公开(公告)号：US20120149416A1

公开(公告)日：2012-06-14

申请号：US12967967

申请日：2010-12-14

Applicant: Sairamesh Nammi ,  Narendra Tilwani ,  Venkata Alapati

Inventor： Sairamesh Nammi ,  Narendra Tilwani ,  Venkata Alapati

IPC: H04B7/00

CPC classification number: H04B7/063

Abstract: Multiple antennas at the transmitter and receiver increase the capacity in a wireless communication system. Received signal quality can be enhanced through diversity by transmitting the same symbol on multiple antennas. Data rate can be increased through multiplexing by transmitting different symbols on the transmitting antennas. Operating in one particular mode only is generally not suitable. Choosing diversity or multiplexing by taking into account the location of a user can enhance both throughput and reliability.

Abstract translation: 发射机和接收机上的多个天线增加了无线通信系统中的容量。 通过在多个天线上发送相同的符号可以通过分集来增强接收的信号质量。 可以通过在发射天线上传送不同符号的复用来增加数据速率。 在一种特定模式下操作通常是不合适的。 通过考虑用户的位置来选择分集或多路复用可以提高吞吐量和可靠性。

公开(公告)号：US20120033715A1

公开(公告)日：2012-02-09

申请号：US12851659

申请日：2010-08-06

Applicant: Sairamesh Nammi ,  Narendra Tilwani

Inventor： Sairamesh Nammi ,  Narendra Tilwani

IPC: H04B7/10 ,  H04B1/707

CPC classification number: H04B1/71072

Abstract: A method, apparatus, and radio receiver system for canceling multi-user interference in a single-carrier radio communication system. A front-end receiver such as a RAKE receiver receives a radio signal formatted in a sequence of frames, and outputs a plurality of user signals. An ordering unit determines for a current frame, an order in which to decode and remove the interference contributions of the plurality of user signals. The order may be based on a list of user signals sorted in the order of descending signal-to-interference-plus-noise ratio (SINR), modified by the success or failure of attempts to decode each user signal. A frame calculator determines a coherence time, which is used to calculate the number of subsequent frames in which the user signals are decoded in the determined order.

Abstract translation: 一种用于在单载波无线电通信系统中消除多用户干扰的方法，装置和无线电接收机系统。 诸如RAKE接收机的前端接收机接收以帧序列格式化的无线电信号，并输出多个用户信号。 订购单元确定当前帧，解码和去除多个用户信号的干扰贡献的顺序。 该顺序可以基于按照下降的信号与干扰加噪声比（SINR）的顺序排列的用户信号的列表，由通过尝试解码每个用户信号的成功或失败而修改。 帧计算器确定相干时间，其用于以确定的顺序计算用户信号被解码的后续帧的数量。

公开(公告)号：US20110019768A1

公开(公告)日：2011-01-27

申请号：US12935833

申请日：2009-04-28

Applicant: Sairamesh Nammi ,  Shankar Venkatraman ,  Ashvin Chheda

Inventor： Sairamesh Nammi ,  Shankar Venkatraman ,  Ashvin Chheda

IPC: H04L27/00

CPC classification number: H04W72/04 ,  H04B7/024 ,  H04B7/0452 ,  H04J11/005 ,  H04L5/0023 ,  H04L5/0037

Abstract: A method increases spectral efficiency in a communication system. The communication system includes at least one mobile station and is capable of transmitting messages encoded according to a plurality of available modulation coding schemes (“MCSs”). Each available MCS includes a modulation scheme and an effective coding rate. The MCSs are indexed according to increasing complexity. A signal-to-interference ratio (“SINR”) is determined which is sufficient to satisfy a predetermined frame error rate (“FER”). A first MCS and a corresponding amount of transmissions needed to satisfy the predetermined FER at the SINR using the first MCS are determined. The first MCS has a higher effective coding rate than a second MCS. The second MCS sufficiently satisfies the predetermined FER at the SINR in a single transmission. A message encoded according to the first MCS is transmitted through the communication system using hybrid automatic repeat request (“HARQ”)

