公开(公告)号：US20140362787A1

公开(公告)日：2014-12-11

申请号：US14298369

申请日：2014-06-06

Applicant: Broadcom Corporation

Inventor： Amin MOBASHER ,  Sam Alex ,  Louay Jalloul

IPC: H04W72/04 ,  H04W52/14 ,  H04B7/04

CPC classification number: H04W52/146 ,  H04B7/0478 ,  H04B7/0632 ,  H04B7/0639 ,  H04L5/00 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04W52/241

Abstract: Where receiver performance at a User Equipment (UE) is similar using a coarse precoder codebook as using a fine resolution precoder codebook, the signaling of a two-component precoder codebook is modified such that a precoder codeword is signaled to the UE in only a portion of the physical resources allocated for precoder codeword signaling to the UE. The remaining portion of the allocated physical resources is used to signal control information to improve the UE's performance.

Abstract translation: 在用户设备（UE）的接收机性能使用粗预编码器码本作为使用精细分辨率预编码器码本的情况下相似的情况下，修改双分量预编码码本的信令，使得预编码器码字仅在部分信令给UE 分配给UE的预编码器码字信令的物理资源。 所分配的物理资源的剩余部分用于信号控制信息以改善UE的性能。

公开(公告)号：US09379790B2

公开(公告)日：2016-06-28

申请号：US14142581

申请日：2013-12-27

Applicant: Broadcom Corporation

Inventor： Nihar Jindal ,  Murat Mese ,  Arogyaswami Paulraj ,  Louay Jalloul ,  Amin Mobasher ,  Sam Alex

IPC: H04B7/04 ,  H04B7/02 ,  H04B7/06 ,  H04W16/28 ,  H04W72/04

CPC classification number: H04B7/0413 ,  H04B7/024 ,  H04B7/0617 ,  H04W16/28 ,  H04W72/046

Abstract: In wireless operating environments, wireless user devices are often within the coverage area of multiple base stations. The base station providing the best uplink for the user device may be different than the base station providing the best downlink for the user device. Systems and techniques for asymmetric uplink and downlink communications for a user device are provided. In embodiments, the user device initially synchronizes with a base station. Both the uplink and downlink are initially served by this base station. A determination is then made whether to handoff the downlink for the user device to another base station. When a determination is indicated, the downlink is handed off to the second base station. Thereafter, periodic measurements are made. The determinations whether to handoff the uplink and downlink for the user device are made independently.

Abstract translation: 在无线操作环境中，无线用户设备通常在多个基站的覆盖区域内。 为用户设备提供最佳上行链路的基站可以不同于为用户设备提供最佳下行链路的基站。 提供了用于用户设备的用于不对称上行链路和下行链路通信的系统和技术。 在实施例中，用户设备最初与基站同步。 上行链路和下行链路两者最初由该基站服务。 然后确定是否将用户设备的下行链路切换到另一个基站。 当指示确定时，下行链路被切换到第二基站。 此后，进行周期测量。 决定是否切换用户设备的上行链路和下行链路是独立进行的。

公开(公告)号：US20150103960A1

公开(公告)日：2015-04-16

申请号：US14050922

申请日：2013-10-10

Applicant: Broadcom Corporation

Inventor： Ahmad MOHAMMED ,  Louay Jalloul

IPC: H04L25/02 ,  H04L1/20

CPC classification number: H04L25/0204 ,  H04L1/206 ,  H04L25/022 ,  H04L25/023

Abstract: The present disclosure is described in the exemplary context of a Long Term Evolution (LTE) cellular network and is directed to a method and apparatus for estimating a gain and phase imbalance between an in-phase path and a quadrature path of a receiver operating in such a network. The method and apparatus specifically exploit channel coherence in time and frequency, and the properties of the Primary Synchronization Signal (PSS), and/or the Secondary Synchronization Signal (SSS), and/or information in the Physical Broadcast Channel (PBCH), all of which are defined by the LTE standard, to estimate the gain and phase imbalance of the receiver while it remains connected to a base station to receive data.

Abstract translation: 本公开在长期演进（LTE）蜂窝网络的示例性上下文中描述，并且涉及用于估计在这样的操作中的接收机的同相路径和正交路径之间的增益和相位不平衡的方法和装置 一个网络。 专门利用时间和频率的信道一致性以及主同步信号（PSS）和/或次同步信号（SSS）的属性和/或物理广播信道（PBCH）中的信息的方法和装置，全部 其被LTE标准定义，以在接收机保持连接到基站以接收数据的同时估计接收机的增益和相位不平衡。

公开(公告)号：US20150036821A1

公开(公告)日：2015-02-05

申请号：US13954494

申请日：2013-07-30

Applicant: Broadcom Corporation

Inventor： Sam Alex ,  Louay Jalloul

IPC: H04W12/08 ,  H04B7/04 ,  H04W88/08

CPC classification number: H04W12/02 ,  H04B7/0617 ,  H04B7/0619 ,  H04W88/08

Abstract: Systems and methods are provided for encrypting a data transmission from a base station at the physical layer, such that the data transmission can only be decoded successfully by an intended UE. In an embodiment, a desired signal component, including a data signal for an intended UE, is combined with an interference component to generate a signal for transmission. The interference component is designed such that it falls in a null space of the channel from the base station to the intended UE and is therefore not received by the intended UE. In contrast, for an unintended UE, the interference component is designed to interfere with the desired signal component at the unintended UE, preventing the unintended UE from successfully decoding the data transmission.

