Patents by Inventor Lixi Wu
Lixi Wu 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: 11923889Abstract: Various embodiments include methods and systems having detection apparatus operable to cancel or reduce leakage signal originating from a source signal being generated and transmitted from a transmitter. A leakage cancellation signal can be generated digitally, converted to an analog signal, and then subtracted in the analog domain from a received signal to provide a leakage-reduced signal for use in detection and analysis of objects. A digital cancellation signal may be generated by generating a cancellation signal in the frequency domain and converting it to the time domain. Optionally, an estimate of a residual leakage signal can be generated and applied to reduce residual leakage remaining in the leakage-reduced signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: GrantFiled: September 27, 2022Date of Patent: March 5, 2024Assignee: Futurewei Technologies, Inc.Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Publication number: 20230008841Abstract: Various embodiments include methods and systems having detection apparatus operable to cancel or reduce leakage signal originating from a source signal being generated and transmitted from a transmitter. A leakage cancellation signal can be generated digitally, converted to an analog signal, and then subtracted in the analog domain from a received signal to provide a leakage-reduced signal for use in detection and analysis of objects. A digital cancellation signal may be generated by generating a cancellation signal in the frequency domain and converting it to the time domain. Optionally, an estimate of a residual leakage signal can be generated and applied to reduce residual leakage remaining in the leakage-reduced signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: ApplicationFiled: September 27, 2022Publication date: January 12, 2023Applicant: Futurewei Technologies, Inc.Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Patent number: 11476891Abstract: Various embodiments include methods and systems having detection apparatus operable to cancel or reduce leakage signal originating from a source signal being generated and transmitted from a transmitter. A leakage cancellation signal can be generated digitally, converted to an analog signal, and then subtracted in the analog domain from a received signal to provide a leakage-reduced signal for use in detection and analysis of objects. A digital cancellation signal may be generated by generating a cancellation signal in the frequency domain and converting it to the time domain. Optionally, an estimate of a residual leakage signal can be generated and applied to reduce residual leakage remaining in the leakage-reduced signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: GrantFiled: March 16, 2020Date of Patent: October 18, 2022Assignee: Futurewei Technologies, Inc.Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Publication number: 20200287587Abstract: Various embodiments include methods and systems having a frequency-modulated continuous wave radar operable to compensate a return signal for nonlinearity in the associated radar signal that is transmitted. The radar signal can be mixed with a delayed version of the radar signal such that the mixed signal can be used to generate an estimate of the nonlinearity. The estimate can be used to compensate the return signal from an object that reflects the associated transmitted radar signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: ApplicationFiled: March 16, 2020Publication date: September 10, 2020Applicant: Futurewei Technologies, Inc.Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Patent number: 10594358Abstract: Various embodiments include methods and systems having detection apparatus operable to cancel or reduce leakage signal originating from a source signal being generated and transmitted from a transmitter. A leakage cancellation signal can be generated digitally, converted to an analog signal, and then subtracted in the analog domain from a received signal to provide a leakage-reduced signal for use in detection and analysis of objects. A digital cancellation signal may be generated by generating a cancellation signal in the frequency domain and converting it to the time domain. Optionally, an estimate of a residual leakage signal can be generated and applied to reduce residual leakage remaining in the leakage-reduced signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: GrantFiled: April 21, 2017Date of Patent: March 17, 2020Assignee: Futurewei Technologies, Inc.Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Patent number: 10422856Abstract: Various embodiments include methods and systems having a frequency-modulated continuous wave radar operable to compensate a return signal for nonlinearity in the associated radar signal that is transmitted. The radar signal can be mixed with a delayed version of the radar signal such that the mixed signal can be used to generate an estimate of the nonlinearity. The estimate can be used to compensate the return signal from an object that reflects the associated transmitted radar signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: GrantFiled: April 21, 2017Date of Patent: September 24, 2019Assignee: Futurewei Technologies, Inc.Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Publication number: 20180329031Abstract: Various embodiments include methods and systems having a frequency-modulated continuous wave radar operable to compensate a return signal for nonlinearity in the associated radar signal that is transmitted. The radar signal can be mixed with a delayed version of the radar signal such that the mixed signal can be used to generate an estimate of the nonlinearity. The estimate can be used to compensate the return signal from an object that reflects the associated transmitted radar signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: ApplicationFiled: April 21, 2017Publication date: November 15, 2018Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Publication number: 20180309474Abstract: Various embodiments include methods and systems having detection apparatus operable to cancel or reduce leakage signal originating from a source signal being generated and transmitted from a transmitter. A leakage cancellation signal can be generated digitally, converted to an analog signal, and then subtracted in the analog domain from a received signal to provide a leakage-reduced signal for use in detection and analysis of objects. A digital cancellation signal may be generated by generating a cancellation signal in the frequency domain and converting it to the time domain. Optionally, an estimate of a residual leakage signal can be generated and applied to reduce residual leakage remaining in the leakage-reduced signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.Type: ApplicationFiled: April 21, 2017Publication date: October 25, 2018Inventors: Ricky Lap Kei Cheung, Luzhou Xu, Lixi Wu, Hsing Kuo Lo, Yuan Su
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Patent number: 6535580Abstract: Signature apparatus and techniques that make home networking devices, e.g., in-Home Phoneline Network (herein referred to as “HPN”) devices, isolation filters, network interface devices, etc., detectable by commercially available metallic loop termination (MLT) test equipment. The invention also provides a method of testing a telephone line for the existence of a signature circuit identifying a home network. The home network signature circuit includes a series combination of a voltage breakdown device (e.g., Zener diodes) and an impedance (e.g., 200K ohm resistor). In operation, the home network signature circuit shunts the tested subscriber line loop with a voltage-dependent impedance in the presence of an appropriate test voltage exceeding 80 volts. Different high voltage thresholds of the voltage breakdown portion and/or different resistance values of the shunt impedance can be implemented in the home network signature device to produce uniquely detectable signatures.Type: GrantFiled: June 29, 2000Date of Patent: March 18, 2003Assignee: Agere Systems Inc.Inventors: Steven E. Strauss, John T. Holloway, Jason Alexander Trachewsky, Lixi Wu