Patents by Inventor Yuanjie Chen
Yuanjie Chen 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: 11876532Abstract: A method for determining a bit-error rate in data received on high-speed data channel that uses a forward-error-correcting decoder includes receiving at receiver circuitry on the high-speed data channel a received predetermined data pattern, comparing, bit-wise, the received predetermined data pattern to a locally generated copy of the predetermined data pattern to derive output bits representing whether there was an error in a corresponding bit of the received predetermined data pattern, to determine error bits in the received predetermined data pattern, grouping output bits from the comparing into symbols and codewords, and for each codeword for which a count of symbols containing errors exceeds a number of symbols correctable by the forward-error-correcting decoder, counting a total number of bit errors contained in the symbols containing errors, for use in adjusting the receiver circuitry in response to the total number of bit errors.Type: GrantFiled: July 27, 2022Date of Patent: January 16, 2024Assignee: Marvell Asia Pte LtdInventors: Yuanjie Chen, Davide Visani, Min Wu
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Publication number: 20230354443Abstract: A wireless device snooping method includes: a first wireless device establishing a wireless link connection with a data source end, and generating corresponding wireless link parameter(s); and the first wireless device broadcasting the wireless link parameter(s) to trigger at least one second wireless device to receive the wireless link parameter(s) and snoop the wireless link on the basis of the wireless link parameter(s). In this way, in the present disclosure, the first wireless device transmits the wireless link parameter(s) to at least one second wireless device by means of broadcast, thereby breaking through the limitation in the number of second wireless devices, so that a plurality of second wireless devices simultaneously snoop a wireless link, improving the real-time performance and reliability of transmission.Type: ApplicationFiled: September 29, 2020Publication date: November 2, 2023Inventor: Yuanjie CHEN
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Patent number: 9025969Abstract: An optical signal receiver tracks local oscillator frequency offset (LOFO) and compensates for the phase distortion introduced in the received signals as a result of utilizing the local oscillator within a coherent detection scheme. This phase distortion is basically a constant phase rotation caused by the LOFO and implementation of the receiver using coherent detection and a digital interferometer instead of a conventional (yet complex) carrier phase estimation or recovery scheme. With an optical receiver implemented in this manner, the requirement of using a precise local oscillator laser with low frequency offset is less important.Type: GrantFiled: May 24, 2012Date of Patent: May 5, 2015Assignee: Futurewei Technologies, Inc.Inventors: Chuandong Li, Yuanjie Chen, Zhuhong Zhang, Yi Cai, Fei Zhu
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Patent number: 8738956Abstract: An apparatus comprising an analog-to-digital converter (ADC); a frequency-domain equalizer (FDEQ); a time-domain interpolator positioned between the ADC and the FDEQ, wherein the time domain interpolator is coupled to the ADC and the FDEQ and configured to perform a time-domain interpolation to compensate a signal sample for a plurality of ADC induced changes.Type: GrantFiled: April 28, 2011Date of Patent: May 27, 2014Assignee: Futurewei Technologies, Inc.Inventors: Yuanjie Chen, Chuandong Li, Zhuhong Zhang, Fei Zhu, Yu Sheng Bai
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Publication number: 20130315609Abstract: An optical signal receiver tracks local oscillator frequency offset (LOFO) and compensates for the phase distortion introduced in the received signals as a result of utilizing the local oscillator within a coherent detection scheme. This phase distortion is basically a constant phase rotation caused by the LOFO and implementation of the receiver using coherent detection and a digital interferometer instead of a conventional (yet complex) carrier phase estimation or recovery scheme. With an optical receiver implemented in this manner, the requirement of using a precise local oscillator laser with low frequency offset is less important.Type: ApplicationFiled: May 24, 2012Publication date: November 28, 2013Applicant: Futurewei Technologies, Inc.Inventors: Chuandong Li, Yuanjie Chen, Zhuhong Zhang, Yi Cai, Fei Zhu
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Patent number: 8391726Abstract: An optical receiver comprising a frame detector configured to receive a polarized signal comprising a first bit stream and a second bit stream, and further configured to identify a plurality of frames in the first bit stream and the second bit stream using a composite header, and a time-domain equalizer (TDEQ) configured to separate the first bit stream and the second bit stream using a portion of the composite header.Type: GrantFiled: February 25, 2010Date of Patent: March 5, 2013Assignee: Futurewei Technologies, Inc.Inventors: Yuanjie Chen, Zhuhong Zhang, Chuandong Li, Fei Zhu, Yu Sheng Bai
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Publication number: 20120274364Abstract: An apparatus comprising an analog-to-digital converter (ADC); a frequency-domain equalizer (FDEQ); a time-domain interpolator positioned between the ADC and the FDEQ, wherein the time domain interpolator is coupled to the ADC and the FDEQ and configured to perform a time-domain interpolation to compensate a signal sample for a plurality of ADC induced changes.Type: ApplicationFiled: April 28, 2011Publication date: November 1, 2012Applicant: FUTUREWEI TECHNOLOGIES, INC.Inventors: Yuanjie Chen, Chuandong Li, Zhuhong Zhang, Fei Zhu, Yu Sheng Bai
