Patents by Inventor Tao Duan
Tao Duan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20210075514Abstract: The disclosure relates to a multi-modulation-format compatible high-speed laser signal generation system and method. The disclosure can greatly improve modulation format compatibility of a laser communication system and saves system upgrading costs and resource costs. The system mainly includes a control instruction unit, a serial-parallel changeover switch unit, a precoding switch unit, a power control unit, an IQ modulator, a narrow line width laser, and a bias point control unit, wherein the control instruction unit is respectively connected to the serial-parallel changeover switch unit, the precoding switch unit, the power control unit, and the bias point control unit; the serial-parallel changeover switch unit, the precoding switch unit, the power control unit, and the IQ modulator are electrically connected in sequence; the narrow line width laser is connected to an optical input end of the IQ modulator; and the bias point control unit is connected to the IQ modulator.Type: ApplicationFiled: September 13, 2018Publication date: March 11, 2021Inventors: Xiaoping XIE, Xinning HUANG, Wei WANG, Tao DUAN, Hui HU, Yulong SU, Duorui GAO
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Patent number: 10931359Abstract: Disclosed are a method and apparatus for detecting a beam, which are used for realizing accurate beam forming under a millimeter wave wireless communication system where antenna array calibration is carried out without using a calibration network in the millimeter wave wireless communication system. The method for detecting a beam provided in the present application comprises: determining a beam with a pre-set width; and using the beam with the pre-set width to scan a user equipment.Type: GrantFiled: January 18, 2018Date of Patent: February 23, 2021Assignee: DATANG MOBILE COMMUNICATIONS Equipment CO., LTDInventors: Shihua Wang, Tao Duan, Jingyan Ma, Jian Wu
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Publication number: 20200374015Abstract: An array antenna calibration method and device, which is used for calibrating an array antenna in real time in an open calibration environment. Said method includes: determining, on the basis of a preset direction angle of each preset beam direction, an initial beam weight vector matrix of an array antenna to be calibrated, and emitting, by means of a test antenna in a standard beam direction, a first calibration signal to the array antenna to be calibrated; determining, on the basis of the first calibration signal received by each channel of the array antenna to be calibrated, a magnitude-phase error between the first calibration signal received by means of a center channel and the first calibration signal received by means of each channel; and using the magnitude-phase error to calibrate the initial beam weight vector matrix, so as to obtain a compensation beam weight vector matrix.Type: ApplicationFiled: September 4, 2018Publication date: November 26, 2020Inventors: Shihua WANG, Tao DUAN, Jingyan MA
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Publication number: 20200136709Abstract: Disclosed are a method and apparatus for detecting a beam, which are used for realizing accurate beam forming under a millimeter wave wireless communication system where antenna array calibration is carried out without using a calibration network in the millimeter wave wireless communication system. The method for detecting a beam provided in the present application comprises: determining a beam with a pre-set width; and using the beam with the pre-set width to scan a user equipment.Type: ApplicationFiled: January 18, 2018Publication date: April 30, 2020Inventors: Shihua WANG, Tao DUAN, Jingyan MA, Jian WU
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Patent number: 10601911Abstract: An example operation may include one or more of identifying partitions associated with a blockchain, identifying a new transaction to be committed to the blockchain, determining a partition code assigned to the new transaction, and committing the new transaction to one of the partitions associated with the partition code.Type: GrantFiled: November 16, 2017Date of Patent: March 24, 2020Assignee: International Business Machines CorporationInventors: Tao Duan, Hai Ji, Zi Jian Ji, Yuan Yuan Li
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Publication number: 20190149600Abstract: An example operation may include one or more of identifying partitions associated with a blockchain, identifying a new transaction to be committed to the blockchain, determining a partition code assigned to the new transaction, and committing the new transaction to one of the partitions associated with the partition code.Type: ApplicationFiled: November 16, 2017Publication date: May 16, 2019Inventors: Tao Duan, Hai Ji, Zi Jian Ji, Yuan Yuan Li
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Patent number: 10200095Abstract: Disclosed in the present invention are a data transmission method, an apparatus and an antenna array, in order to realize wide bandwidth data transmission of massive antenna array.Type: GrantFiled: July 21, 2016Date of Patent: February 5, 2019Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.Inventors: Huarong Sun, Tao Duan, Suling Zou, Jinxi Su, Huijuan Ni
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Patent number: 10185334Abstract: The present application provides a method and device for detecting temperature of a radio remote unit, to solve the problem that an RRU could be damaged due to an excessively high temperature. The method includes: acquiring temperature data of a radio remote unit; configuring power data of the radio remote unit according to the temperature data, when the temperature data is less than a temperature threshold or within the temperature threshold; and closing radio frequency channel(s) of the radio remote unit when the temperature data is more than the temperature threshold.Type: GrantFiled: December 30, 2013Date of Patent: January 22, 2019Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.Inventors: Xiaoyu Lei, Tao Duan, Huarong Sun, Liqiang Xing
