30 results about "Space shift keying" patented technology

The invention relates to the field of wireless communications, and discloses a binary digital signal space shift keying modulation and demodulation method for a multi-input multi-output system. The multi-input multi-output system comprises Nt transmitting antennas and Nr receiving antennas. The input data is divided into K data streams to carry out SSK (Space Shift Keying) modulation; according to the transmitting antennas corresponding to the original mapping serial number from n1, n2 to nK of the K data streams on the Nt transmitting antennas, K modulation symbols are respectively mapped to the different transmitting antennas and transmitted. The invention further provides a corresponding demodulation method. The modulation and demodulation method can greatly improve the spectrum efficiency of the SSK technology, and under the same frequency efficiency, can achieve lower error rate performance than the traditional VBLAST (Vertical Bell Layered Space Time) system.

The invention provides a novel keyboard layout, which resets all the keys in a traditional keyboard layout except letter keys and a space key. The keys on the keyboard, of which the lateral length is longer than the length of a device, are transferred. And one or more lines of keys are added to the longitudinal height of the keyboard to install the keys transferred from the lateral length, and a part of the keys is mergered, a part of the keys are added and a part of the keys are removed as required. Touch bars are arranged at the periphery of the keyboard and can be used for selecting the input options of the input languages in a sliding manner and operating the sliders on the left, the right, the upper and the lower parts of a screen; moreover, two of the touch bars can be operated to realize the functions of enlargement, shrinkage, flexibility, translation and rotation.

The invention relates to a compressed-sensing-based signal detection method for a GSSK (generalized space shift keying) modulation communication system and belongs to the technical field of wireless communications. Compressed sensing technology is used with maximum likelihood detection; a confidence interval T' of an activated antenna position in a transmitting antenna array in the GSSK modulation communication system is obtained by the compressed sensing technology; ML (maximum likelihood) detection is performed in the confidence interval T'. Compared with overall search in ML detection, the method has the advantages that search space for ML detection is narrowed greatly so that computing complexity is reduced greatly; during the process of determining the confidence interval T' by the compressed sensing technology, detection precision is the same as that in ML detection by setting proper k constants.

The invention relates to a Chinese character Pinyin input method with initial-final partition areas. A touch keyboard comprises an initial area, a final area and a functional key area. The functional key area comprises a comma key, a full stop key, a number switching key, a Chinese-English switching functional key, a division symbol key, symbol functional keys, a backspace key, a space key and a return key. The keyboard is switched into a number key through the number switching key. The area of each letter key is enlarged. When each Chinese character is input, the finger touches the initial area only one time, the mistake probability is reduced, the information interaction between the brain and eyes of a user is facilitated in the input process, the pronunciation rule of one-initial one-final of the Chinese character Pinyin is strengthened, and the user can memorize the key positions conveniently in the long-term using process.

The invention discloses a generalized space-time-shift keying modulation method based on a unit matrix loop structure. Information transmission is carried out by spatial modulation (SM) and space shift keying (SSK) by means of spatial dimensions, and extra frequency spectrum efficiency can be obtained compared with a traditional MIMO scheme. According to the modulation method, a unit matrix moves in a loop mode inside a scattering matrix, and no auxiliary computer search needs to be carried out on the scattering matrix; the GSTSK-CI method is applicable to any MIMO system with the number of transmitting antennas larger than 2, and transmit diversity can be obtained except for two special conditions; meanwhile, the GSTSK-CI method has the lower decoding complexity compared with a traditional GSTSK scheme, and has higher spectral efficiency compared with an SM-OSTB scheme on the condition that the numbers of transmitting antennas are the same; the simulation result verifies theoretical analysis and indicates that the GSTSK-CI method is better than the GSTSK scheme and the SM-OSTBC scheme.

The invention discloses a space shift keying transmission system receiving end data detection method based on layered detection. The method includes the following steps that firstly, a receiving end model is determined; secondly, the receiving end model is simplified; thirdly, sent data are demodulated through a layered detected algorithm. According to the space shift keying transmission system receiving end data detection method based on layered detection, the bit error rate (BER) performance of the method is gradually similar to that of an optimal detection (ML) algorithm along with the increase of the search radius, and when the search radius is equal to the number of antennas at the sending end, the detection algorithm is equivalent to a maximum likelihood detection algorithm. Calculation ranking is conducted on each layer through the algorithm, the bit error rate performance of the method can be similar to that of the optimal detection algorithm in the small search radius, and therefore the method has the advantages that good performance can be acquired, and the complexity of the algorithm at the receiving end is greatly lowered.

