Mobile Signal Compensation Circuit With Threshold-Based Gain Control

Solution Overview

Problem

Mobile communications devices used in vehicles face signal attenuation due to coupling and line structures, leading to reduced transmission power, which existing amplifiers struggle to compensate for effectively, especially at varying distances from the base station, and can result in overcompensation or undercompensation issues.

Innovation Solution

A circuit arrangement with reduced detection sensitivity that amplifies transmission signals only after exceeding a higher threshold, providing attenuation instead of amplification at low signal levels, and using a low-pass response to prevent ping-pong effects, ensuring the mobile communications device transmits at the desired power levels without exceeding maximum or minimum signal limits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If amplifier circuits are used to compensate for signal attenuation in vehicle antennas, then transmission power is increased, but energy consumption increases and overcompensation occurs at close distances from base station

Engineering Contradiction:

Improvetransmission powerVSAvoidenergy consumption

Core Design Contradiction:

PowerVSUse of energy by moving object

Solution Approach 1:

The amplifier's gain is dynamically adjusted based on the detected signal level. When the signal level exceeds a first threshold, the amplifier activates with a first gain value; when it exceeds a second, lower threshold, the gain switches to a second value. This dynamic adaptation prevents overcompensation at close distances while maintaining adequate power at farther distances, optimizing energy consumption across varying signal conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the amplifier's gain parameter based on signal level conditions. By detecting whether the signal level exceeds specific thresholds and accordingly adjusting the gain between a first gain value and a second gain value, the system optimizes transmission power while minimizing energy consumption and preventing overcompensation.

Inventive Principle:

Principle #35Parameter changes

2Power

If amplifier circuits are used to compensate for signal attenuation, then transmission power is increased, but ping-pong effects occur causing network instability

Engineering Contradiction:

Improvetransmission powerVSAvoidnetwork stability

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The amplifier's gain is dynamically adjusted based on the detected signal level. When the signal level exceeds a first threshold, the amplifier activates with a first gain value; when it exceeds a second, lower threshold, the gain switches to a second value. This dynamic adaptation prevents overcompensation at close distances while maintaining adequate power at farther distances, optimizing energy consumption across varying signal conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the amplifier's gain parameter based on signal level conditions. By detecting whether the signal level exceeds specific thresholds and accordingly adjusting the gain between a first gain value and a second gain value, the system optimizes transmission power while minimizing energy consumption and preventing overcompensation.

Inventive Principle:

Principle #35Parameter changes

3Power

If amplifier circuits are used to compensate for signal attenuation, then transmission power is increased, but overcompensation occurs when mobile device is close to base station

Engineering Contradiction:

Improvetransmission powerVSAvoidsignal level precision

Core Design Contradiction:

PowerVSManufacturing precision

Solution Approach 1:

The amplifier's gain is dynamically adjusted based on the detected signal level. When the signal level exceeds a first threshold, the amplifier activates with a first gain value; when it exceeds a second, lower threshold, the gain switches to a second value. This dynamic adaptation prevents overcompensation at close distances while maintaining adequate power at farther distances, optimizing energy consumption across varying signal conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the amplifier's gain parameter based on signal level conditions. By detecting whether the signal level exceeds specific thresholds and accordingly adjusting the gain between a first gain value and a second gain value, the system optimizes transmission power while minimizing energy consumption and preventing overcompensation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10368326B2Circuit arrangement for compensating for signal attenuation during the transmission of signals from or to a mobile communications device, and associated method

Publication Date: 2019.07.30 KATHREIN AUTOMOTIVE GMBH

AI summary

A circuit arrangement for compensating for signal attenuation during the transmission of transmission signals of a mobile communications device includes at least one amplifier is switched out of the signal transmission path or is deenergized, or does not amplify, attenuate or forward the detected input signal, unless an input signal level is detected which is greater than or equal to the input signal detection level (SEP) or a trigger level (SAP) which is at most 10 dB higher than the same. Alternatively or in combination, the amplifier is operated at a variable amplification factor in an adjustment range (X1) which begins at an input signal detection level (SEP) or a trigger level (SAP) which is at most 10 dB higher than the same, and extends to cover higher signal levels than these, wherein, if the input signal detection level (SEP) or the trigger level (SAP) is reached or exceeded, the input signal is either non-amplified or is attenuated at an amplification factor≤1.