Combiner Duplexer Signal Routing for Uplink Sensitivity
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Solution Overview
Problem
Current wireless communication systems face reduced uplink sensitivity and network performance due to the insertion loss of 3-dB bridges used in combining same-band modules, which affects both transmit and receive signals.
Innovation Solution
A combiner system comprising a first duplexer, a second duplexer, and a 3-dB bridge is used, where the receive signal bypasses the 3-dB bridge, reducing insertion loss impact on uplink sensitivity and improving network performance by only passing through two duplexers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a 3-dB bridge is used to combine two same-band modules, then the modules can share an antenna and increase carrier resources, but the insertion loss of the bridge degrades uplink sensitivity by 3 dB to 4 dB
Solution Approach 1:
The patent divides the signal path into two separate segments: one for transmit signals (through the 3-dB bridge) and one for receive signals (bypassing the bridge). This segmentation allows the receive path to avoid insertion loss while the transmit path maintains combining functionality, thus resolving the contradiction between resource consolidation and sensitivity preservation.
Solution Approach 2:
The patent extracts the receive signal path from the 3-dB bridge combination, allowing it to bypass the bridge entirely. This extraction eliminates the harmful insertion loss effect on receive signals while maintaining the bridge's necessary function for transmit signal combining, thereby improving uplink sensitivity without sacrificing carrier resource consolidation.
2Ease of manufacture
If both transmit and receive signals pass through the 3-dB bridge, then the combining function is achieved, but the insertion loss affects both signal directions
Solution Approach 1:
The patent applies different signal routing configurations to different parts of the system: transmit signals route through the 3-dB bridge to utilize combining functionality, while receive signals route directly through duplexers to minimize loss. This local differentiation of signal paths resolves the contradiction by optimizing each path for its specific function.
Solution Approach 2:
The patent introduces a switching mechanism or routing structure that acts as an intermediary to direct receive signals around the 3-dB bridge. This intermediary element enables the system to maintain the bridge's combining function for transmit signals while protecting receive signals from insertion loss, effectively mediating between the two conflicting requirements.
Data Source
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AI summary
Embodiments of the present invention disclose a combiner, a base station, a signal combining system, and a signal transmission method, where the combiner includes a first duplexer, a second duplexer, and a three-decibel bridge; an ANT end of the first duplexer is connected to an antenna, an Rx end of the first duplexer is connected to an Rx end of the second duplexer, in order to input, to a base station, a signal received from the antenna, and a Tx end of the first duplexer is connected to an output end of the three-decibel bridge, in order to output, to the antenna, a combined signal output from the three-decibel bridge; and an ANT end of the second duplexer is connected to the base station, a first input end of the three-decibel bridge is connected to a Tx end of the second duplexer, in order to receive a signal that is sent by the second duplexer and that is received from the base station, and a second input end of the three-decibel bridge is connected to the base station, in order to receive a signal sent by the base station. According to the embodiments of the present invention, impact on uplink sensitivity can be reduced and network performance can be improved.