RF Data Receiver With Auxiliary Wake-Up Detection for Lower Power
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Solution Overview
Problem
Existing RF receivers face significant power consumption issues due to frequent wake-up operations of the baseband digital part, particularly in the 2.4 GHz band, leading to reduced power efficiency.
Innovation Solution
A data receiving device and method that utilizes an auxiliary path with a continuous RF amplifier, power detector, and comparator to determine a wake-up signal by amplifying and comparing voltages, followed by demodulation and pattern checking, and then uses a main path for data signal demodulation only when necessary, reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RF receiver continuously monitors and demodulates signals to ensure reliable data reception, then the reliability of data reception is improved, but the power consumption increases significantly
Solution Approach 1:
The receiving device is divided into two separate paths: a first path for wake-up signal detection and a second path for data signal reception. This segmentation allows the device to process different types of signals through dedicated pathways, enabling the RF receiver to remain in a low-power state while still maintaining reliable reception by quickly detecting wake-up signals and only fully activating the data reception path when necessary.
2Measurement precision
If the RF receiver processes all received signals through full demodulation to ensure accurate signal detection, then the accuracy of signal detection is improved, but the power consumption increases due to continuous operation of demodulator components
Solution Approach 1:
The system performs preliminary detection of wake-up signals through the first path before committing to full data signal processing. By detecting the presence of a wake-up signal in advance, the system can prepare the data reception path and avoid unnecessary full demodulation when no wake-up signal is present, thus maintaining detection accuracy while reducing power consumption during idle periods.
Solution Approach 2:
The system applies partial action by processing only wake-up signals through the first path with full demodulation, while data signals are handled differently - only the second path processes data signals when wake-up is detected. This selective processing ensures accurate wake-up signal detection while avoiding excessive power consumption from continuously processing all signals through the full demodulation path.
3Productivity
If the receiver activates all processing components to handle potential data signals, then the productivity of data reception is improved, but the power consumption increases due to unnecessary processing
Solution Approach 1:
The system dynamically switches between different operational modes based on the detection of wake-up signals. When a wake-up signal is detected in the first path, the system activates the second path for data signal processing. When no wake-up signal is present, the system remains in a low-power state with only the first path active. This dynamic adaptation allows the receiver to maintain high productivity when data reception is needed while minimizing power consumption during idle periods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Efficiently determines wake-up signals and reduces power consumption by activating components only when needed, thereby enhancing power efficiency in data reception.
Implementation Method 1
determining a wake-up signal transmitted through an auxiliary path by amplifying a voltage of the wake-up signal
Implementation Method 2
comparing the amplified voltage of the wake-up signal with a first reference voltage
Implementation Method 3
demodulating the wake-up signal using a preset scheme and checking a pattern of the demodulated wake-up signal
Implementation Method 4
demodulating a data signal transmitted through a main path and comparing a voltage of the demodulated data signal with a second reference voltage
Data Source
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AI summary
A data receiving method, according to embodiments, may comprise the steps of: determining a wake-up signal transmitted through an auxiliary path, wherein the step of determining the wake-up signal comprises amplifying the voltage of the wake-up signal, comparing the amplified voltage of the wake-up signal with a first reference voltage, if the amplified voltage of the wake-up signal is greater than the first reference voltage, demodulating the wake-up signal in a preset manner, and checking the pattern of the demodulated wake-up signal; demodulating a data signal transmitted through a main path and comparing the voltage of the demodulated data signal with a second reference voltage; and if the voltage of the data signal is greater than the second reference voltage, decoding the data signal.