Performance Measures of Spatially Multiplexed MIMO-OFDM System using Different Modulation Techniques

Multiple input multiple output (MIMO) systems employ more than one antenna at each of the two ends of the communication link and may transport at least two data streams over a single channel without requiring additional transmission capacity or power. In order to construct a stable communication stream, the receiving side should often have more antennas than the broadcasting side. Because of their better presentation abilities, MIMO frameworks have quickly gained popularity over the last decade. However, multi-stream interference and inter-symbol interference are encountered in spatially multiplexed MIMO systems as a result of the remote channel’s time-dispersive characteristics. To provide dependable and reliable communication, the influence of interference must be appropriately limited at the recipient. In order to counteract interference in spatially multiplexed wireless channels, orthogonal frequency division multiplexing (OFDM) is usually used. The study found that combining MIMO and OFDM delivers higher productivity, unwavering quality, gain, and information rate, and that it is an appealing air-interface suggestion for next-generation WLAN and WMANs. As a result, a spatially multiplexed MIMO-OFDM system was developed in this study, and performance measures such as bit error rate and bit energy to noise ratio were investigated using various modulation methods. At the receiver, the proposed method uses a zero forcing equalizer to spatially de-multiplex the data.