Estimation of CFO and Channels in Phase-Shift Orthogonal Pilot-Aided OFDM Systems with Transmitter Diversity

Ribeiro, Carlos; Gameiro, Atílio

http://hdl.handle.net/10400.8/12831

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Estimation of CFO and channels in phase-shift orthogonal pilot-aided OFDM systems with transmitter diversity.pdf	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	Download

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Authors

Ribeiro, Carlos

Gameiro, Atílio

Ribeiro, Carlos

Abstract(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.

Description

Article number 436756

Keywords

Channel Estimation Carrier Frequency Offset Cyclic Prefix Channel Impulse Response OFDM System

URI

http://hdl.handle.net/10400.8/12831

Citation

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.