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公开(公告)号：US20170280439A1
公开(公告)日：2017-09-28
申请号：US15466167
申请日：2017-03-22
Applicant: QUALCOMM Incorporated
Inventor： Ning ZHANG , Xiaoxin Zhang , Kai Shi
CPC classification number: H04W72/0413 , H04L5/0007 , H04L5/0055 , H04L25/0216 , H04L27/2607 , H04W24/02
Abstract: This disclosure provides systems, methods and apparatuses for selecting a guard interval for transmission of orthogonal frequency-division multiplexing (OFDM) symbols on an uplink (UL) channel and on a downlink (DL) channel. In some implementations, a transmitting device and a receiving device can estimate channel delay spread (CDS) information for each other's transmit channels, exchange the estimated CDS information with each other, and select a guard interval based on the estimated CDS information exchanged with each other. The transmitting device can transmit a number of OFDM symbols separated by the selected guard interval to the receiving device on the UL channel, and the receiving device can transmit a number of OFDM symbols separated by the selected guard interval to the transmitting device on the DL channel.
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公开(公告)号：US09503839B2
公开(公告)日：2016-11-22
申请号：US14286565
申请日：2014-05-23
Applicant: QUALCOMM Incorporated
Inventor： Jubin Jose , Ying Wang , Kai Shi , Xinzhou Wu , Junyi Li
Abstract: Methods, systems, and devices are described for detecting dedicated short range communications (DSRC) transmissions to determine whether to use at least a portion of the DSRC spectrum. In one embodiment, a multi-mode device may be operated outside of the DSRC spectrum using a first clock rate, and may then be switched to a second clock rate while operating outside of the DSRC spectrum to detect DSRC transmissions using the DSRC spectrum.
Abstract translation: 描述了用于检测专用短距离通信（DSRC）传输以确定是否使用DSRC频谱的至少一部分的方法，系统和设备。 在一个实施例中，多模式设备可以使用第一时钟速率在DSRC频谱之外操作，然后可以在DSRC频谱之外操作时切换到第二时钟速率，以使用DSRC频谱来检测DSRC传输。
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23.发明申请ADAPTIVE CONTROL OF RF LOW POWER MODES IN A MULTI-RATE WIRELESS SYSTEM USING DEVICE MODE 有权使用设备模式的多速无线系统中RF低功耗模式的自适应控制公开(公告)号：US20150351032A1
公开(公告)日：2015-12-03
申请号：US14287670
申请日：2014-05-27
Applicant: QUALCOMM Incorporated
Inventor： Sandip Homchaudhuri , Paul Husted , MeeLan Lee , Srenik Mehta , Kai Shi , Shahram Abdollahi-Alibeik , Zhanfeng Jia , Soraya Kasnavi , Ning Zhang , David Kuochieh Su , Subramania Sharma Thandaveswaran , Kenneth Gainey , Ian David O'Donnell
CPC classification number: H04W52/0235 , G06F1/3206 , G06F1/3234 , H04W52/0229 , Y02D70/1262 , Y02D70/142 , Y02D70/22
Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system. In embodiments, power conservation may be achieved by adaptively controlling power modes of a wireless communication device, and implementing lower power modes with various modes of the device. According to one aspect, the mode of the device may be a beacon monitoring mode or a delivery traffic indication message (DTIM) mode. In such a mode, the device may receive a portion of a beacon in a first power mode. The device may transition to a second, different (e.g., higher) power mode using information contained in the received portion of the beacon as guidance.
Abstract translation: 描述了无线通信系统中的功率节省的方法，系统和设备。 在实施例中，可以通过自适应地控制无线通信设备的功率模式并且利用设备的各种模式来实现低功率模式来实现功率节省。 根据一个方面，设备的模式可以是信标监控模式或传送业务指示消息（DTIM）模式。 在这种模式中，设备可以以第一功率模式接收信标的一部分。 使用包含在信标的接收部分中的信息作为引导，设备可以转换到第二不同（例如更高）的功率模式。
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24.发明申请ADAPTIVE CONTROL OF RF LOW POWER MODES IN A MULTI-RATE WIRELESS SYSTEM USING MCS VALUE 有权使用MCS值的多速无线系统中RF低功耗模式的自适应控制公开(公告)号：US20150346807A1
公开(公告)日：2015-12-03
申请号：US14287663
申请日：2014-05-27
Applicant: QUALCOMM Incorporated
Inventor： Sandip Homchaudhuri , Paul Husted , MeeLan Lee , Srenik Mehta , Kai Shi , Shahram Abdollahi-Alibeik , Zhanfeng Jia , Soraya Kasnavi , Ning Zhang , David Kuochieh Su , Subramania Sharma Thandaveswaran , Kenneth Gainey , Ian David O'Donnell
IPC: G06F1/32
CPC classification number: G06F1/3293 , G06F1/3278 , G06F1/3287 , H04W52/0229 , Y02D70/00 , Y02D70/1262 , Y02D70/142 , Y02D70/22 , Y02D70/24
Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system. In embodiments, power conservation may be achieved by adaptively controlling power modes of a wireless communication device, using a modulation and coding scheme (MCS) value as a factor for guidance. According to one aspect, the device may be in a reception mode. While in a first power mode, the device may receive control information for incoming data that is being transmitted via a transmission frame. The control information may be located in a first portion of the frame with the data following in a second portion of the frame. The control information may include or otherwise indicate an MCS value corresponding to the MCS applied to the incoming data. Based on the MCS value, the device may be adaptively switched to a second power mode for receiving the incoming data.
