S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Journal Papers (저널논문_전기·정보공학부)
Residual Frequency Offset Compensation Using the Approximate SAGE Algorithm for OFDM System
- Lee, Jong-Ho; Kim, Seong-Cheol
- Issue Date
- IEEE Trans. Commun., vol. 54, no. 5, pp. 765-769, May 2006
- carrier frequency offset (CFO),; orthogonal frequency-division multiplexing (OFDM); space-alternating generalized expectation-maximization (SAGE)
- In this letter, we propose an iterative detection scheme in the presence of residual frequency offset (RFO) for orthogonal frequency-division multiplexing systems using an approximate application of the space-alternating generalized expectation-maximization (SAGE) algorithm. In the proposed scheme, the expectation step intends to divide the received signal into the desired signal and the interference signal. In the maximization step, the desired signal is used to estimate required parameters (i.e., RFO, data symbols, and channel state information) sequentially. Simulation results present that the proposed scheme shows almost ideal performance as long as the normalized RFO value is within 0.2.
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