公开(公告)号：US09094064B2

公开(公告)日：2015-07-28

申请号：US14042244

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Sam Alex ,  Louay Jalloul ,  Amin Mobasher

IPC: H04B7/04 ,  H04L25/02

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：US20140307816A1

公开(公告)日：2014-10-16

申请号：US14042257

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Sam Alex ,  Amin Mobasher ,  Louay Jalloul

IPC: H04B7/04 ,  H04L25/02

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。

公开(公告)号：US09407337B2

公开(公告)日：2016-08-02

申请号：US14042109

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Louay Jalloul ,  Sam Alex ,  Amin Mobasher

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

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

Abstract: Antenna systems and methods for Massive Multi-Input-Multi-Output (MIMO) (M-MIMO) communication are provided. Antennas systems include a M-MIMO transmitter architecture with a hybrid matrix structure. The hybrid matrix structure protects against transmit path component failures and ensures that a spatial rate of the MIMO transmitter is not degraded by the failures. Antenna systems and methods also include antenna selection schemes for selecting a subset of antennas from a plurality of antennas to transmit to a receiver.

Abstract translation: 提供了用于大规模多输入多输出（MIMO）（M-MIMO）通信的天线系统和方法。 天线系统包括具有混合矩阵结构的M-MIMO发射机架构。 混合矩阵结构保护发射路径组件故障，并确保MIMO发射机的空间速率不会由于故障而降级。 天线系统和方法还包括用于从多个天线中选择天线子集以发射到接收机的天线选择方案。

公开(公告)号：US09392549B2

公开(公告)日：2016-07-12

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 ,  H04L5/00 ,  H04B7/04 ,  H04W52/24 ,  H04B7/06

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：US09294259B2

公开(公告)日：2016-03-22

申请号：US14042107

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Louay Jalloul ,  Amin Mobasher ,  Sam Alex

IPC: H04L5/14 ,  H04B7/06 ,  H04B7/10

CPC classification number: H04L5/1461 ,  H04B7/0617 ,  H04B7/10 ,  H04L5/143

Abstract: A multiple input multiple output (MIMO) antenna system is implemented for communications in a wireless device. MIMO beamforming techniques are utilized to improve communications, and may be utilized in full-duplex mode. Techniques include the formation of beamforming patterns having orthogonal polarizations to one another at each communication device, but having matching polarization between transmit/receive pairs located at each respective communication device. Techniques also include the formation of beamforming patterns in a direction towards another communication device to maximize transmit power in that direction while inducing nulls in the beamforming pattern to reduce self-interference coupling via antennas configured for reception. Full-duplex communications are improved through monitoring of the self-interference coupling and adapting the beamforming patterns to reduce it. Beamforming vectors may be generated by solving a cost function that may include an additional constraint of reduction of self-interference coupling.

Abstract translation: 多输入多输出（MIMO）天线系统被实现用于无线设备中的通信。 利用MIMO波束形成技术来改善通信，并且可以在全双工模式下使用。 技术包括在每个通信设备处形成具有彼此正交极化但在每个相应通信设备处的发送/接收对之间具有匹配极化的波束成形模式。 技术还包括在朝向另一个通信设备的方向上形成波束成形模式以使该方向上的发射功率最大化，同时在波束形成模式中引起零点以减少经配置以用于接收的天线的自干扰耦合。 通过监测自干扰耦合并适应波束形成模式以减少全双工通信，从而改善了全双工通信。 波束成形向量可以通过解决可能包括减少自干扰耦合的附加约束的成本函数来生成。

公开(公告)号：US09148805B2

公开(公告)日：2015-09-29

申请号：US14274328

申请日：2014-05-09

Applicant: Broadcom Corporation

Inventor： Sam Alex ,  Louay Jalloul

IPC: H04M3/00 ,  H04W24/02 ,  H04W76/04 ,  H04W16/32

CPC classification number: H04W76/048 ,  H04W16/32 ,  H04W24/02 ,  H04W24/10 ,  H04W72/0413 ,  H04W76/28 ,  H04W84/045

Abstract: The present disclosure is directed to a system and method for transitioning small cell base stations out of a discontinuous transmission (DTX) mode. The system and method comprise monitoring at the small cell base stations uplink transmissions from user terminals (UTs) to a macrocell base station while the small cell base stations are in the DTX mode. The small cell base stations can use the monitored uplink transmissions to, for example, measure received power levels from the UTs and/or measure uplink path losses between the small cell base stations and the UTs. The small cell base stations can report these measured values back to the macrocell base station through a backhaul network. Based on these measurements, the macrocell base station can determine which small cell base stations can support which UTs without transitioning the small cell base stations out of the DTX mode.

