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To address the problem of direction of arrival (DOA) of fast moving target in accelerated scenario, a new DOA estimation algorithm based on the generalized almost-cyclostationary processes analysis is proposed. First, the property of fast moving target signal with a constant relative acceleration is discussed. We reveal that the received signal arises cyclostationarity even for the accelerated target...
The ocean bio-physical co-variability and its response to climate change have received increasing attention with the accumulation of satellite ocean data sets. Most of the present studies focus either on regional ocean or short time span, lacking a systemetic study of the co-variability of bio-physical parameters in the Pacific. Based on the satellite datasets and re-analyzed datasets from 1997 to...
Using the monthly averaged NOAA PSD optimal interpolation sea surface temperature (OISST) data from December 1981 to April 2009, this paper adopted the empirical orthogonal function and power spectral density to analyzing the SST fields' spatial-temporal structure of El Niño1, El Niño2, El Niño3 and El Niño4, respectively. The first modal analysis has shown that: (1) time coefficients of El Niño1,...
The mismatch of current sources is caused by the circuit error and the process variation. Introducing the channel length modulation λ to the Pelgrom model for variation analysis, we describe a new ΔI/I model of current sources. To make it clear what variation parameter influences the mismatch, we implemented a test chip on 90nm process technology, where we can collect the characteristics variation...
Using the monthly averaged NOAA AVHRR sea surface temperature data from January 1985 to December 2008, this paper extracted the monthly averaged position of western Pacific warm pool eastern edge in El Nino, La Nina and normal months. The averaged position during normal months is seasonal distribution with the shape of `****', in which there were three inflexions locating about along 9°N latitude,...
With the rapid industrialization and urbanization, more and more solid have been emitted into the Pearl River Estuary. The suspended sediment concentration is one of the most important water quality parameters. With in-situ optical data and suspended sediment data collected on four cruises from 2004 to 2006 in the Pearl River Estuary, analysis shows that with the increasing of the total suspended...
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