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公开(公告)号：US20140313922A1
公开(公告)日：2014-10-23
申请号：US14322800
申请日：2014-07-02
Applicant: QUALCOMM Incorporated
Inventor： Qifan Chen , Kai Shi , Ning Zhang
IPC: H04W24/08
CPC classification number: H04W24/08 , G01S7/40 , G01S13/765 , H04J3/0667
Abstract: A method and apparatus for improving the accuracy of a round trip time (RTT) estimate between a first device and a second device are disclosed. The method involves calculating an acknowledgement correction factor and a unicast correction factor. These correction factors are used to compensate for symbol boundary time errors resulting from multipath effects.
Abstract translation: 公开了一种用于提高第一设备和第二设备之间的往返时间（RTT）估计精度的方法和设备。 该方法涉及计算确认校正因子和单播校正因子。 这些校正因子用于补偿由多径效应引起的符号边界时间误差。
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公开(公告)号：US20240365320A1
公开(公告)日：2024-10-31
申请号：US18394707
申请日：2023-12-22
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Youhan Kim , Qifan Chen
IPC: H04W72/1273 , H04L1/00 , H04L5/00 , H04W72/0453
CPC classification number: H04W72/1273 , H04L1/0068 , H04L5/0041 , H04W72/0453
Abstract: This disclosure provides methods, components, devices and systems for extending distributed resource units (dRUs) beyond 80 MHz. Some aspects more specifically relate to supporting enhanced tone distribution mapping schemes and signaling. In some examples, a wireless station may receive, from an access point, scheduling information for a physical layer (PHY) protocol data unit (PDU) (PPDU) to be transmitted by one or more wireless stations including the wireless station over a wireless channel. The scheduling information may indicate one or more dRUs within the wireless channel, each dRU comprising a respective set of tones distributed across a distribution bandwidth of the wireless channel. The distribution bandwidth may be larger than 80 MHZ, and the one or more dRUs including a first dRU allocated to the wireless station. The wireless station may modulate a plurality of symbols for the PPDU onto the set of tones of the first dRU. The wireless station may transmit the plurality of symbols via the first dRU.
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公开(公告)号：US11711184B2
公开(公告)日：2023-07-25
申请号：US17493815
申请日：2021-10-04
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Qifan Chen , Youhan Kim
CPC classification number: H04L5/0041 , H04L5/0048 , H04L5/0069 , H04W52/286
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 LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.
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公开(公告)号：US09429642B1
公开(公告)日：2016-08-30
申请号：US14832046
申请日：2015-08-21
Applicant: QUALCOMM Incorporated
Inventor： Meriam Khufu Ragheb Rezk , Qifan Chen , Kapil Rai
Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may search for the radar signal within the first frequency segment or the second frequency segment based, at least in part, on Fast Fourier Transform bins associated with the received signals.
Abstract translation: 公开了一种用于在由无线设备接收的信号内搜索雷达信号的方法和装置。 无线设备可以在与第一频率段相邻的第一频率段和第二频率段内接收信号。 至少部分地，无线设备可以基于与所接收的信号相关联的快速傅里叶变换箱来搜索第一频段或第二频段内的雷达信号。
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公开(公告)号：US12184568B2
公开(公告)日：2024-12-31
申请号：US18513461
申请日：2023-11-17
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：US12058064B2
公开(公告)日：2024-08-06
申请号：US18323333
申请日：2023-05-24
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Qifan Chen , Youhan Kim
CPC classification number: H04L5/0041 , H04L5/0048 , H04L5/0069 , H04W52/286
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 LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.
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公开(公告)号：US11838227B2
公开(公告)日：2023-12-05
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
CPC classification number: H04L5/0044 , H04L5/0048
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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公开(公告)号：US12218884B2
公开(公告)日：2025-02-04
申请号：US17503215
申请日：2021-10-15
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Youhan Kim , Qifan Chen
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 short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.
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公开(公告)号：US12052192B2
公开(公告)日：2024-07-30
申请号：US17402475
申请日：2021-08-13
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Youhan Kim , Qifan Chen
CPC classification number: H04L5/0048 , H04W52/18
Abstract: This disclosure provides methods, devices and systems for distributed transmission of short training fields in a power spectral density limited frequency band. In one aspect, a device receives a distributed resource unit (dRU) assignment for transmission of a dRU portion of a physical layer protocol data unit (PPDU); determines a spatial stream global cyclic shift delay (CSD) index for an short training field (STF) of the dRU portion of the PPDU; and transmits, based on the spatial stream global CSD index, the EHT of the dRU portion of the PPDU across a dRU spreading bandwidth associated with the dRU assignment using a tone plan and sequence corresponding to a regular resource unit (rRU) transmission mode.
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公开(公告)号：US20230124579A1
公开(公告)日：2023-04-20
申请号：US17503215
申请日：2021-10-15
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin Tian , Youhan Kim , Qifan Chen
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 short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.
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