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Traditional clustering algorithm can't deal with non-linear fuzzy and boundary problem. This paper provides a rough fuzzy kernel clustering algorithm. The algorithm firstly using kernel function map input space to high-dimensional space, make the space can be partitioned linearly. Then it using rough and fuzzy theory computes the membership grade difference between sample data and cluster center....
In this paper, a novel tunable microwave bandpass filter (BPF) based on liquid crystal (LC) technology is presented. For ease of supplying ac voltages, the proposed filter is achieved by particular configuration schemes with low cost inverted-microstrip structure. Two open-circuited stubs are placed inside a meander loop resonator so as to form quarter wavelength resonators, which is good to keep...
In this paper, a novel antenna with vertical polarization and low profile in vertical direction was designed base on substrate integrated waveguide (SIW) and Electromagnetic Band Gap (EBG) structure. The radiation performance and the standing-wave ratio (SWR) were optimized via stepped transition structure. The gain and the front-to-back ratio were increased via the Electromagnetic Band Gap structure...
This paper focuses on the correlation algorithm to realize high-resolution microwave staring correlated imaging (MSCI) in condition of large imaging area. Firstly, the imaging model applied in remote sensing is established, and the reduction of resolution caused by large imaging area is analysed. To solve the problem, we use multigrid (MG) method to solve the imaging equation in different scales,...
In this paper, a kind of leaky-wave beam scanning antenna based on NRD waveguide was studied. The structure of NRD waveguide is changed by replacing dielectric strip with magnetic biased ferrite material. Radiation is formed slotting one of the metallic plates sandwich the ferrite strip. When the biased magnetic is turned, the beam can sweep in the NRD propagation plate.
In this paper, a new structure based on square ring and three-pole loading are presented. The performance of the new Frequency Selective Surface (FSS) structure was studied. The feasibility of the application of the FSS was discussed. The wave-transparent rate through this structure is given with plane-wave incidence. The results of different incidence angles of the plane wave were compared. The stability...
An ultra-wideband suspended stripline (SSL) structure high-pass filter with multi-stubs is proposed. A quasi-lumped approach is used to design the filter based on a 7th-order Chebyshev high-pass filter. For the designed high-pass filter, from 5.7 to 30 GHz, the insertion loss is less than −0.5 dB and the return loss is better than −11 dB. From 5.7 to 20 GHz, the return loss is greater than −17 dB,...
This paper proposes a novel crosstalk analysis model applicable to closed ring-based optical network-on-chip. In order to show how this model is used, an example of analyzing crosstalk noise and SNR in a generic closed ring-based ONoC is studied.
This paper presents a dual-band bandpass compact low temperature co-fired ceramic (LTCC) filter using folded resonators. The passband of the proposed filter centred at 2.45 GHz and 5.2 GHz, and three transmission zeroes are generated. It is easy to couple the Π-type resonators of the proposed structure compared with the planar form. The filter is miniaturized by using the LTCC multilayers structure,...
In this paper, considering the worst case channel uncertainty, we propose a robust secure design with cooperative jamming strategy in decode-and-forward relay network. Practically, it is difficult for the full-duplex model to eliminate the self-interference and experience indicates that full-duplex schemes may not always outperform half-duplex schemes. Thus, we employ the hybrid full/half-duplex protocol...
In this paper, a Coplanar Waveguide (CPW) delay line (16λg and 32λg @ 34.2GHz) is proposed, with thin film technology. Compared with other structures, it's more easily to achieve Simulation Index, a smaller dispersion and VSWR, strong anti-interference ability, light-weight; 12.2×16.5×0.254 mm3 for 16λg and 14×22.6×0.254mm3 for 32λg. The final simulation results: the Insertion Loss (16λg) is less...
As the purpose of improving scheduling efficiency to create a tower parking system model. To analyze the different speed variations on the lifting process of new sliding equipment. The mathematical models of different operating strategies are created. To simulate different access process that is based on the queuing theory. Then by comprehensively analyzing the experimental results of MATLAB simulation,...
Intensive narrowband radio frequency interference is a problem that very high frequency (VHF)/ultra-high frequency (UHF) radar must solve in the work. This paper proposes a sine wave parameter estimation method of local refinement search in frequency domain. It can estimate the frequency of narrowband radio frequency interference(RFI) by using fast Fourier transform(FFT) and chirp transform algorithm...
In this paper, a 220 GHz monolithic power amplifier (PA) is presented by using InP heterojunction bipolar transistor (HBT) technology. A cascode constituted by common emitter and common base InP HBTs is employed due to its superior high-frequency maximum stable gain (MSG). The result shows that a two-stage monolithic microwave integrated circuit (MMIC) power amplifier using an emitter width 0.5 um...
This paper investigated the design of an alumina sapphire output window for 210GHz gyrotron. The design of output window for 210GHz gyrotron has been carried out by using the tool MATLAB software. The simulation results indicated the bandwidth of the window. The reflection is lower than −20dB can be optimized to 12GHz at a central frequency of 210GHz. Benefit from the wide bandwidth of the window;...
A new sparse frequency diverse multiple-input multiple-output (FD-MIMO) radar image reconstruction technique is proposed for off-grid targets in the Compressed sensing framework. We broaden the scope of sparse total least-squares with structured form (SS-TLS) capitalizing on prior information available about the perturbed matrix, and FoCal Underdetermined System Solver (FOCUSS) has low-computation...
Latency matrix completion is an important foundation for the optimizations of latency-sensitive applications. But in full decentralized environments, the latency matrix is always incomplete. Owing to the low-rank property of this matrix, this paper introduces a slow-start strategy and then proposes a novel algorithm to complete the matrix approximately with low computation cost. At first we estimate...
Through-Wall Imaging Radar (TWIR) can reconstruct targets which are concealed behind the wall, so it is highly desired in antiterrorism, hostage situations and other fields. To detect, track and locate personnel targets behind the wall, the TWIR must have the ability of high data frame rate and fast imaging speed. In this paper, we analyze the imaging algorithm for two dimensional multiple input multiple...
Conventional dodging-and-burning in Reinhard's photographic algorithm often suffer from halo artifacts or a loss of details, which is due to the failure of distinguishing the regions with few strong edges from the ones with lots of weak details during the local mapping. In this paper, we propose an edge-based adaptive support region computing algorithm for local tone mapping. The proposed algorithm...
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