Patents by Inventor Yangzhong Yao
Yangzhong Yao 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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Method and apparatus for estimating frequency offset, electronic device and computer-readable medium
Patent number: 11894966Abstract: The present disclosure provides a method for estimating a frequency offset, including: extracting sampling points from an input signal according to preset intervals to obtain a plurality of groups of sampling points, with the preset intervals of the groups of sampling points being different; performing processes on a current sampling point and the groups of sampling points to obtain data of arguments of complex numbers corresponding to the preset intervals; and determining an estimation value of a frequency offset of a current input signal according to the data of arguments of complex numbers corresponding to the preset intervals. The present disclosure further provides an apparatus for estimating a frequency offset, an electronic device and a computer-readable medium.Type: GrantFiled: April 2, 2021Date of Patent: February 6, 2024Assignee: SANECHIPS TECHNOLOGY CO., LTD.Inventors: Shuangxi Li, Yangzhong Yao, Nanshan Cao, Yunpeng Li -
METHOD AND APPARATUS FOR ESTIMATING FREQUENCY OFFSET, ELECTRONIC DEVICE AND COMPUTER-READABLE MEDIUM
Publication number: 20230144980Abstract: The present disclosure provides a method for estimating a frequency offset, including: extracting sampling points from an input signal according to preset intervals to obtain a plurality of groups of sampling points, with the preset intervals of the groups of sampling points being different; performing processes on a current sampling point and the groups of sampling points to obtain data of arguments of complex numbers corresponding to the preset intervals; and determining an estimation value of a frequency offset of a current input signal according to the data of arguments of complex numbers corresponding to the preset intervals. The present disclosure further provides an apparatus for estimating a frequency offset, an electronic device and a computer-readable medium.Type: ApplicationFiled: April 2, 2021Publication date: May 11, 2023Inventors: Shuangxi LI, Yangzhong YAO, Nanshan CAO, Yunpeng LI -
Publication number: 20220407678Abstract: The present disclosure provides a signal sampling method and apparatus, and an optical receiver. The method includes sampling a burst signal that is received according to a first sampling frequency to obtain a first sampling signal; sampling a preamble signal in the first sampling signal according to a second sampling frequency to obtain a second sampling signal; determining a phase difference between the burst signal and a local sampling clock corresponding to the first sampling frequency according to the second sampling signal; and interpolating the first sampling signal according to the phase difference to obtain a target sampling signal.Type: ApplicationFiled: September 23, 2020Publication date: December 22, 2022Inventors: Guohua GU, Yangzhong YAO, Nanshan CAO, Chungui TAO
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Patent number: 10135543Abstract: A clock recovery method is provided. The method has the following operations: performing clock balance pre-filtering on an input time/frequency domain signal according to a self-adaptive balance coefficient input currently, to obtain a balance pre-filtering signal; according to the balance pre-filtering signal, acquiring a phase error of the input time/frequency domain signal; and performing phase adjustment on the input time/frequency domain signal according to the phase error, and outputting a new self-adaptive balance coefficient after self-adaptive balance processing is performed on the phase-adjusted time/frequency domain signal. A clock recovery device and system and a non-transitory computer-readable storage medium are also provided.Type: GrantFiled: April 1, 2014Date of Patent: November 20, 2018Assignee: SANECHIPS TECHNOLOGY CO., LTD.Inventors: Yangzhong Yao, Yi Cai, Yunpeng Li, Guohua Gu, Wei Ren
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Patent number: 9929801Abstract: A chromatic dispersion measurement method is provided. According to the method, chromatic dispersion sequence processing is performed on acquired frequency domain data to obtain chromatic dispersion sequences of frequency domain data. A correlation operation on the obtained chromatic dispersion sequences is separately performed at a preset interval. A sum of obtained correlation values is calculated to obtain a first value. A chromatic dispersion value is determined according to the first value, a frequency value per unit frequency interval of the frequency domain data and the preset interval. In this way, the chromatic dispersion value can be accurately determined, and the processing efficiency is high.Type: GrantFiled: April 1, 2014Date of Patent: March 27, 2018Assignee: SANECHIPS TECHNOLOGY CO., LTD.Inventors: Yangzhong Yao, Yunpeng Li, Yi Cai, Weiqin Zhou, Zhensheng Jia
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Patent number: 9729232Abstract: Disclosed are a chromatic dispersion estimation method and device in optical coherent communication, wherein, the method includes: performing a fast Fourier transform on IQ-imbalance compensated data to obtain frequency-domain data in two polarization directions; calculating autocorrelation sequences of the frequency-domain data and performing an inverse fast Fourier transform on the values of the autocorrelation sequences; calculating modulus squares of the results of the inverse fast Fourier transform, and adding the results in the two polarization directions to obtain; determining a mean value of s of a plurality of data sets; calculating an index of the maximum value of, and estimating a dispersion value of the optical fiber link according to the index of the maximum value of. The abovementioned technical solution allows a significantly accurate and rapid estimation of dispersion values.Type: GrantFiled: May 23, 2014Date of Patent: August 8, 2017Assignees: ZTE CORPORATION, Sanechips Technology Co., Ltd.Inventors: Yangzhong Yao, Qiang Li, Yunpeng Li, Guohua Gu, Wei Ren
