On Optimum Segment Combining Weight for ICI Self-Cancellation in OFDM Systems under Doubly Selective Fading Channels

ICI self-cancellation algorithms are promising techniques to mitigate the ICI effect in OFDM systems caused by high mobility. In the area of ICI self-cancellation, the calculation of optimum combining weight is still an open question. In this paper, the problem of finding optimum combining weight to minimize the ICI-plus-noise power is formulated. We then derived a noniterative algorithm to find the optimum solution.We also compare the performance of the optimum combining weight with other existing combining weight methods.

[1]  Chia-Chi Huang,et al.  A Low Complexity ICI Cancellation Scheme with Multi-Step Windowing and Modified SIC for High-Mobility OFDM Systems , 2010, 2010 IEEE 71st Vehicular Technology Conference.

[2]  Chia-Chi Huang,et al.  EM-Based Iterative Receivers for OFDM and BICM/OFDM Systems in Doubly Selective Channels , 2011, IEEE Transactions on Wireless Communications.

[3]  Hsin-Piao Lin,et al.  A Low-Complexity Concatenated ICI Cancellation Scheme for High-Mobility OFDM Systems , 2007, 2007 IEEE Wireless Communications and Networking Conference.

[4]  Michael Faulkner,et al.  Low-Complex ICI Cancellation for Improving Doppler Performance in OFDM Systems , 2006, IEEE Vehicular Technology Conference.

[5]  G.L. Stuber,et al.  Interchannel interference analysis of OFDM in a mobile environment , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.

[6]  Alireza Seyedi,et al.  General ICI self-cancellation scheme for OFDM systems , 2005, IEEE Transactions on Vehicular Technology.

[7]  Sven-Gustav Häggman,et al.  Intercarrier interference self-cancellation scheme for OFDM mobile communication systems , 2001, IEEE Trans. Commun..

[8]  Ming-Xian Chang.  A novel algorithm of inter-subchannel interference cancellation in OFDM systems , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.