Wireless Transceiver Transport Loss Compensation

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Solution Overview

Problem

Conventional wireless transceiver systems face inefficiencies due to unmeasured transport losses between the transceiver and the tower-mounted amplifier, leading to excessive output power and operation in non-linear regions, which lowers system efficiency.

Innovation Solution

Incorporating a transport loss detector with an RF power detector and controller to accurately measure and compensate for transport losses by adjusting the tower-mounted amplifier's gain, ensuring operation within legal power limits and optimizing signal transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the TMA amplifies the signal without accurate transport loss measurement, then the signal strength is increased, but the output power may exceed legal power limits and the TMA operates in non-linear region

Engineering Contradiction:

Improvesignal strengthVSAvoidoperation within legal power limits

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the transport loss detector continuously measures the actual transport loss between transceiver and TMA, and the controller adjusts the TMA gain based on this feedback to maintain operation within legal power limits while compensating for transport loss

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual or fixed gain adjustment mechanisms with an automated electronic control system that uses RF power detection and controller-based gain adjustment to dynamically compensate for transport loss and maintain optimal operation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Loss of energy

If the TMA operates in non-linear region to compensate for unmeasured transport loss, then the transport loss is compensated, but the system efficiency is lowered

Engineering Contradiction:

Improvetransport loss compensationVSAvoidsystem efficiency

Core Design Contradiction:

Loss of energyVSProductivity

Solution Approach 1:

The feedback mechanism enables precise measurement of transport loss and continuous adjustment of TMA gain to operate in the optimal linear region, maximizing system efficiency while still achieving complete transport loss compensation

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent dynamically changes the TMA gain parameter based on measured transport loss conditions, allowing the system to adapt to varying cable losses and maintain optimal operating point for maximum efficiency

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If a transport loss detector is added to the system, then the transport loss measurement precision is improved, but the device complexity increases

Engineering Contradiction:

Improvetransport loss measurementVSAvoidsystem structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the transport loss detector and controller functions into an integrated module that works closely with the existing TMA, reducing overall system complexity while achieving precise transport loss measurement and compensation

Inventive Principle:

Principle #5Merging (Combining)

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

The solution enables precise compensation of transport losses, preventing excessive output power and improving the overall efficiency of the wireless transceiver system by maintaining optimal operation within legal power limits.

Implementation Method 1

The first RF power detector detects the transmission state of the transceiver, and detects the second signal power

Methodology Applied

Scientific EffectRF power detection:

Implementation Method 2

The TMA, connected to the transceiver via a cable, receives the second signal from the transceiver, and amplifies the second signal

Methodology Applied

Scientific EffectSignal amplification:

Data Source

PatentUS7664468B2Wireless transceiver system

Publication Date: 2010.02.16 HON HAI PRECISION INDUSTRY CO LTD

AI summary

A wireless transceiver system, for compensating a transport loss, includes an antenna (300), a transceiver (100), a tower mounted amplifier (TMA) (200), and a transport loss detector (400). The transceiver transmits a first signal at a transmit power. The first signal is changed into a second signal after the cable attenuation from the transceiver. The TMA, connected to the transceiver via a cable, receives the second signal and amplifies the second signal. The transport loss detector, connected between the TMA and the transceiver, detects a transmission state of the transceiver, and calculates a transport loss between the transceiver and the TMA. The TMA transmits signals to the antenna or receives signals from the antenna according to the detected result of the transport loss detector, and compensates the transport loss according to the calculated result of the transport loss detector.