Multimode digital television exciter

Abstract

The invention relates to a multimode digital television exciter, which comprises a channel encoding unit, a digital precorrection unit, a digital/analog (D/A) conversion unit, an orthogonal modulation unit, a broadband local oscillation unit, a power regulation and amplification unit and a control unit, wherein the channel encoding unit is a multi-standard channel encoding unit; and the digital precorrection unit is a multi-standard digital precorrection unit. Therefore, digital television standards, such as digital terrestrial multimedia broadcasting (DTMB), integrated services digital broadcasting (ISDB)-television (T), and digital video broadcasting (DVB)-T/H are realized through the multi-standard channel encoding unit; the standards can be switched in real time, and have extremely high capacity expandability; and furthermore, digital television standards and mobile television standards which are used in the whole world can be realized.

Description

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

AI Technical Summary

Benefits of technology

This patented technology allows multiple types of analog television (TV) channels with varying levels of resolutions to be transmitted over communication networks without causing any issues such as interference between them. By performing these techniques at both ends of each transmission line, this system becomes better able to transmit high definition video content that requires higher bandwidth than traditional broadcast systems like cable modems. Additionally, the inventors have developed an improved method called Multiplexed Digital PreCorrecting (MDPC), which helps correct errors caused during reception while also being capable of handling various forms of noise introduced into the network's radiofrequency spectrum. Overall, they aim to enhance performance and maintain reliable operation across diverse environments where there are many different versions of standardized devices operating within range from low frequencies up to 5 GHz.

Problems solved by technology

Technological Problem addressed by this patented technical issue relates to improving the efficiency and performance of multiple mode analog television systems while reducing costs associated with each type of signal transmitting device.

Images