Patents by Inventor Hou-Shin Chen
Hou-Shin 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: 11870512Abstract: A closed-loop power control (CLPC) system is disclosed that includes a first signal path for a first polarization and a second signal path for a second polarization. The first signal path includes a first power amplifier, a first output power detector configured to detect a first output power level of the first power amplifier, and a first processor configured to determine a first analog gain for a first controller and a first gain for a first digital-to-analog converter based on a first accumulated error between the first output power level and a target Effective Isotropically Radiated Power. A second processor is configured to set a first variable gain of a first variable gain amplifier coupled to an input of the first power amplifier. The CLPC can be configured to control the gain of the first signal path separately or as one signal path.Type: GrantFiled: April 27, 2022Date of Patent: January 9, 2024Inventors: Yanru Tang, Pranav Dayal, Hou-Shin Chen, Pritesh Vora, Tienyu Chang, Siuchuang Ivan Lu, Kee-Bong Song
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Patent number: 11812391Abstract: A method of controlling power in a transmission system may include determining a first transmit power of a first transmit path, determining a second transmit power of a second transmit path, and controlling the first transmit path and the second transmit path based on a combination of the first transmit power and the second transmit power. The combination of the first transmit power and the second transmit power may include a sum of the first transmit power and the second transmit power. Controlling the first transmit path and the second transmit path may include determining a first effective power target for the first transmit path based on the first transmit power and the second transmit power, and determining a second effective power target for the second transmit path based on the first transmit power and the second transmit power.Type: GrantFiled: November 7, 2022Date of Patent: November 7, 2023Inventors: Pranav Dayal, Kee-Bong Song, Hou-Shin Chen, Sung-En Chiu, Karthik Nagarajan
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Publication number: 20230353195Abstract: A closed-loop power control (CLPC) system is disclosed that includes a first signal path for a first polarization and a second signal path for a second polarization. The first signal path includes a first power amplifier, a first output power detector configured to detect a first output power level of the first power amplifier, and a first processor configured to determine a first analog gain for a first controller and a first gain for a first digital-to-analog converter based on a first accumulated error between the first output power level and a target Effective Isotropically Radiated Power. A second processor is configured to set a first variable gain of a first variable gain amplifier coupled to an input of the first power amplifier. The CLPC can be configured to control the gain of the first signal path separately or as one signal path.Type: ApplicationFiled: April 27, 2022Publication date: November 2, 2023Inventors: Yanru TANG, Pranav DAYAL, Hou-Shin CHEN, Pritesh VORA, Tienyu CHANG, Siuchuang Ivan LU, Kee-Bong SONG
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Publication number: 20230082170Abstract: A method of controlling power in a transmission system may include determining a first transmit power of a first transmit path, determining a second transmit power of a second transmit path, and controlling the first transmit path and the second transmit path based on a combination of the first transmit power and the second transmit power. The combination of the first transmit power and the second transmit power may include a sum of the first transmit power and the second transmit power. Controlling the first transmit path and the second transmit path may include determining a first effective power target for the first transmit path based on the first transmit power and the second transmit power, and determining a second effective power target for the second transmit path based on the first transmit power and the second transmit power.Type: ApplicationFiled: November 7, 2022Publication date: March 16, 2023Inventors: Pranav DAYAL, Kee-Bong SONG, Hou-Shin CHEN, Sung-En CHIU, Karthik NAGARAJAN
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Patent number: 11496969Abstract: A method of controlling power in a transmission system may include determining a first transmit power of a first transmit path, determining a second transmit power of a second transmit path, and controlling the first transmit path and the second transmit path based on a combination of the first transmit power and the second transmit power. The combination of the first transmit power and the second transmit power may include a sum of the first transmit power and the second transmit power. Controlling the first transmit path and the second transmit path may include determining a first effective power target for the first transmit path based on the first transmit power and the second transmit power, and determining a second effective power target for the second transmit path based on the first transmit power and the second transmit power.Type: GrantFiled: April 5, 2021Date of Patent: November 8, 2022Inventors: Pranav Dayal, Kee-Bong Song, Hou-Shin Chen, Sung-En Chiu, Karthik Nagarajan
