Partial Update Sequential Probabilistic Integer Least Square Inter Carrier Interference Mitigation Algorithm in Mobile OFDM System

Abstract

The performance of mobile orthogonal frequency division multiplexing (OFDM) system is affected by the intercarrier interference (ICI). A recently proposed sequential probabilistic integer least squares (SPILS) algorithm remarkably improves the performance of ICI mitigation. The corresponding low complexity Quick SPILS (QSPILS) algorithm is also proposed to reduce the complexity of SPILS algorithm but at the cost of rapidly reducing the performance. In this letter, we propose a new low complexity SPILS algorithm by using the banded property of the frequency domain channel matrix. The proposed algorithm achieves the performance much closer to that of the SPILS and at the same time requires the computation complexity on the same level of that of QSPILS algorithm.