Receiver Gain Compensation for Stable Digital Signal Amplitude
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Solution Overview
Problem
Wireless communications devices face data reception errors due to unexpected signal changes caused by amplification gain adjustments, which can corrupt data frames, especially in varying channel conditions.
Innovation Solution
A method and system for gain control in communications devices that detect changes in amplification gain and compensate by manipulating the amplitude of digital signals converted from analog signals, including freezing, measuring, and removing amplitude gaps during specific time windows to prevent decoding errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If amplification gain is adjusted to adapt to varying channel conditions, then communication reliability is improved, but signal amplitude stability deteriorates causing data reception errors
Solution Approach 1:
The patent applies preliminary action by detecting amplification gain changes and freezing the digital signal amplitude before data frame reception begins. The gain change detection and amplitude freezing occur in advance during a time window prior to the actual data reception, preventing amplitude instability from corrupting the data frame. This proactive approach ensures that when data reception starts, the signal amplitude is already stabilized regardless of recent gain adjustments.
Solution Approach 2:
The patent introduces an intermediary mechanism (amplitude freezing control) between the amplification gain adjustment and the digital signal processing. When gain changes are detected, the system inserts a freezing period where the digital signal amplitude is held constant, acting as a buffer that decouples the direct relationship between gain changes and signal amplitude variations. This intermediary step prevents gain adjustments from directly causing amplitude instability in the received data.
2Power
If amplification gain configuration is changed to handle long distance communications, then signal strength is improved, but data frame corruption increases
Solution Approach 1:
The system performs preliminary detection of amplification gain changes and implements amplitude freezing before data frame reception. By detecting gain configuration changes in advance and freezing the digital signal amplitude during a predetermined time window prior to data reception, the system ensures that signal strength adjustments do not corrupt incoming data frames. The amplitude stabilization occurs proactively, separating the gain adjustment phase from the data reception phase.
3Adaptability or versatility
If amplification gain is modified to adapt to channel conditions, then communication adaptability is improved, but unexpected signal changes occur
Solution Approach 1:
The patent implements preliminary detection of amplification gain changes followed by amplitude freezing before data frame reception. This two-stage preliminary action allows the system to adapt to channel conditions through gain adjustments while simultaneously preparing the digital signal by freezing its amplitude in advance. The separation of gain adaptation and data reception through the freezing mechanism prevents unexpected signal changes during actual communication.
Solution Approach 2:
The amplitude freezing mechanism serves as an intermediary between gain adaptation and signal processing. When gain changes are detected to adapt to channel conditions, the freezing control inserts a stabilization period that mediates the transition. This intermediary step ensures that gain adaptations for better channel compatibility do not directly translate to unexpected amplitude variations in the received digital signal.
Data Source
AI summary
Embodiments of methods and systems for gain control in a communications device are described. In an embodiment, a method for gain control in a communications device involves detecting a change in an amplification gain that is applied to an analog signal in the communications device and compensating for the change in the amplification gain by manipulating an amplitude of a digital signal that is converted from the analog signal. Other embodiments are also described.