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TDD-OFDM digital networking image transmission system

A technology of transmission system and digital group, which is applied in the direction of transmission system, multi-frequency code system, network planning, etc., can solve the problems of non-line-of-sight transmission and mobile transmission, and long-distance transmission capability, so as to improve the rapid fading Effect

Inactive Publication Date: 2013-08-28
NANJING GUOXIANG ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these devices work on high frequency bands, and do not have non-line-of-sight transmission and mobile transmission, let alone long-distance transmission capabilities.

Method used

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  • TDD-OFDM digital networking image transmission system

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Embodiment Construction

[0019] TDD-OFDM digital wireless network image communication system is a new generation wireless transmission system specially designed for mobile image network monitoring and mobile data transmission in urban environment. TDD-OFDM digital wireless network image communication system maintains many advantages of COFDM non-line-of-sight and high-speed mobile transmission. It realizes the same-frequency networking transmission and communication functions that traditional COFDM and single-carrier systems do not have. The transmission capacity of the system is large, and the bandwidth and data rate can be dynamically changed according to different business needs. So as to achieve the effect of maximizing distance and optimizing power. The product is suitable for applications such as front-end image acquisition and transmission in urban emergency command, public security technical investigation image monitoring, safe city monitoring, military field data transmission, and sea ship d...

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Abstract

The invention discloses a TDD-OFDM digital networking image transmission system which comprises a network composed of multiple sets of TDD-OFDM image devices and a command center. Each set of TDD-OFDM image devices comprise an image collecting device, a far-end transmission device and a base station. Each image collecting device is used for collecting signals and sending the signals to the command center through one far-end transmission device and one base station sequentially. The image collecting devices, the far-end transmission devices and the base stations work in the same frequency. According to the TDD-OFDM digital networking image transmission system, same frequency networking can be achieved, high-speed networking communication under a non-visual condition in a complex urban environment is achieved, and networking modes are various.

Description

[0001] technical field [0002] The invention relates to a digital network image transmission system, in particular to a TDD-OFDM (Time Division Orthogonal Frequency Division Multiplexing) digital network image transmission system. Background technique [0003] With the development of urbanization, the construction of public safety facilities has increasingly become an integral part of urban development. Among them, the requirements for remote mobile video surveillance, mobile data transmission, wireless data transmission and other systems are increasing day by day, and they need to be combined with network systems to realize real-time, non-regional, and unimpeded transmission of a large amount of video data. [0004] In terms of image transmission, COFDM (orthogonal frequency division multiplexing) system, single carrier system, CDMA system, etc. have appeared successively. Although these products have played a part to a large extent, their point-to-point transmissio...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L27/26H04W16/02
Inventor 桑明华
Owner NANJING GUOXIANG ELECTRONICS TECH