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Patent number: 10091037Abstract: Disclosed is a DPD system. A DPD system provided in an embodiment of the present invention includes a table look-up unit and a DPD processing unit. First to Nth look-up-tables are used to combine two bit sequences of bit sequences obtained according to first to fourth address conversion tables so as to obtain first to Nth table look-up addresses. First to Nth DPD coefficients are found according to the first to Nth table look-up addresses, and one DPD coefficient is obtained via a DPD coefficient combination module, such that the DPD processing unit can perform DPD processing on a signal in first band according to the DPD coefficient. In the embodiment of the present invention, a look-up address is obtained according to four address conversion tables, a DPD coefficient is obtained from a look-up-table according to the look-up address, and then a final DPD coefficient is obtained to perform signal processing.Type: GrantFiled: June 16, 2016Date of Patent: October 2, 2018Assignee: Datang Mobile Communications Equipment Co., Ltd.Inventors: Jun Xiong, Peng Xiao, Jieli Wang, Tao Duan
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Publication number: 20180248593Abstract: Disclosed in the present invention are a data transmission method, an apparatus and an antenna array, in order to realize wide bandwidth data transmission of massive antenna array.Type: ApplicationFiled: July 21, 2016Publication date: August 30, 2018Inventors: Huarong SUN, Tao DUAN, Suling ZOU, Jinxi SU, Huijuan NI
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Publication number: 20180191537Abstract: Disclosed is a DPD system. A DPD system provided in an embodiment of the present invention includes a table look-up unit and a DPD processing unit. First to Nth look-up-tables are used to combine two bit sequences of bit sequences obtained according to first to fourth address conversion tables so as to obtain first to Nth table look-up addresses. First to Nth DPD coefficients are found according to the first to Nth table look-up addresses, and one DPD coefficient is obtained via a DPD coefficient combination module, such that the DPD processing unit can perform DPD processing on a signal in first band according to the DPD coefficient. In the embodiment of the present invention, a look-up address is obtained according to four address conversion tables, a DPD coefficient is obtained from a look-up-table according to the look-up address, and then a final DPD coefficient is obtained to perform signal processing.Type: ApplicationFiled: June 16, 2016Publication date: July 5, 2018Inventors: Jun Xiong, Peng Xiao, Jieli Wang, Tao Duan
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Patent number: 9960862Abstract: Disclosed are a method and device for detecting a standing-wave ratio, which are used for realizing quick and accurate detection of the standing-wave ratio by only using a downlink service signal transmitted by a TD-LTE base station system, thereby preventing a special training sequence from causing additional interference to the base station system.Type: GrantFiled: August 27, 2015Date of Patent: May 1, 2018Assignee: Datang Mobile Communications Equipment Co., Ltd.Inventors: Shihua Wang, Tao Duan, Bin Xue, Jieli Wang
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Publication number: 20170310402Abstract: Disclosed are a method and device for detecting a standing-wave ratio, which are used for realizing quick and accurate detection of the standing-wave ratio by only using a downlink service signal transmitted by a TD-LTE base station system, thereby preventing a special training sequence from causing additional interference to the base station system.Type: ApplicationFiled: August 27, 2015Publication date: October 26, 2017Inventors: Shihua Wang, Tao Duan, Bin Xue, Jieli Wang
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Patent number: 9647717Abstract: The present application relates to the field of digital pre-distortion processing. Disclosed in an embodiment of the present application are a pre-distortion parameter obtaining method and pre-distortion system for simplifying calculating complexity of a model while achieving good signal processing effect. The method comprises: after the beginning of periodic filtering processing, obtaining a pre-distorted signal after pre-distortion processing and a first feedback signal after power amplification (S101); obtaining a second feedback signal by eliminating the rated linear gain of the first feedback signal (S102); determining a pre-distortion parameter according to a matrix formed by the second feedback signal and a matrix formed by the pre-distorted signal (S103); updating the pre-distortion parameter index table according to the determined pre-distortion parameter (104).Type: GrantFiled: December 24, 2014Date of Patent: May 9, 2017Assignee: Datang Mobile Communications Equipment Co., Ltd.Inventors: Jun Xiong, Xinmin Wang, Tao Duan, Jingyi Wang
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Patent number: 9602226Abstract: A distributed spectrum analyzer and a method of spectrum analysis applying same. The spectrum analyzer adopts a separate design. A radio frequency receiver receives a signal, performs frequency conversion processing and AD conversion on the received signal, and sends the converted digital signal to a host. In such a structure, by a digital optical module, the radio frequency receiver is connected to a corresponding digital optical module on the host through an optical fiber, so as to implement a bidirectional data transmission. The host performs general control of the system as well as signal processing and spectrum analysis. Therefore, a multi-interface design is applied to the host of the spectrum analyzer, so as to support simultaneous access and control for a plurality of radio frequency receivers, thereby conveniently implementing multi-port measurement extension.Type: GrantFiled: November 23, 2012Date of Patent: March 21, 2017Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTDInventor: Tao Duan
