RSSI Detection Using Dual Power Paths for Stable Bandwidth Switching
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Solution Overview
Problem
In existing RSSI detection methods, amplification control signals transition during bandwidth switching, causing power instability at the analog-to-digital conversion unit and resulting in bit errors.
Innovation Solution
An RSSI detection apparatus and method that separates power detection for RSSI calculation from amplification control, performing power detection directly on the digital signal before filtering, ensuring stable power input even during bandwidth switching by using an amplification unit, analog-to-digital conversion unit, filtering unit, power detection units, and an RSSI calculation unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power detection is performed after filtering in existing RSSI detection methods, then filtering removes unnecessary frequency components, but amplification control signals transition during bandwidth switching causing power instability and bit errors
Solution Approach 1:
The patent segments the power detection function into two separate detection paths: one for RSSI calculation and one for amplification control. The first power detection unit detects power for RSSI calculation, while the second power detection unit detects power for amplification control, allowing independent optimization of each function without interference during bandwidth switching
Solution Approach 2:
The patent introduces an intermediary calculation process where the RSSI value is derived from the first power detection result combined with amplification control signal information, rather than directly from the second power detection result. This intermediary step decouples the RSSI measurement from the amplification control transitions
2Adaptability or versatility
If bandwidth switching is performed to adapt to rapid fading, then system adaptability improves, but amplification control signal transitions cause power fluctuations at the ADC
Solution Approach 1:
The patent separates power detection into two independent units with different functions. The first power detection unit operates independently for RSSI measurement and is not affected by amplification control signal changes during bandwidth switching, while the second unit handles amplification control
Solution Approach 2:
Instead of detecting power after amplification control (which causes instability during bandwidth switching), the patent detects power before amplification control effects are applied, and uses this stable detection result to calculate RSSI, inverting the traditional detection sequence
3Measurement precision
If power detection is performed on filtered signal in existing methods, then unnecessary frequency components are removed, but RSSI accuracy and realtimeness are affected during bandwidth switching
Solution Approach 1:
The patent creates separate detection paths that operate independently. The first power detection unit provides real-time power measurement for RSSI calculation without being constrained by filtering operations, ensuring both accuracy and realtimeness
Solution Approach 2:
The patent performs power detection before the signal undergoes amplification control adjustments during bandwidth switching. This preliminary detection captures the true signal power state before control signal transitions affect the power level, enabling accurate and timely RSSI measurement
Data Source
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AI summary
Embodiments of the present invention provide a detection apparatus and a detection method for a received signal strength indicator. The method includes: receiving a modulated signal data stream from a microwave transmit end, and 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. In the embodiments of the present invention, power detection is performed on all bandwidth of the first digital signal data stream, thereby avoiding a transition of the amplification control signal.