Variable Equalizer Gain Compensation for Wideband Signal Flatness
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Solution Overview
Problem
Wireless communication systems, particularly satellite-based systems, face challenges with frequency-dependent gain issues that lead to bandwidth limitations and latency, resulting in suboptimal performance and high costs due to the need for individual hardware installation and alignment in remote areas.
Innovation Solution
The implementation of variable frequency-dependent gain compensation circuits and methods that adjust frequency-dependent gains in transceivers and signal processing devices to achieve a flatter gain profile, reducing power consumption and improving dynamic range, allowing for better signal processing and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If frequency-dependent gain compensation is not applied, then the system maintains simple circuitry, but the dynamic range and signal processing performance deteriorate
Solution Approach 1:
The patent applies parameter changes by adjusting the gain of amplifier stages at different frequencies to compensate for frequency-dependent gain variations. The control circuit modifies amplifier parameters (gain settings) based on detected frequency characteristics, thereby flattening the overall frequency response and improving signal processing performance across the bandwidth.
2Productivity
If bandwidth is increased to improve data capacity and speed, then communication performance improves, but frequency-dependent gain issues become more severe
Solution Approach 1:
The patent implements feedback by using a control circuit that detects the frequency-dependent gain characteristics of the transmitter or receiver and automatically adjusts amplifier gain settings to compensate. This closed-loop feedback mechanism maintains stable frequency response across wide bandwidths, enabling high data capacity and speed without sacrificing gain stability.
3Reliability
If individual hardware installation and alignment is performed for each location, then communication reliability is improved, but installation cost and time increase significantly
Solution Approach 1:
The patent applies self-service by implementing automatic frequency-dependent gain compensation that requires no manual hardware adjustment or alignment. The control circuit autonomously detects and corrects gain variations, eliminating the need for technician intervention and complex manual alignment procedures at each installation location.
4Reliability
If amplifier gain is increased to improve signal detection, then signal-to-noise ratio improves, but distortion from adjacent carriers increases
Solution Approach 1:
The patent applies local quality by adjusting amplifier gain settings specifically for different frequency regions rather than applying uniform gain across the entire bandwidth. This selective gain adjustment improves signal detection in weak signal regions while maintaining appropriate gain levels in other regions to minimize adjacent carrier distortion.
Data Source
AI summary
Systems, devices, and methods for determining and establishing frequency-dependent gain compensation in wide bandwidth communication systems are disclosed. Variable frequency-dependent gain compensation circuits, or variable equalizers, have settings that configure them to establish discrete frequency-dependent gain compensation. The frequency-dependent gain compensation can include various types and levels of gain slope and/or ripple. The settings of the variable equalizers can be set by control signals established a control circuit in response to signals from an external computer. The variable equalizers are coupled to other circuits or devices and the frequency-dependent gain of the combined circuit are measured. The settings of the variable equalizer are then changed to establish an optimal frequency-dependent gain profile or frequency-dependent gain that is closest to a predetermined frequency-dependent target gain profile. The settings can then be saved in a memory or register.