Abstract translation: 一种方法提高了通信系统中的频谱效率。 通信系统包括至少一个移动站，并且能够发送根据多个可用调制编码方案（“MCS”）编码的消息。 每个可用的MCS包括调制方案和有效的编码率。 MCS随着复杂性的增加而被索引。 确定信号干扰比（“SINR”），其足以满足预定的帧错误率（“FER”）。 确定使用第一MCS在SINR处满足预定FER所需的第一MCS和相应的传输量。 第一MCS具有比第二MCS更高的有效编码率。 第二MCS在单个传输中足够满足SINR下的预定FER。 根据第一MCS编码的消息通过使用混合自动重传请求（“HARQ”）的通信系统被发送，

公开(公告)号：US20160135210A1

公开(公告)日：2016-05-12

申请号：US14130798

申请日：2013-11-05

Applicant: Sairamesh NAMMI ,  Erik LARSSON ,  Yi-Pin Eric WANG

Inventor： Sairamesh NAMMI ,  Erik LARSSON ,  Yi-Pin Eric WANG

IPC: H04W72/12 ,  H04W48/16

CPC classification number: H04W72/1231 ,  H04W40/08 ,  H04W48/12 ,  H04W48/16 ,  H04W72/1273 ,  H04W72/1289 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/324

Abstract: A method and system for probing in a wireless communication network are disclosed. According to one aspect, a method includes directing at least one low power node to transmit a probing signal, where the probing signal includes least one code. The method also includes receiving from a wireless terminal an indication of downlink channel quality. The channel quality is based on a power of the probing signal received by the wireless terminal. The method further includes selectively directing at least one of the at least one low power node to communicate with the wireless terminal. The selecting is based on the indication of downlink channel quality.

Abstract translation: 公开了一种在无线通信网络中进行探测的方法和系统。 根据一个方面，一种方法包括引导至少一个低功率节点来发射探测信号，其中所述探测信号包括至少一个码。 该方法还包括从无线终端接收下行链路信道质量的指示。 信道质量基于由无线终端接收的探测信号的功率。 该方法还包括选择性地引导至少一个低功率节点中的至少一个与无线终端进行通信。 该选择基于下行链路信道质量的指示。

公开(公告)号：US09124329B2

公开(公告)日：2015-09-01

申请号：US13152699

申请日：2011-06-03

Applicant: Sairamesh Nammi ,  Narendra Tilwani ,  Pulin Chhatbar

Inventor： Sairamesh Nammi ,  Narendra Tilwani ,  Pulin Chhatbar

IPC: H04B7/00 ,  H04B7/06 ,  H04B17/27 ,  H04B7/04

CPC classification number: H04B7/063 ,  H04B7/0413 ,  H04B17/27

Abstract: A method of operating a wireless terminal communicating with a base station over a wireless channel may include determining whether the wireless terminal is in an edge area or an interior area of coverage of the base station. Responsive to determining that the wireless terminal is in an edge area of coverage of the base station, a transmit diversity communications rank indicator may be selected to select diversity communications over the wireless channel between the wireless terminal and the base station. Related wireless terminals are also discussed.

Abstract translation: 操作通过无线信道与基站通信的无线终端的方法可以包括确定无线终端是否在基站的边缘区域或内部区域中。 响应于确定无线终端处于基站的边缘区域，可以选择发射分集通信秩指示符，以通过无线终端和基站之间的无线信道选择分集通信。 还讨论了相关的无线终端。