Abstract translation: 本公开涉及用于从不连续传输（DTX）模式转换小型小区基站的系统和方法。 该系统和方法包括在小型小区基站处于DTX模式时，在小型小区基站上进行从用户终端（UT）到宏小区基站的上行链路传输的监视。 小小区基站可以使用所监视的上行链路传输来例如测量来自UT的接收功率电平和/或测量小小区基站和UT之间的上行链路路径损耗。 小型小区基站可以通过回程网络将这些测量值报告回宏小区基站。 基于这些测量，宏小区基站可以确定哪些小小区基站可以支持哪些UT，而不会将小小区基站转移到DTX模式之外。

公开(公告)号：US09143376B2

公开(公告)日：2015-09-22

申请号：US14018077

申请日：2013-09-04

Applicant: Broadcom Corporation

Inventor： Louay Jalloul ,  Mohammad Mansour ,  Sam Alex

IPC: H04L27/26

CPC classification number: H04L27/2649 ,  H04L1/0006 ,  H04L1/0026 ,  H04L1/0045 ,  H04L27/2647

Abstract: Systems and methods are provided for efficient tree-based detection of multi-carrier modulated signals, such as Orthogonal Frequency Division Multiplexing (OFDM) symbols. In an embodiment, a plurality of signals occupying respective tones are received and processed to determine an order, based on a tone quality metric, for the plurality of signals. The plurality of signals are then dispatched to a pool of tree detectors in accordance with the order. In an embodiment, the order ensures that signals occupying higher quality tones, and requiring shorter detection times, are dispatched first to the pool of tree detectors. In another embodiment, a maximum runtime of busy tree detectors of the pool is updated based signal on actual detection times to exploit the time slack of early terminating detectors.

Abstract translation: 提供了用于多载波调制信号（例如正交频分复用（OFDM））符号的有效的基于树的检测的系统和方法。 在一个实施例中，接收并处理占据各个音调的多个信号，以便根据多个信号的音质度量度确定一个顺序。 然后根据顺序将多个信号分派到树检测器池。 在一个实施例中，该顺序确保将占据更高质量音调并且需要更短检测时间的信号首先发送到树检测器池。 在另一个实施例中，池的繁忙树检测器的最大运行时间是基于实际检测时间的基于信号的信号，以利用早期终止检测器的时间松弛。

公开(公告)号：US20150163073A1

公开(公告)日：2015-06-11

申请号：US14142654

申请日：2013-12-27

Applicant: Broadcom Corporation

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

IPC: H04L25/02 ,  H04B7/04

CPC classification number: H04L25/0204 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04L25/0228 ,  H04L25/025

Abstract: In an embodiment, a method of channel estimation is provided. The method includes determining a parametric model for a channel between a first transceiver and a second transceiver and transmitting a pilot signal to the second transceiver. The receiving transceiver is configured to determine a parameter of the parametric model based at least on the pilot signal and to estimate a channel transfer function coefficient for the channel based on the parameter and the parametric model.

Abstract translation: 在一个实施例中，提供了一种信道估计的方法。 该方法包括确定第一收发器和第二收发器之间的信道的参数模型，并将导频信号发送到第二收发器。 接收收发器被配置为至少基于导频信号来确定参数模型的参数，并且基于参数和参数模型来估计信道的信道传递函数系数。

公开(公告)号：US20150162959A1

公开(公告)日：2015-06-11

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 ,  H04W36/26 ,  H04W72/04 ,  H04W16/14

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：US20150063498A1

公开(公告)日：2015-03-05

申请号：US14018077

申请日：2013-09-04

Applicant: Broadcom Corporation

Inventor： Louay JALLOUL ,  Mohammad Mansour ,  Sam Alex

IPC: H04L27/26

CPC classification number: H04L27/2649 ,  H04L1/0006 ,  H04L1/0026 ,  H04L1/0045 ,  H04L27/2647

Abstract: Systems and methods are provided for efficient tree-based detection of multi-carrier modulated signals, such as Orthogonal Frequency Division Multiplexing (OFDM) symbols. In an embodiment, a plurality of signals occupying respective tones are received and processed to determine an order, based on a tone quality metric, for the plurality of signals. The plurality of signals are then dispatched to a pool of tree detectors in accordance with the order. In an embodiment, the order ensures that signals occupying higher quality tones, and requiring shorter detection times, are dispatched first to the pool of tree detectors. In another embodiment, a maximum runtime of busy tree detectors of the pool is updated based signal on actual detection times to exploit the time slack of early terminating detectors.

Abstract translation: 提供了用于多载波调制信号（例如正交频分复用（OFDM））符号的有效的基于树的检测的系统和方法。 在一个实施例中，接收并处理占据各个音调的多个信号，以便根据多个信号的音质度量度确定一个顺序。 然后根据顺序将多个信号分派到树检测器池。 在一个实施例中，该顺序确保将占据更高质量音调并且需要更短检测时间的信号首先发送到树检测器池。 在另一个实施例中，池的繁忙树检测器的最大运行时间是基于实际检测时间的基于信号的信号，以利用早期终止检测器的时间松弛。