121 results about "Stochastic distribution" patented technology

The method is for estimating the fading coefficients of a plurality of transmission channels on which signals to be sent, generated as a function of a sequence of symbols, are transmitted according to a particular modulation, e.g. AM-PSK modulation. The fading coefficients are estimated by using estimations of the transmitted symbols obtained in advance, thus obtaining DC components of the received signal by coherent demodulation locked to the phases of the transmitted AM-PSK signals, and processing these DC components. The method may not require the choice of a stochastic distribution model of the channel fading, thus it remains efficient even when the channel characteristics vary significantly. Moreover, the method works correctly even if the received stream is disturbed by inter-symbolic interference (ISI) and / or by multi-path fading.

The invention discloses a three-dimensional imaging method and a device utilizing a planar lightwave circuit. The three-dimensional imaging method includes that coherent light emitted from coherent light source is converted into a two dimensional point light source array; the position of every point light source in the two dimensional point light source array is randomly distributed; three-dimensional images are discretized into a large amount of vexel; the vexel is divided into a plurality of groups from high to low according to the brightness; a phase regulating amplitude of the point light source is calculated according to the distance between every point light source and every vexel of every group to enable the lightwave from every point light source to be in the same phase when reaches the vexel; every point light source is accumulated as a complex amplitude regulation amplitude for generating every vexel; and an amplitude regulator and a phase regulator of every point light source are driven to generate every group of vexel based on constructive interference. The imaging device is formed by coherent light source, the planar lightwave circuit, a conductive glass front panel and a back driving circuit. The three-dimensional imaging method and the device utilizing the planar lightwave circuit are capable of being widely applied to the fields of three-dimensional display of a computer and a television, three-dimensional human-machine exchange, robot vision and the like.

The invention discloses an anti false method by using texture. The features are as follows. There are a lot of fibers in selected area; all fibers possess character of random distribution. Only one or few characters of random distribution are chosen as a carrier of anti false informatino to be stored on computer data for user to query through comunication method, so as to confirm whether the product is true or false. The characters chosen can be coordinate of an end point of one fiber or quantity of fibers in any local area for example. Although only one or few characters are chosen, since not knowing which one being chosen, falsifier must copy all distributed fibers in selected area accurately.

A method and means to use randomly arranged fibers assembled together in a bundle that is capable of conveying images from an inaccessible location to a more accessible, convenient or safe location for viewing. Allows for mixing fibers of different diameters. Random distribution of fibers decreases the packing fraction, offering in exchange easiness of manufacturing and decrease in production cost. System can be also used for display units, including computer monitors, home TV, movie theatres, public display announcement boards, as airport, trains stations, highway instructions and billboard advertising. As display units, random assembled fibers are organized at the display end at the display shape, usually rectangular, from where light is emitted towards the viewer. At the illuminating end, light enters the individual fibers from multicolored lasers or other light sources which are controlled by single or multiple video boards and computers.

The present invention relates to one kind of product anti-fake label made of material with some texture characteristics. The randomly formed figure, color and amount in the marker are used as the anti-fake information and coded as the anti-fake data stored in the data base of computerized identification system while being printed in anti-fake marker. The consumer can chedk the figure and color inthe label via comparison with the code to verify the truth of the commodity and may also check the codes in the marker via comparison with those in computer data base to verify the truth of the commodity through modern communication means.

The invention is related to transmitting / receiving method in quasi-orthogonal time space group code, receiver and transmitter and corresponding comm. system. Random rotation matrix is obtained through Graham-Schmitt orthogonalized decomposing plural gauss random square matrix. After using multiplication between random rotation matrix and symbolic vector of planisphere, the transmitting terminal carries out encoding quasi-orthogonal time space group code so as to make new planisphere possess characteristic of random distribution. Thus, interferences among multiple antenna symbols at transmitting end are distributed evenly. Moreover, distribution of probability density in high power interference segment is smaller relatively so as to raise performance of system in high SNR. Accordingly, all possible symbolic vectors of planisphere at receiving end are carried out rotation same as transmitting end randomly and then maximum likelihood decoding is carried out.

The present invention is a MEMS-based two-phase LHP (loop heat pipe) and CPL (capillary pumped loop) using semiconductor grade silicon and microlithographic / anisotrophic etching techniques to achieve a planar configuration. The principal working material is silicon (and compatible borosilicate glass where necessary), particularly compatible with the cooling needs for electronic and computer chips and package cooling. The microloop heat pipes (μLHP™) utilize cutting edge microfabrication techniques. The device has no pump or moving parts, and is capable of moving heat at high power densities, using revolutionary coherent porous silicon (CPS) wicks. The CPS wicks minimize packaging thermal mismatch stress and improves strength-to-weight ratio. Also burst-through pressures can be controlled as the diameter of the coherent pores can be controlled on a sub-micron scale. The two phase planar operation provides extremely low specific thermal resistance (20-60 w / cm2). The operation is dependent upon a unique micropatterened CPS wick which contains up to millions per square centimeter of stacked uniform micro-through-capillaries in semiconductor-grade silicon, which serve as the capillary “engine,” as opposed to the stochastic distribution of pores in the typical heat pipe wick. As with all heat pipes, cooling occurs by virtue of the extraction of heat by the latent heat of phase change of the operating fluid into vapor.In the cooling of a laptop computer processor the device could be attached to the processor during laptop assembly. Consistent with efforts to miniaturize electronics components, the current invention can be directly integrated with a unpackaged chip. For applications requiring larger cooling surface areas, the planar evaporators can be spread out in a matrix and integrally connected through properly sized manifold systems.

The invention provides a continuous random measurement matrix-based continuous variable quantum key distribution method. The method comprises the following steps of first, Gaussian modulation of a coherent state by a sending end, wherein the sending end prepares true random numbers of Gaussian distribution and prepares the coherent state, and encodes the coherent state through strength and a phasemodulator according to an element of a Gaussian random number set; second, transmission of a Gaussian signal, wherein the sending end transmits the encoded coherent state signal to a receiving end through a quantum channel; third, demodulation of a continuous random measurement matrix by the receiving end, wherein the receiving end prepares a plurality of binary variables that are distributed continuously and randomly; and fourth, data consultation and privacy amplification. Through adoption of the method, matrix comparison is prevented so that some original data strings are not discarded, further, the method is easy to realize in the prior art. Due to use of continuously distributed phase angles, requirements on performance of a digital-analog converter and a phase modulator are relatively lowered, so that engineering is easy to realize.