green laser pointer

There is no need to get the special training to operate    cell phone jammer    . First, find the matrix equation to obtain the use of polynomial coefficients, the second is based on the roots of polynomials needed to solve the pole information. In the polynomial method, a method is of more concern Prony method. Prony method is a French physicist, proposed by Prony in 1879, which this method is applied to the gas equation of state data fitting. Mittra, who applied Prony method to extract the transient signal poles, but in the specific practice Prony method is found that there were shortcomings, its poor noise immunity. Later, other scholars Kumaresan Prony method for effective improvement, in order to enable it to better noise suppression, the calculation of the order is not limited to the requirements.    cell phone blocker can run and work well after switching on and pressing the button. Subspace rotation method is different from the Prony method, a new calculation method, its basic idea is to use the relationship between the matrix to solve the generalized eigenvalue signal, the signal pole and then solve the problem. In 1979, Princc for the anti-noise problem, a singular value decomposition method, this is an important breakthrough. In practice proved that it is indeed anti-noise ratio improved Prony method.

Background of    cell phone jammer     has something to do with use of cell phone in the meeting room, examination room, petrol station, gas station, court, church, military place and so on where using of cell phone is forbidden.This section will list various algorithms in theory, to achieve performance on the similarities and differences, in order to reflect improvements in this paper, the superiority of Matrix Pencil Method algorithm. In order to simulate the signals more close to real signals, the algorithm uses the principle of minimum average error. Find the smallest part of the problem solving nonlinear equations, in particular the calculation more difficult, but easier to find the minimum. Therefore, the demand Σ e (n) for the sake of the smallest problem is transformed by solving equation (3-14) of the equation, the coefficients of the characteristic equation can be obtained.The emission power of   cell phone blocker is 30±3dbm.

In the shielding design should be based on the specific requirements of the shielding effectiveness of shielding materials and occasions to choose. In the selection of shielding materials should follow the following principles: (1) When the frequency of the external electromagnetic interference is relatively high when the high conductivity with low resistance of the material. (2) when outside interference is relatively low frequency electromagnetic fields, it should use the high permeability of the material. (3) When asked what the conditions for the electromagnetic field must have a good shielding effect, you need to select from a variety of materials consisting of layers of metal shielding. The ambient temperature of    cell phone jammer     is -25 ― +60°C. The following shielding materials commonly used in classification.