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The high-precision positioning of obvious target for the image edge, we usually use line diffusion function model, when we generally use normal function, in this paper, we use simple arc tangent function instead of normal function for positioning the image edge, the mathematical model of this method is simple and has fast calculation. getting the gray value of the phase as observations for adjustment...
Since the method of using GTEM cell to do EMI measurement is put forward, it gradually received the testers' attention because of the advantages of GTEM cell. In this paper, HFSS software is used to simulate a GTEM cell of classic structure, and the reliability of simulation is conformed from two aspects. The two aspects are characteristic impedance and output power of GTEM cell. The experiment result...
The paper can demonstrate that the directivity test of RFID tag using GTEM cell has a good agreement with the test in free space, by theoretical analysis and mathematical calculation. At the same time, we do the directivity test with GTEM cell and UHF RFID tag, and can finally verify the feasibility of GTEM cell in doing directivity test, and raise a new low-cost, efficient testing method for the...
This paper demonstrates six possible cooperative relays from the procedure of Decode-and-Forward relay, and designs their soft combining schemes accordingly. All these schemes are designed for LTE-A system, by the principle of being compatible and making minimum modification to the current LTE system. Among the co-relay schemes, some of them are with high forwarding efficiency, and some of them are...
Network coded retransmission without soft combining (NC ARQ) has been studied for multicast or for multiple unicast. Some papers also mentioned that the soft combining with NC information will be the proper way to improve the receiving performance. However, some papers didn't mention the detailed combining procedure, and most papers on soft combining used extrinsic information for iterative decoding...
This paper describes a high precision 3rd-order curvature-compensated bandgap reference compatible with a standard 0.5-mum CMOS process. Utilizing the voltage to current converter and the voltage current characteristic of base-emitter junction to realize VTln(T) compensation, the proposed bandgap reference can implement high-order compensation. A temperature coefficient (TC) of 2.5 ppm/degC is realized...
A mathematic model has been presented for a high speed liquid jet penetration into soft solid by a needle-free injection system. The model consists of a cylindrical column formed by the initial jet penetration and an expansion sphere due to continuous deposition of the liquid. By solving the equations of energy conservation and mass conservation, the penetration depth and the radius of the expansion...
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