Maximum likelihood based estimation of frequency and phase offset in DCT OFDM systems under non-circular transmissions: algorith

Recently, the advantages of the discrete cosine transform (DCT) based orthogonal frequency-division multiplexing (OFDM) have come to the light. We thus consider DCTOFDM with non-circular transmission (our results cover circular transmission as well) and present two blind joint maximumlikelihood frequency offset and phase offset estimators. Both our 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.

• Type: Journal
• Year: 2008
• Where: TCOM
• Authors: Feifei Gao, Tao Cui, Arumugam Nallanathan, Chintha Tellambura
• Keywords: Blind Joint Maximumlikelihood, Discrete Cosine, TCOM 2008, Traditional Discrete Fourier