31 results about "Dual code" patented technology

The invention provides a pre-coding method for an MIMO (multi-input multi-output) system of 8 transmitting antennas. A dual code text is adopted in the method, and the dual code text is determined by selectively succeeding partial code words of LTE (long term evolution) and then performing certain extension. The method for pre-coding by using the dual code text reduces the feedback overhead of the system, acquires good performance gain, and is suitable for a multi-user multi-input multi-output (MU-MIMO) system.

An anti-counterfeiting method associates the first code with an article to be authenticated to identify the article, and associates a second code with the first code as a confirmation code to verify the first code. Both the first code and the second code are reproduced on the article. The reproduced first code is overt code while the reproduced second code is covert and concealed from normal viewing by a concealment means such as a scratch-off material. An authorized person (e.g., a consumer) is allowed to conditionally remove the concealment to reveal the covert code. The first code and the revealed second code are used to verify the authenticity of the product with a verification center. During the verification, the first code identifies the article, while the second code verifies the first code to test the authenticity of the associated article.

Disclosed in the invention is a two-dimensional code-based object identity dual-code identification method. According to the method, a two-dimensional code is used as a primary code and numbers or letters are used as a secondary code; and the two codes are combined together to carry out identification on uniqueness of an object. Besides, two-dimensional code identification software is utilized to rapidly identify a two-dimensional code corresponding to the primary code; if it is necessary to carry out anti-counterfeiting query and point management, a coating layer can be revealed and the secondary code is further input. Because the length of the secondary code is short and the inputting process is simple, the provided method has good applicability; and meanwhile, multiple functions including a product anti-counterfeiting function, goods-fleeing prevention, logistics management, tracking of source tracing and point management can be realized.

The invention discloses a remote control method and a system capable of automatically adjusting frequency and distributing ID. The method comprises the following steps: (1) searching at least two frequency points which are not occupied by a remote control, setting a sending time limit, successively and circularly sending dual code information to a matched receiver from the frequency points which are not occupied until sending exceeds the time limit or the receiver confirms to receive; (2) searching the dual code information of the relevant frequency point by the receiver to judge whether the dual code information of the relevant frequency point is searched, if yes, feeding back confirmation information, otherwise continuously searching; (3) after the remote control receives the confirmation information fed back by the receiver, retracting the state of sending the dual code information, beginning to send data to the receiver on the determined frequency point, and simultaneously receiving the relevant data by the receiver. The system has the functions of automatically adjusting frequency and automatically distributing ID as well as the memory function of wireless channel ID data, has wide frequency band and high channel utilization ratio and strengthens system antijamming capability.

The invention discloses a multi-core and multi-thread construction method for a heat path in a dynamic binary translator. The method comprises the following steps: a basic block translation and object code execution part works as a main thread, and a heat path construction and super block translation part works as a sub-thread; an independent code cache structure in a dynamic binary translator for adaption adopts a design mode of dual code cache, the cache of two codes is under unified management of a hash table function, so that the main thread and the sub-thread can be conducted in parallel in the process of data inquiry and data renewal; and the main thread and the sub-thread are appointed to work on different cores of a multi-core processor combined with hard affinity, and a continuous segment of memory space and two counters are utilized to stimulate a segment of queue, so as to carry out the communication between the threads in machine language level and high-level language level. The invention has the favorable characteristics of high parallelism and low synchronous consumption, and provides new conception and new frame for the optimization work of dynamic binary translators in the future.

The invention discloses a low-density parity check code-based adaptive modulation and coding method. The method comprises the following steps of: transmitting a transmitted signal into a wireless channel by using a radio frequency transmitting module after performing dual-code rate low-density parity check code coding and dual-mode modulation in a transmitter part; according to feedback information of a receiver, switching a low-density parity check code coding mode and a modulation mode, and selecting one of two modulation and coding scheme (MCS) selection algorithms according to system requirements; performing frequency-conversion on a received signal to obtain a baseband signal or an intermediate frequency signal by using a radio frequency receiving module, and outputting the baseband signal or the intermediate frequency signal after performing signal detection, the dual-mode modulation and the dual-code rate low-density parity check code coding; and performing channel estimation according to the received signal, feeding a channel estimation result back to the transmitter, and simultaneously switching the low-density parity check code coding mode and switching the modulation mode. The method can improve the efficiency of a data transmission bandwidth remarkably and realize the balance between transmission performance and technology realizing complexity.

