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Performance Evaluation of LTE and 5G Modeling over OFDM and GFDM Physical Layers

The next generation of mobile telephony aims to attain the increasing demands of users in terms of flexibility, bandwidth, spectral efficiency, energy efficiency, low latency, and quality of service. In this context, adaptations to the transmission system are needed in order to be able to cope with the exponential high-speed data increase with reliability, but also to cope with the expected applications, such as the Internet of Things (IoT) and tactile Internet. Researches have studied the adaptations that should be performed and one of the modifications is the physical layer used to transmit the signal. This paper aims to analyze and optimize the Bit Error Rate (BER) performance of Orthogonal Frequency Division Multiplexing (OFDM) and General Frequency Division Multiplexing (GFDM) which is a technique among the different types of modulation studied for 5G, operating in an Additive White Gaussian (AWGN) channel. This work also presents the performance of the possible received power levels according to the receiver and Ultra High Frequency (UHF) channels in the case of digital television. Fourier Transform is used as the mathematical model for performance evaluation and analyzes. The obtained results show that GFDM performs better in terms of interferences when Zero Forcing Receiver (ZFR) equalization is considered, which plays a key role in digital transmission.