IMPLEMENTATION OF MIMO-OFDM 10X10 AS A 5G DOWNLINK PHYSICAL LAYER IN 3.5 GHZ FREQUENCY WITH SOFTWARE-DEFINED RADIO

• Main Author: Rafi Armandsyah, Hadiyan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/56889
• Institution: Institut Teknologi Bandung

The desire for convenience is getting higher, one of which is the creation of future technology scenarios such as eMBB, URRLC, and mmTC. 5G technology is a solution to the need for better network quality, both in terms of speed, reliability, mobility, capacity, and other aspects. In Indonesia, the implementation of 5G technology is still in certain experimental locations. So that research on the 5G physical layer, especially at the 3.5 GHz frequency which is widely used by other countries, is needed. In this final project, a 5G downlink physical layer design research using SDR is carried out. The system chosen in this final project is MIMOOFDM 10x10. The OFDM technology used for 4G LTE is still the standard for the 5G physical layer. The use of MIMO technology usually uses 2x2, 4x4, 8x8, 16x16, or 64x64 configurations. In this final project, a research was conducted to test the performance of MIMO 10x10. The 10x10 MIMO-OFDM system is built in 5 2x2 MIMO chains using Alamouti's STBC scheme to create orthogonal channels. The designed transceiver was made using the LabVIEW program and tested using USRP B210. The experiment was carried out by simulating the transmission of bit and text data. In the test of sending random bits of data using the Monte Carlo 100x, BER is 0.0155, while for the test of sending text, BER 1,22 x 10-4 is obtained for the best simulation. This system is designed to use a bandwidth of 100 MHz with the FDD method so that the bandwidth becomes 50 MHz (3.5-3.55 GHz). The throughput obtained in this MIMO-OFDM scheme is 233.2 Mbps.