A space-shift keying method based on a time-space matrix constellation diagram includes that an emitter of a communication system establishes a time-space matrix constellation diagram off-line, the emitter of the communication system finds out the position of an emission antenna in the time-space matrix and establishes the time-space matrix constellation diagram by determining the sending value of the position, and the information bits input by the emitter are divided into groups according to the constructed time-space matrix constellation diagram. The information bits in each group are mapped to one time-space matrix in the time-space matrix constellation diagram for signal emission. The reception apparatus of the communication system employs maximum-likelihood demodulation, and receives signals sent by the emitter. The space-shift keying system obtains emission diversity gain, and the performance of the system is improved. The limitation that the number of the emission antennas of a conventional space-shift keying system has to be the power of 2 is overcome, and the design flexibility of the system is improved. The transmission characteristics of a single chain of the conventional space-shift keying system are retained, and the complexity of a multi-antenna system is reduced.

The invention relates to a space key for a computer keyboard, which comprises a press key, two X linkage mechanisms, a support plate and an elastic element, wherein the linkage mechanisms are connected between the press key and the support plate and are rigidly connected through two connecting rods for forming an integral linkage mechanism, the connecting rods and two X frame structures 8a simultaneously form an outer connecting rod 8, and the connecting rods and two X frame structures 9a simultaneously form an inner connecting rod 9. Through the mechanism device, the structure is perfectly optimized and is simplified, the stability and the balance performance are improved, and the cost is also greatly saved.

The invention discloses an automatic assembling machine for the space key LINK of a computer keyboard. The automatic assembling machine comprises a rack, and a space key moving mechanism, three sets of LINK sucking and pressing assemblies and a control mechanism are arranged on the upper portion of the rack. The space key moving mechanism is used for driving a space key base body of the computer keyboard to do linear reciprocating motion and supplying the space key base body of the computer keyboard to the three sets of the LINK sucking and pressing assemblies for processing and assembling. The three sets of the LINK sucking and pressing assemblies are all used for pressing space key accessories of the computer keyboard onto the upper part of the space key base body of the computer keyboard. The control mechanism is electrically connected with the space key moving mechanism and the three sets of the LINK sucking and pressing assemblies, and the control mechanism is used for controlling the space key moving mechanism and the three sets of the LINK sucking and pressing assemblies to operate automatically. The automatic assembling machine for the space key LINK of the computer keyboard can replace manual work to complete computer keyboard space key LINK assembling work, the labor intensity of workers can be greatly relieved while the assembling efficiency is improved, and then the assembling machine can increase enterprise benefits.

The invention discloses a design and input method of a multifunctional keyboard. The design and input method comprises the following steps that (1) a functional key zone and the like are arranged according to the layout of the existing computer keyboard; (2) a left figure point rod and a right figure point rod are arranged in a main keyboard zone, the left figure point rod is arranged in the clearance formed by an R key, a D key and an F key, and the right figure point rod is arranged in the clearance formed by an L key, a J key and a K key; (3) a left space key and a right space key are arranged in the main keyboard zone and symmetrically positioned between the two Alt keys side by side; (4) a state indicating lamp is arranged in a state indicating zone; and (5) the left figure point, the right figure point, the left space key and the right space key are combined for use to achieve multiple corresponding input functions. The invention further discloses the multifunctional keyboard. By means of the multifunctional keyboard, a user can conveniently operate a computer without a mouse. A touch pad, a left key and a right key can be removed, so that the keyboard is miniaturized and meets the requirements for small, thin and convenient usage of the existing notebook computer.

The invention relates to a central cycle weight generalized space shift keying modulation device, which is characterized in that it comprises: a serial-to-parallel conversion module; an active antenna group mapping module; a center cycle weight space shift keying symbol generation module; and a transmission vector synthesis module. Another technical solution of the present invention is to provide a central cycle weight generalized space shift keying modulation method. The invention has high reliability and good spectrum efficiency, and can flexibly activate any antenna, and is applicable to vehicle-road communication or vehicle-vehicle communication scenarios in the Internet of Vehicles to improve the communication quality of unbalanced links between receiving and transmitting antennas.

