Patents by Inventor Yuemin Cai
Yuemin Cai 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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Patent number: 8812038Abstract: The examples of the present invention disclose an anti-interference method and device in a common-frequency networking mobile communication system. The method includes: creating a candidate cell list according to probability that each adjacent cell of a current cell interferes with the current cell; selecting a selected cell list from the candidate cell list according to the probability; performing channel estimation for adjacent cells in the selected cell list, obtaining current signal power of each adjacent cell in the selected cell list according to a channel estimation result, and selecting a detected cell list from the selected cell list according to the signal power; and performing joint detection for adjacent cells in the detected cell list to eliminate interference of the adjacent cells in the detected cell list on the current cell.Type: GrantFiled: July 15, 2010Date of Patent: August 19, 2014Assignee: China Academy of Telecommunications TechnologyInventors: Dongsheng Sang, Yuemin Cai, Hongyan Xu, Shaoli Kang
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Patent number: 8666327Abstract: A method and device for frequency deviation pre-correction are provided. The method includes: estimating an uplink frequency deviation value of a terminal, and obtaining a historic value of the uplink frequency deviation pre-correction that has been used for the frequency deviation pre-correction of the terminal; according to the historic value of the uplink frequency deviation pre-correction, determining a current value of the uplink frequency deviation pre-correction of the terminal, the current value of the uplink frequency deviation pre-correction being closer to the uplink frequency deviation value than the historic value of the uplink frequency deviation pre-correction; by using the current value of the uplink frequency deviation pre-correction, pre-correcting the frequency deviation of the terminal, thereby the signal detection performance of the terminal can be effectively improved.Type: GrantFiled: July 13, 2010Date of Patent: March 4, 2014Assignee: China Academy of Telecommunications TechnologyInventors: Dongsheng Sang, Yuemin Cai, Xiangqian Zhu, Haijun Zhou
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Patent number: 8526537Abstract: This invention discloses a for digital pre-distortion processing method and apparatus, the method including that: training signals are sent to at least one radio frequency front-end device as needed (201); the output training signals of the radio frequency front-end devices are collected through a feedback channel as needed (202); digital pre-distortion (DPD) coefficients of the radio frequency front-end devices are trained as needed (203); after the coefficient training is completed, the DPD coefficients of the corresponding radio frequency front-end devices are updated as needed. There is no need to track the variation of the signals all the time and to compare the signals with a long-time statistical signal template to trigger the training in the invention.Type: GrantFiled: February 16, 2011Date of Patent: September 3, 2013Assignee: China Academy of Telecommunications TechnologyInventors: Dong Chen, Yuemin Cai, Shaoli Kang
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Patent number: 8451765Abstract: A method includes: sending, by an RNC, MBMS data to base stations of the target cells or sectors, distributing the same time and frequency resources, scrambling code and midamble to the cells or sectors to transmit the MBMS data, sending information of the distributed resources, scrambling code and midamble to the base stations and UEs of the target cells or sectors; and rotating, by each of the base stations, the MBMS burst signal to be sent by a random phase, sending the rotated signal to the UE using time and frequency resources distributed by RNC. A system includes an RNC, base stations and a UE, and each of the base stations includes a phase processing module and a signal sending module.Type: GrantFiled: March 20, 2008Date of Patent: May 28, 2013Assignee: China Academy of Telecommunications TechnologyInventors: Yingmin Wang, Yu Ding, Hongyan Xu, Shiyan Ren, Yuemin Cai
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Patent number: 8401124Abstract: A method for detecting pilot sequence signal includes: when the service data signal in the received signal is confirmed to be right, the said service data signal is extracted from the received signal, wherein, the service data signal and the pilot sequence signal in the received signal are located in the same slot; the pilot sequence signal is obtained from the received signal having been extracted the service data signal. At the same time, a communication device and a communication system are provided. The interference of pilot sequence signal made by the service data signal can be restrained, the detecting performance of the pilot sequence can be enhanced by using the present invention.Type: GrantFiled: May 27, 2008Date of Patent: March 19, 2013Assignee: China Academy of Telecommunications TechnologyInventors: Hongyan Xu, Kewei Wu, Yinxiang Zheng, Yuemin Cai
