公开(公告)号：US09860033B2

公开(公告)日：2018-01-02

申请号：US13271113

申请日：2011-10-11

Applicant: Tamer Kadous ,  Aamod Khandekar ,  Dhananjay Ashok Gore ,  Alexei Gorokhov

Inventor： Tamer Kadous ,  Aamod Khandekar ,  Dhananjay Ashok Gore ,  Alexei Gorokhov

IPC: H04L5/00 ,  H04L27/26 ,  H04B7/04 ,  H04B7/06 ,  H04B7/0456

CPC classification number: H04L5/0023 ,  H04B7/0456 ,  H04B7/061 ,  H04B7/0671 ,  H04B7/0691 ,  H04B7/0697 ,  H04L27/2602

Abstract: Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M≧1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V≧M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T≧V. Transmission symbols are generated for the mapped symbols, e.g., based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.

公开(公告)号：US09603062B2

公开(公告)日：2017-03-21

申请号：US12269642

申请日：2008-11-12

Applicant: Gavin B. Horn ,  Fatih Ulupinar ,  Parag A. Agashe ,  Rajat Prakash ,  Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan

Inventor： Gavin B. Horn ,  Fatih Ulupinar ,  Parag A. Agashe ,  Rajat Prakash ,  Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan

IPC: H04W36/00

CPC classification number: H04W36/0055

Abstract: Systems and methodologies are described that facilitate grouping pilot identifies to indicate type and/or classification information regarding one or more access points. The access points can select or be assigned pilot identifiers from the group indicating a type or classification related to the access points. Thus, identifiers can be grouped into macrocell and/or femtocell groups or ranges such that an access point can indicate, and mobile devices can efficiently determine, whether the access point provides macrocell or femtocell coverage based on a range from which its pilot identifier is selected or assigned. In addition, the pilot identifiers can be utilized to indicate restricted association information regarding the access points.

公开(公告)号：US09419676B2

公开(公告)日：2016-08-16

申请号：US13366727

申请日：2012-02-06

Applicant: Ravi Palanki ,  Aamod Khandekar

Inventor： Ravi Palanki ,  Aamod Khandekar

IPC: H04B1/69 ,  H04L27/26 ,  H04L5/00 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04B1/69 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/023 ,  H04L25/025 ,  H04L27/2613 ,  H04L2025/03624

Abstract: A receiver for receiving a pilot generated based on a polyphase sequence having a constant time-domain envelope and a flat frequency spectrum is disclosed. In one design, the receiver includes at least one demodulator and at least one processor. The demodulator(s) receive at least one single-carrier frequency division multiple access (SC-FDMA) symbol transmitted via a communication channel and including pilot symbols generated based on a polyphase sequence. The demodulator(s) remove a cyclic prefix in each SC-FDMA symbol and demodulate the at least one SC-FDMA symbol to obtain received pilot symbols. The processor(s) derive a channel estimate for the communication channel based on the received pilot symbols.

Abstract translation: 公开了一种用于接收基于具有恒定时域包络和平坦频谱的多相序列产生的导频的接收机。 在一种设计中，接收机包括至少一个解调器和至少一个处理器。 解调器接收经由通信信道发送并包括基于多相序列生成的导频符号的至少一个单载波频分多址（SC-FDMA）符号。 解调器在每个SC-FDMA符号中去除循环前缀，并解调至少一个SC-FDMA符号以获得接收到的导频符号。 处理器基于接收到的导频符号导出通信信道的信道估计。

公开(公告)号：US20160149659A1

公开(公告)日：2016-05-26

申请号：US15011088

申请日：2016-01-29

Applicant: Ravi Palanki ,  Aamod Khandekar ,  Naga Bhushan

Inventor： Ravi Palanki ,  Aamod Khandekar ,  Naga Bhushan

IPC: H04J11/00 ,  H04W72/08 ,  H04L5/00

CPC classification number: H04J11/005 ,  H04B1/7107 ,  H04B2201/70702 ,  H04J11/004 ,  H04J11/0069 ,  H04L5/0048 ,  H04L5/0053 ,  H04W24/00 ,  H04W48/08 ,  H04W72/082

Abstract: Techniques for transmitting and detecting for overhead channels and signals in a wireless network are described. In an aspect, a base station may blank (i.e., not transmit) at least one overhead transmission on certain resources in order to detect for the at least one overhead transmission of another base station. In one design, the base station may (i) send the overhead transmission(s) on a first subset of designated resources and (ii) blank the overhead transmission(s) on a second subset of the designated resources. The designated resources may be resources on which the overhead transmission(s) are sent by macro base stations. The base station may detect for the overhead transmission(s) from at least one other base station on the second subset of the designated resources. In another aspect, the base station may transmit the overhead transmission(s) on additional resources different from the designated resources.

