Performance of beamforming with signal space diversity over rician fading channels

In this work, zero-forcing beamforming technique (ZFBF) is examined with signal space diversity (SSD) over Rician fading channels in MIMO systems. MIMO systems are so important for the ongoing 5G systems at physical layer. In MIMO systems, there are numerous antennas at the transmitter side. Besides that, there are various antennas at the receiver side. MIMO systems may be used for enhancing spectral efficiency and augmenting communication reliability. Moreover, this technology, particularly in the form of a good deal of antennas, commonly mentioned to as massive MIMO, is expected to be crucial in the transition from 5G to 6G. Rician fading (Ricean fading), is an extensively used practical random channel model in wireless communication systems. In Rician fading, besides a line-of-sight (LOS) propagation path, between the transmitter antennas and the receiver antennas, there are also multiple non-LOS propagation paths. 2 × 2, 3 × 3, 4 × 6 and 5 × 9 MIMO systems are investigated in this thesis and it is supposed that only the receiver side has a channel state information. Also, zero-forcing beamforming (ZFBF) technique is employed at the receiver for enhancing the spectral efficiency and signal space diversity (SSD) is utilized for boosting the system reliability. The original contribution of the thesis is by using zero forcing beamforming technique with signal space diversity over Rician fading channels enhance the system reliability no additional important costs or extra complexity. SSD can be implemented in two steps. Firstly, the signal constellation from that the modulated symbols are obtained by utilizing a proper rotation. Secondly, component interleaving step is employed. In this research, a notable bit error rate (BER) performance have been observed with using SSD into ZFBF systems over Rician fading channels. This advantage can easily result in savings in the context of transmit power consumption. The system model is explained and some numerical results are shown in ZFBF systems with SSD over Rician fading channels.