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公开(公告)号：US20230412302A1
公开(公告)日：2023-12-21
申请号：US18459868
申请日：2023-09-01
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Dung Ngoc DOAN , Sameer VERMANI , Stephen Jay SHELLHAMMER , Jialing Li CHEN
CPC classification number: H04L1/0013 , H04W24/08 , H04L1/0003 , H04W84/12
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for link adaptation in a wireless local area network (WLAN). A link adaptation test packet from a first WLAN device to a second WLAN may include a plurality of link adaptation test portions that are generated using a corresponding plurality of transmission rate options. For example, the plurality of link adaptation test portions may be modulated using different modulation and coding scheme (MCS) options. Thus, a single test packet may be used to evaluate different transmission rate options. The second WLAN device may provide feedback information regarding the link adaptation test portions. The feedback information may be used to determine a transmission rate for a subsequent transmission from the first WLAN device to the second WLAN device based on wireless channel conditions.
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公开(公告)号：US20230379725A1
公开(公告)日：2023-11-23
申请号：US17746623
申请日：2022-05-17
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Alecsander Petru EITAN , Youhan KIM
IPC: H04W16/28 , H04B7/0417 , H04B7/06
CPC classification number: H04W16/28 , H04B7/0417 , H04B7/0617 , H04B7/0695
Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks. Some implementations more specifically relate to beamforming training operations that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a beamforming initiator may initiate a beamforming training operation by transmitting a number (N) of beamforming training (BFT) packets in N TX beam directions, respectively, on a carrier frequency above 7 GHz. The beamforming responder receives one or more of the BFT packets and provides feedback to the beamforming initiator indicating the TX beam direction associated with the BFT packet having the highest received signal power. In some aspects, the beamforming responder may train its RX antennas for RX beamforming concurrently while the beamforming initiator trains its TX antennas. In some other aspects, the beamforming responder may train its RX antennas after the beamforming initiator trains its TX antennas.
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公开(公告)号：US20230291610A1
公开(公告)日：2023-09-14
申请号：US17804243
申请日：2022-05-26
Applicant: QUALCOMM Incorporated
Inventor： Pooria PAKROOH , Bin TIAN , Stephen Jay SHELLHAMMER , Koorosh AKHAVAN , Le Nguyen LUONG , Ishaque Ashar KADAMPOT
CPC classification number: H04L25/0212 , H04W52/52
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a responding device may receive a signal from an initiating device. The responding device may estimate, from the signal, a channel impulse response (CIR) that represents signal reflections from one or more objects as multiple taps. The responding device may select one or more taps, from the multiple taps, that are within a first time window that starts at a first offset from a reference point and that has a first specified time duration. The responding device may transmit, to the initiating device, a CIR report that indicates the one or more taps. Numerous other aspects are described.
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公开(公告)号：US20230198821A1
公开(公告)日：2023-06-22
申请号：US18173614
申请日：2023-02-23
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Bin TIAN , Youhan KIM , Cheng-Ming CHEN
CPC classification number: H04L27/2613 , H04L27/2657 , H04L5/0048 , H04L1/0068
Abstract: A technique for wireless communication of a punctured null data packet with a long training field sequence is disclosed. The long training field (LTF) sequence is generated for the null data packet (NDP) for transmission over a channel having a bandwidth that is an integer multiple of 80 MHz. The LTF sequence is modulated onto a plurality of tones of the channel excluding tones within a punctured subchannel of a plurality of subchannels of the channel. The modulation may be based on a size and location of the punctured subchannel and a symbol duration associated with transmitting the LTF sequence. The NDP is transmitted including the LTF sequence to a second wireless communication device via the channel. A partial bandwidth feedback may be received in response to the LTF in the punctured NDP.
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公开(公告)号：US20230048884A1
公开(公告)日：2023-02-16
申请号：US17390828
申请日：2021-07-30
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM , Qifan CHEN
IPC: H04L5/00
Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to pilot tone designs that support distributed transmission. A transmitting device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical RU associated with the legacy tone plan and may further map the M tones to M noncontiguous subcarrier indices associated with a wireless channel. The transmitting device may transmit the PPDU, over the wireless channel, with a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices. In some implementations, the relative locations of the N pilot tones may be different than relative locations of a number (K) of pilot tones associated with the logical RU.
