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A sparse-training-sequence-aided orthogonal frequency division multiplexing system is proposed to enable channel estimation and data detection without being affected by carrier frequency offset (CFO) effect. With the aid of the sparse training sequence, an approximate maximum likelihood estimation on CFO effect and channel response is developed to retrieve the CFO and channel response information...
The geometric sequence has been shown feasible for large carrier frequency offset (CFO) acquisition, while the modulatable orthogonal sequence (MOS) has been used to assist joint time synchronization and channel estimation in orthogonal frequency-division multiplexing (OFDM) systems. This paper first proposes a method to make an MOS partially geometric. Consequently, the partially geometric MOS can...
Recently, the advantages of the discrete cosine transform (DCT) based orthogonal frequency-division multiplexing (OFDM) have come to the light. We thus consider DCT- OFDM with non-circular transmission (our results cover circular transmission as well) and present two blind joint maximum- likelihood frequency offset and phase offset estimators. Both our theoretical analysis and numerical comparisons...
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