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A Dual-Window Technique for Reducing Frequency Offset Sensitivity of OFDM

This paper develops a dual-window technique to reduce the sensitivity to carrier frequency offset (CFO) of orthogonal frequency-division multiplexing. We define two windows and use them alternately onto the subcarriers one another in adjacent for pulse shaping at the transmitter. The receiver selects one of the two windows to maximize the output of the desired subcarriers and suppresses the others by window- matching and anti-matching functions respectively. The efficiency of the proposed method is demonstrated in the theoretical analysis and in the simulations as well.