Patents by Inventor Yunbao Zeng
Yunbao Zeng 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: 10187243Abstract: The present invention discloses a preamble sequence generating method and device, which are used to avoid a problem, caused by damages to a preamble sequence resulting from interference in an NB-PLC system, that it is difficult for a receive end to correctly perform timing synchronization. The method includes: determining a quantity m of orthogonal frequency division multiplexing OFDM symbols that constitute a single pattern in a preamble sequence, where m is not less than 2; and generating a preamble sequence according to m, so that every m OFDM symbols that are in the generated preamble sequence and consecutive in a time domain constitute a single pattern, and the generated preamble sequence includes at least two patterns, where the patterns are different from each other. Embodiments of the present invention further provide a timing synchronization method and device.Type: GrantFiled: May 26, 2016Date of Patent: January 22, 2019Assignee: Huawei Technologies Co., Ltd.Inventors: Wei Zhu, Yunbao Zeng, Hui Zhao, Long Zhao
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Publication number: 20160277230Abstract: The present invention discloses a preamble sequence generating method and device, which are used to avoid a problem, caused by damages to a preamble sequence resulting from interference in an NB-PLC system, that it is difficult for a receive end to correctly perform timing synchronization. The method includes: determining a quantity m of orthogonal frequency division multiplexing OFDM symbols that constitute a single pattern in a preamble sequence, where m is not less than 2; and generating a preamble sequence according to m, so that every m OFDM symbols that are in the generated preamble sequence and consecutive in a time domain constitute a single pattern, and the generated preamble sequence includes at least two patterns, where the patterns are different from each other. Embodiments of the present invention further provide a timing synchronization method and device.Type: ApplicationFiled: May 26, 2016Publication date: September 22, 2016Inventors: Wei Zhu, Yunbao Zeng, Liangchuan Kang, Hui Zhao, Long Zhao
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Patent number: 8855251Abstract: A power adjusting method and apparatus provided by embodiments of the present invention relate to the field of communications. The power adjusting method of this embodiment includes: receiving a signal from a sending end, where the signal includes a cyclic prefix (CP) signal; detecting and acquiring first receiving power and second receiving power of the CP signal, where the first receiving power is average power of N sampling points of the CP signal, and the second receiving power is average power of M sampling points of the CP signal; after determining that a ratio of the first receiving power to target power is greater than a first preset threshold, adjusting signal power magnification; and after determining that the ratio of the second receiving power to the target power is greater than a second preset threshold, adjusting the signal power magnification again.Type: GrantFiled: April 15, 2013Date of Patent: October 7, 2014Assignee: Huawei Technologies Co., Ltd.Inventors: Yunbao Zeng, Chengquan Huang
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Patent number: 8818313Abstract: The present invention relates to the field of communication technologies and discloses a method and an apparatus for auto gain control (AGC) in a radio receiver, which can ensure that a radio frequency device, an analog device, and various nodes in a digital domain are non-saturated and that useful signal power is adjusted to a certain power level. According to the present invention, total signal power on an air interface is subtracted from a preset first target power to obtain an analog auto gain control (AAGC) gain, and then a second target power is subtracted from an interference signal power in a digital baseband to obtain a digital auto gain control (DAGC) gain.Type: GrantFiled: August 12, 2013Date of Patent: August 26, 2014Assignee: Huawei Technologies Co., Ltd.Inventors: Jianhua Qin, Junshi Chen, Yunbao Zeng
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Publication number: 20130324065Abstract: The present invention relates to the field of communication technologies and discloses a method and an apparatus for auto gain control (AGC) in a radio receiver, which can ensure that a radio frequency device, an analog device, and various nodes in a digital domain are non-saturated and that useful signal power is adjusted to a certain power level. According to the present invention, total signal power on an air interface is subtracted from a preset first target power to obtain an analog auto gain control (AAGC) gain, and then a second target power is subtracted from an interference signal power in a digital baseband to obtain a digital auto gain control (DAGC) gain.Type: ApplicationFiled: August 12, 2013Publication date: December 5, 2013Applicant: Huawei Technologies Co., Ltd.Inventors: Jianhua Qin, Junshi Chen, Yunbao Zeng
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Publication number: 20130301763Abstract: A power adjusting method and apparatus provided by embodiments of the present invention relate to the field of communications. The power adjusting method of this embodiment includes: receiving a signal from a sending end, where the signal includes a cyclic prefix (CP) signal; detecting and acquiring first receiving power and second receiving power of the CP signal, where the first receiving power is average power of N sampling points of the CP signal, and the second receiving power is average power of M sampling points of the CP signal; after determining that a ratio of the first receiving power to target power is greater than a first preset threshold, adjusting signal power magnification; and after determining that the ratio of the second receiving power to the target power is greater than a second preset threshold, adjusting the signal power magnification again.Type: ApplicationFiled: April 15, 2013Publication date: November 14, 2013Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yunbao ZENG, Chengquan HUANG
