Single-tap equalization for fast OFDM signals under generic linear channels

Channel cannot be compensated by single-tap equalizers in fast orthogonal frequency-division multiplexing (OFDM) easily unless the channel impulse response (CIR) is symmetric. In this letter, we propose a low-complexity fast OFDM scheme, which enables efficient single-tap equalization for generic linear channels without the symmetric limitation. Simulations under both wireless multipath fading and multimode fiber channels are provided to verify the feasibility. Compared with other schemes, the proposed technique is simpler and avoids net data rate loss. It is shown that this scheme exhibits better performance than the frequency-domain-equalization-based fast OFDM scheme under the wireless frequency-selective fading channel.