33results about How to "Increase encoding capacity" patented technology

The invention provides an optical label based information interaction system and method, and the system and method are high in directionality, long in identification distance and large in information capacity. The information comprises the information coding optical label, a data server, a mobile terminal and a wireless communication network, wherein the data server provides information, the mobile terminal decodes the information and is connected with the data server, and the wireless communication network is connected with the mobile terminal and the data server. the optical label comprises a signal unit and a positioning identification; the mobile terminal comprises an image collector and an image processing module, the image collector collects a coded image of the optical label, and the image processing module decodes the coded image; and the mobile terminal is connected with the data server via wireless communication network according to decoding information and makes information interaction. The method comprises the following steps that 1) supply information is coded; 2) the mobile terminal is used to decode the image to obtain demand information transmitted by the optical label; and 3) after decoding, interaction between demand information and supply information is realized.

The invention provides a method and device for deterministic secure quantum communication based on EPR pairs and single photons. A simple local area unitary operation is carried out on the first particle of each prepared EPR pair, and transmitted secret messages can be encoded; a message receiving end completes interaction between two legal users through auxiliary classic information, and the transmitted secret messages can be decoded by executing Bell basis measurement. The method is high in encoding capacity, high in transmission efficiency, simple in operation and easy to achieve.

The invention discloses a matrix type two-dimensional code. An image of the matrix type two-dimensional code is formed by arranging a plurality of color blocks in a rectangular array mode, a circle ofcolor blocks at the edge of the image form a positioning area, and the color blocks in the image form a coding area. The positioning area comprises an L-shaped edge and a positioning edge opposite tothe L-shaped edge. The matrix type two-dimensional code is characterized in that the the colors of the color blocks comprise at least three colors of eight colors including three RGB standard colors,four CMYK standard colors and white color, and the positioning edge is formed by alternately arranging the color blocks which are filtered by any one color channel in RGB and then are black and the color blocks which are filtered by the same color channel and then are white. On the basis of an original Datamtrix data structure, six colors and original black and white two colors are added to forma new color channel to construct the color two-dimensional code, the coding capacity is improved to 3 times of the original coding capacity, and meanwhile the color two-dimensional code is kept compatible with an existing black and white Datamtrix coding system to the maximum extent.

The invention discloses a four-photon entangled W state-based super-dense coding method for quantum signaling. The problems of low signaling coding capacity, low efficiency and poor security in a quantum communication process are mainly solved. The method is implemented by a process comprising the following steps of preparing four-photon (A, B, C and D) entangled W state as the quantum signaling, and transmitting the photons C and D to a receiver by using a transmitter; performing unitary transformation on the photons A and B to obtain 16 new quantum states; forming an orthogonal basis by using the 16 new quantum states; coding the new quantum states respectively, and sequentially transmitting photons A' and B' obtained by the unitary transformation to the receiver; and after the receiver receives the photons A' and B', arbitrarily selecting a measurement basis from the orthogonal basis, and performing joint measurement on the photons A', B', C and D to measure a new quantum state to finish coding. The method has the advantages of high coding efficiency, high capacity and high security, and can be used for a signaling system for quantum mobile communication.

The invention relates to a surface acoustic wave radio frequency electronic tag with large data capacity, which comprises a piezoelectric substrate, an interdigital transducer and a distribution-type reflection grating array, wherein the interdigital transducer and the distribution-type reflection grating array are arranged on the piezoelectric substrate, and is characterized in that a second interdigital transducer is arraned between propagation paths of a first interdigital transducer and a first distribution-type reflection grating array; a second distribution-type reflection grating arrayis arranged between pulse intervals of encoderless interval of a pulse signal of the first distribution-type reflection grating array, and the second distribution-type reflection grating array is used for forming a surface acoustic wave electronic tag for another frequency together with the second interdigital transducer. On the basis of single interdigital tranducer and single distribution-type reflection grating array structure, the electronic tag utilizes the acoustic wave propagation path and the encoderless interval of the pulse signal to add a second group of another frequency interdigital transducer and reflection grating array; and on the basis that the size of the radio frequency electronic tag is not increased, the coding capacity of the electronic tag is greatly enlarged.