公开(公告)号：US09326253B2

公开(公告)日：2016-04-26

申请号：US12163835

申请日：2008-06-27

Applicant: Naga Bhushan ,  Aamod Khandekar ,  Ravi Palanki

Inventor： Naga Bhushan ,  Aamod Khandekar ,  Ravi Palanki

IPC: H04W52/00 ,  H04W52/24 ,  H04W52/32 ,  H04W52/44 ,  H04W52/38

CPC classification number: H04W52/243 ,  H04W52/325 ,  H04W52/38 ,  H04W52/44

Abstract: Systems and methodologies are described that facilitate blanking on portions of bandwidth utilized by communicating devices that are dominantly interfered by a disparate device in wireless communications networks. The portions of bandwidth can relate to critical data, such as control data, and one or more of the communicating devices can request that the dominantly interfering device blank on one or more of the portions. The communicating devices can subsequently transmit data over the blanked portions free of the dominant interference. Additionally, the dominantly interfering device can request reciprocal blanking from the one or more communicating devices.

Abstract translation: 描述了系统和方法，其有助于消除由无线通信网络中的不同设备主要干扰的通信设备所使用的带宽部分的消隐。 带宽的部分可以与诸如控制数据的关键数据相关联，并且一个或多个通信设备可以请求在一个或多个部分上的主要干扰设备空白。 通信设备可以随后在没有主导干扰的消隐部分上发送数据。 此外，主要干扰装置可以从一个或多个通信装置请求相互消隐。

公开(公告)号：US09088384B2

公开(公告)日：2015-07-21

申请号：US11511735

申请日：2006-08-28

Applicant: Aamod Khandekar ,  Avneesh Agrawal ,  Dhananjay Ashok Gore

Inventor： Aamod Khandekar ,  Avneesh Agrawal ,  Dhananjay Ashok Gore

IPC: G11B17/04 ,  H04B7/216 ,  H04B1/00 ,  H04B7/02 ,  H04J13/10 ,  H04L25/03 ,  H04B1/713 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04J13/102 ,  H04B1/713 ,  H04L5/0026 ,  H04L5/0051 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03866

Abstract: Pilot symbols transmitted from different sectors of a same base station are multiplied with a same cell specific scrambling code and a first code having low cross correlation and second codes having low cross correlation. The second code is constant over the length of the first code, but may vary for repetitions of the first code.

Abstract translation: 从相同基站的不同扇区发送的导频符号与相同的小区特定扰码和具有低互相关的第一码和具有低互相关的第二码相乘。 第二个代码在第一个代码的长度上是恒定的，但是对于第一个代码的重复可能会有所不同。

公开(公告)号：US08730877B2

公开(公告)日：2014-05-20

申请号：US11242115

申请日：2005-09-30

Applicant: Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

Inventor： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

IPC: H04W4/00

CPC classification number: H04B7/04 ,  H04L1/1819 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0206 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0256

Abstract: In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA, multiple transmitters may transmit their pilots using time division multiplexing (TDM), code division multiplexing (CDM), interleaved frequency division multiplexing (IFDM), or localized frequency division multiplexing (LFDM). The pilots from these transmitters are then orthogonal to one another. A receiver performs the complementary demultiplexing for the pilots sent by the transmitters. The receiver may derive a channel estimate for each transmitter using an MMSE technique or a least-squares technique. The receiver may receive overlapping data transmissions sent on the same time-frequency block by the multiple transmitters and may perform receiver spatial processing with spatial filter matrices to separate these data transmissions. The receiver may derive the spatial filter matrices based on the channel estimates for the transmitters and using zero-forcing, MMSE, or maximal ratio combining technique.

Abstract translation: 在采用交织FDMA（IFDMA）或集中式FDMA的单载波频分多址（SC-FDMA）系统中，多个发射机可以使用时分多路复用（TDM），码分多路复用（CDM），交错分频 复用（IFDM）或局部频分复用（LFDM）。 来自这些发射机的飞行员然后彼此正交。 接收机对由发射机发送的导频进行互补解复用。 接收机可以使用MMSE技术或最小二乘法来为每个发射机导出信道估计。 接收机可以接收由多个发射机在相同时间频率块上发送的重叠数据传输，并且可以利用空间滤波器矩阵来执行接收机空间处理以分离这些数据传输。 接收机可以基于发射机的信道估计和使用零强制，MMSE或最大比组合技术导出空间滤波器矩阵。

