Inter carrier interference removal in MIMO - OFDM system

This review paper is about the schemes of removing the inter carrier interference in the multiple input multiple output–orthogonal frequency division multiplexing system. The inter carrier interference occurs by the frequency offsets. In the cellular communication system the inter carrier interference arises due to the fully loaded traffic conditions at the cell edge .which is removed by the combining the multiple cell coordinated or frequency reuse .The inter carrier interference occurs when the cyclic prefix length lesser than the channel impulse response .To mitigate this interference use the spatial diversity techniques are used. In this method by using the spatial techniques the length of the cyclic prefix becomes more than the channel impulse response. The inter carrier interference can also be removed by the single input multiple output but this is not the better method to remove the inter carrier interference as it does not remove the inter carrier interference properly. Inter carrier interference arises when the wireless channel estimation is done with the help of Doppler spread information and the data symbols detector. In the wireless channel estimation the inter carrier interference is removed by the parallel interference cancellation and the decision statistically combining method .The parallel interference cancellation and decision statistically combining methods are used at the receiver end.