Abstract translation: 提供了用于加密来自物理层的基站的数据传输的系统和方法，使得数据传输只能由目标UE成功解码。 在一个实施例中，包括用于预期UE的数据信号的期望信号分量与干扰分量组合以产生用于传输的信号。 干扰分量被设计为使得它落入从基站到目标UE的信道的零空间中，因此不被预期的UE接收。 相比之下，对于非预期的UE，干扰分量被设计为干扰非预期UE处的期望信号分量，从而防止非预期的UE成功解码数据传输。

公开(公告)号：US20140307819A1

公开(公告)日：2014-10-16

申请号：US14213031

申请日：2014-03-14

Applicant: Broadcom Corporation

Inventor： Arogyaswami PAULRAJ ,  Murat Mese ,  Yan Wang ,  Nihar Jindal ,  Louay Jalloul ,  Amin Mobasher ,  Sam Alex

IPC: H04L5/00 ,  H04B7/04

CPC classification number: H04W72/0433 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0617 ,  H04L5/0023 ,  H04L5/0092 ,  H04L5/0094 ,  H04W16/00 ,  H04W16/04 ,  H04W24/02 ,  H04W24/08 ,  H04W28/0215 ,  H04W72/04 ,  H04W88/08 ,  H04W88/10

Abstract: Systems and methods for channel assignment configuration in a multiple access point (AP) environment are provided. The multiple APs can be homogeneous or heterogeneous and can implement one or more radio access technologies (RATs), including Massive Multiple Input Multiple Output (M-MIMO) RATs. A channel assignment configuration for a user equipment (UE) can identify one or more communication channels to be established to serve the UE by one or more of the APs.

Abstract translation: 提供了多接入点（AP）环境中信道分配配置的系统和方法。 多个AP可以是同质的或异构的，并且可以实现一个或多个无线电接入技术（RAT），包括大规模多输入多输出（M-MIMO）RAT。 用户设备（UE）的信道分配配置可以识别一个或多个待建立的通信信道，以便由一个或多个AP服务于UE。

公开(公告)号：US20140307815A1

公开(公告)日：2014-10-16

申请号：US14042244

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Sam ALEX ,  Louay Jalloul ,  Amin Mobasher

IPC: H04B7/04

CPC classification number: H04B7/0413 ,  H04B7/0404 ,  H04B7/0684 ,  H04B7/0691 ,  H04L25/0202 ,  H04L25/0204 ,  H04L25/0228

Abstract: Embodiments provide systems and methods for enabling a first transceiver to learn beamforming weights (e.g., Eigen beamforming weights) to a second transceiver, without any pilot signaling or explicit beamforming weight signaling from the second transceiver. In another embodiment, beamforming weight vectors to enable a multi-symbol spatial rate can be learned by the first transceiver.

Abstract translation: 实施例提供用于使第一收发器能够向第二收发器学习波束成形权重（例如，本征波束形成权重）的系统和方法，而没有来自第二收发器的任何导频信令或显式波束成形权重信令。 在另一个实施例中，可以通过第一收发器来学习能够实现多符号空间速率的波束成形权重向量。

公开(公告)号：US09768843B2

公开(公告)日：2017-09-19

申请号：US14222202

申请日：2014-03-21

Applicant: Broadcom Corporation

Inventor： Murat Mese ,  Yan Wang ,  Nihar Jindal ,  Louay Jalloul ,  Arogyaswami Paulraj ,  Amin Mobasher ,  Sirikiat Ariyavisitakul ,  James Bennett ,  Sam Alex

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/0413 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0691

Abstract: Systems and methods for enabling a wireless backhaul network between access points (APs) in a wireless network are provided. In an embodiment, the wireless backhaul network is enabled using a Massive Multiple Input Multiple Output (MIMO) radio access technology (RAT). In another embodiment, the wireless backhaul network is established using the same RAT as used by the APs to serve user devices, and can utilize the same time and frequency resources used for user communication.