Abstract translation: 描述了无线通信系统中的功率节省的方法，系统和设备。 在实施例中，可以通过使用调制和编码方案（MCS）值作为引导因素来自适应地控制无线通信设备的功率模式来实现功率节省。 根据一个方面，设备可以处于接收模式。 在第一功率模式下，设备可以接收正在通过传输帧发送的输入数据的控制信息。 控制信息可以位于帧的第一部分中，数据跟随在帧的第二部分中。 控制信息可以包括或以其他方式指示对应于应用于输入数据的MCS的MCS值。 基于MCS值，设备可以自适应地切换到用于接收传入数据的第二功率模式。
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25.发明申请公开(公告)号：US20150200749A1
公开(公告)日：2015-07-16
申请号：US14156834
申请日：2014-01-16
Applicant: QUALCOMM Incorporated
Inventor： Kai Shi , Ning Zhang
CPC classification number: H04L1/0063 , H04L1/0042 , H04L1/0057 , H04L1/0065 , H04L1/0068 , H04L1/0618 , H04L27/2627 , H04L69/22
Abstract: A system and method for transmitting LDPC parameters is provided. In the method, an initial number of OFDM symbols (Nsym_init) is determined for a packet that is based on the number of information bits to be delivered in the packet. An STBC value is also determined. A number of extra symbols (Nsym_ext) value is generated based on the Nsym_init value, wherein a Nsym value is based on said Nsym_init value and said Nsym_ext value. An Nldpc_ext value is determined based on the STBC value and the Nsym_ext value for purposes of determining LDPC parameters associated with the packet.
Abstract translation: 提供了一种传输LDPC参数的系统和方法。 在该方法中，基于要在分组中传送的信息比特的数量的分组来确定初始数目的OFDM符号（Nsym_init）。 还确定了STBC值。 基于Nsym_init值生成多个额外符号（Nsym_ext）值，其中Nsym值基于所述Nsym_init值和所述Nsym_ext值。 为了确定与分组相关联的LDPC参数，基于STBC值和Nsym_ext值确定Nldpc_ext值。
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Patent Agency Ranking
26.发明授权Systems and methods for antenna management using per-packet channel information 有权使用每分组信道信息进行天线管理的系统和方法公开(公告)号：US08891703B2
公开(公告)日：2014-11-18
申请号：US13826659
申请日：2013-03-14
Applicant: QUALCOMM Incorporated
Inventor： Sandip HomChaudhuri , Kai Shi , Alireza Raissinia , Ning Zhang
CPC classification number: H04W52/0209 , H04B7/0617 , H04B7/0822 , H04B7/0874 , H04W52/028 , Y02D70/142 , Y02D70/144 , Y02D70/22 , Y02D70/444
Abstract: A wireless device that operates in accordance with the IEEE 802.11 standard receives the preamble of a packet with the highest number of receive chains enabled, thereby obtaining the highest gain, detection sensitivity and range. The wireless device determines a signal-to-noise ratio (SNR) in response to two different short training fields (STFs) in the preamble. The wireless device also determines a modulation and coding scheme (MCS) and a number of spatial streams (Nss) used to transmit the received packet in response to a signal field of the preamble. The wireless device uses these determined parameters to identify a minimum number of the receive chains required to reliably receive the packet. The wireless device uses only the identified minimum number of receive chains to perform channel estimation and receive the data portion of the packet.