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Patent number: 8477726Abstract: A method, system and device for MS handover are provided in an embodiment of the present invention. The method includes: receiving the handover-assisting information from the RS by the serving MR-BS; determining whether to recommend the RS to the MS as the target station according to the handover-assisting information by the serving MR-BS. The embodiments of the present invention enable the serving MR-BS to obtain related information from the RS and the serving MR-BS of the MS to better ascertain the potential target station and related information to be recommended to the MS. This helps improve the handover performance of the MS and reduce the failure rate.Type: GrantFiled: June 24, 2010Date of Patent: July 2, 2013Assignee: Huawei Technologies Co., Ltd.Inventors: Ting Li, Yunbao Zeng, Liangliang Zhang
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Method and device for correcting IQ imbalance of baseband signals in wireless communication receiver
Patent number: 8446995Abstract: A method and a device for correcting In-phase/Quadrature (IQ) imbalance in baseband signals of a wireless communication receiver are disclosed. The method includes the following: the receiver receives Radio Frequency (RF) signals, and processes the signals to generate In-phase (I) signals and Quadrature (Q) signals; the receiver calculates to obtain an autocorrelation value E(|I|2) of the I signal, an autocorrelation value E(|Q|2) of a current Q signal, and a cross-correlation value E(IQ) of the I signal and the current Q signal; the receiver computes E(|I|2), (|Q|2) and E(IQ) through arithmetical operations to obtain an estimate value Ân of a current amplitude imbalance calibration factor and an estimate value {circumflex over (P)}n of a current phase imbalance calibration factor; and the receiver corrects the current Q signal according to Ân and {circumflex over (P)}n. The embodiments reduce operations.Type: GrantFiled: March 4, 2011Date of Patent: May 21, 2013Assignee: Huawei Technologies Co., Ltd.Inventor: Yunbao Zeng -
Patent number: 8312358Abstract: A tail-biting decoding method and device are provided, so as to improve accuracy of backtracking state determination and decrease decoding delay. The method includes the following steps. Survivor paths of a training system are acquired. The training system is formed of a first transport block and a second transport block connected in series. The number of the survivor paths passing through each first state of the second transport block is counted. A first state having a maximum number of the survivor paths may be selected as a backtracking state of the second transport block. Backtracking decoding is performed on the second transport block by using the survivor paths on the backtracking state, so as to obtain a decoding result.Type: GrantFiled: August 27, 2010Date of Patent: November 13, 2012Assignee: Huawei Technologies Co., Ltd.Inventors: Yunbao Zeng, Jingxin Wei
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METHOD AND DEVICE FOR CORRECTING IQ IMBALANCE OF BASEBAND SIGNALS IN WIRELESS COMMUNICATION RECEIVER
Publication number: 20110216858Abstract: A method and a device for correcting In-phase/Quadrature (IQ) imbalance in baseband signals of a wireless communication receiver are disclosed. The method includes the following: the receiver receives Radio Frequency (RF) signals, and processes the signals to generate In-phase (I) signals and Quadrature (Q) signals; the receiver calculates to obtain an autocorrelation value E(|I|2) of the I signal, an autocorrelation value E(|Q|2) of a current Q signal, and a cross-correlation value E(IQ) of the I signal and the current Q signal; the receiver computes E(|I|2), (|Q|2) and E(IQ) through arithmetical operations to obtain an estimate value Ân of a current amplitude imbalance calibration factor and an estimate value {circumflex over (P)}n of a current phase imbalance calibration factor; and the receiver corrects the current Q signal according to Ân and {circumflex over (P)}n. The embodiments reduce operations.Type: ApplicationFiled: March 4, 2011Publication date: September 8, 2011Applicant: Huawei Technologies Co., Ltd.Inventor: Yunbao Zeng -
Publication number: 20110060971Abstract: A tail-biting decoding method and device are provided, so as to improve accuracy of backtracking state determination and decrease decoding delay. The method includes the following steps. Survivor paths of a training system are acquired. The training system is formed of a first transport block and a second transport block connected in series. The number of the survivor paths passing through each first state of the second transport block is counted. A first state having a maximum number of the survivor paths may be selected as a backtracking state of the second transport block. Backtracking decoding is performed on the second transport block by using the survivor paths on the backtracking state, so as to obtain a decoding result.Type: ApplicationFiled: August 27, 2010Publication date: March 10, 2011Applicant: HUAWEI TECHNOLOGIES CO., LTDInventors: Yunbao ZENG, Jingxin Wei
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Publication number: 20100278097Abstract: A method, system and device for MS handover are provided in an embodiment of the present invention. The method includes: receiving the handover-assisting information from the RS by the serving MR-BS; determining whether to recommend the RS to the MS as the target station according to the handover-assisting information by the serving MR-BS. The embodiments of the present invention enable the serving MR-BS to obtain related information from the RS and the serving MR-BS of the MS to better ascertain the potential target station and related information to be recommended to the MS. This helps improve the handover performance of the MS and reduce the failure rate.Type: ApplicationFiled: June 24, 2010Publication date: November 4, 2010Inventors: Ting Li, Yunbao Zeng, Liangliang Zhang