公开(公告)号：US20130235825A1

公开(公告)日：2013-09-12

申请号：US13857025

申请日：2013-04-04

Applicant: QUALCOMM INCORPORATED

Inventor： J. Rodney WALTON ,  John W. KETCHUM ,  Mark S. WALLACE ,  Steven J. HOWARD

IPC: H04B7/04

CPC classification number: H04B7/0417 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0628 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04J11/003 ,  H04J11/0053 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/06 ,  H04L5/0073 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/0248 ,  H04L25/03343 ,  H04L25/03891 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/261 ,  H04L27/2647 ,  H04L27/2675 ,  H04W16/28 ,  H04W52/50 ,  H04W72/046 ,  H04W74/04

Abstract: A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas. For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.

Abstract translation: MIMO系统支持多种空间复用模式，以提高性能和更大的灵活性。 这些模式可以包括（1）在正交空间信道上将多个数据流发送到单个接收机的单用户导向模式，（2）单个用户非导向模式，其将多个数据流从多个天线发送到单个接收机 在发射机处没有空间处理，（3）多用户导向模式，其在发射机处通过空间处理同时向多个接收机发送多个数据流，以及（4）多用户非导向模式，其从 在具有多个天线的发射机到接收机处没有空间处理的多个天线（共同定位或非共同定位）。 对于在下行链路和/或上行链路上选择用于数据传输的每组用户终端，从系统支持的多个空间复用模式中，为用户终端机选择空间复用模式。

公开(公告)号：US20130182598A1

公开(公告)日：2013-07-18

申请号：US13788743

申请日：2013-03-07

Applicant: QUALCOMM Incorporated

Inventor： Irina MEDVEDEV ,  John W. KETCHUM ,  J. Rodney WALTON

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04L1/0002 ,  H04L1/0016 ,  H04L1/0019 ,  H04L1/0025 ,  H04L1/06 ,  H04L1/20

Abstract: Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver.

Abstract translation: 在本公开中提出了在具有变化的SNR的多个空间信道的多通道通信系统中选择用于数据传输的合适传输模式的技术。 对于某些实施例，可以应用闭环技术，其中调整用于计算反馈到发射机的有效SNR值的回退因子。 还提出了一种开环速率控制方案，其中发射机可以基于在接收机处是否发送的分组被错误地接收来选择数据速率和数量的数据流。

公开(公告)号：US20180227021A1

公开(公告)日：2018-08-09

申请号：US15939145

申请日：2018-03-28

Applicant: QUALCOMM Incorporated

Inventor： John KETCHUM ,  Mark WALLACE ,  J. Rodney WALTON ,  Steven HOWARD

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04B7/08 ,  H04L25/02 ,  H04L5/00 ,  H04L27/26 ,  H04L1/08 ,  H04L1/06 ,  H04L25/03 ,  H04L1/16 ,  H04L27/00 ,  H04W16/28 ,  H04W52/50 ,  H04W28/20

CPC classification number: H04B7/0421 ,  H04B7/043 ,  H04B7/0615 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/006 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2027/0089 ,  H04W16/28 ,  H04W28/20 ,  H04W52/50

Abstract: Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot.

公开(公告)号：US20140056293A1

公开(公告)日：2014-02-27

申请号：US14070086

申请日：2013-11-01

Applicant: QUALCOMM Incorporated

Inventor： Ravi KUMAR ,  J. Rodney WALTON ,  Qiang Fu ,  Subrahmanyam DRAVIDA

IPC: H04W76/02

CPC classification number: H04W76/11 ,  H04L63/0428 ,  H04W8/005 ,  H04W12/04 ,  H04W12/06 ,  H04W28/0268 ,  H04W48/16 ,  H04W84/18

Abstract: For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. Other aspects, embodiments, and features are also claimed and described.

Abstract translation: 对于在自组织无线网络中的对等呼叫，无线设备执行目标无线设备的发现，执行目标无线设备的认证并生成会话密钥（例如，使用预共享密钥或证书 在无线设备上提供）与目标无线设备形成自组织无线网络，并经由自组织无线网络与目标无线设备进行点对点通信。 无线设备可以使用指定与该无线设备进行通信的无线设备的标识符列表来执行发现。 无线设备可以基于其用户特定标识符（例如，其电话号码）和/或用于目标无线设备的用户特定标识符导出用于标识自组织无线网络的服务集标识符（SSID）。 还要求和描述其它方面，实施例和特征。