Downlink Pre-Amplifier Layout for Certified Modem Reception
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Solution Overview
Problem
Existing signal boosters and repeaters face challenges in improving wireless communication quality without violating modem certification and network integrity, particularly in areas with poor reception.
Innovation Solution
Incorporation of a pre-amplification system that amplifies downlink signals before they reach the modem, using low noise amplifiers and band pass filters, while maintaining compliance with regulatory standards and avoiding uplink signal amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal amplification is applied to improve wireless communication quality, then receiver sensitivity and data throughput are enhanced, but modem certification and network integrity may be violated
Solution Approach 1:
The patent segments the signal processing function into two distinct parts: a pre-amplifier located outside the modem that amplifies only the downlink signal, and the modem itself that remains unmodified. This segmentation allows signal amplification to be applied without violating modem certification, as the modem's internal signal path remains unchanged. The pre-amplifier handles the amplification function separately, thus improving wireless communication quality while preserving modem integrity.
Solution Approach 2:
The pre-amplifier acts as an intermediary component between the antenna and the modem. It processes the downlink signal before it enters the modem, providing signal amplification without requiring modifications to the modem itself. This intermediary approach enables the system to benefit from enhanced signal strength while maintaining compliance with certification requirements, as the modem operates within its certified parameters.
2Reliability
If downlink signal amplification is applied before the modem, then receiver sensitivity is improved, but system complexity increases due to additional components
Solution Approach 1:
The patent extracts the amplification function from the modem and places it in a separate pre-amplifier component. This extraction improves receiver sensitivity by providing dedicated signal amplification before the modem processes the signal. While this adds a component to the system, it keeps the modem itself simpler and unmodified, maintaining its certified design while still achieving the sensitivity improvement through the external pre-amplifier.
3Reliability
If full dual-directional amplification is applied to boost both uplink and downlink signals, then overall communication quality is improved, but network protection and modem certification are compromised
Solution Approach 1:
The patent applies amplification locally and selectively to only the downlink signal path, rather than applying full dual-directional amplification. The pre-amplifier is configured to process only the downlink signal from the antenna to the modem, leaving the uplink signal path unchanged. This local quality approach improves communication quality for the downlink where it is most needed while avoiding the harmful effects of uplink amplification that could violate network protection and modem certification.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances receiver sensitivity and data throughput without affecting modem certification or network protection, particularly beneficial in rural areas with weak cellular reception.
Implementation Method 1
The pre-amplifier can amplify the downlink signal to produce an amplified downlink signal
Implementation Method 2
amplifies downlink signals before they reach the modem, using low noise amplifiers
Implementation Method 3
using low noise amplifiers and band pass filters
Data Source
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AI summary
A pre-amplification system for a modem, the pre-amplification system, comprises an uplink-downlink signal path communicatively coupled between a first modem port of the modem and a first donor antenna port; and a downlink signal path communicatively coupled between a second modem port of the modem and a second donor antenna port, the downlink signal path including a pre-amplifier configured to amplify a received downlink cellular signal to produce an amplified downlink cellular signal to be directed to the second modem port.