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公开(公告)号：WO2004040813A1
公开(公告)日：2004-05-13
申请号：PCT/US2003/034506
申请日：2003-10-29
Applicant: QUALCOMM INCORPORATED
Inventor： KRISHNAN, Ranganathan , KADOUS, Tamer
IPC: H04B17/00
CPC classification number: H04W52/325 , H04L25/0212 , H04L25/022 , H04L25/023 , H04W52/24 , H04W52/34 , H04W52/42
Abstract: Techniques to estimate the frequency response of a wireless channel in an OFDM system. In one method, an initial estimate of the frequency response of the wireless channel is obtained for a first group of subbands based on a pilot transmission received via the subbands in the first group. An estimate of the impulse response of the wireless channel is then derived based on the initial frequency response estimate. An enhanced estimate of the frequency response of the wireless channel is then derived for a second group of subbands based on the impulse response estimate. The first and second groups may each include all or only a subset of the usable subbands. Subband multiplexing may be used to allow simultaneous pilot transmissions by multiple terminals on their associated groups of subbands.
Abstract translation: 估计OFDM系统中无线信道的频率响应的技术。 在一种方法中，基于经由第一组中的子带接收的导频传输，针对第一组子带获得无线信道的频率响应的初始估计。 然后基于初始频率响应估计推导出无线信道的脉冲响应的估计。 然后基于脉冲响应估计对第二组子带导出对无线信道的频率响应的增强估计。 第一组和第二组可以各自包括全部或仅一个可用子带的子集。 子带复用可用于允许在其相关联的子带组上的多个终端的同时导频传输。
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公开(公告)号：WO2004036768A2
公开(公告)日：2004-04-29
申请号：PCT/US2003/032774
申请日：2003-10-14
Applicant: QUALCOMM INCORPORATED
Inventor： KADOUS, Tamer , AGRAWAL, Avneesh , VIJAYAN, Rajiv
IPC: H04B
CPC classification number: H04L5/006 , H04B7/0417 , H04L1/0003 , H04L1/0009 , H04L1/0071 , H04L1/0618 , H04L5/0023 , H04L5/0046 , H04L25/0206 , H04L25/0224 , H04L2025/03414 , H04W52/42
Abstract: A "power adaptive circular" (PAC) transmission scheme that can support both spatial multiplexing and transmit diversity for multi-carrier MIMO systems and has a number of desirable characteristics, including the ability to: transmit a variable number of symbol streams, provide transmit diversity for each transmitted symbol stream, support coded interference estimation technique at a receiver, and use power efficiently. In one method, at least one stream of symbols is received for transmission on a plurality of subbands and from a plurality of antennas. The at least one stream of symbols is multiplexed such that (1) the symbols in each stream are transmitted from the plurality of antennas (e.g., diagonally across the subbands and antennas) and (2) the at least one stream starts in the same subband. A stream of multiplexed symbols is formed for each antenna and further processed, and may be transmitted at full power available for the antenna.
Abstract translation: 一种能够支持多载波MIMO系统的空间复用和发射分集的“功率自适应循环”（PAC）传输方案，并且具有许多期望的特性，包括：传输可变数量的符号流的能力，提供发射分集 对于每个发送的符号流，在接收器处支持编码干扰估计技术，并且有效地使用功率。 在一种方法中，接收至少一个符号流以在多个子带上和从多个天线发射。 所述至少一个符号流被多路复用，使得（1）每个流中的符号从多个天线（例如，对角地跨越子带和天线）发送，并且（2）至少一个流在相同子带中开始 。 为每个天线形成复用符号流并进一步处理，并且可以以可用于天线的全功率发送。
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公开(公告)号：WO2020068995A1
公开(公告)日：2020-04-02
申请号：PCT/US2019/052976
申请日：2019-09-25
Applicant: QUALCOMM INCORPORATED
Inventor： CHAKRABORTY, Kaushik , ZHANG, Xiaoxia , SUN, Jing , KADOUS, Tamer
Abstract: Wireless communications systems and methods related to communications in a network that supports data transmitted in an unlicensed frequency band and a licensed frequency band are provided. A first wireless communication device communicates, with a second wireless communication device, a configuration indicating a first resource in an unlicensed frequency band and a second resource in a licensed band. The first wireless communication device communicates, with the second wireless communication device in the unlicensed frequency band, a first communication signal based on the configuration. The first wireless communication device communicates with the second wireless communication device in the licensed frequency band, a second communication signal based on at least one of a channel status of the unlicensed frequency band or a transmission parameter associated with at least one of the first communication signal or the second communication signal.
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94.发明申请
公开(公告)号：WO2020055764A1
公开(公告)日：2020-03-19
申请号：PCT/US2019/050246
申请日：2019-09-09
Applicant: QUALCOMM INCORPORATED
Inventor： LIU, Chih-Hao , FAKOORIAN, Seyed Ali Akbar , YERRAMALLI, Srinivas , TIAN, Qingjiang , RADULESCU, Andrei Dragos , KADOUS, Tamer
IPC: H04W72/08
Abstract: Generally, the described techniques provide for a base station transmitting an indication of a set of one or more available channels to a user equipment (UE). The base station may transmit to the UE a first downlink burst using a first channel and a first frame period. In some cases, the base station may detect interference associated with the first downlink burst, for example, by performing a listen-before-talk (LBT) procedure or through an interference management resources (IMR) procedure in which the base station transmits reference signal signals to the UE that the UE may use to return a report on measured interference. If the base station detects interference, the base station may transmit to the UE an instruction to switch to a second channel and a second frame period, where the second channel may be selected from the set of one or more available channels.
