fail to adequately compensate for.
Innovation Solution
A main unit is introduced that includes a first receiver for receiving a first group of base station signals, a second receiver for receiving a second group of base station signals, a signal combiner for combining these signals, and a delay compensator to compensate for time delay between main units before signal combination, ensuring synchronized signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal combination is performed at headend nodes, hub nodes, or remote nodes without time delay compensation, then signal combination functionality is achieved, but signal quality deteriorates due to time delay issues
Solution Approach 1:
The patent applies preliminary action by performing time delay compensation before signal combination at the main unit. The delay compensator pre-adjusts the timing of signals from multiple base stations before they are combined, ensuring that signals are synchronized and properly aligned when combined, thereby maintaining signal quality without requiring compensation at downstream nodes.
2Reliability
If time delay compensation is performed only at remote nodes, then remote node operation is simplified, but signal quality cannot be guaranteed when signal combination is required at headend or hub nodes
Solution Approach 1:
The patent merges the time delay compensation function with the signal combination function at the main unit. By integrating the delay compensator and signal combiner in a single location, the system achieves both signal combination and time delay compensation simultaneously, eliminating the need for separate compensation mechanisms at multiple distributed nodes and simplifying the overall system architecture.
3Device complexity
If signals from multiple base stations are combined without pre-compensation, then system complexity is reduced, but signal quality and reliability deteriorate
Solution Approach 1:
The patent introduces an intermediary delay compensator between the signal receivers and the signal combiner at the main unit. This intermediary component adjusts the timing of incoming signals from multiple base stations before they reach the combiner, ensuring proper synchronization without adding complex distributed compensation systems across multiple nodes.
Data Source
AI summary
There is provided a main unit and a distributed antenna system including the same. The main unit for constituting a distributed antenna system that receives a base station signal from at least one base station, transmits the base station signal to at least one user terminal, and includes a plurality of main units, the main unit includes: a first receiver for receiving a first group of base station signals; a second receiver for receiving a second group of base station signals from another main unit; a signal combiner for combining the first and second groups of base station signals; and a delay compensator for compensating for time delay corresponding to a path between the main unit and the other main unit with respect to the first group of base station signals before combining the first and second groups of base station signals.