高清性色生活片

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          The two technical camps of the Internet of Vehicles, 5G is expected to break

          Electronic enthusiasts eight o'clock in the morning: In the industry, there is a widely circulated saying: "1G realized mobile calls, 2G realized SMS, digital voice and mobile Internet access, 3G brought a mobile Internet based on pictures, and 4G promoted With the development of mobile video, 5G networks are regarded as the basis for the interconnection of Internet of Things and Internet of Things in the future."

          There is an inevitable connection between 5G and the Internet of Vehicles. It can be said that how to develop the car network in the future? Going in that direction? Much depends on whether 5G technology can break through.

          When it comes to car networking, you have to mention LTE-V and DSRC. LTE-V and DSRC are the two major technology camps of the current Internet of Vehicles. The former is mainly promoted by domestic enterprises (Datang, Huawei, etc.), and the latter is dominated by countries such as the United States, Japan and Europe.

          LTE-V is an agreement for intelligent transportation and car networking applications specifically for shop floor communication. Due to the limitation of communication technology, the current LTE-V version belongs to 4.5G technology, and the implementation of the future 5G technology will enable LTE-V to evolve to 5G.

          DSRC, a dedicated short-range communication technology, is an efficient wireless communication technology that provides high-speed data transmission and guarantees low latency and low interference on the communication link.

          The two technical camps of the Internet of Vehicles, 5G is expected to break

          LTE-V includes two working modes: centralized LTE-V-Cell and distributed LTE-V-Direct. Among them, LTE-V-Direct mode can extend the vehicle's sensing range to a detection range of several hundred meters, which has great advantages compared with the detection range of current vehicle sensing systems such as radar and optical cameras.

          DSRC is an efficient wireless communication technology based on the IEEE802.11p standard, which enables real-time, accurate and reliable bidirectional transmission of images, voice and data in a small range.

          At present, the development of DSRC is more mature than LTE-V, and it is the mainstream technology of car networking in Europe and the United States. LTE-V is not standardized due to the lack of standards. However, compared to DSRC, LTE-V has a longer transmission distance, wider channel and better synchronization. With the further development of 5G technology, LTE-V will be able to evolve smoothly to 5G in the future.

          In summary, 5G technology promotes the development of vehicle networking. The maturity of 5G technology will help LTE-V win the high ground in the competition. In addition, China has launched LTE-V wireless technology and frequency division research and test work recently, which indicates that China has begun to fully deploy 5G-based autonomous vehicle communication technology.

          5G technology accelerates the process of intelligent car property

          The intelligent car has advanced sensors (radar, camera), controllers, actuators and other devices, and realizes intelligent information exchange with people, vehicles and roads through the vehicle sensing system and information terminal. At present, the definition of smart cars in countries such as Europe and the United States is mainly advanced driver assistance systems (ADAS), vehicle mobile applications and driverless technology, and is more integrated with urban intelligent traffic management.

          Compared with traditional cars, smart cars emphasize entertainment, intelligence, and more convenient services. Therefore, network integration is an inevitable trend in the development of smart cars.

          As mentioned earlier, 5G technology promotes the development of China's car networking. Because the Internet of Vehicles is the initial stage of smart cars, the development of 5G technology will further promote the industrialization process of China's intelligent networked cars.

          CCID Consulting, a research institute under the Ministry of Industry and Information Technology, predicts that by 2020, China's automobile sales will reach 31.39 million units, and the compound annual growth rate will exceed 5%. Among them, the penetration rate of smart cars will reach 25%, and the size of the domestic smart car market is expected to reach 109.7 billion yuan. From the perspective of the industry chain, terminal hardware manufacturers such as sensors, chips, network modules, and vehicle terminals are expected to benefit first.

          The huge industrial chain brings considerable economic scale. The rapid growth of 5G technology will accelerate its use in the field of intelligent networked vehicles, and further promote the process of China's intelligent networked automobile property. In the next few years, the intelligent property chain related property chain will usher in a period of rapid growth. I believe that the smart car technology will also make breakthrough progress.

          When the 5G technology matures, it will be the day when the autonomous car is really born.

          The Internet of Vehicles is the initial stage of smart cars, and fully automatic driving is the final stage of smart cars.

          To achieve the ultimate goal of autonomous driving, it is inevitable to solve the network delay problem. The current 4G technology has a certain information delay problem. The information delay is very dangerous for autonomous vehicles. Maybe a brake signal may emit a half accident for a serious accident. With the development of 5G technology, the signal delay problem is expected to be solved.

          On the one hand, 5G technology can distribute the network according to the priority of the data, so as to ensure that the control signal transmission of the self-driving car maintains a faster response speed.

          On the other hand, during the driving process of the two cars, the efficiency of the short-distance direct data connection is much higher than that of the bypass base station. 5G technology will allow direct communication of close-range devices, which will greatly reduce the overall network pressure and reduce the average delay.

          Solving the network delay problem, the technical problem of self-driving car will also be further solved. The future intelligent networked car will perfectly realize the intelligent information exchange and sharing between the car and people, cars and cars. By then, a safe, comfortable, energy-efficient and efficient way of travel is no longer a dream.

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          433MHZ Antenna

          With the rapid development of wireless sensing technology, 433 MHz wireless communication devices have been more widely used in portable devices, vehicle-mounted terminals, intelligent locks and other fields [1]. As an important part of wireless communication equipment, antenna is a key component that affects the overall performance of the communication system [2].

          Domestic and foreign scholars have been exploring the 433 MHz printed antenna with high gain and miniaturization for many years. However, there are two main trends in the design of 433 MHz printed antenna by previous scholars: one is to sacrifice size to ensure high gain, such as the structural scheme in literature [3]; The other is to sacrifice gain to ensure size miniaturization, such as the scheme in reference [4].

          Taking into account the effective size and gain characteristics of the antenna is the difficulty in the design of 433 MHz miniaturized printed antenna. Based on the research experience of domestic and foreign scholars on 433 MHz printed antenna, a 433 MHz miniaturized spiral printed antenna is designed based on the 1/4 wavelength monopole antenna. The simulation results show that the antenna occupies only 20?—35 mm2 and the effective gain is -4.14 dB.

          433MHZ Rubber Antenna ,433Mhz Patch antenna ,433MHZ antenna with magnetic base ,433MHZ Yagi Antenna

          Yetnorson Antenna Co., Ltd. , https://www.yetnorson.com

          高清性色生活片
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