A two-dimensional dot matrix barcode encoding method comprises: forming a plurality of coordinate calibration blocks, a plurality of data storage blocks and a direction indication block by filling code points into the virtual code point storage blocks, wherein the plurality of coordinate calibration blocks are filled with only one code point located in the center of the virtual code point storage block; the direction indication block is filled with at least two code points, only one code point being located in the center of the virtual code point storage block; the plurality of coordinate calibration blocks and the direction indication block are separated from each other and distributed among the plurality of data storage blocks; and code points filled in the plurality of data storage blocks are used to store data information, where M≥4, N≥4, N≥4, and M and N are both even numbers.

The invention discloses a high-capacity and metal-insensitive double layer chip-free tag antenna, which is used for coding articles in a chip-free tag system. The high-capacity and metal-insensitive double layer chip-free tag antenna comprises two layers of dielectric substrates, a split ring resonator and a spiral resonator, wherein the split ring resonator consists of three coaxial rectangular split rings, and each two adjacent split rings are connected to each other through a pair of upper and lower short connection lines; the spiral resonator consists of nine spiral bodies with the same size; each spiral body is made of copper strips through staggered screwing from inside to outside; and the split ring resonator and the spiral resonator are distributed at different heights in the same vertical plane. The tag antenna disclosed by the invention is a magnetic antenna, and is insensitive to different dielectric substrates to which the antenna is adhered. The tag antenna achieves the metal-insensitive characteristics by using a double layer structure that uses the intermediate layer to separate the air. Meanwhile, as three resonant frequency points can be increased when one unit structure is increased, the tag antenna disclosed by the invention can achieve very high coding capacity.

The invention discloses an optical coding library. The optical coding library comprises carriers with N sizes, wherein N is greater than or equal 2; each carrier comprises a subject part and object parts which are connected with the subject part; the subject part and at least one of the object parts comprise a fluorescent element; the central emission wavelength of the fluorescent element on the subject part is different from the central emission wavelength of the fluorescent element on each object part. The invention also discloses a preparation method of the carriers in the optical coding library, and the application of the carriers and the optical coding library. The optical coding library has ultrahigh coding capacity, and has the characteristics of high coding accuracy and high repeatability in application.

The invention discloses a quantum key distribution method based on single photon superdense coding. The method comprises the following steps that a party A prepares a photon state which is randomly inan R ground state, carries out deflection operation on the photon state and then sends the photon state to a party B; the party B carries out the deflection operation on the photon state again and then returns the photon state to the party A; the party A compares a measured quantum state with originally prepared quantum state and sends a comparison result to the B party; the party A judges whether employed measurement basis is accurate or not, carries out marking if the employed measurement basis is accurate, sends marked location information to the party B and discards wrong location information; and the party A and the party B generate a shared bit string according to own information and received information. Compared with an entangled state QDKD (Quantum Dense Key Distribution) protocol, the method has the advantages that complex quantum resources and equipment are avoided, and the method is more economic and feasible.

The invention discloses a controlled quantum secure direct communication method based on five particles. A method of sending a particle to a receiver is adopted, and the transmission efficiency of communication is improved by reducing the number of particles transmitted in a quantum channel; and a sender retains 3 particles in the communication process, adopts a quantum state to encode 3 bits of information, thereby improving the encoding capacity, increasing the number of information bits exchanged by both communication parties, and improving the transmission efficiency by 60%.

A railway system with at least one track having at least two rails and a method for encoding data for this railway system are disclosed. Railway signaling systems are located proximate to the tract for controlling railway cars moving along the rails. The railway system also includes safety systems associated with the railway signaling systems for exchanging data between the safety systems for safely controlling the railway signaling systems. The data are exchanged bidirectionally by signal pulses, whereby digital electrical signals are transmitted via the two electrically conducting rails. For encoding the data, each data point is formed from one or more signal pulses within a predetermined cycle time which is divided into time intervals. The encoding capacity can be enhanced, without significantly increasing the complexity, by using electrical signals that contain the encoded data in each time interval in form of at least one of three different signal states.