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Spectrally precoded orthogonal frequency-division multiplexing with cyclic prefix (SP-CP-OFDM) and SP-CP-OFDM multiple access (SP-CP-OFDMA) are investigated in this paper. A general constraint on spectral precoding is developed for both SP-CP-OFDM and SP-CP-OFDMA signal formats with unconstrained guard ratios and arbitrary input data statistics to ensure very small power spectral sidelobes decaying...
Adaptive spectrally precoded orthogonal frequency-division multiplexing (ASP-OFDM) is a recently proposed adaptive modulation scheme to significantly improve the system throughput in adaptive OFDM applications. In this paper, new spectral precoder is proposed for ASP-OFDM with cyclic prefix (ASP-CP-OFDM) on the flat fading channel. By jointly adapting the precoding order for spectral precoder and...
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