Recently, a Fraunhofer Institute in Germany and the Karlsruhe Institute of Technology have jointly completed a technology that uses the 240 GHz band for wireless transmission. This technology can achieve 40 Gbit/s wireless transmission over a communication distance of more than 1 km. To reach the capacity of optical fiber communications. In a recent demonstration, this technology has achieved a new world record in wireless data transmission. At the same time, this technology also makes up for the inability of broadband Internet to provide network access in rural areas.
In modern society, with the continuous development of digital, mobile, and networked transmission media, greater data capacity and faster transmission speeds are required. Statistics from the European Communications Commission show that compared with European standards, the level of fiber optic networks (fibre to the home) in Germany is relatively backward. The reason for this result is that the deployment cost of optical fiber cable is high and it is limited by the influence of the natural environment and the urban environment. For example, rivers and traffic lanes are difficult to deploy. Broadband wireless transmission technology can be applied in areas where fiber deployment is inconvenient. Therefore, this technology can promote the extension of network infrastructure. In the suburbs, compared with fiber to the home, this is also a low-cost, efficient and flexible choice.
Researchers have created a new world record in the field of wireless data transmission: the first time they independently developed new hardware that can be used for 240GHz wireless transmission. The hardware integrates an electronic receiver and transmitter with data transfer rates up to 40 Gbit/s. This is equivalent to transmitting a complete DVD in one second. The Karlsruhe Institute of Technology in the project called "Millilink" conducted experiments on two long-distance skyscrapers and confirmed that the technology can reach a distance of more than 1 km.
Figure 1: Demonstration equipment on a skyscraper in Karlsruhe, Germany
High frequency enables high data rates
The use of the high frequency band of 200 to 280 GHz not only realizes high-speed transmission of large-capacity data, but also realizes high-density technology assembly. Since the electronic circuit and antenna size are related to the operating frequency/wavelength (the higher the operating frequency, the smaller the size), the transmitting and receiving chip used by this technology is only 4*1.5 mm2. The Fraunhofer Institute uses high-matter-mobility transistors to develop a semiconductor technology that produces electronic transceivers in the form of high-density integrated circuits that can operate in the high frequency range from 200 to 280 GHz. Jochen Antes of Karlsruhe Polytechnic Institute pointed out: "The wireless transmission technology working in this frequency band is easier to install and transmit than the free space optical fiber system, and it is more robust under bad weather such as fog and rain."
Figure 2: 4x1.5mm 2 high frequency chip
At this stage, the application of wireless transmission has not been able to obtain the transmission rate of the optical fiber, and the test results of the project show that this status quo will be changed in the future. This high-performance system also has the bit-rate transparency of the fiber network. That is, signals in the fiber can be directly transcoded into wireless transmission link signals without energy loss. The signals can continue to be transmitted and converted again into signals transmitted in the optical fiber. The transmission rate record obtained during the test phase is only the beginning. Antes said: "Using more complex modulation formats or multiplexing techniques to increase spectrum efficiency will help achieve higher data rates." This technology will promote the expansion of broadband networks and change Germany's backwardness in optical fiber networks. status quo.
About this project
The Federal Ministry of Education and Research (BMBF) "Next Generation Broadband Access Network" support fund allocates 2 million euros to support the "Millilink" project. In addition to the Fraunhofer Institute and Karlsruhe Institute of Technology two research institutes, the project also includes industrial partners Siemens (AG), Kelsey (KG) and RadiometerPhysicsGmbH (RPG). The goal of the project is to integrate wireless link transmissions with broadband optical communications networks to provide high-speed network services to the suburbs. Another possible application is indoor wireless local area networks (WLANs), wireless personal area networks (WPANs), and internal and ship-to-ship communications.
In modern society, with the continuous development of digital, mobile, and networked transmission media, greater data capacity and faster transmission speeds are required. Statistics from the European Communications Commission show that compared with European standards, the level of fiber optic networks (fibre to the home) in Germany is relatively backward. The reason for this result is that the deployment cost of optical fiber cable is high and it is limited by the influence of the natural environment and the urban environment. For example, rivers and traffic lanes are difficult to deploy. Broadband wireless transmission technology can be applied in areas where fiber deployment is inconvenient. Therefore, this technology can promote the extension of network infrastructure. In the suburbs, compared with fiber to the home, this is also a low-cost, efficient and flexible choice.
Researchers have created a new world record in the field of wireless data transmission: the first time they independently developed new hardware that can be used for 240GHz wireless transmission. The hardware integrates an electronic receiver and transmitter with data transfer rates up to 40 Gbit/s. This is equivalent to transmitting a complete DVD in one second. The Karlsruhe Institute of Technology in the project called "Millilink" conducted experiments on two long-distance skyscrapers and confirmed that the technology can reach a distance of more than 1 km.
Figure 1: Demonstration equipment on a skyscraper in Karlsruhe, Germany
High frequency enables high data rates
The use of the high frequency band of 200 to 280 GHz not only realizes high-speed transmission of large-capacity data, but also realizes high-density technology assembly. Since the electronic circuit and antenna size are related to the operating frequency/wavelength (the higher the operating frequency, the smaller the size), the transmitting and receiving chip used by this technology is only 4*1.5 mm2. The Fraunhofer Institute uses high-matter-mobility transistors to develop a semiconductor technology that produces electronic transceivers in the form of high-density integrated circuits that can operate in the high frequency range from 200 to 280 GHz. Jochen Antes of Karlsruhe Polytechnic Institute pointed out: "The wireless transmission technology working in this frequency band is easier to install and transmit than the free space optical fiber system, and it is more robust under bad weather such as fog and rain."
Figure 2: 4x1.5mm 2 high frequency chip
At this stage, the application of wireless transmission has not been able to obtain the transmission rate of the optical fiber, and the test results of the project show that this status quo will be changed in the future. This high-performance system also has the bit-rate transparency of the fiber network. That is, signals in the fiber can be directly transcoded into wireless transmission link signals without energy loss. The signals can continue to be transmitted and converted again into signals transmitted in the optical fiber. The transmission rate record obtained during the test phase is only the beginning. Antes said: "Using more complex modulation formats or multiplexing techniques to increase spectrum efficiency will help achieve higher data rates." This technology will promote the expansion of broadband networks and change Germany's backwardness in optical fiber networks. status quo.
About this project
The Federal Ministry of Education and Research (BMBF) "Next Generation Broadband Access Network" support fund allocates 2 million euros to support the "Millilink" project. In addition to the Fraunhofer Institute and Karlsruhe Institute of Technology two research institutes, the project also includes industrial partners Siemens (AG), Kelsey (KG) and RadiometerPhysicsGmbH (RPG). The goal of the project is to integrate wireless link transmissions with broadband optical communications networks to provide high-speed network services to the suburbs. Another possible application is indoor wireless local area networks (WLANs), wireless personal area networks (WPANs), and internal and ship-to-ship communications.
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