公开(公告)号：US09496933B2

公开(公告)日：2016-11-15

申请号：US14142310

申请日：2013-12-27

Applicant: Broadcom Corporation

Inventor： Louay Jalloul ,  Amin Mobasher ,  Nihar Jindal ,  Sam Alex ,  Murat Mese

IPC: H04W4/00 ,  H04B7/04 ,  H04L5/00 ,  H04B7/06 ,  H04W88/10

CPC classification number: H04B7/0452 ,  H04B7/0689 ,  H04L5/0005 ,  H04L5/0007 ,  H04L5/0053 ,  H04W88/10

Abstract: As wireless networks evolve, network providers may utilize legacy LTE devices as well as devices that support massive multi-input, multiple output (M-MIMO). Systems and methods for simultaneously servicing legacy LTE devices and M-MIMO devices are provided. In embodiments, a transmission zone for M-MIMO communications is defined within a legacy, non M-MIMO radio frame. The location of the M-MIMO transmission zone is transmitted to user devices. For example, an identification of the location of the M-MIMO transmission zone is transmitted in a system information message. In a further example, the location of the M-MIMO transmission zone is transmitted in the downlink control information. The location of the M-MIMO transmission zone may be defined dynamically based on a variety of criteria. In addition or alternatively, a set of pre-defined transmission zones may be utilized.

Abstract translation: 随着无线网络的发展，网络提供商可以利用传统的LTE设备以及支持大量多输入多输出（M-MIMO）的设备。 提供了用于同时维护传统LTE设备和M-MIMO设备的系统和方法。 在实施例中，在传统的非M-MIMO无线电帧内定义用于M-MIMO通信的传输区域。 M-MIMO传输区的位置被传送到用户设备。 例如，在系统信息消息中发送M-MIMO传输区域的位置的标识。 在另一示例中，在下行控制信息中发送M-MIMO传输区的位置。 M-MIMO传输区域的位置可以基于各种标准动态定义。 另外或替代地，可以使用一组预定义的传输区域。

公开(公告)号：US09479236B2

公开(公告)日：2016-10-25

申请号：US14081721

申请日：2013-11-15

Applicant: Broadcom Corporation

Inventor： Lek (Sirikiat) Ariyavisitakul ,  Louay Jalloul ,  Amin Mobasher

IPC: H04B7/04 ,  H04W72/12 ,  H04L25/03 ,  H04B7/06

CPC classification number: H04B7/0452 ,  H04B7/0456 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0689 ,  H04L25/03343 ,  H04L25/03942 ,  H04W72/121

Abstract: For an infinite number of transmit antennas at a base station (BS), matched filter (MF) precoding (a type of precoding used to perform SU-MIMO transmission) becomes optimal for performing spatial multiplexing. But observations have shown that precoding types for performing MU-MIMO transmission can perform significantly better than MF precoding for a realizable number of transmit antennas at the BS, even while using the simplest precoding types for MU-MIMO transmission. For large inter-cell interference typically encountered by user terminals (UTs) at or near the boundary of the cell served by the BS, MF precoding can still be used to eliminate or reduce the need for coordination among cells, which consumes network and back-haul resources.

Abstract translation: 对于基站（BS）的无限数量的发射天线，匹配滤波器（MF）预编码（用于执行SU-MIMO传输的预编码的类型）对于执行空间复用是最佳的。 但是观察结果表明，即使在使用MU-MIMO传输的最简单的预编码类型时，用于执行MU-MIMO传输的预编码类型也可以执行明显优于在BS处的可实现数量的发射天线的MF预编码。 对于在由BS服务的小区的边界处或附近的用户终端（UT）通常遇到的大的小区间干扰，MF预编码仍然可以用于消除或减少对小区之间的协调的需要， 运输资源。

公开(公告)号：US09106280B2

公开(公告)日：2015-08-11

申请号：US14042257

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Sam Alex ,  Amin Mobasher ,  Louay Jalloul

IPC: H04B7/02 ,  H04L1/02 ,  H04B7/04 ,  H04L25/02 ,  H04B7/06

CPC classification number: H04B7/0413 ,  H04B7/0404 ,  H04B7/0684 ,  H04B7/0691 ,  H04L25/0202 ,  H04L25/0204 ,  H04L25/0228

Abstract: Embodiments recognize that in MIMO and M-MIMO systems, physical antennas tend to be closely spaced to each other (e.g., a grid). As a result, a spatial correlation typically exists between physical antennas as well as between transmissions from logical antenna ports. Embodiments exploit this characteristic to reduce the amount of pilot signaling needed to enable downlink channel estimation. Specifically, embodiments limit pilot signaling to only a subset of supported logical antenna ports and rely on spatial correlation information to interpolate channels from logic antenna ports for which no pilot signaling is used.

Abstract translation: 实施例认识到，在MIMO和M-MIMO系统中，物理天线倾向于彼此紧密地间隔（例如网格）。 结果，在物理天线之间以及来自逻辑天线端口的传输之间通常存在空间相关性。 实施例利用该特性来减少启用下行链路信道估计所需的导频信令量。 具体地，实施例将导频信令限制到仅支持的逻辑天线端口的子集，并且依赖于空间相关信息从不使用导频信令的逻辑天线端口内插信道。