Massive MIMO Implementation with Space-Time Block Coding

Abstract

Problems including intercarrier interference, delay spread, doppler spread, and inter symbol interference (ISI) may occur in wireless communication due to multipath signal transmission. The use of OFDM technology with a cyclic prefix is used to tackle these challenges. But there's a catch: a high peak-to-average power ratio (PAPR), which makes the power amplifier act more non-linearly. Hence, spectral efficiency, in-band distortion, out-of-band emissions, and bit error rate (BER) are all impaired. There have been a number of complex PAPR reduction solutions proposed within the last few decades. Due to its inadequacy in meeting the requirements of 5G wireless communication, OFDM technology is not suited for 5G communications. We proposed a modification to the 5G candidate waveform, OFDM, and FBMC that would enhance spectral efficiency while reducing latency, out-of-band emissions, and PAPR. The output of the FBMC is sent into Uplink-Massive MIMO communication systems to enable communications over longer distances. The proposed Massive MIMO uses space temporal block coding (STBC) to increase security with little computational complexity. Several simulated metrics show that the proposed method performs better than more conventional 5G alternatives.