Wireless transmission device used for enlarging coverage area of digital TV transmitter
A wireless transmission and digital TV technology, which is applied in the direction of pulse modulation TV signal transmission, color TV parts, TV system parts, etc., can solve the problem of expensive station building and a complete set of transmission equipment, failure of normal decoding of receiving equipment, single effect Frequency network is very different, to achieve high-quality and stable coverage, signal quality optimization, and low-cost effects
Inactive Publication Date: 2013-01-16
BEIJING TONGFANG GIGAMEGA TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method can be said to be a stable and reliable coverage method, and it is also a relatively mature method, but this method will be limited by the expensive cost of building a station and a complete set of transmission equipment
Another way is to use a dot patch or a repeater. This method is relatively simple, and the cost of the project is relatively much less, but its effect is quite different from that of the single frequency network.
Because a simple point complement or repeater not only amplifies the useful signal, but also amplifies the noise, that is to say, it will cause a certain degree of deterioration to the signal of the main station, and there will be only field strength but no signal quality. The phenomenon that the receiving device cannot decode normally, and this method makes the signal very unstable
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] Referring to the accompanying drawings, the master station of the present invention includes a master station digital TV transmitter, a power coupler, an adapter, a wireless transmission system and a transmitting antenna connected in sequence. The invention also includes a plurality of sub-stations arranged at the signal coverage edge of the main station, and the sub-stations include sequentially connected receiving antennas, main and backup stream regenerating systems, sub-station digital TV transmitters and transmitting antennas.
[0012] The digital TV transmitter of the main station of the present invention is responsible for transmitting the signal program to the set-top box of the user who can receive the signal. The power coupler is responsible for completing the output signal coupling, and then outputs the coupled signal to the adapter; the adapter converts the signal to the interface required by the wireless transmission system according to the requirement...
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
Login to View More Abstract
The invention provides a wireless transmission device used for enlarging the coverage area of a digital TV transmitter, which relates to the technical field of the signal transmission and the signal coverage of a digital ground TV transmitter. A main station of the wireless transmission device comprises a digital TV transmitter of the main station, a power coupler, a wireless transmission system and a transmitting antenna which are sequentially connected. The wireless transmission device is structurally characterized further comprising a plurality of auxiliary stations which are arranged at the signal coverage edge of the main station, and each auxiliary station comprises a receiving antenna, a code flow regeneration system, a digital TV transmitter of the auxiliary station and a transmitting antenna which are sequentially connected. An adapter is connected between the power coupler of the main station and the wireless transmission system. Compared with the prior art, the wireless transmission device can effectively enlarge the coverage area of the digital TV transmitter, and has the characteristics of low investment, low construction labor, stable coverage area and good signal performance.
Description
technical field [0001] The invention relates to the technical field of signal transmission and signal coverage of a digital terrestrial television transmitter, in particular to a wireless transmission device for expanding the coverage area of a digital terrestrial television transmitter. Background technique [0002] As digital TV gradually replaces analog TV, the signal coverage problem of digital TV transmitter and the transmission problem of digital TV signal stream have become a factor affecting the development of digital terrestrial TV. The promotion of digital TV will inevitably occupy a large number of frequency resources, but the frequency resources are limited. [0003] In the existing technology, in order to expand the coverage area of digital TV transmitters, one way is to achieve large-area coverage within a frequency range by means of a single frequency network, and the commonly used method is low-power multi-point coverage. This method can be said to be a...
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
Login to View More IPC IPC(8): H04N5/38H04N7/24
Inventor 姚权苏仲川陈敬东
Owner BEIJING TONGFANG GIGAMEGA TECH