Design of OFDM Timing Synchronization Based on Correlations of Preamble Symbol
| Autor: | Liu Tongling, Ma Yunsi, Chaoxing Yan, Lingang Fu, Zhou Sanwen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Complex conjugate
Orthogonal frequency-division multiplexing 020206 networking & telecommunications 020302 automobile design & engineering 02 engineering and technology Preamble Synchronization 0203 mechanical engineering Metric (mathematics) Computer Science::Networking and Internet Architecture 0202 electrical engineering electronic engineering information engineering Electronic engineering Polar coordinate system Multipath propagation Computer Science::Information Theory Mathematics Communication channel |
| Zdroj: | VTC Spring |
| DOI: | 10.1109/vtcspring.2016.7504190 |
| Popis: | In this paper, we propose a timing synchronization method for orthogonal frequency division multiplexing (OFDM) systems by exploiting the averaged differential correlations of preamble symbol. For the designed simple preamble whose second half-symbol is the complex conjugate of the first one in the time-domain, the proposed timing synchronization method has an impulse-shaped timing metric. Simulation results indicate that the proposed method improves the timing estimate mean square errors (MSE) performance remarkably than conventional methods at low signal-to-noise ratio (SNR) in multipath fading channel. To reduce the computation complexity of the proposed method, we suggest modifying the timing estimation by simplifying the amplitude information of OFDM signals in polar coordinates. |
| Databáze: | OpenAIRE |
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