The invention discloses an application of a space key. At present, in a windows interface, if an application program is required to be closed, a dialog window comprising the content that the function of the mouse click can be realized by utilizing letter keys 'y' and 'n' is popped up, and most users close the application program by virtue of a mouse, thus the interface is not marked enough and the mouse is frequently used, while the fact that use of the mouse is reduced to the utmost extent is beneficial to human health in the aspect of human engineering. In the invention, the 'space key' is utilized to define and realize 'not' function of the application program.

The invention discloses a space shift key modulation method based on transmit diversity. The method of the invention is based on the traditional SSK modulation, combined with the transmit diversity mode for transmission and reception. The transmit end uses multiple time slots to send the same data. Different antenna mapping methods are used in different time slots, and at the same time, some additional data information is carried by using the combination of transmission symbols for activating antennas in different time slots. Therefore, the method of the present invention is an SSK modulation transmission method based on space diversity. Compared with traditional SSK, due to the diversity method of sending the same data in multiple time slots, the bit error performance of the system is improved; different mapping methods are used in different time slots to make the system obtain higher diversity gain; The transmitted symbols carry transmitted information, so the frequency efficiency of the system is further improved.

The invention relates to a central circulation weight generalized space shift keying modulation device, which is characterized by comprising a serial-parallel conversion module, a space shift keying modulation module and a central circulation weight generalized space shift keying modulation module, an antenna group activating and mapping module; a central circulation weight space shift keying symbol generation module; and a transmitting vector synthesis module. Another technical scheme of the invention is to provide a central circulation weight generalized space shift keying modulation method.The method has high reliability and good spectrum efficiency, any antenna can be flexibly activated, the method can be suitable for vehicle-road communication or vehicle-vehicle communication scenesin the Internet of Vehicles, and the communication quality of an unbalanced link of a receiving antenna and a transmitting antenna is improved.

The invention discloses a step-by-step encoding space shift keying method, a transmitting end encodes information bits step by step in multiple steps, so that the spatial degree of freedom of a multiple-input-multiple-output system is fully utilized, and the transmission rate of the system is improved. According to the step-by-step multi-step coding scheme provided by the invention, in the codingprocess of each step, different information bits are mapped, and finally a final-order to-be-coded vector is formed. A receiving end can adopt a maximum likelihood detection algorithm. In addition, the invention also provides a detection scheme based on orthogonal triangular decomposition. Compared with a traditional spatial domain modulation scheme, the step-by-step coding space shift keying scheme provided by the invention can obtain a higher transmission rate and better bit error rate performance.

A space-shift keying method based on a time-space matrix constellation diagram includes that an emitter of a communication system establishes a time-space matrix constellation diagram off-line, the emitter of the communication system finds out the position of an emission antenna in the time-space matrix and establishes the time-space matrix constellation diagram by determining the sending value of the position, and the information bits input by the emitter are divided into groups according to the constructed time-space matrix constellation diagram. The information bits in each group are mapped to one time-space matrix in the time-space matrix constellation diagram for signal emission. The reception apparatus of the communication system employs maximum-likelihood demodulation, and receives signals sent by the emitter. The space-shift keying system obtains emission diversity gain, and the performance of the system is improved. The limitation that the number of the emission antennas of a conventional space-shift keying system has to be the power of 2 is overcome, and the design flexibility of the system is improved. The transmission characteristics of a single chain of the conventional space-shift keying system are retained, and the complexity of a multi-antenna system is reduced.

Provided is an overloaded keypad layout which is efficient, ergonomic, unambiguous, intuitive to operate, and also familiar to the average user in its letter arrangement. More particularly, the overloaded keypad layout comprises four rows, and a space-key is positioned in the third row from bottom, and is QWERTY-like its letter arrangement. Further, the multitap input method or selector (select-the-next-letter key) input method may be employed to disambiguate the overloaded keypad layout.

