RSSI Detection Using Split Power Sensing During Bandwidth Switching
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Solution Overview
Problem
In microwave systems, the amplification control signal transitions during bandwidth switching, causing power instability at the analog-to-digital conversion unit and resulting in bit errors due to inadequate power detection methods.
Innovation Solution
The proposed RSSI detection apparatus and method separate power detection for RSSI calculation from amplification control, performing power detection directly on the digital signal stream before filtering, ensuring stable power delivery and preventing amplification control signal transients during bandwidth switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a filter with constant filtering bandwidth is used to filter the digital data stream, then the filtering process is simple and stable, but the power detection accuracy deteriorates during bandwidth switching because the detected power does not reflect the actual total power
Solution Approach 1:
The patent segments the power detection function into two independent parts: (1) a power detection module that detects power at a fixed position in the signal processing chain, and (2) an RSSI calculation unit that computes RSSI values for different bandwidths using pre-stored conversion relationships. This segmentation allows the detection module to remain simple while the calculation unit adapts to different bandwidths, resolving the contradiction between filtering simplicity and detection accuracy.
Solution Approach 2:
The patent changes the parameter of filtering bandwidth from constant to variable by storing multiple filtering bandwidth values (first filtering bandwidth, second filtering bandwidth, etc.) and selecting appropriate bandwidths based on the data stream bandwidth. This allows the system to maintain simple fixed-bandwidth filtering hardware while achieving accurate power detection across different bandwidths through parameter adaptation.
2Device complexity
If the filtering bandwidth is kept constant while data stream bandwidth changes, then the filter design is simplified, but the RSSI indication accuracy deteriorates because the detected power fluctuates during bandwidth switching
Solution Approach 1:
The patent performs preliminary actions by pre-storing the relationships between different filtering bandwidths and corresponding RSSI values in the RSSI calculation unit. Instead of dynamically adjusting filter bandwidth during operation, the system pre-computes and stores conversion factors that map fixed-bandwidth detection results to variable-bandwidth RSSI values, eliminating real-time filter reconfiguration while maintaining accuracy.
Solution Approach 2:
The patent introduces an intermediary element - the RSSI calculation unit with pre-stored bandwidth conversion relationships - that mediates between the fixed-bandwidth power detection module and the variable-bandwidth RSSI requirement. This intermediary translates the stable fixed-bandwidth detection results into accurate variable-bandwidth RSSI indications without requiring the filter itself to change bandwidth.
3Stability of the object's composition
If power detection is performed after filtering with constant bandwidth, then the detection process is stable, but bit errors occur during bandwidth switching due to amplification control signal transitions
Solution Approach 1:
The patent extracts the bandwidth adaptation function from the power detection process itself and places it in the RSSI calculation unit. The power detection module performs simple, stable detection with fixed bandwidth, while the extracted bandwidth adaptation logic uses pre-stored relationships to compute accurate RSSI values for different bandwidths, preventing amplification control signal transitions during bandwidth switching.
Data Source
AI summary
Embodiments of the present invention provide a detection method including receiving a modulated signal data stream from a microwave transmit end, performing amplification on the modulated signal data stream according to an amplification control signal, where the amplification control signal is used to indicate the number of amplification times for the amplification performed on the modulated signal data stream, performing analog-to-digital conversion on the amplified modulated signal data stream to obtain a first digital signal data stream; filtering the first digital signal data stream, performing power detection on the first digital signal data stream to obtain a first average power value, performing power detection on a filtered first digital signal data stream to obtain a second average power value, obtaining the amplification control signal according to the first average power value, and obtaining an RSSI value by calculation according to the amplification control signal and the second average power value.