Patents by Inventor James June-Ming Wang
James June-Ming Wang 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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Publication number: 20240128938Abstract: A wideband power amplifier (PA) linearization technique is proposed. A current interpolation technique is proposed to linearize power amplifiers over a wide bandwidth. The wideband power amplifier linearization technique employs a novel transconductance Gm linearizer using a current interpolation technique that achieves improvement in the third order intermodulation over wide bandwidth for a sub-micron CMOS differential power amplifier. By using a small amount of compensating bias into an opposite phase differential pair, linearization over wide bandwidth is achieved and can be optimized by adjusting the compensating bias.Type: ApplicationFiled: September 18, 2023Publication date: April 18, 2024Inventors: Kun-Long Wu, James June-Ming Wang
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Patent number: 11917551Abstract: Embodiments of the present invention are drawn to methods and electronic devices capable of performing coordinate spatial reuse for wirelessly transmitting data on a channel in coordination with another wireless AP operating an overlapping BSS using the same wireless channel. The device can perform RSSI measurements and generate Per-RU RSSI reports including the RSSI measurements information for transmission to another wireless AP. The RSSI measurement can be performed by the device based on power levels detected when receiving TB PPDUs transmitted by wireless STAs responsive to trigger frames, for example. Based on the Per-RU RSSI report, a wireless AP can be configured to transmit data to an associated wireless STA without causing significant interference when another AP of the overlapping BSS is also transmitting, and can schedule frames for transmission from associated wireless STAs accordingly.Type: GrantFiled: March 30, 2021Date of Patent: February 27, 2024Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Yongho Seok, Gary A. Anwyl, Jianhan Liu, Kai Ying Lu, James Chih-Shi Yee, Thomas Edward Pare, Jr., James June-Ming Wang
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Patent number: 11791777Abstract: A wideband power amplifier (PA) linearization technique is proposed. A current interpolation technique is proposed to linearize power amplifiers over a wide bandwidth. The wideband power amplifier linearization technique employs a novel transconductance Gm linearizer using a current interpolation technique that achieves improvement in the third order intermodulation over wide bandwidth for a sub-micron CMOS differential power amplifier. By using a small amount of compensating bias into an opposite phase differential pair, linearization over wide bandwidth is achieved and can be optimized by adjusting the compensating bias.Type: GrantFiled: August 19, 2021Date of Patent: October 17, 2023Inventors: Kun-Long Wu, James June-Ming Wang
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Publication number: 20230269592Abstract: An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.Type: ApplicationFiled: April 22, 2023Publication date: August 24, 2023Inventors: James June-Ming Wang, Chung-Ta Ku, Gabor Bajko, Gary A. Anwyl, Shuling Feng, Jianhan Liu, Yongho Seok, Po-Yuen Cheng, James Chih-Shi Yee, Thomas Edward Pare, JR.
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Patent number: 11678326Abstract: A first access point (AP) receives a second spatial reuse parameter (SRP) related to a second AP from the second AP. The first AP transmits the second SRP to at least a first communication device associated with the first apparatus. The first AP then receives a uplink (UL) transmission from the first communication device with a transmit power of the UL transmission controlled based on the second SRP.Type: GrantFiled: July 9, 2020Date of Patent: June 13, 2023Assignee: MediaTek Singapore Pte. Ltd.Inventors: James June-Ming Wang, Yongho Seok, James Chih-Shi Yee, Jianhan Liu, Thomas Edward Pare, Jr.
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Patent number: 11671837Abstract: An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.Type: GrantFiled: October 8, 2020Date of Patent: June 6, 2023Assignee: MediaTek Singapore Pte. Ltd.Inventors: James June-Ming Wang, Chung-Ta Ku, Gabor Bajko, Gary A. Anwyl, Shuling Feng, Jianhan Liu, Yongho Seok, Po-Yuen Cheng, James Chih-Shi Yee, Thomas Edward Pare, Jr.
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Patent number: 11659581Abstract: Embodiments of the present invention provide a method and device for multi-AP beamforming (e.g., nulling) and spatial reuse to mitigate interference and improve the performance of MAP wireless networks. According to one embodiment, multiple APs agree to collaborate in multi-AP beamforming, transmissions of received PDDUs are measured to determine interference information, the APS generate interference maps, and the APs perform joint and Multi-AP beamforming in a first and second BSS to avoid/mitigate interference of the MAP wireless network. An RTS and CTS frame exchange sequence can be performed prior to Multi-AP beamforming between BSSs using a flag/indicator in the RTS frame to indicate coordinated transmission, or an UL trigger frame can be used to indicate a coordinated UL transmission.Type: GrantFiled: April 7, 2020Date of Patent: May 23, 2023Assignee: Mediatek Singapore PTE. LTD.Inventors: James June-Ming Wang, Yongho Seok, James Chih-Shi Yee, Jianhan Liu, Thomas Edward Pare, Jr.