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Publication number: 20160329970Abstract: A clock recovery method is provided. The method has the following operations: performing clock balance pre-filtering on an input time/frequency domain signal according to a self-adaptive balance coefficient input currently, to obtain a balance pre-filtering signal; according to the balance pre-filtering signal, acquiring a phase error of the input time/frequency domain signal; and performing phase adjustment on the input time/frequency domain signal according to the phase error, and outputting a new self-adaptive balance coefficient after self-adaptive balance processing is performed on the phase-adjusted time/frequency domain signal. A clock recovery device and system and a non-transitory computer-readable storage medium are also provided.Type: ApplicationFiled: April 1, 2014Publication date: November 10, 2016Applicant: ZHONGXING MICROELECTRONICS TECHNOLOGY CO. LTDInventors: Yangzhong YAO, Yi CAI, Yunpeng LI, Guohua GU, Wei REN
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Publication number: 20160329960Abstract: A chromatic dispersion measurement method is provided. According to the method, chromatic dispersion sequence processing is performed on acquired frequency domain data to obtain chromatic dispersion sequences of frequency domain data. A correlation operation on the obtained chromatic dispersion sequences is separately performed at a preset interval. A sum of obtained correlation values is calculated to obtain a first value. A chromatic dispersion value is determined according to the first value, a frequency value per unit frequency interval of the frequency domain data and the preset interval. In this way, the chromatic dispersion value can be accurately determined, and the processing efficiency is high.Type: ApplicationFiled: April 1, 2014Publication date: November 10, 2016Applicant: ZHONGXING MICROELECTRONICS TECHNOLOGY CO. LTDInventors: Yangzhong YAO, Yunpeng LI, Yi CAI, Weiqin ZHOU, Zhensheng JIA
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Publication number: 20160269108Abstract: Disclosed are a chromatic dispersion estimation method and device in optical coherent communication, wherein, the method includes: performing a fast Fourier transform on IQ-imbalance compensated data to obtain frequency-domain data in two polarization directions; calculating autocorrelation sequences of the frequency-domain data and performing an inverse fast Fourier transform on the values of the autocorrelation sequences; calculating modulus squares of the results of the inverse fast Fourier transform, and adding the results in the two polarization directions to obtain; determining a mean value of s of a plurality of data sets; calculating an index of the maximum value of, and estimating a dispersion value of the optical fiber link according to the index of the maximum value of. The abovementioned technical solution allows a significantly accurate and rapid estimation of dispersion values.Type: ApplicationFiled: May 23, 2014Publication date: September 15, 2016Applicant: ZTE CORPORATIONInventors: Yangzhong YAO, Qiang LI, Yunpeng LI, Guohua GU, Wei REN
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Patent number: 8667378Abstract: Disclosed are a decoding method and device for concatenated code, for the decoding of concatenated code composed of low density parity code (LDPC) and Reed-Solomon (RS) code. The method includes carrying out LDPC soft decision iterative decoding on bit de-interleaved data flow, and carrying out check decision on LDPC codeword obtained from decoding by using a check matrix; carrying out de-byte-interleave on an information bit of the LDPC codeword obtained from decoding and converting check information of the LDPC codeword into puncturing information of RS codeword; selecting a decoding mode according to the puncturing information of the RS codeword to carry out RS decoding. By way of the solution of the present invention, the RS decoding performance can be improved without increasing the computation complexity, thus greatly improving the receiving performance of the CMMB terminal as compared to the conventional method.Type: GrantFiled: October 22, 2010Date of Patent: March 4, 2014Assignee: ZTE CorporationInventors: Tao Zhang, Yueyi You, Nanshan Cao, Yangzhong Yao
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Publication number: 20120284584Abstract: Disclosed are a decoding method and device for concatenated code, for the decoding of concatenated code composed of low density parity code (LDPC) and Reed-Solomon (RS) code. The method includes: carrying out LDPC soft decision iterative decoding on bit de-interleaved data flow, and carrying out check decision on LDPC codeword obtained from decoding by using a check matrix; carrying out de-byte-interleave on an information bit of the LDPC codeword obtained from decoding and converting check information of the LDPC codeword into puncturing information of RS codeword; selecting a decoding mode according to the puncturing information of the RS codeword to carry out RS decoding. By way of the solution of the present invention, the RS decoding performance can be improved without increasing the computation complexity, thus greatly improving the receiving performance of the CMMB terminal as compared to the conventional method.Type: ApplicationFiled: October 22, 2010Publication date: November 8, 2012Inventors: Tao Zhang, Yueyi You, Nanshan Cao, Yangzhong Yao