anti-interference

Strong anti-interference capability, no noise accumulation
In the simulation of communication, in order to improve the SNR, required in the signal transmission process in a timely manner to the attenuation of the transmitted signal is amplified, signal transmission in the process will inevitably superimposed noise also are simultaneously amplified.DVB T RECEIVER With the increase of the propagation distance, cumulative noise increasing, in order to cause serious deterioration of transmission quality.
In digital communication, the digital signal amplitude for the finite discrete values (usually from the two amplitude ), in the transmission process while also disturbed by the noise, but when signal-to-noise deterioration to a certain extent, i.e., at appropriate distances using decision method of regeneration, and generates no noise and primary terminal as digital signals, so it can achieve the long distance and high quality of transmission.
For encryption processing
Information transmission security and confidentiality is becoming more and more important, digital communication encryption processing than analog communication much easier, in a voice signal as an example, through the digital signal after conversion can be a simple digital logic encryption, decryption processing.
For storage, processing and exchange
Digital communication signal and computer signal line, is a binary code, which is convenient for the network with computer, is convenient to use the computer to digital signals for storage, processing and exchange, the communication network management, maintenance of automation, intelligent.
The device facilitates integration, miniature
Digital communications using time-division multiplexing, without the need for a larger volume of filter. Equipment most of the circuit is a digital circuit, can be large-scale and ultra large scale integrated circuit, therefore has the advantages of small volume, low power consumption.
Easy to constitute an integrated digital network and integrated services digital network
Using digital transmission mode, can be programmed through the digital switching equipment for digital exchange, in order to realize the transmission and exchange of integrated. In addition, telephone service and various non voice service can be digitized, integrated services digital network.
Clear channel frequency band is wide
An analog telephone band for 4kHz bandwidth, a digital telephone about 64kHz, this is the analog communication still has vitality of the main reason. As the broadband channel ( optical cable, digital microwave ) a large number of use ( a pair of cables can be opened thousands of telephone channels ) as well as the development of digital signal processing technology ( can be a digital telephone digital rate from 64KB / s to 32KB / s compressed even lower code rate ), digital telephone bandwidth problem is not the main problem the.
The above knowable, digital communication has many advantages,DVB-T MPEG 4 so countries are active in the development of digital communication. In recent years, our country digital communication has obtained the rapid development, is moving in high-speed, broadband, intelligent and integrated direction.