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Publication number: 20120321018Abstract: This invention discloses a for digital pre-distortion processing method and apparatus, the method including that: training signals are sent to at least one radio frequency front-end device as needed (201); the output training signals of the radio frequency front-end devices are collected through a feedback channel as needed (202); digital pre-distortion (DPD) coefficients of the radio frequency front-end devices are trained as needed (203); after the coefficient training is completed, the DPD coefficients of the corresponding radio frequency front-end devices are updated as needed. There is no need to track the variation of the signals all the time and to compare the signals with a long-time statistical signal template to trigger the training in the invention.Type: ApplicationFiled: February 16, 2011Publication date: December 20, 2012Applicant: CHINA ACADEMY OF TELECOMMUNICTIONS TECHNOLOGYInventors: Dong Chen, Yuemin Cai, Shaoli Kang
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Patent number: 8306006Abstract: A resource allocation method based on block repeat division multiple access, involves the steps of: distributing the usable BRBG according to the service requirement of a user; distributing RC series for the said distributed BRBG. The present invention also provides a resource management method based on block repeat division multiple access, which involves the steps of: detecting the operation environment in a district for a period of time; adjusting the number of the BRB in the BRBG of the district, according to the operation environment of the district. The present invention also provides the resource allocation/management device based on block repeat division multiple access.Type: GrantFiled: September 28, 2008Date of Patent: November 6, 2012Assignee: China Academy of Telecommunications TechnologyInventors: Yuemin Cai, Yingmin Wang, Shaohui Sun, Hai Tang
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Patent number: 8300592Abstract: A signal transmission method, which includes: each data symbol needing to be transmitted is weighted and repeatedly extended to obtain the extended data symbol of each data symbol; the extended data symbol of each data symbol and the pilot frequency symbol are modulated and mapped to the specified time-frequency locations of each corresponding block repeat resource block to obtain each corresponding repeat data unit block; each repeat data unit block is transmitted. A signal transmission device is also disclosed in the present invention.Type: GrantFiled: October 7, 2008Date of Patent: October 30, 2012Assignee: China Academy of Telecommunications TechnologyInventors: Shaohui Sun, Yingmin Wang, Hai Tang, Yuemin Cai
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Patent number: 8289919Abstract: A method, apparatus and system for transmitting signal, the method includes: using the weighting factor sequence, processing weighting repeating modulation for the basic cell block mapped by the data symbol block at the sending end, and obtaining a plurality of the repeating cell blocks corresponding to the said basic cell block; the sending end maps each repeating cell block to the appointed time-frequency position respectively, then sends the signals in the said time-frequency position; and the receiving end demodulates the plurality of data symbol blocks from the blocks, and incorporates the plurality of data symbol blocks; the said receiving end demodulates the incorporated data symbol blocks, and generates the received data. This scheme can be called for short as the block repeating spread diversity transmission technology, it is based on the information symbol in the time-frequency domain two-dimensional grid point.Type: GrantFiled: February 3, 2008Date of Patent: October 16, 2012Assignee: China Academy of Telecommunications TechnologyInventors: Yingmin Wang, Shaohui Sun, Yongbin Xie, Yuemin Cai, Hai Tang
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Publication number: 20120122504Abstract: The examples of the present invention disclose an anti-interference method and device in a common-frequency networking mobile communication system. The method includes: creating a candidate cell list according to probability that each adjacent cell of a current cell interferes with the current cell; selecting a selected cell list from the candidate cell list according to the probability; performing channel estimation for adjacent cells in the selected cell list, obtaining current signal power of each adjacent cell in the selected cell list according to a channel estimation result, and selecting a detected cell list from the selected cell list according to the signal power; and performing joint detection for adjacent cells in the detected cell list to eliminate interference of the adjacent cells in the detected cell list on the current cell.Type: ApplicationFiled: July 15, 2010Publication date: May 17, 2012Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Dongsheng Sang, Yuemin Cai, Hongyan Xu, Shaoli Kang