The invention discloses a dual-code anti-counterfeiting system and a dual-code anti-counterfeiting method for intelligent communication terminals. In the dual-code anti-counterfeiting system, a plain code subsystem is used for generating a plain code, a secret code subsystem is used for generating a secret code, the plain code and the secret code are both attached to a logo, and through the plain code on the logo, a user can trace production information of a product in a database. According to the dual-code anti-counterfeiting system and the dual-code anti-counterfeiting method for the intelligent communication terminals, the two independent codes are utilized to improve anti-counterfeiting effect, a user only needs to read and query when inspecting a system, and therefore the operation is simple. Besides, the cost of the logo is relatively low.

It is a double-code symmetric false proof method with two sets of codes of sixteen to twenty-one bits, which has a structure of corporation codes, product codes, sequence codes, and code type. It comprises the following steps: to compile two sets of structure as above through code type change and to form irregular false proof codes through coding and to store the each product false proof codes into the computer database; one set of codes are covered with a coat and the other is printed in the proof marks without coat; when the mark is stuck to the product to use communication means such as telephone to inquire the proof codes information and identify the products.

The invention discloses a service-oriented architecture (SOA)-based distribution network dual-coding system. The SOA-based distribution network dual-coding system comprises a code library unit, an enterprise bus of service (EBS) connected with the code library unit, and each automatic system of the distribution network connected with the EBS, wherein the code library unit comprises scheduling codes and equipment codes; each automatic system of the distribution network transmits a request to the EBS and acquires required coded information; and the scheduling codes and the equipment codes are correlated with each other by one-to-one mapping, so that the other corresponding code can be called by using one code. By the SOA-based distribution network dual-coding system, high-efficiency, reliable and complete distribution network information coding is realized by taking the information integration of each system of the distribution network under the SOA architecture as the basis and taking the EBS technology as a center.

A correlator and matched filter for use with coded transmission, such as CDMA, form new codes from the sums and differences of the original codes, where only one of the new codes is non-zero for each element position and effect hardware savings using the new codes.

The invention discloses a safe automobile remote-control emitter, and belongs to the electronic technical field. The emitter is mainly composed of a two wave four code battery power circuit, a two wave four code button switch circuit, a two wave four code total electronic oscillating circuit switch circuit, a two wave four code one wave/two wave electronic switch circuit, a two wave four code one wave/two wave oscillating circuit switch circuit, a two wave four code one wave one code/one wave two code electronic switch circuit, a two wave four code one wave one code/one wave two code coding electronic circuit, a two wave four code one wave one code/one wave two code encoding output circuit, a two wave four wave two wave three code/two wave four code electronic switch circuit, a two wave four code two wave three code/two wave four code encoding electronic circuit, a two wave four code two wave three code/two wave four code encoding output circuit, a two wave four code one wave two code/two wave two code encoding or gat output circuit, and a two wave four code one wave/two wave two code emission electronic circuit unit. The wave and wave of two waves, the code and code of two codes, and the dual codes and dual codes of four codes can form different combinations, and the safety is high.

A direct sequence spread spectrum receiver includes a first spreading code generator for receiving a first channel signal spectrum spread by a first spread code, while a second group of receivers use a second spreading code, where the first and second codes are partially correlated, so that, the first group of receivers receive all messages communicated while the second group of receivers only receives a portion of the messages. In this manner, a spread spectrum broadcast system can selectively communicate to a selected portion of receivers in a whole group of receivers by simply switching the spreading code at the transmitter.