Wideband RFIC AGC Module for Multi-Standard Amplifier Gain Control
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Solution Overview
Problem
Traditional wireless communication systems face challenges in providing flexible automatic gain control (AGC) at the RF front-end for multi-standard and multi-band transceivers, as existing solutions burden the baseband digital signal processor (DSP) with complex gain control across amplifiers with varying characteristics and different performance requirements across wireless standards.
Innovation Solution
A standalone AGC module that receives input from the DSP, collects amplifier parameters, and generates a gain profile based on the desired performance requirements and characteristics of each amplifier, outputting control signals to adjust the gain of individual amplifiers, thereby relieving the DSP from direct gain control and optimizing AGC for the active standard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the baseband DSP directly controls gain of multiple amplifiers for multi-standard support, then gain control flexibility is improved, but computational complexity and processing burden increase
Solution Approach 1:
The patent segments the AGC functionality into a dedicated hardware module separate from the baseband DSP. This module independently handles gain control for multiple amplifiers, dividing the complex computational task from the DSP and reducing its processing burden while maintaining multi-standard adaptability.
Solution Approach 2:
The patent introduces an intermediate AGC control module that acts as a mediator between the baseband DSP and the amplifiers. This intermediary handles the complex gain control computations, shielding the DSP from direct involvement in multi-standard gain management while preserving flexibility.
2Adaptability or versatility
If multiple amplifiers are used to cover wideband frequency ranges, then frequency coverage is improved, but gain optimization across different standards becomes more difficult
Solution Approach 1:
The patent implements local quality by allowing each amplifier to have independently optimized gain control tailored to its specific characteristics and the requirements of different wireless standards. The AGC module generates separate control signals for each amplifier based on collected parameters, ensuring precise gain optimization for each component.
Solution Approach 2:
The patent dynamically changes gain parameters for each amplifier based on the active wireless standard and signal conditions. The AGC module collects amplifier parameters and adjusts gain settings in real-time, enabling precise optimization across different standards while maintaining wideband coverage.
3Device complexity
If AGC control is centralized in the baseband DSP, then system integration is simplified, but power consumption and processing time increase
Solution Approach 1:
The patent extracts the AGC control functionality from the baseband DSP and places it in a dedicated hardware module. This separation reduces the computational burden and power consumption of the DSP while maintaining system integration, as the AGC module communicates with the DSP through standardized interfaces.
Solution Approach 2:
The AGC module operates autonomously, collecting amplifier parameters and generating control signals without requiring continuous DSP intervention. This self-service capability reduces processing time and power consumption while maintaining effective gain control across multiple amplifiers and standards.
Data Source
AI summary
One embodiment of the present invention provides an automatic gain control (AGC) module for a wireless communication system that includes a plurality of amplifiers. The AGC module includes a receiving mechanism configured to receive an input that indicates a total amount of gain adjustment; a collecting mechanism configured to collect a number of parameters associated with the amplifiers; a determining mechanism configured to determine a desired performance requirement; a gain-control engine configured to generate a gain profile for the amplifiers based on the collected parameters, the total amount of gain, and the desired performance requirement; and an output mechanism configured to output a plurality of control signals based on the generated gain profile, wherein a respective control signal independently controls gain of a corresponding amplifier, thereby enabling the wireless communication system to achieve the total amount of gain adjustment while meeting the desired performance requirement.