Dual-Path Receiver Amplifier Layout for DSA Insertion Loss
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Solution Overview
Problem
Conventional dual-path receivers face challenges due to high insertion loss in Digital Step Attenuators (DSA) and Power Dividers (PD), which deteriorate noise coefficients and gain coefficients, increasing design complexity and performance requirements.
Innovation Solution
An amplifying device with two receiving paths, one for pre-amplified and attenuated signals and another for non-pre-amplified signals, integrated with a digital control module to select the appropriate path based on signal requirements, reducing the impact of insertion loss and incorporating SiGe technology for improved reliability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Digital Step Attenuator (DSA) is added at the input port to support TA application, then the receiver can handle different signal ranges, but the insertion loss of DSA deteriorates noise coefficients and gain coefficients
Solution Approach 1:
The receiver is divided into two separate paths: a first path for TA application with pre-amplification before DSA, and a second path for non-TA application without pre-amplification. This segmentation allows each path to be optimized independently, reducing the impact of DSA insertion loss on overall receiver performance.
Solution Approach 2:
A pre-amplifier is placed before the DSA in the first path to amplify the signal before attenuation. This preliminary amplification compensates for the insertion loss of the DSA, maintaining better noise coefficients and gain coefficients while still supporting TA application.
2Adaptability or versatility
If multiple modules are added to support various applications simultaneously, then the receiver can support Tower Amplification, interlink connection, and main-diversity dual-path application, but the structure of the receiver becomes complex
Solution Approach 1:
The receiver design makes the first path applicable to multiple scenarios including TA application, interlink connection, and main-diversity dual-path application. By optimizing the first path to handle various applications, the need for separate dedicated modules is reduced, simplifying the overall structure while maintaining versatility.
Solution Approach 2:
The patent combines multiple functions into the first path, including TA support, interlink connection capability, and main-diversity dual-path operation. This merging of functions into a unified path structure reduces the number of separate modules needed, thereby simplifying the receiver structure while maintaining support for various applications.
Data Source
AI summary
An amplifying device and a signal processing method based on an amplifying device are provided, capable of reducing performance requirements of modules and reducing design difficulty of the modules. The amplifying device includes at least one amplifying module, including two receiving paths, in which a first receiving path is configured to attenuate and amplify an input signal after the input signal is pre-amplified, and a second receiving path is configured to amplify the input signal when the input signal is not pre-amplified. The signal processing method based on the amplifying device is further provided. The amplifying device and the signal processing method may be applied in a communication network system.