Abstract translation: 根据IEEE 802.11标准操作的无线设备接收具有最高数量的接收链启用的分组的前同步码，从而获得最高增益，检测灵敏度和范围。 无线设备响应于前导码中的两个不同的短训练场（STF）来确定信噪比（SNR）。 无线设备还确定响应于前导码的信号字段而用于发送所接收的分组的调制和编码方案（MCS）和多个空间流（Nss）。 无线设备使用这些确定的参数来识别可靠地接收分组所需的接收链的最小数量。 无线设备仅使用所识别的最小数量的接收链来执行信道估计并接收数据包的数据部分。
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公开(公告)号：US20140169348A1
公开(公告)日：2014-06-19
申请号：US13718724
申请日：2012-12-18
Applicant: QUALCOMM INCORPORATED
Inventor： Ahmed H. Hassan , Kai Shi , John Thomson , Tao-Fei S. Ng , Sankara S. Venkateswaran , James S. Cho
CPC classification number: H04W74/0808 , H04B1/0475 , H04L1/0008 , H04L25/0218 , H04L29/08612 , H04L45/026
Abstract: An electronic device includes a medium access controller (MAC) to generate frames and transmitter circuitry to convert the frames to radio-frequency (RF) analog signals for transmission. The MAC is to initiate frame generation at a time that precedes initiation of RF analog signal transmission by a specified time period. In a first mode, the MAC is to generate a dummy frame during a first portion of the specified time period and to initiate generation of a transmit frame during a subsequent second portion of the specified time period. Also in the first mode, the transmitter circuitry is to convert the dummy frame into a first analog signal, discard the first analog signal, convert the transmit frame into a second analog signal, and transmit the second analog signal.
Abstract translation: 电子设备包括用于产生帧和传输器电路的介质访问控制器（MAC），以将帧转换成用于传输的射频（RF）模拟信号。 MAC将在RF模拟信号传输开始之前的某个时间启动帧生成指定的时间段。 在第一模式中，MAC在指定时间周期的第一部分期间生成虚拟帧，并且在指定时间段的后续第二部分期间开始生成发送帧。 同样在第一模式中，发射机电路将虚拟帧转换为第一模拟信号，丢弃第一模拟信号，将发送帧转换为第二模拟信号，并发送第二模拟信号。
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公开(公告)号：US20130301764A1
公开(公告)日：2013-11-14
申请号：US13875120
申请日：2013-05-01
Applicant: QUALCOMM Incorporated
Inventor： Kai Shi , Ning Zhang
IPC: H04L27/00
CPC classification number: H04L27/0002 , H03G3/3078
Abstract: Functionality can be implemented for automatic gain control (AGC) in a wireless network device to determine whether to change the gain of the wireless network device based on determining the strength of an RF signal. At various time instants, the strength of the RF signal can be compared against different thresholds to determine the presence of and severity of the saturation of the RF front end. The gain settings can be adjusted based on comparing the strength of the RF signal with a set of thresholds. This can help the wireless network device receive RF signals with little or no distortion, and can minimize RF saturation, gain compression, false detection and other performance degradation at the wireless network device.
Abstract translation: 可以在无线网络设备中实现自动增益控制（AGC）的功能，以基于确定RF信号的强度来确定是否改变无线网络设备的增益。 在不同的时刻，RF信号的强度可以与不同的阈值进行比较，以确定RF前端的饱和度的存在和严重程度。 可以根据将RF信号的强度与一组阈值进行比较来调整增益设置。 这可以帮助无线网络设备接收到具有很少或没有失真的RF信号，并且可以最小化无线网络设备处的RF饱和度，增益压缩，错误检测和其他性能下降。
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公开(公告)号：US10159068B2
公开(公告)日：2018-12-18
申请号：US15466167
申请日：2017-03-22
Applicant: QUALCOMM Incorporated
Inventor： Ning Zhang , Xiaoxin Zhang , Kai Shi
Abstract: This disclosure provides systems, methods and apparatuses for selecting a guard interval for transmission of orthogonal frequency-division multiplexing (OFDM) symbols on an uplink (UL) channel and on a downlink (DL) channel. In some implementations, a transmitting device and a receiving device can estimate channel delay spread (CDS) information for each other's transmit channels, exchange the estimated CDS information with each other, and select a guard interval based on the estimated CDS information exchanged with each other. The transmitting device can transmit a number of OFDM symbols separated by the selected guard interval to the receiving device on the UL channel, and the receiving device can transmit a number of OFDM symbols separated by the selected guard interval to the transmitting device on the DL channel.
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公开(公告)号：US09743408B2
公开(公告)日：2017-08-22
申请号：US14960764
申请日：2015-12-07
Applicant: QUALCOMM Incorporated
Inventor： Youhan Kim , James S. Cho , Kai Shi , Ning Zhang
CPC classification number: H04W72/0453 , H04L1/0643 , H04L5/0023 , H04L5/0044 , H04L5/0053
Abstract: A first combination of frequency bands is selected for transmitting a first data packet, and a second, different combination of frequency bands is selected for transmitting a second data packet. A data stream is divided into a first set of data and a second set of data. The first set of data is allocated to the first combination of frequency bands, and the second set of data is allocated to the second combination of frequency bands.
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