Reliability checking for digital modulation schemes in 4G - 5G communication system: Comparison between QPSK and QAM modulation techniques for beyond LTE

Abstract

In recent days, there have been a race among the communication systems in different schemes and generations. Day by day the data transmission rate is increasing and breaking the record of previous generations. Now, people are thinking of transmitting data beyond imagination. Also, engineers and scientists are also stepping forward for transmitting in a huge range of data. In recent times, 4th Generation and 5th Generation communication system are on transitional state. 4th Generation is almost getting replaced with 5th Generation communication architecture. For LTE and beyond LTE communication system several types of digital modulation schemes are used. Among them QPSK and QAM are quite frequently used. In this research paper, comparative analysis over simulation in a virtual environment (Simulink Based) for these two types of digital modulation schemes in 4G and beyond 4G communication architecture. In both of the cases, BER (Bit Error Rate) with respect to SNR (Signal to Noise Ratio) have been compared for the better and efficient output.