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Publication number: 20220116884Abstract: A method of controlling power in a transmission system may include determining a first transmit power of a first transmit path, determining a second transmit power of a second transmit path, and controlling the first transmit path and the second transmit path based on a combination of the first transmit power and the second transmit power. The combination of the first transmit power and the second transmit power may include a sum of the first transmit power and the second transmit power. Controlling the first transmit path and the second transmit path may include determining a first effective power target for the first transmit path based on the first transmit power and the second transmit power, and determining a second effective power target for the second transmit path based on the first transmit power and the second transmit power.Type: ApplicationFiled: April 5, 2021Publication date: April 14, 2022Inventors: Pranav DAYAL, Kee-Bong SONG, Hou-Shin CHEN, Sung-En CHIU, Karthik NAGARAJAN
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Patent number: 11140633Abstract: A method of gain step calibration by a user equipment (UE) includes selecting, a l th antenna path having a gain GT for a transmitter (Tx) of the UE and a corresponding m th antenna path having a gain GR for a receiver (Rx) of the UE; determining, a first loopback signal power for the l th antenna path having the gain GT for the transmitter (Tx) of the UE and the corresponding m th antenna path having the gain GR for the receiver (Rx) of the UE; determining, a second loopback signal power for the l th antenna path having a gain G?T for the transmitter (Tx) and the corresponding m th antenna path having the gain GR for the receiver (Rx); and determining, a transmitter gain step of the UE based on the first loopback signal power and the second loopback signal power.Type: GrantFiled: July 30, 2020Date of Patent: October 5, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-En Chiu, Pranav Dayal, Kee-Bong Song, Siuchuang Ivan Lu, Hou-Shin Chen, Sang Won Son
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Publication number: 20210258883Abstract: A method of gain step calibration by a user equipment (UE) includes selecting, a l th antenna path having a gain GT for a transmitter (Tx) of the UE and a corresponding m th antenna path having a gain GR for a receiver (Rx) of the UE; determining, a first loopback signal power for the l th antenna path having the gain GT for the transmitter (Tx) of the UE and the corresponding m th antenna path having the gain GR for the receiver (Rx) of the UE; determining, a second loopback signal power for the l th antenna path having a gain G?T for the transmitter (Tx) and the corresponding m th antenna path having the gain GR for the receiver (Rx); and determining, a transmitter gain step of the UE based on the first loopback signal power and the second loopback signal power.Type: ApplicationFiled: July 30, 2020Publication date: August 19, 2021Inventors: Sung-En Chiu, Pranav Dayal, Kee-Bong Song, Siuchuang Ivan Lu, Hou-Shin Chen, Sang Won Son
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Publication number: 20170366238Abstract: The disclosure provides systems, devices, and methods for distributed relay multiple-in multiple-out (DR-MIMO) communications. The system can have a master transmit node that transmits a message to a master receive node via one or more relay nodes. The relay nodes can each relay a portion of the message, performing a time or frequency shift along with the relay. The multiple relay nodes can function as a distributed antenna array for one or both of the master transmit node and the master receive node, forming a transmit group and/or a receive group. The transmit group and the receive group can thus provide MIMO capabilities to the master transmit node and the master receive node. The master transmit node can transmit multiple spatial streams through distributed relay nodes. The master receive node can receive multiple data streams from distributed relay nodes and perform MIMO detection.Type: ApplicationFiled: June 16, 2017Publication date: December 21, 2017Inventors: Hou-Shin Chen, Fu-Hsuan Chiu
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Patent number: 9839033Abstract: A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.Type: GrantFiled: October 4, 2016Date of Patent: December 5, 2017Assignee: THOMSON LicensingInventors: Wen Gao, Hou-Shin Chen
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Patent number: 9793931Abstract: The invention relates to a wireless home gateway apparatus and methods of wirelessly delivering audio and/or video programs between a home gateway and a client and mitigating interference thereon. Specifically, the present invention relates to transmitting an audio/video program on two white space channels and alternately stopping transmission on one of said channels to search for external transmissions on the white space channel. The present invention permits the wireless home gateway to continuously transmit an audio/video program to a client while periodically searching for transmitters on each of the white space channels.Type: GrantFiled: January 15, 2010Date of Patent: October 17, 2017Assignee: THOMSON LicensingInventors: Paul Gothard Knutson, Wen Gao, Benyuan Zhang, Hou-Shin Chen
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Patent number: 9603027Abstract: Methods and apparatus for access, enablement and control of devices in TV white space are provided. Methods and apparatus for channel scanning by a device are provided that shorten channel scanning time by using a 5 MHz Measurement Pilot frame at a predetermined location within an enabling device's channel, regardless of the operating bandwidth of the enabling device. Also provided are methods and apparatus for multi-band dynamic station enablement that locate information regarding an enabling device's supported regulatory classes and channel numbers within one accessible frame of information and also provide request and response messages to arrange for enablement of a requesting device on a network. Further, methods and apparatus are provided for identifying an interfering device on a network by providing increased information from within a DSE Registered Location element.Type: GrantFiled: October 13, 2015Date of Patent: March 21, 2017Assignee: THOMSON LICENSINGInventors: Hou-Shin Chen, Wen Gao