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Patent number: 9497059Abstract: The disclosure discloses a method and device for performing peak clipping to multiple carrier waves, the method includes: according to carrier wave number of configured multiple carrier waves, signal bandwidth and occupied bandwidth of each carrier wave, obtaining total signal bandwidth and total occupied bandwidth of the corresponding carrier waves; according to the total signal bandwidth and the total occupied bandwidth of the multiple carrier waves, generating a digital filter with set order, and obtaining filter coefficient of the digital filter; taking the filter coefficient as a peak clipping coefficient and using the peak clipping coefficient to perform peak clipping to the peak-to-average ratio signals of the carrier waves. By the disclosure, the complexity of the generation of the peak clipping coefficient is simplified, the deterioration degree of EVM is reduced, and the distortion degree of signals is also reduced.Type: GrantFiled: August 28, 2014Date of Patent: November 15, 2016Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTDInventors: Jun Xiong, Yanhui He, Huarong Sun, Tao Duan, Jieli Wang, Ce Wang
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Publication number: 20160329927Abstract: The present application relates to the field of digital pre-distortion processing. Disclosed in an embodiment of the present application are a pre-distortion parameter obtaining method and pre-distortion system for simplifying calculating complexity of a model while achieving good signal processing effect. The method comprises: after the beginning of periodic filtering processing, obtaining a pre-distorted signal after pre-distortion processing and a first feedback signal after power amplification (S101); obtaining a second feedback signal by eliminating the rated linear gain of the first feedback signal (S102); determining a pre-distortion parameter according to a matrix formed by the second feedback signal and a matrix formed by the pre-distorted signal (S103); updating the pre-distortion parameter index table according to the determined pre-distortion parameter (104).Type: ApplicationFiled: December 24, 2014Publication date: November 10, 2016Inventors: Jun Xiong, Xinmin Wang, Tao Duan, Jingyi Wang
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Patent number: 9445375Abstract: The invention is a method and a system for updating pre-distortion coefficients, which is used to solve the problem of interference with neighbor cells due to the inferior pre-distortion coefficients. The method includes: presetting a primary table and a standby table, which store default and updated pre-distortion coefficients respectively; when a data source of a pre-distortion processor adopts the standby table, adopting the updated pre-distortion coefficients to perform parameter output processing to acquire pre-distortion parameters, and conveying the pre-distortion parameters and an input signal to the pre-distortion processor to process to acquire pre-distortion signals; conveying the pre-distortion signals through various signal processors to acquire a first signal, and determining the power data of the first signal; and based on the comparing result of the power data of the first signal and a setting range, there are different actions.Type: GrantFiled: December 30, 2013Date of Patent: September 13, 2016Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.Inventors: Jun Xiong, Tao Duan, Huarong Sun, Peng Xiao, Ce Wang, Jieli Wang
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Publication number: 20160212002Abstract: The disclosure discloses a method and device for performing peak clipping to multiple carrier waves, the method includes: according to carrier wave number of configured multiple carrier waves, signal bandwidth and occupied bandwidth of each carrier wave, obtaining total signal bandwidth and total occupied bandwidth of the corresponding carrier waves; according to the total signal bandwidth and the total occupied bandwidth of the multiple carrier waves, generating a digital filter with set order, and obtaining filter coefficient of the digital filter; taking the filter coefficient as a peak clipping coefficient and using the peak clipping coefficient to perform peak clipping to the peak-to-average ratio signals of the carrier waves. By the disclosure, the complexity of the generation of the peak clipping coefficient is simplified, the deterioration degree of EVM is reduced, and the distortion degree of signals is also reduced.Type: ApplicationFiled: August 28, 2014Publication date: July 21, 2016Applicant: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTDInventors: Jun XIONG, Yanhui HE, Huarong SUN, Tao DUAN, Jieli Wang, Ce WANG
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Patent number: 9231733Abstract: Disclosed are a method and a system for updating a multi-frequency band pre-distortion coefficient lookup table, in order to solve the problems that the calculation complexity is high. Wherein, the method comprises: collecting a first frequency band reference signal and a first frequency band feedback signal, a second frequency band reference signal and a second frequency band feedback signal; calculating a first frequency band pre-distortion coefficient and a second frequency band pre-distortion coefficient; performing phase calibration on the first frequency band pre-distortion coefficient and the second frequency band pre-distortion coefficient, respectively; and updating a first lookup table according to the first frequency band pre-distortion coefficient performed the phase calibration, and updating a second lookup table according to the second frequency band pre-distortion coefficient performed the phase calibration.Type: GrantFiled: July 17, 2013Date of Patent: January 5, 2016Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTDInventors: Jun Xiong, Tao Duan, Huarong Sun, Peng Xiao