Wireless Communication Unit Power Control via Direct Demodulation Standby
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Solution Overview
Problem
Current wireless communication units face challenges in reducing power consumption, particularly in maintaining communication quality and battery life, due to the high sensitivity and complex configurations required for reception standby, which leads to inefficient power management and potential malfunctions when detecting carrier waves from unintended systems.
Innovation Solution
A wireless communication unit with a direct demodulation standby part that prestores an identification code, compares it with the code in incoming high-frequency signals, and controls power supply to the transmitting/receiving part only when a match is detected, using a simplified circuit without a local oscillator, thereby minimizing power consumption during standby.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving part is constantly operated to maintain reception standby, then communication quality is maintained, but power consumption increases
Solution Approach 1:
The receiving part is divided into two functional segments: a simplified direct demodulation standby part that operates continuously at low power for signal detection and identification code verification, and a full-featured main receiving part that activates only when a matching signal is detected. This segmentation allows the system to maintain communication readiness while dramatically reducing standby power consumption.
Solution Approach 2:
The system implements periodic activation of the main receiving part based on signal detection results. The direct demodulation standby part operates continuously to monitor for incoming signals, and triggers the power-intensive main receiving part only when a signal with a matching identification code is detected, creating a periodic on-demand operation pattern that reduces average power consumption.
2Use of energy by moving object
If a simplified circuit without local oscillator is used for standby reception, then power consumption is reduced, but measurement precision of signal detection may be compromised
Solution Approach 1:
Different levels of signal processing quality are applied to different functional requirements. The direct demodulation standby part uses a simplified circuit without a local oscillator, providing sufficient detection capability for identification code verification at low power. The main receiving part uses a complete superheterodyne architecture with local oscillator for high-precision signal processing when full communication functionality is required.
Solution Approach 2:
The direct demodulation standby part acts as an intermediary detection layer between the antenna and the main receiving part. It performs preliminary signal screening and identification code verification using minimal power, filtering out unnecessary signals before they reach the power-intensive main receiving part, thus maintaining overall system efficiency.
3Use of energy by moving object
If carrier wave detection is used to determine signal presence, then power consumption is reduced, but false detection from unintended systems occurs
Solution Approach 1:
The system uses identification codes as unique 'signatures' or 'colors' for different wireless communication systems. Instead of relying on generic carrier wave detection that cannot distinguish between systems, the direct demodulation standby part extracts and compares identification codes from detected signals, ensuring that only signals from the intended system trigger full reception, thereby eliminating false detections while maintaining low power consumption.
Data Source
AI summary
The present invention, which is aimed at providing a wireless communication unit which is operated by battery power and offers long battery life, power control method thereof and a wireless network which utilizes the wireless communication unit, includes: a direct demodulation standby part for prestoring an own unit identification code to compare the identification code included in the high-frequency signal with the own unit identification code; an intermittent power supply part for intermittently supplying power to the direct demodulation standby part; and a power control part for controlling the power supply to the transmitting/receiving part, wherein the direct demodulation standby part notifies the power control part and the intermittent power supply part, whether or not the identification code coincides with the own unit identification code after comparing the both, the power control part supplies power to the transmitting/receiving part upon receiving the notification from the direct demodulation standby part, indicating that the identification code coincides with the own unit identification code, and the intermittent power supply part intermittently supplies power to the direct demodulation standby part upon receiving the notification from the direct demodulation standby part indicating that the identification code does not coincide with the own unit identification code.