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Photoelectric hybrid single-frequency network broadcasting method and system

A technology of photoelectric hybrid and broadcasting system, which is applied in the field of communication to achieve the effect of saving frequency resources, realizing seamless connection and improving spectrum utilization

Inactive Publication Date: 2019-10-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the demand for indoor signal transmission is much greater than that of the outdoor environment. However, it is difficult for a wide-area coverage radio system to achieve high-quality coverage of the indoor environment.

Method used

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  • Photoelectric hybrid single-frequency network broadcasting method and system
  • Photoelectric hybrid single-frequency network broadcasting method and system
  • Photoelectric hybrid single-frequency network broadcasting method and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0058] This embodiment gives an application in a downlink communication system oriented to broadband digital terrestrial broadcasting. The system requires four channels of downlink standard-definition digital TV broadcasting services within a given bandwidth, and the receiver only receives radio signals or visible light signals sent by a certain transmitter. The method flow and transfer modes involved are detailed below:

[0059] The control center simultaneously sends data streams and control signals to the radio transmitter and the visible light transmitter, and uses a single frequency network adapter to ensure synchronization with the transmitter.

[0060] The above-mentioned transmission services require four-channel standard-definition digital TV broadcast service transmission, and each signal frame is divided into four time-domain sub-channels, uplink time slots, and signaling information. Each sub-channel is responsible for transmitting a service; the uplink time slot ...

Embodiment 2

[0076] This embodiment presents the application in the duplex communication system of broadband wireless digital communication oriented to selectable services. The system requires four channels of downlink standard-definition digital TV broadcasting services within a given bandwidth, and can adjust each channel of service according to the user's uplink feedback; the uplink is implemented by WiFi, and the downlink is implemented by a photoelectric hybrid single frequency network system; The system can serve multiple users, and each user's receiver simultaneously receives one radio signal and one visible light signal. The method flow and transfer modes involved are detailed below:

[0077] The control center simultaneously sends data streams and control signals to the radio transmitter and the visible light transmitter, and uses a single frequency network adapter to ensure synchronization with the transmitter.

[0078] The above-mentioned transmission services require four-chan...

Embodiment 3

[0097] This embodiment provides an application in a downlink communication system oriented to positionable broadband digital terrestrial broadcasting. The system requires four channels of downlink standard-definition digital TV broadcasting services within a given bandwidth; each transmitter needs to transmit relevant information for positioning in addition to transmitting service data, and the indoor visible light transmitter uses a shared optical modulator solution Realize visible light single-frequency networking; the receiver can receive multiple radio signals and multiple visible light signals at the same time. The method flow and transfer modes involved are detailed below:

[0098] The control center simultaneously sends data streams and control signals to the radio transmitter and the visible light transmitter, and uses a single frequency network adapter to ensure synchronization with the transmitter.

[0099] The above-mentioned transmission services require four-chan...

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Abstract

The invention discloses a photoelectric hybrid single-frequency network broadcasting method and a photoelectric hybrid single-frequency network broadcasting system. The method comprises the followingsteps: 1,the control center sends data streams and control signals to the radio transmitter and the visible light transmitter at the same time. A single-frequency network adapter is utilized to ensuresynchronization between the single-frequency network adapter and the transmitter; digital signal processing processes of the radio transmitter and the visible light transmitter before digital-to-analog conversion are kept consistent. Different transmitters respectively process according to the physical characteristics of different signals to obtain and transmit radio signals and visible light signals, and a receiver can independently receive the radio signals or the visible light signals, and can also simultaneously receive the two signals and perform superposition in different modes. According to the method, an equivalent hybrid single-frequency network system framework is realized, frequency resources are saved, the spectrum utilization rate is improved, a receiver can receive and combine radio signals and visible light signals, and seamless connection of indoor and outdoor signal coverage and seamless switching of signal receiving are realized.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a broadcasting method and system for a photoelectric hybrid single frequency network. Background technique [0002] As one of the most important sources of information and entertainment in people's daily life, the radio broadcasting system represented by the digital television terrestrial broadcasting (DTTB) system has been widely popularized in recent decades, and the radio communication technology and standards have also been rapidly developed. develop. Compared with analog TV, digital TV has the characteristics of strong anti-interference ability, high spectrum efficiency, support for multiple multiplexing methods, and support for multiple value-added services. Compared with various radio broadcasting systems such as satellite systems and cable networks, the DTTB system based on terrestrial TV transmission towers can adapt to a more flexible and complex receiving envir...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04W4/33
CPCH04B10/116H04W4/33
Inventor 杨昉王甫镔宋健潘长勇王劲涛张超彭克武
Owner TSINGHUA UNIV
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