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Publication number: 20170026966Abstract: A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.Type: ApplicationFiled: October 4, 2016Publication date: January 26, 2017Inventors: Wen GAO, Hou-Shin CHEN
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Patent number: 9491756Abstract: A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.Type: GrantFiled: October 22, 2015Date of Patent: November 8, 2016Assignee: THOMSON LICENSINGInventors: Wen Gao, Hou-Shin Chen
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Patent number: 9350489Abstract: An efficient and reliable encoding method suitable for header information in a digital cable television transmission system is provided. An embodiment is shown for FEC frame headers in a DVB-C2 standard, along with the detection algorithm for the FEC header. In the DVB-C2 Standard, Adaptive Coding and Modulation (ACM) or Variable Coding and Modulation (VCM) is applied to each FEC block to provide as much flexibility as possible. As a result, a frame header is attached in front of each FEC frame to inform the coding rate, modulation type and physical layer pipe identifier. Besides the signaling of physical layer related information, the FEC frame header has to provide a structure so that it can be easily and reliably detected in the receiver. Motivated by the need in DVB-C2 Standard, an efficient and reliable method and apparatus to encode the FEC header for DVB-C2 Standard is provided in at least one implementation in this disclosure. In addition, the detection algorithm of the FEC header is described.Type: GrantFiled: November 17, 2009Date of Patent: May 24, 2016Assignee: Thomson LicensingInventors: Wen Gao, Hou-Shin Chen
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Patent number: 9282557Abstract: A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.Type: GrantFiled: August 26, 2010Date of Patent: March 8, 2016Assignee: THOMSON LICENSINGInventors: Wen Gao, Hou-Shin Chen
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Publication number: 20160044648Abstract: A method and apparatus are described including defining a neighbor set for each access point, selecting a first clock in a first access point, the selected clock having a highest accuracy as a grand master clock, advising neighboring access points to synchronize with the selected grand master clock and transmitting a message to schedule a quiet period based on the grand master clock. Also described are a method and apparatus including receiving a beacon message, inspecting clock descriptors in the beacon message, selecting a best master clock responsive to the inspection and transmitting a message to schedule a quiet period based on the selected best master clock.Type: ApplicationFiled: October 22, 2015Publication date: February 11, 2016Applicant: THOMSON LICENSINGInventors: Wen GAO, Hou-Shin CHEN
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Publication number: 20160037353Abstract: Methods and apparatus for access, enablement and control of devices in TV white space are provided. Methods and apparatus for channel scanning by a device are provided that shorten channel scanning time by using a 5 MHz Measurement Pilot frame at a predetermined location within an enabling device's channel, regardless of the operating bandwidth of the enabling device. Also provided are methods and apparatus for multi-band dynamic station enablement that locate information regarding an enabling device's supported regulatory classes and channel numbers within one accessible frame of information and also provide request and response messages to arrange for enablement of a requesting device on a network. Further, methods and apparatus are provided for identifying an interfering device on a network by providing increased information from within a DSE Registered Location element.Type: ApplicationFiled: October 13, 2015Publication date: February 4, 2016Applicant: THOMSON LICENSINGInventors: Hou-Shin CHEN, Wen GAO
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Patent number: 9236901Abstract: Code detection to assist a symbol-level equalizer in a receiver is described. In an embodiment, code detection uses adaptive Infinite Impulse Response (IIR) filtering to determine spreading code usage information and active code channels in a received signal. The spreading code usage information indicates if a spreading code associated with a code channel is among spreading codes used in the received signal. In another embodiment, the spreading code usage information is determined based on a forgetting factor associated with the filtering of a symbol power associated with the code channel.Type: GrantFiled: October 24, 2013Date of Patent: January 12, 2016Assignee: Broadcom CorporationInventors: Hou-Shin Chen, Fu-Hsuan Chiu
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Patent number: 9237449Abstract: A method and system for detection of available a white space channel in an area of licensed transmitters includes a detector which utilizes the autocorrelation analysis of a channel in an frequency modulated (FM) band. Calculation of the autocorrelation excludes an initial set of correlation delay values such that large values of autocorrelation are removed. The remaining autocorrelation based on higher correlation delay values exposes the sinusoidal nature of an FM transmitter operating in the selected channel. White space becomes available to a user if no transmitter is detected using the autocorrelation detection method.Type: GrantFiled: December 21, 2009Date of Patent: January 12, 2016Assignee: THOMSON LICENSINGInventors: Wen Gao, Hou-Shin Chen