公开(公告)号：US09031018B2

公开(公告)日：2015-05-12

申请号：US13586582

申请日：2012-08-15

Applicant: Sairamesh Nammi ,  Bo Göransson ,  Erik Larsson ,  Johan Hultell

Inventor： Sairamesh Nammi ,  Bo Göransson ,  Erik Larsson ,  Johan Hultell

IPC: H04W4/00 ,  H04L25/03 ,  H04W28/06

CPC classification number: H04L25/03343 ,  H04W28/06

Abstract: A method of operating a user equipment communicating with a base station of a radio access network may include selecting a multiple-input-multiple-output, MIMO, rank and a MIMO precoding entity from a codebook of MIMO precoding entities for a downlink communication from the base station to the user equipment. A modulation/coding scheme to be mapped to first and second MIMO layers of the downlink communication may be selected using the MIMO precoding entity. Channel quality information may be communicated identifying the MIMO precoding entity and the modulation/coding scheme from the user equipment to the base station. Related user equipment nodes are also discussed.

Abstract translation: 操作与无线电接入网络的基站进行通信的用户设备的方法可以包括从用于下行链路通信的MIMO预编码实体的码本中选择多输入多输出，MIMO，秩和MIMO预编码实体 基站到用户设备。 可以使用MIMO预编码实体来选择要映射到下行链路通信的第一和第二MIMO层的调制/编码方案。 可以将从MIMO用户设备向基站识别出MIMO预编码实体和调制/编码方案的信道质量信息进行通信。 还讨论了相关的用户设备节点。

公开(公告)号：US08908747B2

公开(公告)日：2014-12-09

申请号：US13477576

申请日：2012-05-22

Applicant: Sairamesh Nammi

Inventor： Sairamesh Nammi

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04B7/0486

Abstract: A mobile terminal can receive N or less different data streams transmitted in parallel over N antennas. The number of different data streams actually transmitted in parallel to the mobile terminal corresponds to transmission rank. If the speed of the mobile terminal does not exceed a predetermined threshold, the mobile terminal utilizes a full-size codebook containing precoder elements for all N transmission ranks to determine a recommended transmission rank and precoder matrix for use in transmitting data to the mobile terminal. Otherwise, the mobile terminal utilizes a reduced-size codebook which excludes the precoder elements for at least transmission rank-N to determine the recommended transmission rank and precoder matrix where transmission rank-N corresponds to N different data streams being transmitted in parallel over the N antennas. The mobile terminal transmits an indication of the recommended transmission rank and precoder matrix to the network.

Abstract translation: 移动终端可以通过N个天线接收并行发送的N个或更少不同的数据流。 实际上并行发送到移动终端的不同数据流的数量对应于传输等级。 如果移动终端的速度不超过预定阈值，则移动终端利用包含用于所有N个传输等级的预编码器元素的全尺寸码本来确定用于向移动终端发送数据的推荐传输秩和预编码器矩阵。 否则，移动终端利用减小尺寸的码本，其排除了至少传输秩N的预编码器元件，以确定推荐的传输秩和预编码器矩阵，其中传输秩N对应于在N上并行传输的N个不同数据流 天线。 移动终端向网络发送推荐的发送等级和预编码矩阵的指示。

公开(公告)号：US20140072065A1

公开(公告)日：2014-03-13

申请号：US13610319

申请日：2012-09-11

Applicant: Sairamesh NAMMI

Inventor： Sairamesh NAMMI

IPC: H04B7/02

CPC classification number: H04B7/0639 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0634

Abstract: Multiple antennas employed at the transmitter and receiver can significantly increase a MIMO system capacity, especially when channel knowledge is available at the transmitter. Channel state information may be provided to the transmitter by the receiver in a codebook based precoding feedback. An approach is proposed in which the receiver conducts a search of precoder elements of a codebook to provide the transmitter with rank information and precoder control index that enhances capacity. Unlike the conventional exhaustive search, the proposed approach reduces complexity by reducing the search space of precoder elements for consideration. Performance loss is minimized by reducing the search space of higher rank precoder elements and keeping the search space of lower rank precoder elements.

