Ming Ruan

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—This paper studies fractional carrier frequency offset (CFO) estimation for orthogonal frequency-division multiplex-ing (OFDM) systems. In the IEEE 802.16 (WiMAX) standard, a training symbol structure with three highly correlated but not identical segments is specified. The existing CFO estimation methods require the segments in the training symbol to be(More)
—In orthogonal frequency division multiplexing (OFDM) systems, coarse frame timing can be acquired from one or more training symbols preceding every OFDM burst. The existing literature studied the case where there was only one training symbol consisting of identical segments. We generalize the timing synchronization methods to take advantage of multiple(More)
— This paper proposes a high-performance and relatively low-complexity approximated maximum likelihood esti-mator (MLE) for carrier frequency offset (CFO) in practical orthogonal frequency multiplexing (OFDM) systems, where the preamble has repetition structure in time domain, null subcar-riers are allocated at two ends of the frequency spectrum, and the(More)
The cooperation of ligustrazine (LI) and borneol was proved to be much better than each of them in treating cerebral ischemia. However, the mechanism of their synergic therapy is unclear till now. Moreover, whether their cooperation brought different degrees of protection among different brain regions was also unclear. In the present study, the effects of(More)
This paper presents a novel design method for a spatially interpolated beamformer. By separating the design of the physical antenna array and the digital signal processors, we remove the restriction on the half-wavelength spacing requirement of a uniform linear array to achieve higher efficiency. To be more realistic, however, we fix the element positions(More)
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