Augmented Generalized Quadrature Spatial Modulation (AGQSM): Performance Evaluation in Spatially Correlated Channels for Next-Generation Wireless Communications

The global impact of 4G brought about increases in mobile usage and network performance. 5G is building on this momentum, bringing substantial network improvements, including higher connection speeds, mobility, and capacity, as well as low-latency capabilities. In the recent technological development, 5G technology is on fore front for development of wireless connectivity between any two points on the earth compared to other technologies such as satellite, optical, WiMAX, WiFi or Bluetooth. It uses multiple antenna deployed at transmitter and receiver side which are actually spatially correlated to each other as less spacing between adjacent antennas and non-uniform scattering in wireless propagation. It degrades the error rate performance. Moreover, the demand for higher spectral efficiency is ever increasing. The Generalized Quadrature Spatial Modulation (GQSM) has recently been proposed to improve the spectral efficiency. This research work examines the transmit antenna correlation effect’s in terms of bit error rate (BER) analysis for GQSM-Quasi orthogonal space time block codes (QOSTBC). We use three distinct detection strategies for QOSTBC while analyzing a BER performance of three detection schemes for the GQSM. For the investigation, different transmit antenna spacing values of \(d_{t}\) = 0.1, 0.2, and 0.4 have been taken into consideration.The experimental results show that at the lower signal to noise ratio(SNR), i.e., SNR = 10 dB the effect of antenna correlation is low whereas at the higher SNR it is rising. Also, the effect of antenna correlation on one to another become approximately constant for SNR = 20 to SNR = 30. This practical outcome will be helpful in the estimation of the performance analysis.