Low-Power Wake-Up Receiver Signal Processing
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Solution Overview
Problem
Existing low power wake-up receivers (LP-WUR) have low reception sensitivity and processing methods result in significant time/frequency deviations, affecting the reception of low-power signals.
Innovation Solution
A signal processing method and device that ensures reception of low-power signals by receiving synchronization and wake-up information through specific synchronization and wake-up signals, using synchronization rasters and receiving windows to improve accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the main radio is turned off to save energy, then power consumption is reduced, but the device cannot receive signals
Solution Approach 1:
The radio system is divided into two independent parts: the low-power wake-up receiver (LP-WUR) that remains active to detect wake-up signals, and the main radio (MR) that is turned off to save power. This segmentation allows the device to maintain minimal signal reception capability while achieving significant power savings.
Solution Approach 2:
The LP-WUR performs preliminary signal detection and synchronization before the main radio is activated. By detecting wake-up signals and achieving preliminary synchronization in advance, the system ensures that the main radio can be quickly activated without missing important signals.
2Use of energy by moving object
If the low power wake-up receiver is used to save power, then energy consumption is reduced, but receiving sensitivity is low
Solution Approach 1:
The LP-WUR performs preliminary synchronization and time/frequency offset estimation before main radio activation. This preliminary action allows the low-power receiver to compensate for deviations in advance, improving its effective sensitivity despite hardware limitations.
Solution Approach 2:
The LP-WUR acts as an intermediary between the low-power state and full signal reception. It detects wake-up signals and provides preliminary synchronization information that mediates the transition to main radio operation, bridging the sensitivity gap.
3Extent of automation
If the low power wake-up receiver processes signals, then wake-up functionality is enabled, but time and frequency deviations are large
Solution Approach 1:
The LP-WUR performs preliminary time and frequency offset estimation before the main radio is activated. This preliminary synchronization reduces the magnitude of deviations that the main radio must correct, improving overall time and frequency accuracy.
Solution Approach 2:
The synchronization process is divided into two stages: coarse synchronization by the LP-WUR to reduce large deviations, and fine synchronization by the main radio to achieve high precision. This segmentation of the synchronization function addresses both wake-up functionality and accuracy requirements.
Data Source
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AI summary
The present disclosure provides a signal processing method and device and a readable storage medium, and relates to the technical field of communications, which are used for ensuring reception of a low-power receiving signal and performance of receiving a normal signal after a device is awakened again. The method includes: in an extremely low power consumption state, receiving a first signal and/or a second signal sent by a network device; obtaining at least one of first synchronization information and first wake-up information according to the first signal and/or the second signal; receiving a wake-up signal according to at least one of the first synchronization information and the first wake-up information.