Signal Combiner Power Control via Cumulative Combining Mode
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Solution Overview
Problem
Existing signal combiners for multiplexing transmitters face challenges in efficiently adjusting transmission power to comply with regulatory limits and minimize losses, leading to increased system complexity and cost.
Innovation Solution
A signaling protocol that allows transmitters to determine the configuration of the combiner network, adjusting output power based on the cumulative combining mode indicated by downstream combiners, using the same cables for signal transmission and mode indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmitters use fixed high output power to compensate for combiner losses, then transmission reliability is improved, but regulatory compliance deteriorates and energy efficiency worsens
Solution Approach 1:
The transmitter output power is made dynamic rather than fixed. The transmitter adjusts its output power level based on real-time feedback about the combiner network configuration (cumulative combining mode). When more combiners are detected, the transmitter automatically reduces power to stay within regulatory limits; when fewer combiners are present, it increases power to maintain reliability. This dynamic adaptation resolves the contradiction between maintaining reliable transmission and complying with regulatory power limits.
Solution Approach 2:
A feedback mechanism is implemented where the transmitter receives information about the combiner network configuration (through detection of combining modes or explicit signaling) and uses this feedback to adjust its output power accordingly. This closed-loop control ensures that the transmitter operates at the optimal power level for the current system configuration, preventing both excessive power (which would violate regulations) and insufficient power (which would compromise reliability).
2Reliability
If transmitters use fixed high output power to ensure signal strength, then signal quality is improved, but power efficiency deteriorates and energy loss increases
Solution Approach 1:
The transmitter power output transitions from a static fixed value to a dynamic variable that adapts to system conditions. By detecting the cumulative combining mode and adjusting power levels accordingly, the system ensures that transmitters only use the necessary amount of power required to achieve adequate signal quality through the specific combiner configuration present, thereby eliminating wasted energy from excessive power transmission.
Solution Approach 2:
The power output parameter of the transmitter is changed dynamically based on the combiner network configuration. Instead of operating at a constant high power level, the transmitter modifies its output power parameter to match the actual signal requirements determined by the number and arrangement of combiners in the network, optimizing the balance between signal quality and energy efficiency.
3Measurement precision
If separate communication channels are added for power adjustment signaling, then control precision is improved, but device complexity increases
Solution Approach 1:
The existing RF signal transmission path is made multi-functional by enabling it to carry both the primary signal transmission and the secondary function of conveying combiner configuration information. The combiners utilize their inherent reflection characteristics to encode information about their cumulative combining mode, which is then detected by transmitters through the same RF path used for normal operation. This eliminates the need for separate dedicated communication channels while maintaining precise control capability.
Solution Approach 2:
Multiple functions are merged into a single communication path. The RF transmission medium simultaneously performs signal transmission and configuration information exchange. The combiner network configuration detection is integrated into the existing signal flow path, combining what would traditionally require separate channels into a unified system that reduces overall complexity while preserving control precision.
Data Source
AI summary
Aspects of the disclosure relate to use of signal combiners for multiplexing signals. A transmitter may adjust a transmission power of an output signal to compensate for transmission losses associated with the use of signal combiners. The adjustment may be based on a combining mode as indicated by a combiner. The combiner may indicate a combining mode as a voltage level at an output port of the transmitter. If operating in a cascaded mode, the combiner may determine and indicate a cumulative combining mode based on an operating mode/type of the combiner and an operating mode/type as indicated by a downstream combiner.