Although V-OFDM system and DFT scrambling vector OFDM system are suitable for frequency-selective fading channels, channel estimation error may significantly degrade the achievable BER performance. In this paper, a new frequency-domain scrambling differential detection and equalization is proposed for DFT-SV-OFDM system, where a scrambling decision feedback is used at the receiver to provide a reliable noise-reference signal, thus reducing the error propagation. Compared with the two existing systems, the new scheme shows a comparable performance but more robust against the channel estimation error.
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