Abstract translation: 在发射机和接收机上使用的多个天线可以显着增加MIMO系统容量，特别是当发射机具​​有信道知识时。 信道状态信息可以由基于码本的预编码反馈中的接收机提供给发射机。 提出了一种方法，其中接收机对码本的预编码器元素进行搜索，以向发射机提供增强容量的等级信息和预编码器控制索引。 与常规穷举搜索不同，所提出的方法通过减少预编码器元素的搜索空间来考虑来降低复杂度。 通过减少较高级预编码器元素的搜索空间并保持较低等级预编码器元素的搜索空间，可以最大限度地降低性能损失。

公开(公告)号：US08670343B2

公开(公告)日：2014-03-11

申请号：US13157030

申请日：2011-06-09

Applicant: Sairamesh Nammi

Inventor： Sairamesh Nammi

IPC: H04W24/00

CPC classification number: H04L1/0027 ,  H04L1/0026 ,  H04W24/10

Abstract: A system and method for configuring a variable Channel Quality Information (CQI) reporting period based on a User Equipment's (UE) Doppler frequency or speed. Mobile users are divided into three Doppler frequency regions based on their speed—for example, low, medium, and high Doppler users—and are assigned the CQI reporting periods accordingly by the base station. The users in the low and high Doppler regions (i.e., UEs with low and high speeds) receive a high value for the CQI reporting period, whereas—the users in the medium Doppler region (i.e., UEs with medium speeds) receive a low value for the CQI reporting period. The UE speed-specific CQI reporting period improves the uplink capacity by adaptively controlling a UE's CQI-related uplink transmissions, without compromising on the downlink capacity/throughput.

Abstract translation: 一种用于基于用户设备（UE）多普勒频率或速度来配置可变信道质量信息（CQI）报告周期的系统和方法。 移动用户基于其速度被划分为三个多普勒频率区域，例如低，中，高多普勒用户，并由基站相应地分配CQI报告周期。 低和高多普勒区域（即具有低速和高速的UE）的用户对于CQI报告周期接收到高的值，而中等多普勒区域（即，具有中等速度的UE）的用户接收到低值 用于CQI报告周期。 UE速度专用CQI报告周期通过在不牺牲下行链路容量/吞吐量的情况下自适应地控制UE的CQI相关上行链路传输来改善上行链路容量。

公开(公告)号：US08634794B2

公开(公告)日：2014-01-21

申请号：US12854633

申请日：2010-08-11

Applicant: Sairamesh Nammi ,  Narendra Tilwani

Inventor： Sairamesh Nammi ,  Narendra Tilwani

IPC: H04B1/10

CPC classification number: H04B1/71075 ,  H04B1/71072 ,  H04B2201/709736

Abstract: A method, apparatus, and radio receiver system for canceling multi-user interference in a single-carrier radio communication system. A front-end receiver such as a RAKE receiver receives a radio signal formatted in a sequence of frames, and outputs a plurality of user signals. A processing selector selects on a frame-by-frame basis, either a first signal processing chain that serially decodes and removes the interference contributions of the user signals, or a second signal processing chain that simultaneously decodes and removes the interference contributions of the user signals in parallel. The processing selector may select the first signal processing chain when the number of user signals is greater than or equal to a threshold value, and may select the second signal processing chain when the number of user signals is less than the threshold value.

Abstract translation: 一种用于在单载波无线电通信系统中消除多用户干扰的方法，装置和无线电接收机系统。 诸如RAKE接收机的前端接收机接收以帧序列格式化的无线电信号，并输出多个用户信号。 处理选择器逐帧地选择串行解码和去除用户信号的干扰贡献的第一信号处理链，或者同时解码和去除用户信号的干扰贡献的第二信号处理链 在平行下。 当用户信号的数量大于或等于阈值时，处理选择器可以选择第一信号处理链，并且当用户信号的数量小于阈值时，可以选择第二信号处理链。