Diversity Receiver Power Management via Selective Clock Interruption
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Solution Overview
Problem
Existing diversity receiving devices face challenges in reducing power consumption without degrading reception performance, especially when there are differences in line quality between systems, leading to potential degradation of diversity gain due to increased power consumption from unselected systems.
Innovation Solution
A diversity receiving device that selectively interrupts power supply to unselected systems, employs time division processing for signal synthesis, and dynamically switches between selection and addition synthesis diversity based on signal intensity and quality, allowing for efficient power management without compromising reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all systems operate independently and continuously to ensure reception performance, then reception performance is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic power management by making the operation state of each system (operating or stopped) variable based on real-time reception quality assessment. The control unit dynamically adjusts which systems remain active versus which are stopped, creating a flexible, adaptive power consumption model that responds to changing signal conditions rather than maintaining fixed continuous operation of all systems.
Solution Approach 2:
The patent changes the operational parameter (power supply state) of systems based on measured reception quality parameters. When reception quality in a system degrades below a threshold, the system transitions from an operating state to a stopped state, effectively using parameter changes to balance power consumption against reception performance requirements.
2Reliability
If systems with degraded signal-to-noise ratio continue to operate, then diversity gain may be maintained, but power consumption increases and AFC circuit stability decreases
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors reception quality (including signal-to-noise ratio) of each system and uses this feedback to determine whether to maintain or stop that system. This closed-loop control ensures that systems with degraded quality that would consume power without contributing effectively to diversity gain are automatically stopped, while maintaining adequate diversity through remaining active systems.
Solution Approach 2:
The system dynamically adjusts the number and configuration of active systems based on real-time quality assessment. When one system degrades, the control unit can activate additional systems or redistribute load, creating a dynamic diversity maintenance strategy that adapts to changing conditions rather than relying on fixed continuous operation of all systems.
3Reliability
If multiple systems operate simultaneously to provide signal selection and addition synthesis, then reception performance is enhanced, but device complexity and power consumption increase
Solution Approach 1:
The patent segments the diversity reception function into independent, modular systems that can be individually controlled. Each system operates as a separate unit with its own reception quality assessment, allowing the control unit to selectively activate or deactivate specific segments (systems) based on their individual performance, thereby reducing the effective complexity of the overall device when not all systems are needed.
Solution Approach 2:
The control unit serves multiple functions: it assesses reception quality, determines optimal system configurations, manages power supply states, and coordinates synthesis operations. This multi-functional control architecture reduces overall device complexity by consolidating management functions rather than requiring separate dedicated control mechanisms for each subsystem.
Data Source
AI summary
A diversity receiving device includes a processing circuit in which receiving units, AFC and synchronizing units, and demodulating units for a plurality of systems are connected, received signal intensity detecting units 104 and 105 that detect the intensities of output signals of the respective receiving units so as to output reception intensity detection signals, a control unit that determines to select one system as a synthesis pattern of demodulation signals based on a predetermined judgment criterion according to the respective reception intensity detection signals or to select a plurality of systems so as to add demodulation signals and outputs a plurality of clock interruption control signals requesting the interruption of a clock supply to unselected systems and synthesis pattern selection signals designating a synthesis pattern of demodulation signals of the selected system, a plurality of clock supply units that interrupt the clock supply to the AFC and synchronizing units and the demodulating units of the unselected systems according to the clock interruption control signal, and a synthesizing unit that synthesizes demodulation signals of the selected system according to the synthesis pattern selection signals.