Receiver Idle-Mode Packet Detection With DC Offset Power Reduction
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Solution Overview
Problem
Communications devices, such as satellite receivers, experience high dynamic power consumption in idle mode due to transistor charging and discharging while determining whether received signals are data packets or noise, leading to inefficient power usage.
Innovation Solution
Adding a predefined direct current (DC) signal to the digital representation of received analog signals in idle mode to reduce fluctuation and dynamic power consumption, allowing the device to stay in idle mode until a data packet is detected, thereby minimizing unnecessary processing of noise signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the receiver continuously processes received signals in idle mode to determine whether they are data packets or noise, then detection accuracy is maintained, but dynamic power consumption increases due to transistor charging and discharging
Solution Approach 1:
The receiver implements periodic signal processing by evaluating signals at specific intervals rather than continuously. The processor determines whether to exit idle mode based on periodic assessments of signal characteristics, thereby reducing the frequency of transistor switching operations while maintaining adequate detection accuracy.
Solution Approach 2:
The receiver performs preliminary signal evaluation in idle mode by assessing basic signal characteristics before committing to full packet detection mode. This preliminary action includes checking signal strength and basic modulation characteristics to determine whether further processing is warranted, reducing unnecessary full-processing operations.
2Use of energy by moving object
If the receiver remains in idle mode to conserve power, then power consumption is reduced, but the ability to quickly detect and process data packets is compromised
Solution Approach 1:
The receiver performs preliminary assessments of signal characteristics while in idle mode, maintaining readiness to quickly transition to packet detection mode when signals indicate potential data packets. This preliminary monitoring enables faster response times compared to complete idle states while consuming less power than continuous processing.
Solution Approach 2:
The receiver dynamically adjusts its operational state based on received signal characteristics. When signals suggest potential data packets, the receiver transitions from idle mode to packet detection mode. This dynamic state adjustment optimizes the balance between power consumption and detection speed based on real-time conditions.
Data Source
AI summary
Techniques for improving the power consumption of a communications device are described. In an example, the communications device generates a first digital signal based at least in part on an analog signal. The communications device also determines a second digital signal that corresponds to a predefined direct current (DC) signal. Further, the communications device generates a third digital signal based at least in part on the first digital signal and the second digital signal and compares a power estimate of the third digital signal with a power threshold. The power threshold is defined based at least in part on the predefined DC signal. The communications device determines that the analog signal corresponds to a data packet based at least in part on an outcome of the comparing.