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Publication number: 20230095020Abstract: Radio Frequency (RF) circuit (amplifiers, mixer, etc.) design with RFIC, e.g., implemented in CMOS, CaAs, SiGe, or other silicon processes, suffers performance variations (gain phase, frequency, bandwidth, nonlinearity) due to wafer process variations, temperature changes, and supply voltage changes, and random variations. In this invention, methods are proposed to precisely calibrate the bias current of all active devices in the system, and to precisely calibrate the gain of individual path leading to each amplifiers such that the same Pout is achieved for all antenna elements in the system.Type: ApplicationFiled: April 1, 2022Publication date: March 30, 2023Inventors: James June-Ming Wang, Yuh-Min Lin, Powei Chen
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Publication number: 20230048964Abstract: Embodiments of the present invention provide a method and apparatus for coordinated multi-AP channel access in a wireless network. A wireless AP that obtains a transmission opportunity (TXOP) (a “coordinator AP”) can grant one or more STAs or APs under control of the coordinator AP the use of some of the bandwidth granted by the TXOP. The STAs or APs that are granted the use of the bandwidth are referred to as “coordinated APs.” Thereafter, a coordinator AP or a coordinated AP can create a new basic service set (BSS) of devices for coordinating data transmissions. For example, the coordinated AP may serve as a relay, where the coordinated AP services devices in a new BSS by sending and receiving data with a coordinator AP in a different BSS.Type: ApplicationFiled: November 1, 2022Publication date: February 16, 2023Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi Yee, James June-Ming Wang, Thomas Edward Pare, JR., Shihchieh Lee
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Patent number: 11533756Abstract: A data unit (e.g., a physical layer convergence procedure (PLCP) protocol data unit (PPDU)) is detected at a first wireless device of a basic service set (BSS). The data unit was sent on a channel from a second wireless device of an overlapping basic service set (OBSS). The data unit is wide-bandwidth, occupying both a primary channel and a secondary channel of the wireless network. The first and second wireless devices are within a same spatial reuse group (SRG). The first wireless device stores the channel bandwidth of the data unit and a receive duration time of the data unit. During the receive duration time of the data unit, a SRG OBSS power density threshold is applied on the secondary channels that are within the channel bandwidth of the data unit, instead of applying a non-SRG OBSS power density threshold on those secondary channels.Type: GrantFiled: September 11, 2020Date of Patent: December 20, 2022Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Yongho Seok, James June-Ming Wang, Chao-Chun Wang, Chih-Shi Yee
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Patent number: 11523423Abstract: Embodiments of the present invention provide a method and apparatus for coordinated multi-AP channel access in a wireless network. A wireless AP that obtains a transmission opportunity (TXOP) (a “coordinator AP”) can grant one or more STAs or APs under control of the coordinator AP the use of some of the bandwidth granted by the TXOP. The STAs or APs that are granted the use of the bandwidth are referred to as “coordinated APs.” Thereafter, a coordinator AP or a coordinated AP can create a new basic service set (BSS) of devices for coordinating data transmissions. For example, the coordinated AP may serve as a relay, where the coordinated AP services devices in a new BSS by sending and receiving data with a coordinator AP in a different BSS.Type: GrantFiled: January 21, 2020Date of Patent: December 6, 2022Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi Yee, James June-Ming Wang, Thomas Edward Pare, Jr., Shihchieh Lee
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Patent number: 11503638Abstract: A data unit (e.g., a physical layer convergence procedure (PLCP) protocol data unit (PPDU)) is detected at a first wireless device of a basic service set (BSS). The data unit was sent on a channel from a second wireless device of an overlapping basic service set (OBSS). The data unit is wide-bandwidth, occupying both a primary channel and a secondary channel of the wireless network. The first and second wireless devices are within a same spatial reuse group (SRG). The first wireless device stores the channel bandwidth of the data unit and a receive duration time of the data unit. During the receive duration time of the data unit, a SRG OBSS power density threshold is applied on the secondary channels that are within the channel bandwidth of the data unit, instead of applying a non-SRG OBSS power density threshold on those secondary channels.Type: GrantFiled: September 11, 2020Date of Patent: November 15, 2022Assignee: MEDIATEK SINGAPORE PTE LTD.Inventors: Yongho Seok, James June-Ming Wang, Chao-Chun Wang, Chih-Shi Yee
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Patent number: 11503570Abstract: A wireless communication device may receive with one of N antennas a signal processing message indicating a number up to N signals to process. Each of the N antennas may used to receive a communication. The indicated number of up to N signals may be processed and data from the indicated number of up to N signals recovered.Type: GrantFiled: September 10, 2021Date of Patent: November 15, 2022Assignee: III Holdings 1, LLCInventors: Robert Warner, Jack Winters, James June-Ming Wang
