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Estimation of CFO and Channels in Phase-Shift Orthogonal Pilot-Aided OFDM Systems with Transmitter Diversity
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| We present a CFO estimation algorithm and an associated channel estimation method for broadband OFDM systems with transmitter diversity. The CFO estimation algorithm explores the TD structure of the transmitted symbols carrying pilots and data, relying solely on the data component present on the symbols to estimate the CFO, thus avoiding additional overhead like training symbols or null subcarriers. An intermediate output of the CFO algorithm provides an easy-to-get initial CIR estimate that will be improved with the utilization of a TD LMMSE filter. The feasibility of the investigated methods is substantiated by system simulation using indoor and outdoor broadband wireless channel models. Simulation results show that the joint algorithms provide a near optimal system’s performance. | 475.53 KB | Adobe PDF |
Orientador(es)
Resumo(s)
We present a CFO estimation algorithm and an associated channel estimation method for broadband OFDM systems with
transmitter diversity. The CFO estimation algorithm explores the TD structure of the transmitted symbols carrying pilots and
data, relying solely on the data component present on the symbols to estimate the CFO, thus avoiding additional overhead like
training symbols or null subcarriers. An intermediate output of the CFO algorithm provides an easy-to-get initial CIR estimate
that will be improved with the utilization of a TD LMMSE filter. The feasibility of the investigated methods is substantiated by
system simulation using indoor and outdoor broadband wireless channel models. Simulation results show that the joint algorithms
provide a near optimal system’s performance.
Descrição
Article number 436756
Palavras-chave
Channel Estimation Carrier Frequency Offset Cyclic Prefix Channel Impulse Response OFDM System
Contexto Educativo
Citação
Ribeiro, C., Gameiro, A. Estimation of CFO and Channels in Phase-Shift Orthogonal Pilot-Aided OFDM Systems with Transmitter Diversity. J Wireless Com Network 2009, 436756 (2009). https://doi.org/10.1155/2009/436756.
Editora
Springer Nature