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Radio frequency interference (RFI) has becoming a seriously limitation in the retrieval of geophysical parameters from the measurements of microwave radiometers. In this work, a novel RFI localization approach is presented here to improve the computationally complexity by using virtual arrays and direction of arrival (DOA) estimations techniques. The proposed RFI localization method utilizes the underlying...
Most of state-of-the-art packet classification algorithms employ heuristics to trade off between classification speed and memory usage. However, intelligent heuristics often result in complex data structures in algorithm implementation. This brings difficulties to the deployment and optimization of packet classification algorithms. In this poster, a structural compression approach is presented for...
In order to improve the efficiency of soybean genetic variation information, robust relationship inference in GWAS parallel algorithm is raised in this paper. This algorithm is adopted serial and parallel hybrid structure. Each row of data is parallel processed by OpenMP technique. The I/O processing and the accumulate processing are treated as a serial. Finally, the serial and parallel algorithms...
A semi-analytic approach for the electromagnetic analysis of large numbers of Through silicon vias (TSV) is presented in this paper. The method is based on cylindrical mode expansion method. The scattering and multi reflection effects between the vertical cylindrical vias are considered by expanding the electromagnetic waves surrounding the vias by cylindrical waves. As the method fully captured the...
We investigate technologies for SDM transmission using few-mode fibers, including inline erbium-doped fiber amplifiers, and wavelength-selective switches and gain flattening filters based on spatial light modulators.
A semi-analytic approach for the electromagnetic analysis of large numbers of Through silicon vias (TSV) is presented in this paper. The method is based on cylindrical mode expansion method. The scattering and multi reflection effects between the vertical cylindrical vias are considered by expanding the electromagnetic waves surrounding the vias by cylindrical waves. As the method fully captured the...
Discrete Cosine Transform (DCT) plays a significant role in digital signal processing, especially in various international compressing standards, such as JPEG (Joint Photographic Experts Group), MPEG4 (Moving Pictures Expert Group), and H26X. Due to its high computational complexity, fast DCT algorithms have been widely studied in recent years. This paper highlights a novel approach to calculate DCT...
We propose multicore fibers with linear array configurations for optical interconnect applications. We discuss fiber design considerations and present actual 1×4 and 2×4 fiber results.
Based on the idea of "software is instrument" and the previous "Sonic Testing Instrument for Bomb Chamber Volume" and using the exclusive developing software of Virtual Instrument, we had designed the "Audio Frequency Detection Instrument of Bomb Chamber Volume based on Labview" in this thesis. In the system, we realize intelligent control, real time collection of signal...
A 2*2 antenna array constructed by using a new substrate integrated waveguide (SIW) cavity-backed slot antenna as its single element is proposed in this paper. Comparing to that of a single antenna element, the antenna array gain has been improved of 5.8 dB. The proposed antenna array has a lot of advantages, such as low profile, light weight, easy fabrication with low cost and convenient integration...
Long time integration is a common work mode for multiple-input multiple-output (MIMO) radar. In this mode, the accumulation effect is seriously affected by range migration. To solve this problem, we derive an expression, which describes how the accumulation output changes with the target velocity, bandwidth, and other factors, based on the MIMO radar moving target echo model. This expression quantifies...
A new method for estimating direction of arrival (DOA) of the strong and weak signals is proposed in the presence of array gain and phase mismatch. Firstly, the array gain and phase mismatch is estimated using the norm of the error vector between the practical steering vector and the theoretical vector of the strong signal, and then the data covariance matrix is calibrated. Secondly, the new seek...
Uniform circular array (UCA) based on coupled oscillators is introduced for new phased array. A phase model of the array is proposed and a set of nonlinear phase differential equations are studied. Linear phase distribution among UCA is achieved using York's method for coupled oscillators array, causing error in beam scaning of coupled oscillators UCA, and the inter-element phase shift that can be...
This paper proposes an efficient direction-of-arrival (DOA) estimation algorithm for wideband signals from data collected using two sensors. Like the traditional wideband methods, this algorithm first decomposes wideband sources into narrowband bins. At each frequency bin, the cross-correlation between sensors is estimated to construct a Toeplitz matrix, which contains all angle information. Thus...
It is compute-intensive to evaluate the probability of an observation sequence on a hidden Markov model. Some fast algorithms exit, the forward-backward procedure is the most popular one among them. The forward-backward procedure can save much computation, but its time complexity is N2T, in other words, there is a high computational complexity in the algorithm. In this paper, we present a parallel...
Direction-of-arrival (DOA) estimation for ultra wideband (UWB) array has received considerable attention in high-precision UWB localization. A novel beamspace-based DOA estimation method for UWB signals is proposed in the paper by designing multiple constant beamwidth beamformers. The bandwidth of UWB signal is decomposed into several narrowband bins. The array response vectors at different frequency...
Recent years, technologies for new energy have developed rapidly since the energy crisis and the environmental pollution got worse. And the solar energy generation technology tends towards the stage of a large number of applications in engineering from the research stage. This paper designed a grid-connected PV system firstly, then introduced the operation principle of the various parts as well with...
Through the wall imaging (TWI) is a difficult but important task for both law enforcement and military missions. Getting information on both the internal features of a structure and the location of people inside is playing an important role in many fields such as anti-terrorism, search and rescue hostage, and barricade situations. Up to now, many researchers have developed diverse experimental systems,...
Dielectrophoresis (DEP) is an effective microelectronic technique for trapping and manipulating biological particles in a microfluidic environment, which relies on the highly asymmetric electric field gradient created by the microelectrodes. Here we demonstrate an AC DEP technique for single-bacteria trapping using nanoelectrode arrays (NEAs) in a "points-and-lid" configuration. The NEA...
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