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Patent number: 11411635Abstract: Systems and methods of WLAN communication including efficient spatial reuse mechanisms for relay transmissions between a repeater network and non-AP STAs in OFDMA. The non-AP STAs are grouped based on their connectivity with the individual repeaters and the radio coverage regions of the repeaters. Each group is either a non-overlapping group with the constituent non-AP STAs located in a non-overlapping coverage region of a particular repeater, or an overlapping group with the constituent non-AP STAs located in an overlapping coverage region of two or more repeaters. Based on the grouping, certain RUs (or subchannels) are reused for multiple groups without causing inter-group interference, thereby expanding the bandwidths used in the relay operations. RU allocation based on grouping can be used in combination with transmit power adjustment to achieve efficient spatial reuse in OFDMA.Type: GrantFiled: March 12, 2019Date of Patent: August 9, 2022Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: James June-Ming Wang, Thomas Edward Pare, Jr., Yongho Seok, Gabor Bajko, Jianhan Liu, Tianyu Wu
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Publication number: 20220060153Abstract: A power amplifier (PA) linearization technique with a wider linearized power range is proposed. Proposed two types of linearizers with cross-coupled PMOS and NMOS configuration. The idea is to use a complimentary device compared with the PA core device, and the behavior of Cgs of the linearizer are also complimentary to the PA itself. In the other words, the overall Cgs of the PA with the linearizer would be constant without leading to non-linear waveform. Both linearizers can effectively compensate not only AMAM but also AMPM. First type of linearizer can be integrated with PA cores, and second type of linearizer can be used in the IMN. Both linearizers have effective IM3 reduction in different corner.Type: ApplicationFiled: August 19, 2021Publication date: February 24, 2022Inventors: Jin-Fu Yeh, James June-Ming Wang, Yuh-Min Lin
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Publication number: 20220060152Abstract: A wideband power amplifier (PA) linearization technique is proposed. A current interpolation technique is proposed to linearize power amplifiers over a wide bandwidth. The wideband power amplifier linearization technique employs a novel transconductance Gm linearizer using a current interpolation technique that achieves improvement in the third order intermodulation over wide bandwidth for a sub-micron CMOS differential power amplifier. By using a small amount of compensating bias into an opposite phase differential pair, linearization over wide bandwidth is achieved and can be optimized by adjusting the compensating bias.Type: ApplicationFiled: August 19, 2021Publication date: February 24, 2022Inventors: Kun-Long Wu, James June-Ming Wang
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Publication number: 20210410115Abstract: A wireless communication device may receive with one of N antennas a signal processing message indicating a number up to N signals to process. Each of the N antennas may used to receive a communication. The indicated number of up to N signals may be processed and data from the indicated number of up to N signals recovered.Type: ApplicationFiled: September 10, 2021Publication date: December 30, 2021Applicant: III HOLDINGS 1, LLCInventors: Robert Warner, Jack Winters, James June-Ming Wang
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Patent number: 11190986Abstract: Mechanisms of CCA status reporting and NAV distribution for coordinated transmissions in a multi-AP WLAN. A coordinator AP may broadcast a RTS frame to a set of coordinated APs, which allow the coordinated APs with a CCA clear status to set a protected period in a CST frame to silence the associated non-AP STAs. The coordinator AP also polls the coordinated APs to have them individually report their CCA statuses as well as additional information used for transmission coordination. In some embodiments, a status report from a coordinated AP may integrate the protected period setting and the CCA clean status indication, and therefore the coordinator AP just needs to poll for such a report without using RTS/CTS exchange. A coordinated AP may set a protected period to end at the complete transmission of a coordination frame. The coordination frame may specify the remaining TXOP duration information.Type: GrantFiled: October 1, 2019Date of Patent: November 30, 2021Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Jianhan Liu, Yongho Seok, James June-Ming Wang, James Chih-Shi Yee, Thomas Edward Pare, Jr.
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Patent number: 11152977Abstract: A method of sounding and feedback with channel quality information and reduced overhead is provided. A receiving station receives a sounding signal transmitted from an access point over multiple sub-channels of a wide channel in a wireless network. The receiving station detects channel quality based on the received sounding signal for each sub-channel. The receiving station then performs channel estimation based on the received sounding signal and thereby determining feedback information. Finally, the receiving station transmits a feedback message to the access point, the feedback message contains NULL feedback information, reduced feedback information, or channel integrity/quality indicators based on the channel quality information for each sub-channel. Based on the feedback message, the access point may repeat the sounding process, narrow the transmission bandwidth, or select only stations who have indicated uncorrupted channel sounding for MU-MMO transmission.Type: GrantFiled: February 24, 2020Date of Patent: October 19, 2021Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: James June-Ming Wang, Jianhan Liu, Vishakan Ponnampalam, Chao-Chun Wang, Huanchun Ye
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Patent number: 11147045Abstract: A wireless communication device may receive with one of N antennas a signal processing message indicating a number up to N signals to process. Each of the N antennas may used to receive a communication. The indicated number of up to N signals may be processed and data from the indicated number of up to N signals recovered.Type: GrantFiled: September 30, 2019Date of Patent: October 12, 2021Assignee: III HOLDINGS 1, LLCInventors: Robert Warner, Jack Winters, James June-Ming Wang