Unlock instant, AI-driven research and patent intelligence for your innovation.

Single frequency network signal line style coverage method for rail traffic

A technology of rail transit and single frequency network, applied in communication between multiple stations, diversity/multi-antenna system, space transmit diversity, etc., can solve problems such as deterioration of signal-to-noise ratio, eliminate influence and improve coverage efficiency Effect

Inactive Publication Date: 2010-02-03
SHANGHAI JIAOTONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of SFN signal linear coverage method for rail traffic, make it solve the signal-to-noise ratio deterioration caused by the SFN signal overlap area of ​​rail traffic, At the same time, the field strength in the overlapping area is usually the lowest in the coverage area, which overcomes the influence of the signal overlapping area of ​​the rail transit SFN signal on the signal coverage design, and greatly improves the system link design index

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single frequency network signal line style coverage method for rail traffic
  • Single frequency network signal line style coverage method for rail traffic
  • Single frequency network signal line style coverage method for rail traffic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] like figure 1 As shown, it reflects the signal field strength distribution diagram between two base stations when the transmitting antenna adopts the omnidirectional antenna and the directional antenna when the method of the present invention is not applied, the solid line represents the effect of the omnidirectional antenna in the figure, and the dotted line represents the directional Antenna effect. When the transmission power of the two transmitting base stations is equal and the antenna parameters are the same, it can be seen that the overlapping area is located in the middle of the coverage area, and is located in the part with the lowest signal field strength in the entire coverage area; the overlapping area is omnidirectional and Under the directional condition, the position remains the same, but the overall field strength in the coverage area increases when the directional antenna is used.

[0032] like figure 2 As shown, the structure of the receiver 60 adop...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The disclosed single-frequency network signal line type coverage method for rail traffic refers to idea of overlay area reverse displacement, wherein in receiver, using two directional antenna and modems for signal processing; to every antenna, the overlay area moves toward the reverse direction of antenna main-lobe direction; receiver uses proper algorithm to incorporate the demodulated two-pathsignal for removing the overlay area. This invention models the coverage area to optimize the antenna parameters, therefore improves system link design index obviously.

Description

technical field [0001] The invention relates to a signal covering method in the technical field of telecommunication, in particular to a single frequency network signal line covering method used in rail transit. Background technique [0002] With the rapid development of digital technology, the field of radio and television is facing a new revolution, and all fields related to radio and television technology are developing at a high speed in the direction of digitalization. The rapid development of digital TV technology makes it possible to watch stable digital broadcasting programs in a high-speed mobile environment. In recent years, with the substantial expansion and speed-up of railways, more and more people choose to travel by train. However, since there is no digital broadcast coverage network for rail transit, thousands of trains distributed on the rails have become The blind area covered by digital broadcasting, millions of passengers who take the train every day can...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04B7/26H04B1/40
Inventor 马文峰归琳金济华施洋陆靖侃
Owner SHANGHAI JIAOTONG UNIV