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Patent number: 8149904Abstract: Provided is a system and method for a modem including one or more processing paths. Also included is a number of interconnected modules sequentially arrayed along the one or more paths. Each module is configured to (i) process signals passed along the paths in accordance with the sequence and (ii) implement predetermined functions to perform the processing. Further, each of the modules has a particular degree of functional programmability and the degrees of functional programmability monotonically vary in accordance with the sequence.Type: GrantFiled: January 24, 2003Date of Patent: April 3, 2012Assignee: Broadcom CorporationInventors: Gregory H. Efland, Haixiang Liang, Kevin H. Peterson, Yuanjie Chen, Alan G. Corry, Nino P. Ferrario, Jeff Z. Guan, Meera Prahlad, Ilya Stomakhin, Yongbing Wan, Larry C. Yamano, Lin Yin, Gong-San Yu, George A. Papanicolaou
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Publication number: 20110206385Abstract: An optical receiver comprising a frame detector configured to receive a polarized signal comprising a first bit stream and a second bit stream, and further configured to identify a plurality of frames in the first bit stream and the second bit stream using a composite header, and a time-domain equalizer (TDEQ) configured to separate the first bit stream and the second bit stream using a portion of the composite header.Type: ApplicationFiled: February 25, 2010Publication date: August 25, 2011Applicant: Futurewei Technologies, Inc.Inventors: Yuanjie Chen, Zhuhong Zhang, Chuandong Li, Fei Zhu, Yu Sheng Bai
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Patent number: 7957308Abstract: In a DMT based system, training signals can be chosen based on stored prior connection information to reduce using extra tones in transmitted training signals to improve receiver performance. By choosing training signals based on the stored prior connection information, training signals may be made to indirectly represent a function of the loop impairments. Certain training signal tones in the training signals may be omitted, based on previous connection information, on a loop-by-loop basis. Local echoes are effectively reduced and local receiver training is improved without affecting eventual data transmission performance. Higher AGC gain and higher signal-to-quantization-noise ratios can be achieved, especially in the case of long loops. These benefits can allow (1) improvements in the loop performance in the receiving direction and/or (2) reductions in the requirements on the receiving ADC. Crosstalks into other wire pairs of a bundle, are reduced, improving the transmission environment on those pairs.Type: GrantFiled: March 6, 2007Date of Patent: June 7, 2011Assignee: Broadcom CorporationInventor: Yuanjie Chen
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Publication number: 20090316804Abstract: A communications processing device includes a rotor for rotating information associated with ranging subchannels in some symbols; and a single inverse fast Fourier transformer (IFFT), coupled to rotor, for subjecting the rotated information to a single IFFT along with information from all other channels. A method comprising the steps of: rotating information associated with ranging subchannels in some symbols; and subjecting the rotated information to a single IFFT along with information from all other channels.Type: ApplicationFiled: June 20, 2008Publication date: December 24, 2009Applicant: LEGEND SILICON CORP.Inventors: Yuanjie Chen, Lin Yang
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Publication number: 20070171940Abstract: Training signals can be chosen based on stored prior connection information to reduce the use of extra tones in transmitted training signals and thereby improve receiver performance. By choosing training signals based on the stored prior connection information, it is possible to make the training signals indirectly a function of the loop impairments. One advantage of this scheme is that we can choose to omit certain tones in the training signals, based on previous connection information, on a loop-by-loop basis. For example, in an ADSL Transceiver Unit-Central office end (ATU-C) device, per-local-loop prior connection information may be employed to select DMT tones to be included in downstream training signals. Similarly, in an ADSL Transceiver Unit-Remote terminal end (ATU-R) device, prior connection information may be employed to select DMT tones to be included in upstream training signals.Type: ApplicationFiled: March 6, 2007Publication date: July 26, 2007Applicant: Broadcom CorporationInventor: Yuanjie Chen
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Patent number: 7187696Abstract: Training signals can be chosen based on stored prior connection information to reduce the use of extra tones in transmitted training signals and thereby improve receiver performance. By choosing training signals based on the stored prior connection information, it is possible to make the training signals indirectly a function of the loop impairments. One advantage of this scheme is that we can choose to omit certain tones in the training signals, based on previous connection information, on a loop-by-loop basis. For example, in an ADSL Transceiver Unit-Central office end (ATU-C) device, per-local-loop prior connection information may be employed to select DMT tones to be included in downstream training signals. Similarly, in an ADSL Transceiver Unit-Remote terminal end (ATU-R) device, prior connection information may be employed to select DMT tones to be included in upstream training signals.Type: GrantFiled: May 18, 2005Date of Patent: March 6, 2007Assignee: Broadcom CorporationInventor: Yuanjie Chen
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Patent number: 7146391Abstract: Provided is a system and method for a modem including one or more processing paths. Also included is a number of interconnected modules sequentially arrayed along the one or more paths. Each module is configured to (i) process signals passed along the paths in accordance with the sequence and (ii) implement predetermined functions to perform the processing. Further, each of the modules has a particular degree of functional programmability and the degrees of functional programmability monotonically vary in accordance with the sequence.Type: GrantFiled: January 24, 2003Date of Patent: December 5, 2006Assignee: Broadcom CorporationInventors: Gregory H. Efland, Haixiang Liang, Yuanjie Chen