公开(公告)号：US08681749B2

公开(公告)日：2014-03-25

申请号：US11968642

申请日：2008-01-02

Applicant: Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Sandip Sarkar ,  Ravi Palanki

Inventor： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Sandip Sarkar ,  Ravi Palanki

IPC: H04B7/216 ,  H04W72/04 ,  H04B1/713 ,  H04W72/08 ,  H04L5/00 ,  H04B7/26

CPC classification number: H04W72/04 ,  H04B1/713 ,  H04B7/2621 ,  H04L1/1692 ,  H04L5/0053 ,  H04W52/146 ,  H04W52/16 ,  H04W52/243 ,  H04W52/247 ,  H04W52/362 ,  H04W52/60 ,  H04W72/08

Abstract: Techniques for sending control information in a wireless communication system are described. A control segment may include L≧1 tiles, and each tile may include a number of transmission units. A number of control resources may be defined and mapped to the transmission units for the control segment. For symmetric mapping, multiple sets of S≧1 control resources may be formed, and each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. For localized mapping, S>1, and each set of S control resources may be mapped to a cluster of S adjacent transmission units in one tile. For distributed mapping, S=1, and each control resource may be mapped to one transmission unit in one tile. For diversity, each control resource may be mapped to multiple (e.g., three) transmission units in at least one tile.

Abstract translation: 描述用于在无线通信系统中发送控制信息的技术。 控制段可以包括L≥1瓦片，并且每个瓦片可以包括多个传输单元。 可以将多个控制资源定义并映射到控制段的传输单元。 对于对称映射，可以形成多组S≥1个控制资源，并且每L批连续的S个控制资源组可以被映射到L个瓦片中相同位置处的S个传输单元。 对于局部映射，S> 1，并且每组S个控制资源可以被映射到一个瓦片中的S个相邻传输单元的簇。 对于分布式映射，S = 1，并且每个控制资源可以映射到一个瓦片中的一个传输单元。 对于分集，每个控制资源可以映射到至少一个瓦片中的多个（例如，三个）传输单元。

公开(公告)号：US08638759B2

公开(公告)日：2014-01-28

申请号：US12362289

申请日：2009-01-29

Applicant: Tingfang Ji ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

Inventor： Tingfang Ji ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

IPC: H04W52/22

CPC classification number: H04W36/0083 ,  H04W36/20 ,  H04W36/22 ,  H04W36/30 ,  H04W36/36 ,  H04W48/20 ,  H04W84/045 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

Abstract: Systems and methodologies are described that facilitate selecting and/or reselecting one or more access points, related cells, or carriers based at least in part on calculating an energy efficiency related to the access points. In particular, the energy efficiency can be based at least in part on an estimated pathloss and/or a level of interference related to communicating with the access points. Moreover, load parameters related to the access point can be received and evaluated in selecting and/or reselecting the access point. Thus, access points can be selected or reselected based on parameters other than forward link transmit power. In addition, pathloss and/or interference levels can be weighed based on access point type to prevent macrocell overloading.

Abstract translation: 描述了至少部分地基于计算与接入点相关的能量效率来促进选择和/或重新选择一个或多个接入点，相关小区或载波的系统和方法。 特别地，能量效率可以至少部分地基于与与接入点通信相关的估计路径损耗和/或干扰水平。 此外，可以在选择和/或重新选择接入点时接收和评估与接入点相关的负载参数。 因此，可以基于除了前向链路发送功率之外的参数来选择或重新选择接入点。 此外，可以基于接入点类型来称量路径损耗和/或干扰电平，以防止宏单元过载。

公开(公告)号：US08611284B2

公开(公告)日：2013-12-17

申请号：US11370639

申请日：2006-03-07

Applicant: Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov ,  Edward Harrison Teague

Inventor： Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov ,  Edward Harrison Teague

IPC: H04Q1/00

CPC classification number: H04W72/042 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0096 ,  H04W72/0486

Abstract: Systems and methodologies are described that facilitate dynamically supplementing or decrementing resource assignments to mobile devices in a wireless network environment without requiring transmission of replacement assignments. Supplemental assignments can be generated based on information related to mobile device need and resource availability. Moreover, resource assignments can be persisted for a mobile device.

Abstract translation: 描述了促进在无线网络环境中动态地补充或递减对移动设备的资源分配的系统和方法，而不需要传输替换分配。 可以根据与移动设备需求和资源可用性相关的信息生成补充分配。 此外，可以为移动设备持续资源分配。