The invention discloses a differential optical space shift keying modulation system and a modulation method. The system comprises a differential space shift keying modulation module, an LED driving circuit, and an LEDthat are at a transmitting end, , a photoelectric detection circuit,a signal processing circuit and a signal demodulation modulethat are at a receiving end,. A serial data stream firstly passes through the differential space shift keying modulation module to generate a corresponding mapping matrix. Differential operation is achieved by conducting Kronecker product on the mapping matrix at the current moment and the transmission matrix at the previous moment, and the transmission matrix at the current moment is obtained. And the transmission matrix signal of the current symbolperiod is amplified by the driving amplification circuit and then sent by the LED. At a receiving end, a photoelectric conversion circuit and a signal processing circuit are used for converting an optical signal in an atmospheric channel into a processable parallel electric signal, and the processable parallel electric signal is sent to a signal demodulation module in the FPGA. And the demodulation module demodulates the differential signal according to the transmission matrix of the current symbol period and the mapping matrix of the previous symbol period, and finally recovers the original data stream.

The invention discloses a small-size keyboard for carrying out alternative layout input on a digital editing function key area, each key position of a main key area of the QWERTY layout small-size keyboard can correspond to a second key position function, and an editing alternative key area corresponds to 15 key positions in three rows and five columns on the left side of the main key area; the number replacement key area corresponds to 15 key positions in 3 rows and 5 columns on the right side of the main key area, and the function replacement key area corresponds to 13 key positions on the left side of the first row and 3 key positions on the right side of the second row of the main key area; the space key position corresponds to an Fn key function, and the right Shift key position corresponds to an FnLock key function; when the space key is pressed down or the right Shift key is clicked to activate the function of the Fn key, the second function keys of all the key positions are activated. The input experience of a four-key-area full-size keyboard can be replaced on a single-key-area small-size keyboard.

The invention provides a coding input method for Vietnamese words. Coding is carried out according to the corresponding relationship between constitution of Vietnamese characters and English letter keys, symbolic keys and part of function keys, and corresponding characters are input according to the sequence of the characters constituting Vietnamese. The coding input method is characterized in that at least three Vietnamese characters are defined on each key, and coding on the Vietnamese characters is carried out in modes of clicking the keys, double clicking the keys and combination of a guide key and the corresponding key, wherein the guide key is the space key. By means of the coding input method, several Vietnamese characters can be defined on one key, and more than 100 independently-coded Vietnamese characters can be defined just through conventional English letter keys, the function keys and part of function keys; under the condition of single-screen display, all Vietnamese characters can be input quickly, compatibility of operation experience of PC users is achieved and space is saved; meanwhile, operation is convenient, and the method is suitable for single-hand and two-hand operation on various intelligent mobile devices.

The invention discloses a generalized space-time-shift keying modulation method based on a unit matrix loop structure. Information transmission is carried out by spatial modulation (SM) and space shift keying (SSK) by means of spatial dimensions, and extra frequency spectrum efficiency can be obtained compared with a traditional MIMO scheme. According to the modulation method, a unit matrix moves in a loop mode inside a scattering matrix, and no auxiliary computer search needs to be carried out on the scattering matrix; the GSTSK-CI method is applicable to any MIMO system with the number of transmitting antennas larger than 2, and transmit diversity can be obtained except for two special conditions; meanwhile, the GSTSK-CI method has the lower decoding complexity compared with a traditional GSTSK scheme, and has higher spectral efficiency compared with an SM-OSTB scheme on the condition that the numbers of transmitting antennas are the same; the simulation result verifies theoretical analysis and indicates that the GSTSK-CI method is better than the GSTSK scheme and the SM-OSTBC scheme.

The invention discloses a multi-stream air-shift keying modulation and demodulation method in a multi-input multi-output system, belonging to the technical field of wireless communication. The modulation method of the present invention is as follows: the data to be sent is divided into multiple streams for SSK modulation, each stream is distinguished by a different fixed modulation signal, the modulated multi-stream data is sequentially superimposed, and the specific modulation symbol selection criteria and superimposition Algorithm, so that there will be no collision of transmission signals after the multi-stream information is superimposed, so that each stream of data can carry the transmission data of log2Nt bits, where Nt is the number of transmitting antennas. The invention also discloses a demodulation method suitable for the above modulation method. The modulation method of the present invention greatly improves the spectral efficiency of the SSK system by adding multiple transmission streams without changing the antenna configuration of the SSK system, and under the same spectral efficiency, it can obtain a higher frequency than the traditional VBLAST system and the enhanced VBLAST system. SSK system has a lower bit error rate.