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Publication number: 20050270987Abstract: Training signals can be chosen based on stored prior connection information to reduce the use of extra tones in transmitted training signals and thereby improve receiver performance. By choosing training signals based on the stored prior connection information, it is possible to make the training signals indirectly a function of the loop impairments. One advantage of this scheme is that we can choose to omit certain tones in the training signals, based on previous connection information, on a loop-by-loop basis. For example, in an ADSL Transceiver Unit-Central office end (ATU-C) device, per-local-loop prior connection information may be employed to select DMT tones to be included in downstream training signals. Similarly, in an ADSL Transceiver Unit-Remote terminal end (ATU-R) device, prior connection information may be employed to select DMT tones to be included in upstream training signals.Type: ApplicationFiled: May 18, 2005Publication date: December 8, 2005Inventor: Yuanjie Chen
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Patent number: 6922397Abstract: Training signals can be chosen based on stored prior connection information to reduce the use of extra tones in transmitted training signals and thereby improve receiver performance. By choosing training signals based on the stored prior connection information, it is possible to make the training signals indirectly a function of the loop impairments. One advantage of this scheme is that we can choose to omit certain tones in the training signals, based on previous connection information, on a loop-by-loop basis. For example, in an ADSL Transceiver Unit-Central office end (ATU-C) device, per-local-loop prior connection information may be employed to select DMT tones to be included in downstream training signals. Similarly, in an ADSL Transceiver Unit-Remote terminal end (ATU-R) device, prior connection information may be employed to select DMT tones to be included in upstream training signals.Type: GrantFiled: May 23, 2001Date of Patent: July 26, 2005Assignee: Broadcom CorporationInventor: Yuanjie Chen
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Publication number: 20030225808Abstract: Provided is a system and method for a modem including one or more processing paths. Also included is a number of interconnected modules sequentially arrayed along the one or more paths. Each module is configured to (i) process signals passed along the paths in accordance with the sequence and (ii) implement predetermined functions to perform the processing. Further, each of the modules has a particular degree of functional programmability and the degrees of functional programmability monotonically vary in accordance with the sequence.Type: ApplicationFiled: January 24, 2003Publication date: December 4, 2003Inventors: Gregory H. Efland, Haixiang Liang, Yuanjie Chen
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Publication number: 20030210740Abstract: Provided is a system and method for a modem including one or more processing paths. Also included is a number of interconnected modules sequentially arrayed along the one or more paths. Each module is configured to (i) process signals passed along the paths in accordance with the sequence and (ii) implement predetermined functions to perform the processing. Further, each of the modules has a particular degree of functional programmability and the degrees of functional programmability monotonically vary in accordance with the sequence.Type: ApplicationFiled: January 24, 2003Publication date: November 13, 2003Inventors: Gregory H. Efland, Haixiang Liang, Kevin H. Peterson, Yuanjie Chen, Alan G. Corry, Nino P. Ferrario, Jeff Z. Guan, Meera Prahland, Ilya Stomakhin, Yongbing Wan, Larry C. Yamano, Lin Yin, Gong-San Yu, George A. Papanicolaou
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Patent number: 6438158Abstract: The present invention relates to multiple modulus conversion (MMC) techniques for mapping data in a pulse code modulation (PCM) modem system. In accordance with the present invention, signal point constellations are arranged to receive the output indices generated by the MMC procedure such that the probability of transmission of higher power codewords is relatively low compared to the probability of transmission of lower power codewords, while maintaining the same or larger minimum distance between signal points. In addition, the present invention provides techniques for obtaining the probability of occurrence for each constellation or signal point associated with a given data communication session and for determining the theoretical average transmit power associated with a given set of signal point constellations and MMC parameters.Type: GrantFiled: January 3, 2000Date of Patent: August 20, 2002Assignee: Conexant Systems, Inc.Inventors: Zhenyu Zhou, Xuming Zhang, Yuanjie Chen
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Patent number: 6034991Abstract: The present invention relates to multiple modulus conversion (MMC) techniques for mapping data in a pulse code modulation (PCM) modem system. In accordance with the present invention, signal point constellations are arranged to receive the output indices generated by the MMC procedure such that the probability of transmission of higher power codewords is relatively low compared to the probability of transmission of lower power codewords, while maintaining the same or larger minimum distance between signal points. In addition, the present invention provides techniques for obtaining the probability of occurrence for each constellation or signal point associated with a given data communication session and for determining the theoretical average transmit power associated with a given set of signal point constellations and MMC parameters.Type: GrantFiled: January 26, 1998Date of Patent: March 7, 2000Assignee: Conexant Systems, Inc.Inventors: Zhenyu Zhou, Xuming Zhang, Yuanjie Chen