Joint Synchronization and Channel Estimation for MIMO-OFDM Systems Using EM Algorithm

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Provided by: International Publisher for Advanced Scientific Journals (IPASJ)
Topic: Software
Format: PDF
MIMO-OFDM systems are very sensitive to synchronization errors, especially the Carrier Frequency Offset (CFO).In order to detect the transmitted signal from each transmit antenna with data detection, and the authors should estimate an accurate Channel State Information (CSI) at the receiver. Therefore synchronization and channel estimation are challenging tasks in mobile MIMOOFDM communication systems. A joint carrier frequency synchronization and channel estimation scheme is proposed for MIMO-OFDM system. The carrier frequency synchronization and channel estimation are performed iteratively via the Expectation-Maximization (EM) algorithm using an OFDM preamble symbol. Simulation results present that the proposed scheme achieves almost ideal performance.
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