Distributed Antenna Host Unit with Optical Signal Conversion
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Solution Overview
Problem
Distributed antenna systems face challenges in indoor environments due to shadow areas caused by obstructions, which hinder wireless signal transmission and reception, especially with the increasing demand for wireless data traffic from mobile devices.
Innovation Solution
A distributed antenna system comprising a host unit and remote radio head with digital and analog optical transceivers, signal processors, and combiners to convert and manage signals, ensuring efficient transmission and reception of wireless data by adjusting signal levels and combining synchronization, control, and management signals for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If one antenna covers a relatively wide area, then the number of antennas can be reduced, but shadow areas increase causing communication interruption
Solution Approach 1:
The patent divides a single wide-coverage antenna into multiple distributed antennas with smaller coverage areas. Each distributed antenna is positioned to cover specific zones, eliminating shadow areas caused by obstacles while collectively providing comprehensive indoor coverage. This segmentation resolves the contradiction by trading individual antenna coverage area for improved communication reliability through distributed positioning.
2Reliability
If multiple distributed antennas are deployed to minimize shadow areas, then communication reliability improves, but system complexity increases
Solution Approach 1:
The patent combines multiple distributed antennas into a unified distributed antenna system managed by a central controller. The controller coordinates signal distribution, processing, and resource allocation across all antennas, allowing the system to achieve high communication reliability through distributed deployment while managing complexity through centralized control architecture.
Solution Approach 2:
The distributed antennas are designed with multi-functional capabilities, serving both as transmission and reception elements while also providing coverage for multiple frequency bands and service types. This universality reduces the need for separate specialized components, thereby managing system complexity while maintaining high reliability through versatile distributed deployment.
3Productivity
If digital optical transceivers and signal processors are added to support large data traffic, then data transmission capacity increases, but device complexity and cost increase
Solution Approach 1:
The patent replaces traditional electrical signal transmission with optical signal transmission using digital optical transceivers. This substitution enables high-capacity data transmission through optical fibers while reducing electromagnetic interference and signal degradation. The digital signal processing components efficiently manage the optical-electrical conversion and signal conditioning, achieving high productivity while controlling complexity through standardized optical communication protocols.
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 system effectively minimizes shadow areas and supports a large volume of wireless data transmission with reduced delay and cost, enhancing indoor wireless communication services.
Implementation Method 1
a digital optical transceiver configured to convert a digital baseband optical signal received from the baseband unit into a digital electric signal
Implementation Method 2
a digital-to-analog converter configured to convert the deframed digital electric signal into an analog electric signal
Implementation Method 3
an analog optical transceiver configured to convert, into an analog optical signal, the analog electric signal combined with at least one of the frequency synchronization signal, the TDD switching control signal, or the monitoring and management signal
Data Source
AI summary
A remote radio head disposed between a baseband unit and a host unit. The remote radio head may transmit and receive a digital optical signal to the baseband unit, transmit and receive an analog optical signal to the host unit, and convert the digital optical signal and the analog optical signal, a frequency of the analog optical signal transmitted and received by the remote radio head and the host unit may be an intermediate frequency of a baseband, the host unit may be disposed between the remote radio head and a radio unit, the host unit and the radio unit may transmit and receive the analog optical signal, and the frequency of the analog optical signal transmitted and received by the host unit and the radio unit may be the intermediate frequency with a baseband signal.