A New Reduced-Complexity Detection Scheme for Zero-Padded OFDM Transmissions
Recently, Zero-Padding Orthogonal Frequency Division Multiplexing (ZP-OFDM) has been proposed as an alternative solution to the traditional Cyclic Prefix (CP)-OFDM, to ensure symbol recovery regardless of channels nulls. Various ZP-OFDM receivers have been proposed in the literature, trading off performance with complexity. In this paper, the authors propose a novel Low-Complexity (LC) receiver for ZP-OFDM transmissions and derive an upper bound on the Bit Error Rate (BER) performance of the LC-ZP-OFDM receiver. They further demonstrate that the LC-ZP-OFDM receiver brings a significant complexity reduction in the receiver design, while outperforming conventional Minimum Mean-Square Error (MMSE)-ZP-OFDM, supported by simulation results.