With the rapid development of network technology and wireless technology, a variety of network technology, network products have emerged, wireless transmission technology is increasingly being accepted by all walks of life. 4G Cell Phone Jammer Wireless video transmission as a special usage is gradually being optimistic about the majority of users. Wireless transmission occupies an important position in the emergency command system. So, the advantages of wireless transmission of their own development and transmission constitute what?
A wireless video transmission "dotting" Emergency Command System
Although wireless mobile video transmission system in the emergency command system support platform in a small proportion, but often at a critical time played a key role in the finishing touch.
Emergency Command System wireless mobile communication device video transmission system products with highly targeted, in addition to communications command vehicle platform, but also widely used in professional rescue vehicles, specialized anti-riot vehicles, helicopters, unmanned aerial vehicles, various types of aircraft and robot platform Since wireless transmission system application development company for emergency command system has a thorough understanding and knowledge of the user's professional applications and needs, therefore, are very suitable for the development of products supporting the use of emergency command system, such as Shenzhen Keweitai adoption of multi-carrier modulation technology system has inherent advantages, namely the one-way transmission, central receiving system zero interference, unlike the two-way data transmission systems, electromagnetic interference and radio resources growing scarce today, which is to ensure system integration based Emergency Command System reliability and availability guarantee. 4g cell phone jammer
Faced with complex emergencies site environment, not only to consider the multi-sectoral coordination and cooperation communication tools, as well as consideration of interoperability between systems and independence, set of equipment if interference with other systems work, it will destroy the other systems as well normal operation of the emergency rescue platform, as long as a link error, it will lose the whole game.
Two, highlighting the advantages of wireless monitoring . 4g cell phone jammer
Wireless transmission technology exists networking flexibility, opened quickly, the advantages of low maintenance costs, and thus its application there is a huge market. However, with the rapid development of wireless transmission technology, its security problem is getting people's attention.
Low comprehensive cost: just a one-time investment, no trenching pipe, especially for outdoor distance and has been renovated occasions; In many cases, users are often restricted due to the geographical environment and job content, such as mountains, harbor and open to other special geographical environment, wired networks, cable transmission wiring works great inconvenience, wired construction cycle is very long, and even impossible to achieve. At this time, the use of wireless monitoring can get rid of the shackles of cable, there are short installation period, easy maintenance, strong expansion capability, rapid recovery of the cost advantage.
Flexible networking: scalability, plug and play, managers can quickly add new wireless monitoring points to an existing network, no need for new transmission network rollout, additional equipment, easily remote wireless monitoring. 4g cell phone signal jammer
Low maintenance costs: wireless monitoring and maintenance is maintained by the network provider, the front-end equipment is plug and play, maintenance-free system. Although the security of wireless transmission equipment on the market through a variety of mechanisms to enhance its security, but many people in the industry study found that confidentiality agreements with a variety of security vulnerabilities exist, such as he can not guarantee the confidentiality of data, integrity and the access of users to achieve authentication.
Third, wireless transmission technology analysis
A microwave wireless transmission technology for
It can be divided into analog and digital microwave microwave in two ways.
Simulation of Microwave: This is to transmit the modulated video signal directly on the microwave channel, through the antenna out, the monitoring center receives microwave signals through the antenna, and then demodulated by the microwave receiver original video signal.
According to carry away Tiancheng Dan Zhaozhao introduction, this monitor mode without compression loss, almost no delay, so you can ensure that the video quality, but it is only suitable for point to point single channel transmission, not suitable for the size of the deployment, in addition to the calibration process because there is no modulation, anti- interference poor, almost can not use a wireless signal environment under complex situations. And the lower the analog microwave frequencies, the longer the wavelength, the strong diffraction ability, but can easily interfere with other traffic, so in the 1990s, this way more use, almost rarely used.
Digital Microwave: digital microwave that is first compressed video signal encoding, modulation via digital microwave channel, re-use antenna out; receiving end on the contrary, the received signal from the antenna, then microwave despreading and video decompression, and finally reduced to simulate the video signal transmission out, this approach is currently used in many domestic markets. The scalability of large digital microwave communication capacity of at least a dozen channels available and relatively easy to construct, high communication efficiency, the use of flexible. There are advantages of digital microwave analog microwave can not be compared, such as monitoring points are more and more need to add relay case, the situation is complex and the source of interference and more occasions.
Summarize, digital microwave capacity, strong anti-interference ability, confidentiality, and the same transmit power over longer distances, less affected by terrain or obstacles, rich interface, strong expansion capability, and so on. Conversely, analog microwave does not have these advantages, and only cost a little cheaper. 4g cell phone jammer
没有评论:
发表评论