At present, we use the fourth generation mobile communication technology, 4G, and the development and standard development and standard development of the fifth-generation (5G) system have not fully deployed, it is already in full swing, it is for more than 2020 mobile communication needs The new generation of mobile communication systems, with ultra-high spectrum utilization and energy efficiency, will increase a magnitude or higher than 4G in terms of transmission rate, delay, etc., 5G mobile network vision is to achieve "Everything, anywhere Access ", so the 5G system has put forward higher requirements for carrier transmission technology.
Figure 1: Development of mobile communication technology and standards
The Wireless Communication Research Laboratory of Istanbul Technology is conducting carrier technology, although the current communication standards use OFDM technology (Orthogonal Frequency Division Multiplexing, orthogonal division multiplexing technology), its modulation and demodulation is based on IFFT and FFT are implemented, with low complexity, but it is less suitable for the 5G system, first of all the subcarriers must be synchronized to maintain orthogonality, the cost of synchronizing when there is a massive sensing node in the cell, second The OFDM uses square wave as a baseband waveform, and the carrier is large, and it is difficult to use the fragmentation frequency band. UFMC technology (Universal Filtered Multicarrier, universal filtering multi-carrier) has a significant advantage that filtering each sub-band, and the synchronization requirements are relatively low, while reducing the complexity of the baseband algorithm.
Figure 2: 5G UFMC experiment platform based on NI SDR products
Wireless Communication Research Laboratory of Istanbul Technology Based on Ni SDR (Software-Defined Radios, Software Definition Radio) products built 5G UFMC test platform, using two USRP-2921 SDRs (Xilinx Spartan-6 FPGA), a PXI- 6683H Timing Module (based on Xilinx Virtex-5 FPGA), a PXIE-5644R vector signal transceiver module (based on Xilinx Virtex-6 FPGA) and Ni LabVIEW system integration tool, through testing they have achieved better spectrum characteristics and better Subband filtering method.
NI SDR products help researchers more and more convenient to build test projects, it has rich engineering examples and mature user communities, Ni LabVIEW visualization system integration is also more intuitive and efficient, can say Ni SDR has perfect wireless communication technology ecological resources . In addition, the project obtained the most influential awards of RF and mobile communication packets at the 2017 NI Technology Summit.
Original link: https://www.eeboard.com/news/5g-21/
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