Transmission Analysis of OFDM System Based on Index Modulation and QPSK

With the continuous development of communication technology, people put forward higher and higher requirements for the next generation mobile communication system. With the large-scale popularization of 4G technology, the research of 5G technology has become the first research task of major institutions in recent years. How to design a communication system with higher speed, higher capacity and lower energy consumption has become an urgent task. Carrier index modulation system has become one of the research hotspots in recent years because of its better advantages such as low peak to average ratio and anti frequency offset. Starting from the transmission performance, this paper theoretically analyzes and deduces the bit error rate and spectrum of index modulation OFDM system, mainly studies the impact of bit rate on spectrum bandwidth and the advantages of SIM-OFDM compared with traditional OFDM system.