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

Variable time offset in a single frequency network transmission system

A technology of time offset and transmission system, which is applied in transmission system, digital transmission system, broadcast transmission system, etc.

Inactive Publication Date: 2017-08-18
无线电技术研究学院有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is no longer possible to resist poor reception

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
  • Variable time offset in a single frequency network transmission system
  • Variable time offset in a single frequency network transmission system
  • Variable time offset in a single frequency network transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] figure 1 A transmitter 1.1 with an emission area 2.1 and a further transmitter 1.2 with an emission area 2.2 are shown. The transmitters 1.1 and 1.2 transmit information signals using the same frequency and thus form a single frequency network (SFN). The transmitters 1.1 and 1.2 are arranged in such a way that the associated transmission areas 2.1 and 2.2 partly overlap and thus form an overlapping area 2.3. Interference occurs in the overlap region 2.3. Interference in the overlap region 2.3 is usually beneficial in nature due to the fact that there is an SFN. However, they can also be destructive. If there is destructive interference in the overlap area 2.3, the information signal is partially or totally canceled and therefore the information signal to be received by the receiver is unusable. It should also be mentioned here that destructive interference can also occur in the transmission areas 2.1 and 2.2 if the information signal destructively interferes with th...

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 invention relates to transmitters, transmission systems, transmission methods, and displacement units in a single frequency network (SFN). The present invention, according to a first aspect, proposes providing a transmission system to transmit an information signal in a single-frequency network (SFN) comprising a plurality of transmitters (1) to transmit said information signal to at least one receiver, characterized in that at least one transmitter (1) of the transmission system is adapted to transmit said information signal (IS) with a time offset (4, 6, 7), wherein the time offset varies over time, thereby said information signal (IS) transmitted by said at least one transmitter (1) is received with a second time offset by said at least one receiver, in order to enhance the reception quality and minimize a signal cancelation.

Description

technical field [0001] The present invention relates to a transmitter, a transmission system, a transmission method and a displacement unit in an "equal frequency" network known as a single frequency network (SFN). [0002] A transmission system according to the preamble of claim 1 is known from DE19644430. Background technique [0003] A Single Frequency Network (SFN) consists of a number of transmitters that are spatially distributed over a contiguous area and broadcast the same information synchronously with each other using the same transmission frequency. It is known that in SFN the transmission area is provided with the same information signal and thus available to many users or receivers. The information signals broadcast in the broadcast area of ​​the transmitter are advantageously summed such that uninterrupted reception is ensured. However, in some cases, destructive interference may occur in the broadcast area or in the transmission area, for example because of ...

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 Applications(China)
IPC IPC(8): H04H20/67
CPCH04H20/67H04L27/2646
Inventor S·托伊舍
Owner 无线电技术研究学院有限公司