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公开(公告)号：WO2020009928A1
公开(公告)日：2020-01-09
申请号：PCT/US2019/039801
申请日：2019-06-28
Applicant: QUALCOMM INCORPORATED
Inventor： ZHANG, Xiaoxia , SUN, Jing , KADOUS, Tamer
IPC: H04W74/08
Abstract: Wireless communications systems and methods related to sharing a communication medium with private networks are provided. In one embodiment, a first wireless communication device communicates with a second wireless communication device during a first transmission opportunity (TXOP) in a spectrum, a channel reservation signal to reserve a second TXOP in the spectrum subsequent to the first TXOP. The first wireless communication device communicates, with the second wireless communication device during the second TXOP, a communication signal. In one embodiment, a first wireless communication device monitors, during a first TXOP in a spectrum, for a channel reservation signal to reserve a second TXOP in the spectrum by a second wireless communication device of a priority operator, the second TXOP being subsequent to the first TXOP. The first wireless communication device determines whether to communicate with a third wireless communication device during the second TXOP based on the monitoring
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Patent Agency Ranking
公开(公告)号：WO2019236602A1
公开(公告)日：2019-12-12
申请号：PCT/US2019/035427
申请日：2019-06-04
Applicant: QUALCOMM INCORPORATED
Inventor： ZHANG, Xiaoxia , KADOUS, Tamer , YOO, Taesang , XUE, Yisheng , CHENDAMARAI KANNAN, Arumugam , SUN, Jing , DAMNJANOVIC, Aleksandar
Abstract: Wireless communications systems and methods related to communicating in a frequency band across multiple adjacent carriers are provided. A first wireless communication device performs first sensing in a first sensing time designated for a first channel, the first channel being an operational channel of the first wireless communication device. The first wireless communication device performs second sensing in a second sensing time designated for a second channel adjacent to the first channel, the second channel being an operational channel of a second wireless communication device. The first wireless communication device communicates with a third wireless communication device in the first channel a communication signal in the first channel based on the first sensing and the second sensing.
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公开(公告)号：WO2019217629A1
公开(公告)日：2019-11-14
申请号：PCT/US2019/031441
申请日：2019-05-09
Applicant: QUALCOMM INCORPORATED
Inventor： BHATTAD, Kapil , SUN, Jing , ZHANG, Xiaoxia , THYAGARAJAN, Ananta Narayanan , KADOUS, Tamer
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may rate match an uplink transmission around a set of resources reserved by a base station. The base station may indicate a set of reserved resources which overlaps an uplink resource allocation to the UE. The base station may transmit an indicator of the reserved resources, and the UE may identify a location of a clear channel assessment (CCA) gap in a symbol period relative to the reserved resources. By rate matching around the reserved resources and one or more CCA gaps, the UE may transmit uplink information despite the allocated uplink resources colliding with the reserved resources.
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公开(公告)号：WO2019209590A1
公开(公告)日：2019-10-31
申请号：PCT/US2019/027921
申请日：2019-04-17
Applicant: QUALCOMM INCORPORATED
Inventor： DAMNJANOVIC, Aleksandar , YERRAMALLI, Srinivas , ZHANG, Xiaoxia , KADOUS, Tamer , WEI, Yongbin , SUN, Jing , RADULESCU, Andrei Dragos
IPC: H04W74/08
Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration. Opportunistic frequency switching of embodiments may utilize the medium sensing locations for opportunistically switching between a sequence of the frequency transmission units for implementing frequency diversity FBE access.
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99.发明申请
公开(公告)号：WO2019209584A1
公开(公告)日：2019-10-31
申请号：PCT/US2019/027740
申请日：2019-04-16
Applicant: QUALCOMM INCORPORATED
Inventor： CHAKRABORTY, Kaushik , ZHANG, Xiaoxia , SUN, Jing , KADOUS, Tamer
IPC: H04W74/08
Abstract: Methods, systems, and devices for wireless communications are described. In systems supporting unlicensed downlink and licensed uplink communications, transmitter-based and/or receiver-based listen-before-talk may be implemented. In a transmitter-based scheme, a base station performs listen-before-talk on a downlink unlicensed band to monitor for signals from other base stations. In a first receiver-based scheme, a user equipment may send a clear to send signal on the licensed uplink channel or unlicensed downlink channel to assist a listen-before-talk operation at a serving base station. In a second receiver-based scheme, the user equipment monitors for downlink preamble transmissions from base stations other than a serving base station and reports detected preambles to the serving base station. The base station may schedule the user equipment based on the reported preambles. In some cases, the serving base station may signal other base stations to back off and reduce interference on the unlicensed downlink spectrum.
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100.发明申请
公开(公告)号：WO2019165176A1
公开(公告)日：2019-08-29
申请号：PCT/US2019/019099
申请日：2019-02-22
Applicant: QUALCOMM INCORPORATED
Inventor： FAKOORIAN, Seyed Ali Akbar , YERRAMALLI, Srinivas , ZHANG, Xiaoxia , SUN, Jing , KADOUS, Tamer
IPC: H04W74/08
Abstract: Techniques and apparatus for enhancing uplink grant-free transmissions and/or downlink semi-persistent scheduling (SPS) transmissions for uplink ultra-reliable low latency communications (URLLC) are described. One technique includes receiving a first configuration for a first grant-free communication and a second configuration for at least one second grant-free communication. Grant-free communications are performed based on at least one of the first configuration or the second configuration
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