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Patent Agency Ranking
公开(公告)号：US20220393790A1
公开(公告)日：2022-12-08
申请号：US17340578
申请日：2021-06-07
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Kanke WU , Bin TIAN , Youhan KIM
Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to tone mapping techniques and physical layer convergence protocol (PLCP) protocol data unit (PPDU) designs that support duplicate (or “DUP mode”) transmissions with channel puncturing. In some implementations, a wireless communication device may transmit a PPDU carrying user data over a wireless channel excluding one or more punctured subchannels, where the user data is transmitted in a DUP mode. As such, the user data may be mapped to a number (N) of tones spanning a first portion of the wireless channel and a duplicate copy of the user data may be mapped to N tones spanning a second portion of the wireless channel.
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公开(公告)号：US20220140942A1
公开(公告)日：2022-05-05
申请号：US17513849
申请日：2021-10-28
Applicant: QUALCOMM Incorporated
Inventor： Sameer VERMANI , Bin TIAN , Youhan KIM , Jialing Li CHEN
IPC: H04L1/00
Abstract: This disclosure provides methods, devices and systems for interpreting reserved bits and values associated with different releases of a wireless communication protocol. In some implementations, a wireless communication device may determine whether to terminate or continue reception of a physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) if it detects a reserved bit in the physical layer preamble set to an unsupported value (such as a value different than what is defined by a version or release of the wireless communication protocol supported by the wireless communication device). In some other implementations, a wireless communication device may determine whether to terminate or continue reception of a PPDU if it detects a field in the physical layer preamble set to a reserved value (such as defined by a version or release of the wireless communication protocol supported by the wireless communication device).
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公开(公告)号：US20220030572A1
公开(公告)日：2022-01-27
申请号：US17382585
申请日：2021-07-22
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay SHELLHAMMER , Sameer VERMANI , Jialing Li CHEN , Bin TIAN , Alfred ASTERJADHI , Yanjun SUN
Abstract: This disclosure provides methods, devices and systems for generating enhanced trigger frames. Some implementations more specifically relate to trigger frame designs that support gains in data throughput achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced trigger frame may be used to solicit a non-legacy trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) from one or more wireless stations (STAs). In some implementations, the enhanced trigger frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, an enhanced trigger frame may be configured in accordance with a legacy trigger frame format or a non-legacy trigger frame format. Thus, when configured in accordance with the legacy trigger frame format, the enhanced trigger frame can also be used to a legacy TB PPDU from one or more STAs.
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公开(公告)号：US20210344541A1
公开(公告)日：2021-11-04
申请号：US17244500
申请日：2021-04-29
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay SHELLHAMMER , Bin TIAN , Alireza RAISSINIA , Youhan KIM
Abstract: This disclosure provides methods, devices and systems for generating a secure long training field (LTF). In some implementations, the secure LTF may include a randomized bit sequence that is difficult, if not impossible, to replicate by any device other than the transmitting device and the intended receiving device. For example, the transmitting device may use a block cipher or stream cipher to generate a pseudorandom bit sequence and may select a subset of bits of the pseudorandom bit sequence to be mapped to a sequence of modulation symbols representing an LTF symbol of the secure LTF. More specifically, each of the modulation symbols is mapped to a respective one of a number of subcarriers spanning a bandwidth of the secure LTF. The transmitting device may further transmit a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF to the receiving device.
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公开(公告)号：US20210160843A1
公开(公告)日：2021-05-27
申请号：US17099343
申请日：2020-11-16
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Dung Ngoc DOAN
Abstract: This disclosure provides methods, devices and systems for amplitude shaping encoding, and specifically, for indicating boundaries in bitstreams encoded using amplitude shaping encoding. In some aspects, a transmitting device may insert, into an bitstream to indicate a boundary, a sequence of amplitude bits not associated with any patterns of bit values in a lookup table used for the encoding. In some other aspects, a transmitting device may monitor a length of the amplitude bits in a bitstream during the encoding and stop the encoding on information bits at an end of a current data unit responsive to the length reaching a threshold. In some other aspects, a transmitting device may monitor the length of the information bits and, for each data unit, determine whether a boundary is or would be reached. Responsive to determining that a boundary is or would be reached, the transmitting device may not include, before the boundary, any amplitude bits generated based on the information bits in the data unit, and instead add padding bits after a last amplitude bit before the boundary.
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