Research of Frequency Multiplexing in 5G Networks

Abstract

Frequency multiplexing techniques for 5G communications include large-scale antenna techniques and frequency division multiplexing techniques such as OFDM and GFDM. Reasonable use and development of these techniques can significantly reduce the cost of 5G technology deployment and improve the spectral efficiency. This paper firstly introduces the current status of multi-input multi-output large-scale antenna technology. This paper then describe the main challenges faced by large-scale antenna technology. Following this, this paper discuss related development and innovation directions, such as the adoption of compact and lightweight radiating devices and high-precision amplitude-phase calibration networks, which are crucial for improving the practicality and efficiency of large-scale antenna systems. Secondly, for OFDM technology, the performance of its improved f-OFDM and CP-OFDM in different situations such as BER is demonstrated. Finally, due to the limitations of OFDM, the SER performance of GFDM is investigated in this paper. To complement these discussions, this paper concludes by exploring the potential synergies between massive MIMO and advanced waveform technologies like f-OFDM and GFDM, highlighting how their integration could further enhance the performance and flexibility of 5G and future wireless communication systems.