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

A two-dimensional dot matrix barcode encoding method comprises: forming a plurality of coordinate calibration blocks, a plurality of data storage blocks, a first indication block and a second indication block respectively by filling code points into the virtual code point storage blocks, wherein the first indication block and the plurality of coordinate calibration blocks are filled with a code point located in the center of the virtual code point storage blocks; and forming, by means of a combination of the first indication block and the second indication block, a direction and coordinate indication set indicative of a direction and a coordinate, wherein the second indication block is not filled with a code point or is filled, in the center thereof, with an ink code point capable of reflecting a light having a specific wavelength, and the plurality of coordinate calibration blocks are separated from each other.

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.

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 an indoor positioning method based on three-dimensional code mapping. The method comprises the following steps: (S100) enabling a base station to estimate a channel according to a received uplink signal, generate a feature vector matrix of an antenna group Antk, map the feature vector matrix of the antenna group Antk into a three-dimensional code, and match the three-dimensional code to obtain an approximate code word three-dimensional code, so as to obtain a precoding matrix W of the antenna group Antk; (S200) carrying out beam forming on a base station transmitting signal according to the precoding matrix W; (S300) obtaining distances lk between the mobile terminal and four antenna groups Antk which are not on the same plane through a distance loss model, obtaining four balls with an antenna group Anti k as a circle center and a distance lk as a radius, establishing a three-dimensional space spherical surface equation set, solving by using a corrected maximum likelihood method to obtain a three-dimensional coordinate, and correcting a z value of the three-dimensional coordinate to obtain an estimated value of the three-dimensional coordinate of the mobile terminal. According to the method, the indoor real-time spatial positioning is realized by utilizing the distributed antenna and combining a beam matching mode of three-dimensional code mapping.

The invention discloses a surface acoustic wave device with the integrated function of radio frequency identification and wireless sensing and its working method. , two of the channels realize the integrated function of radio frequency identification and temperature sensing, and the other two channels realize the function of parallel sensing of two gases, which can be used for cold chain foods such as refrigeration and freezing or foods with clear temperature requirements. It can also be further used in modified atmosphere packaging food. Among multiple reflective gratings of the SAW device, the reference reflective grating is used to eliminate the influence of distance on the phase measurement results, and the temperature compensation reflective grating is used to compensate the influence of temperature on the phase measurement results. The present invention is characterized in that information traceability and quality inspection in the field of food safety can be realized simultaneously by only one passive device, and the function is easy to realize and has high cost performance.

The invention discloses an indoor positioning method based on four-dimensional code mapping, and the method comprises the steps: (S100), carrying out the Kronecker product of a horizontal-dimensionalfeature vector matrix and a vertical-dimensional feature vector matrix, generating a feature vector matrix of an antenna group, mapping the feature vector matrix into a four-dimensional code, carryingout the matching, obtaining an approximate code word four-dimensional code, and obtaining a pre-coding matrix; (S200), performing beam forming on the base station transmitting signal according to theprecoding matrix of the mobile terminal; and (S300), forming a virtual cell taking the mobile terminal by the to-be-positioned mobile terminal and the antenna group as the center; and forming a van virtual cell taking the mobile middle end as the center with surrounding mobile terminals, constructing an estimation function to obtain a positioning target function, solving the positioning target function by adopting a nonlinear least square algorithm, and taking the coordinate when the positioning target function takes the minimum value as the coordinate of the to-be-positioned mobile terminal.According to the method, beam matching of four-dimensional code mapping is combined with a virtual cell cooperation mode, and indoor real-time space positioning is achieved.

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 preparation method of encoding microspheres, comprising the steps of coating a sacrifice layer on an underlay, growing or preparing a microsphere material layer compounded by a single layer or multiple layers in a depositing mode on the surface of the sacrifice layer, carrying out semiconductor microprocessing procedures of photoresistive spread coating, photodevelopment, corrosion and cleaning for the microsphere material layer to produce an encoding micro pattern or array, carrying out photoetching again according to the required microsphere size of the preparationand cleaning to remove the microsphere material layer outside the microsphere outline, selecting a liquid capable of dissolving the sacrifice layer, submersing the underlay with the sacrifice layer inside and the encoding microsphere into the liquid, and finally releasing the microspheres differently encoded to suspend in the liquid. The invention realizes the preparation of the encoding micropheres through a microprocessing technology to improve the capacity of the microsphere encoding and can adopt a general fluorescence microscope to detect so as to effectively reduce the cost for biological analysis; in addition, the preparation process has better repeatability and is conveniently actualized.

The invention provides a novel wide temperature range temperature measurement method of a SAW RFID tag. The method comprises steps of distributing frequency difference at the biggest frequency interval of searching signals emitted by a reader, and selecting frequency difference of multiple searching signals meeting the condition that phase difference fuzziness resistance is performed for construction of a congruent equation; selecting two reflecting gratings in any position in the SAW RFID tag; extracting fuzzy phases of echo signals generated by the reflecting gratings of each frequency searching signal so as to obtain the fuzzy phase difference corresponding to each group of frequency difference of each reflecting grating; through the multiple groups of frequency difference and the fuzzy phase difference, constructing the congruent equation to achieve phase difference fuzziness resistance; in the standard temperature, calibrating fuzziness-free phase difference between the reflecting gratings; and comparing the fuzziness-free phase difference between the reflecting gratings in the actual environment temperature where the SAW tag is arranged with the fuzziness-free phase difference between the reflecting gratings in the standard temperature, thereby obtaining the temperature change quantity relative to the standard temperature and achieving temperature measurement.

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.

The present invention provides a fluorescent coded microsphere, an array and a preparation method, wherein the coded microsphere includes a microsphere carrier, the microsphere carrier is a mesoporous microsphere, and at least one kind of fluorescent light is arranged inside the microsphere carrier. Markers, the fluorescent markers are formed by connecting fluorescent dyes with intermediary substances, and the central emission wavelengths of the fluorescent dyes corresponding to each of the fluorescent markers are different, so that each fluorescent dye defines one of the encoded microspheres Encoding information for the dimension.