The invention relates to the field of wireless communications, and discloses a binary digital signal space shift keying modulation and demodulation method for a multi-input multi-output system. The multi-input multi-output system comprises Nt transmitting antennas and Nr receiving antennas. The input data is divided into K data streams to carry out SSK (Space Shift Keying) modulation; according to the transmitting antennas corresponding to the original mapping serial number from n1, n2 to nK of the K data streams on the Nt transmitting antennas, K modulation symbols are respectively mapped to the different transmitting antennas and transmitted. The invention further provides a corresponding demodulation method. The modulation and demodulation method can greatly improve the spectrum efficiency of the SSK technology, and under the same frequency efficiency, can achieve lower error rate performance than the traditional VBLAST (Vertical Bell Layered Space Time) system.

The invention discloses a space-shift keying method of step-by-step coding, wherein the transmitting end uses step-by-step multi-step coding of information bits, thereby making full use of the space degree of freedom of the multi-input multi-output system and improving the transmission rate of the system. In the step-by-step multi-step encoding scheme proposed by the present invention, different information bits are mapped in each step of the encoding process, and finally the final order vector to be encoded is formed. The receiving end can adopt the maximum likelihood detection algorithm, and the present invention also proposes a detection scheme based on orthogonal triangular decomposition. Compared with the traditional space domain modulation scheme, the progressive coding space shift keying scheme proposed by the present invention can obtain higher transmission rate and better bit error rate performance.

The invention discloses a method for detecting data at the receiving end of an air shift keying transmission system based on layered detection, comprising the following steps: the first step, establishing the receiving end model; the second step, simplifying the receiving end model; the third step, The transmitted data is demodulated through a layered detection algorithm. The data detection method of the receiving end of the space shift keying transmission system based on layered detection of the present invention, its bit error (BER) performance gradually approaches the optimal detection algorithm (ML) with the increase of the search radius, when the search radius is the transmitting end antenna When the number, the detection algorithm of the present invention is equivalent to the maximum likelihood detection algorithm. The algorithm calculates and sorts each layer so that the bit error rate performance close to the optimal detection algorithm can be obtained under a small search radius, so the present invention can greatly reduce the complexity of the algorithm at the receiving end while obtaining better performance Spend.

The present invention is applicable to the technical field of text input. Provided are a text sorting method and apparatus, a terminal device, and a medium. The text sorting method comprises: generating, according to a character input by an inputter, a text sequence matching the character; acquiring a previous input word corresponding to the character, and respectively combining the word with each group of text in the text sequence; determining, according to a pre-stored number of search results, the number of search results of each group of text combinations after the combination; carrying out a first instance of sorting on each group of text in the text sequence according to the number of search results; and acquiring a personal attribute of the inputter and a character attribute of the character, and carrying out a second instance of sorting on each group of text, subjected to the first instance of sorting, in the text sequence, so that the sorted text is more in line with requirements of the inputter, wherein the inputter can directly input text by means of pressing the space key, thereby shortening the text input time and improving the text input efficiency. The present invention is applicable to practical application.

The invention discloses an automatic space key assembling system. The automatic space key assembling system comprises a rack, and further comprises a space key lining feeding device, a four-axis mechanical arm, a CCD detecting device, a station rotating platform device, a roller press discharging device, a receiving device and a PLC which are arranged on the rack. By means of the above manner, theautomatic space key assembling system is characterized in that a tray feeding manner is adopted for automatic feeding, the mechanical arm is used for taking a material, CCD automatic detection is carried out, qualified space key linings are placed into key caps on positioning jigs, the linings and the key caps enter a roller press station to be subject to roller press after move loading and overturning, and pressed space keys are placed into the receiving device through the discharging device; in addition, the positioning jigs in multiple models are arranged in equipment, the procedure is orderly switched when model changing is needed without replacement of the jigs, and the model changing time is shortened; and meanwhile, errors generated by manual participation are reduced, the production efficiency is improved, and the advantages of being high in reliability, accurate in positioning, compact in structure, high in transposition speed, small in noise and the like are achieved.