公开(公告)号：US20130136166A1

公开(公告)日：2013-05-30

申请号：US13750627

申请日：2013-01-25

Applicant: Broadcom Corporation

Inventor： David GARRETT ,  Robert Lorenz ,  Djordje Tujkovic

IPC: H04L12/26

CPC classification number: H04L43/50 ,  H04B17/345 ,  H04L5/0007

Abstract: Embodiments describe a method of measuring noise and interference within transceivers of an OFDM wireless transmission system, or similar communication system, including a number of receivers communicating with one or more base stations in cell or sector arrangements. The transmitter schedules a transmission burst for a non-existent user (receiver) using wireless transmission traffic. In an OFDM system, this corresponds to a certain set of subcarriers in the time/frequency arrangement. Thus, in the receive frame structure, the data and pilot subcarriers are guaranteed to be only noise and interference from adjacent sectors. The receiver can accurately measure the noise and interference without needing to cancel out the transmitted signal. Therefore, the system is assured that there is no desired signal as part of this measurement. The noise and interference measurement process can be appropriately scheduled so that it does not impact the overall throughput of the system. This mechanism creates a deterministic place (in time and/or frequency) within the transmission, where no desired signal is required.

Abstract translation: 实施例描述了测量OFDM无线传输系统或类似通信系统的收发机内的噪声和干扰的方法，所述OFDM无线传输系统或类似通信系统包括与小区或扇区布置中的一个或多个基站通信的多个接收机。 发射机使用无线传输业务为不存在的用户（接收机）调度传输突发。 在OFDM系统中，这对应于时间/频率布置中的一组子载波。 因此，在接收帧结构中，数据和导频子载波被保证只是来自相邻扇区的噪声和干扰。 接收机可以准确测量噪声和干扰，而不需要消除传输的信号。 因此，系统确保没有期望的信号作为该测量的一部分。 可以适当地调度噪声和干扰测量过程，使其不影响系统的整体吞吐量。 该机制在传输期间创建确定性的位置（在时间和/或频率上），其中不需要所需的信号。

公开(公告)号：US09344167B2

公开(公告)日：2016-05-17

申请号：US14298358

申请日：2014-06-06

Applicant: Broadcom Corporation

Inventor： Krishna Gomadam ,  Djordje Tujkovic

IPC: H04B7/02 ,  H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0647 ,  H04L25/03343 ,  H04L25/03898

Abstract: Embodiments provide approaches for sub-sampling a two-component precoder codebook to reduce the overhead associated with signaling the codebook in periodic Channel State Information (CSI) reports from a user equipment (UE) to a base station. In one embodiment, a first component of the codebook is sub-sampled to accommodate a payload capacity of a Physical Uplink Control Channel (PUCCH) CSI Report of Type 1. In another embodiment, both the first component and the second component of the codebook are sub-sampled to accommodate a maximum payload capacity associated with a PUCCH CSI report.

Abstract translation: 实施例提供了用于对双分量预编码器码本进行子采样以减少与从用户设备（UE）到基站的周期性信道状态信息（CSI）报告中向码本发信号通信相关的开销的方法。 在一个实施例中，码本的第一分量被子采样以适应类型1的物理上行链路控制信道（PUCCH）CSI报告的有效载荷容量。在另一个实施例中，码本的第一分量和第二分量都是 子采样以适应与PUCCH CSI报告相关联的最大有效载荷容量。

公开(公告)号：US09232510B2

公开(公告)日：2016-01-05

申请号：US14324798

申请日：2014-07-07

Applicant: Broadcom Corporation

Inventor： Sriram Mudulodu ,  Djordje Tujkovic ,  Arogyaswami Paulraj

IPC: H04W4/00 ,  H04W72/04 ,  H04W8/30 ,  H04J3/16

CPC classification number: H04W72/0413 ,  H04W8/30

Abstract: A method and apparatus of selecting a number of uplink sounding sub-carriers are disclosed. One method includes estimating an uplink channel of between a base station and a subscriber. A time domain channel response is determined from the estimated uplink channel. A sub-carrier distribution of uplink sounding sub-carriers is selected based on characteristics of the time domain channel response, wherein the distribution defines a spacing of pilot sub-carriers within the uplink sounding symbol. The subscriber transmits uplink sounding symbols having the selected sub-carrier distribution.

公开(公告)号：US20140192916A1

公开(公告)日：2014-07-10

申请号：US14147245

申请日：2014-01-03

Applicant: Broadcom Corporation

Inventor： Krishna Srikanth GOMADAM ,  Djordje Tujkovic

IPC: H04B7/04

CPC classification number: H04B7/0469 ,  H04B7/0478 ,  H04B7/065

Abstract: Systems using a transmit precoder codebook designed for a four-transmitter (4Tx) antenna configuration are described. The 4Tx antenna configuration is an attractive option for base stations in cellular network environments due to site-acquiring advantages and robust performance. In an embodiment, the transmit precoder codebook can be used for a variety of transmit antenna configurations and has a high resolution to enable beamforming and/or nulling. In another embodiment, the transmit precoder codebook is a two-component codebook, with a first precoder component signaled at a first frequency and a second precoder component signaled at a second higher frequency.

Abstract translation: 描述了使用设计用于四发射机（4Tx）天线配置的发射预编码器码本的系统。 4Tx天线配置是蜂窝网络环境中基站的一个有吸引力的选择，因为站点获取优势和强大的性能。 在一个实施例中，发送预编码器码本可以用于各种发射天线配置，并且具有高分辨率以实现波束成形和/或归零。 在另一实施例中，发送预编码器码本是双分量码本，具有以第一频率发信号的第一预编码器分量和以第二较高频率发信号的第二预编码器分量。

公开(公告)号：US20140148118A1

公开(公告)日：2014-05-29

申请号：US13835318

申请日：2013-03-15

Applicant: BROADCOM CORPORATION

Inventor： Robert LORENZ ,  Djordje Tujkovic ,  Erik Stauffer

IPC: H04W4/22

CPC classification number: H04W4/22 ,  H04W4/90 ,  H04W52/0209 ,  H04W76/50 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164

Abstract: Embodiments provide methods and systems for transmitting an emergency (SOS) message from a user (UE) to a cellular network in a highly robust and energy efficient manner. Specifically, embodiments enable the SOS message to be sent in a synchronous manner despite the asynchronous nature of the network, which significantly enhances the probability of successful reception of the SOS message by at least one base station (eNodeB) of the network. Embodiments further provide highly robust SOS message transmission and reception schemes configured to enhance the successful detection and decoding of the SOS message by at least one base station of the cellular network. In addition, embodiments enable the synchronous transmission of the SOS message to the network without requiring network attachment by the UE. This makes embodiments highly suited for emergency situations in which network coverage is affected and can enable significant and precious power savings at the UE.

Abstract translation: 实施例提供了用于以高度鲁棒且高能效的方式从用户（UE）向蜂窝网络发送紧急（SOS）消息的方法和系统。 具体地，实施例使得SOS消息能够以同步方式发送，尽管网络的异步性质，这显着增强了由网络的至少一个基站（eNodeB）成功接收SOS消息的概率。 实施例还提供了高度鲁棒的SOS消息传输和接收方案，其被配置为增强蜂窝网络的至少一个基站对SOS消息的成功检测和解码。 此外，实施例能够使SOS消息同步传输到网络，而不需要UE的网络连接。 这使得实施例非常适合于其中影响网络覆盖的紧急情况，并且可以在UE处实现显着和宝贵的功率节省。