DEVELOPMENT OF ORTHOGONAL TIME FREQUENCY SPACE (OTFS) RECEIVER SYSTEM USING SOFTWARE DEFINED RADIO (SDR)

• Main Author: Rizki Nur Rahman, Muhamad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74530
• Institution: Institut Teknologi Bandung

In the future, wireless communication technology is expected to provide various services, including those for mobile terminals. Furthermore, with the increasing demand for communication bandwidth and the limited availability of frequency spectrum, there is a growing trend towards utilizing higher frequency bands like millimeter waves. However, under these circumstances, conventional systems such as OFDM are susceptible to the challenges posed by high Doppler effects. Over the past few years, several system schemes have emerged in an attempt to tackle these challenges, and one of them is the Orthogonal Time Frequency Space (OTFS) modulation system. Research on this system has garnered significant attention, especially in the realm of real signal transmission.In this final project, a prototype receiver is developed as part of an OTFS modulation system transceiver, enabling real signal transmission. This prototype was created using MATLAB software in conjunction with the SDR Adalm Pluto device. Simple algorithms for frame synchronization, channel estimation, and equalization were implemented to ensure the receiver can effectively receive and recover data. To showcase data transmission, a straightforward encoding/decoding approach for text and image data was utilized. The system underwent testing by conducting real data transmission in an outdoor wireless channel using one SDR with transmitter and receiver antenna separation of 4.5m. The results demonstrated for a transmission of a picture at frequency carrier of 3.5 GHz with 0 dB gain TX and 50 dB gain RX, the Bit Error Rate (BER) has reached 0.005.