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A Residual Frequency Offset Compensation Scheme for OFDM System via SAGE Algorithm
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- Authors
- Issue Date
- 2005-09
- Citation
- VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, vol. 1, pp. 573-577, 2005
- Abstract
- In this paper, we propose an iterative detection
scheme in the presence of residual frequency offset (RFO) for
orthogonal frequency-division multiplexing (OFDM) system
using the space-alternating generalized expectation-maximization
(SAGE) algorithm. In the proposed algorithm, the expectation
step intends to remove the inter-carrier interferences (ICI) due to
RFO in the received signals. Then, the maximization step is
utilized to estimate the required parameters (i.e. RFO, data
symbols and channel state information) using the ICI canceled
signals. Simulation results present that the proposed algorithm
shows almost ideal performance as long as the normalized RFO
value is within 0.2.
- Language
- English
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