Self Heterodyne in MIMO OFDM system on Relay path Analysis

Abstract

Multiple input, multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) is the dominant air interface for broadband wireless communications (4G & 5G). Heterodyning, also called frequency conversion, is used widely in communications engineering to generate new frequencies and move information from one frequency channel to another. In Our Project, we proposed a multiple-input multiple-output (MIMO) self-het OFDM with the adaption of smart carrier position (SCP) technique. At the transmitter, a space-time block code (STBC) is used to produce the coded information symbols to be transmitted on each antenna over the self-het OFDM subcarriers. At the receiver, a simple non-linear detection is adopted at each receiver communication side. The achievable diversity order of such setting is analyzed, and it is found that with the adaptation of SCP technique, the diversity loss in comparison to the conventional coherent MIMO-OFDM can be compensated. In MIMO System we used the Altamonte code and SCP technique with different modulation process.