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Maximum Likelihood Based Estimation of Frequency and Phase Offset in DCT OFDM Systems Under Non-Circular Transmissions: Algorithms, Analysis and Comparisons

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Executive Summary

Recently, the advantages of the Discrete Cosine Transform (DCT) based Orthogonal Frequency-Division Multiplexing (OFDM) have come to the light. The authors thus consider DCTOFDM with non-circular transmission (the authors' results cover circular transmission as well) and present two blind joint maximum-likelihood frequency offset and phase offset estimators. Both the theoretical analysis and numerical comparisons reveal new advantages of DCT-OFDM over the traditional Discrete Fourier Transform (DFT) based OFDM. These advantages, as well as those already uncovered in the early works on DCT-OFDM, support the belief that DCT-OFDM is a promising multi-carrier modulation scheme.

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