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Publication number: 20120115423Abstract: A method and device for frequency deviation pre-correction are provided. The method includes: estimating an uplink frequency deviation value of a terminal, and obtaining a historic value of the uplink frequency deviation pre-correction that has been used for the frequency deviation pre-correction of the terminal; according to the historic value of the uplink frequency deviation pre-correction, determining a current value of the uplink frequency deviation pre-correction of the terminal, the current value of the uplink frequency deviation pre-correction being closer to the uplink frequency deviation value than the historic value of the uplink frequency deviation pre-correction; by using the current value of the uplink frequency deviation pre-correction, pre-correcting the frequency deviation of the terminal, thereby the signal detection performance of the terminal can be effectively improved.Type: ApplicationFiled: July 13, 2010Publication date: May 10, 2012Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Dongsheng Sang, Yuemin Cai, Xiangqian Zhu, Haijun Zhou
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Publication number: 20100254341Abstract: A signal transmission method, which includes: each data symbol needing to be transmitted is weighted and repeatedly extended to obtain the extended data symbol of each data symbol; the extended data symbol of each data symbol and the pilot frequency symbol are modulated and mapped to the specified time-frequency locations of each corresponding block repeat resource block to obtain each corresponding repeat data unit block; each repeat data unit block is transmitted. A signal transmission device is also disclosed in the present invention.Type: ApplicationFiled: October 7, 2008Publication date: October 7, 2010Applicant: DA TANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.Inventors: Shaohui Sun, Yingmin Wang, Hai Tang, Yuemin Cai
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Publication number: 20100214915Abstract: A resource allocation method based on block repeat division multiple access, involves the steps of: distributing the usable BRBG according to the service requirement of a user; distributing RC series for the said distributed BRBG. The present invention also provides a resource management method based on block repeat division multiple access, which involves the steps of: detecting the operation environment in a district for a period of time; adjusting the number of the BRB in the BRBG of the district, according to the operation environment of the district. The present invention also provides the resource allocation/management device based on block repeat division multiple access.Type: ApplicationFiled: September 28, 2008Publication date: August 26, 2010Applicant: DA TANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.Inventors: Yuemin Cai, Yingmin Wang, Shaohui Sun, Hai Tang
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Publication number: 20100189165Abstract: A method for detecting pilot sequence signal includes: when the service data signal in the received signal is confirmed to be right, the said service data signal is extracted from the received signal, wherein, the service data signal and the pilot sequence signal in the received signal are located in the same slot; the pilot sequence signal is obtained from the received signal having been extracted the service data signal. At the same time, a communication device and a communication system are provided. The interference of pilot sequence signal made by the service data signal can be restrained, the detecting performance of the pilot sequence can be enhanced by using the present invention.Type: ApplicationFiled: May 27, 2008Publication date: July 29, 2010Applicant: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTDInventors: Hongyan Xu, Kewei Wu, Yinxiang Zheng, Yuemin Cai
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Publication number: 20100103855Abstract: A method, system and base station for transmitting MBMS in a single frequency network are provided. The method includes: sending, by an RNC, MBMS data to base stations of the target cells or sectors, distributing the same time and frequency resources, scrambling code and midamble to the cells or sectors to transmit the MBMS data, sending information of the distributed resources, scrambling code and midamble to the base stations and UEs of the target cells or sectors; and rotating, by each of the base stations, the MBMS burst signal to be sent by a random phase, sending the rotated signal to the UE using time and frequency resources distributed by RNC. The system includes an RNC, base stations and a UE, and each of the base stations includes a phase processing module and a signal sending module.Type: ApplicationFiled: March 20, 2008Publication date: April 29, 2010Applicant: DATING MOBILE COMMUNICATIONS EQUIPMENT CO., LTDInventors: Yingmin Wang, Yu Ding, Hongyan Xu, Shiyan Ren, Yuemin Cai