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1. 发明授权

US09264976B2 Preamble design for a wireless signal 有权
标题翻译：无线信号的前缀设计
公开(公告)号：US09264976B2
公开(公告)日：2016-02-16
申请号：US12260856
申请日：2008-10-29
申请人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Ravi Palanki , Ashwin Sampath , Avneesh Agrawal
发明人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Ravi Palanki , Ashwin Sampath , Avneesh Agrawal
IPC分类号： H04W48/08
CPC分类号： H04W48/08
摘要： Providing for management of wireless communications in a heterogeneous wireless access point (AP) environment is described herein. By way of example, system data of an over-the-air message can be configured to include information identifying a distinct type of transmitting base station. In some aspects, the information can include an access type of the base station and/or a sector ID for distinguishing the base station among large numbers of other base stations. According to other aspects, the information can include wireless channel resources designated for a particular type of base station, or blanked by the transmitting base station, to facilitate interference reduction on such resources. By employing aspects of wireless communication management disclosed herein, efficient and reliable communication can be affected in large heterogeneous AP networks.
摘要翻译：本文描述了在异构无线接入点（AP）环境中的无线通信的管理。作为示例，空中消息的系统数据可以被配置为包括标识不同类型的发送基站的信息。在一些方面，信息可以包括基站的接入类型和/或用于区分大量其他基站中的基站的扇区ID。根据其他方面，信息可以包括为特定类型的基站指定的无线信道资源，或者由发射基站消隐，以便于对这些资源进行干扰减少。通过采用这里公开的无线通信管理的方面，可以在大型异构AP网络中影响高效可靠的通信。

2. 发明授权

US08885628B2 Code division multiplexing in a single-carrier frequency division multiple access system 有权
标题翻译：在单载波频分多址系统中进行码分复用
公开(公告)号：US08885628B2
公开(公告)日：2014-11-11
申请号：US11431969
申请日：2006-05-10
申请人： Ravi Palanki , Aamod Khandekar , Arak Sutivong
发明人： Ravi Palanki , Aamod Khandekar , Arak Sutivong
IPC分类号： H04B7/216 , H04J4/00 , H04B7/00 , H04L5/00 , H04B1/692 , H04J11/00 , H04L25/02 , H04L25/03 , H04L27/26
CPC分类号： H04W72/0406 , H04B1/692 , H04J1/00 , H04J11/00 , H04J13/10 , H04L5/0021 , H04L5/0026 , H04L5/0037 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L25/0228 , H04L25/0242 , H04L25/03866 , H04L27/2613 , H04L27/2615 , H04L27/2636 , H04L27/2643
摘要： In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA (LFDMA), a transmitter generates modulation symbols for different types of data (e.g., traffic data, signaling, and pilot) and performs code division multiplexing (CDM) on at least one data type. For example, the transmitter may apply CDM on signaling and/or pilot sent on frequency subbands and symbol periods that are also used by at least one other transmitter. To apply CDM to a given data type (e.g., signaling), the transmitter performs spreading on the modulation symbols for that data type with an assigned spreading code. CDM may be applied across symbols, samples, samples and symbols, frequency subbands, and so on. The transmitter may perform scrambling after the spreading. The transmitter generates SC-FDMA symbols of the same or different symbol durations for traffic data, signaling, and pilot and transmits the SC-FDMA symbols.
摘要翻译：在采用交织FDMA（IFDMA）或局部FDMA（LFDMA）的单载波频分多址（SC-FDMA）系统中，发射机为不同类型的数据（例如业务数据，信令和导频）生成调制符号，并对至少一种数据类型进行码分复用（CDM）。例如，发射机可以在也被至少一个其他发射机使用的频率子带和符号周期上发送的信令和/或导频上应用CDM。为了将CDM应用于给定数据类型（例如，信令），发射机对具有分配的扩展码的数据类型的调制符号执行扩展。 CDM可以跨符号，样本，样本和符号，频率子带等应用。发射机可以在扩频之后执行加扰。发射机产生业务数据，信令和导频的相同或不同符号持续时间的SC-FDMA符号，并发送SC-FDMA符号。

3. 发明授权

US08849316B2 Paging and access via different nodes 有权
标题翻译：通过不同节点进行寻呼和访问
公开(公告)号：US08849316B2
公开(公告)日：2014-09-30
申请号：US12198833
申请日：2008-08-26
申请人： Gavin B. Horn , Avneesh Agrawal , Ashwin Sampath , Alexei Gorokhov , Naga Bhushan , Rajarshi Gupta , Fatih Ulupinar , Parag A. Agashe , Rajat Prakash , Aamod Khandekar , Ravi Palanki
发明人： Gavin B. Horn , Avneesh Agrawal , Ashwin Sampath , Alexei Gorokhov , Naga Bhushan , Rajarshi Gupta , Fatih Ulupinar , Parag A. Agashe , Rajat Prakash , Aamod Khandekar , Ravi Palanki
IPC分类号： H04W68/00 , H04W48/08
CPC分类号： H04W48/08 , H04W68/00
摘要： Signaling-only access may be established with an access node under certain circumstances such as, for example, upon determining that a node is not authorized for data access at the access node. A node that is not authorized for data access at an access node may still be paged by the access node through the use of signaling-only access. In this way, transmissions by the access node may not interfere with the reception of pages at the node. A first node may be selected for providing paging while a second node is selected for access under certain circumstances such as, for example, upon determining that the second node provides more desirable service than the first node.
摘要翻译：在某些情况下，例如在确定节点未被授权用于访问节点处的数据访问时，可以与接入节点建立仅信令访问。在访问节点处未被授权用于数据访问的节点仍然可以由接入节点通过使用仅信令接入进行寻呼。以这种方式，接入节点的传输可能不干扰节点处的页面的接收。可以选择第一节点来提供寻呼，而在某些情况下例如在确定第二节点提供比第一节点更理想的服务时，第二节点被选择用于接入。

4. 发明授权

US08843069B2 Interference reduction request in a wireless communication system 有权
标题翻译：无线通信系统中的干扰减少请求
公开(公告)号：US08843069B2
公开(公告)日：2014-09-23
申请号：US12262013
申请日：2008-10-30
申请人： Mohammad J. Borran , Aamod Khandekar , Naga Bhushan , Ashwin Sampath , Alexei Gorokhov , Avneesh Agrawal , Ravi Palanki , Gavin B. Horn
发明人： Mohammad J. Borran , Aamod Khandekar , Naga Bhushan , Ashwin Sampath , Alexei Gorokhov , Avneesh Agrawal , Ravi Palanki , Gavin B. Horn
IPC分类号： H04W28/00 , H04W52/24 , H04B17/00 , H04B7/06
CPC分类号： H04W52/243 , H04B7/0617 , H04B17/382 , H04W52/247
摘要： Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a first station (e.g., a base station or a terminal) may send a first message to at least one interfering station to request reduction of interference on at least one resource. The first station may send the first message in anticipation of receiving data on the at least one resource. An interfering station may receive the first message from the first station and may reduce interference on the at least one resource by reducing its transmit power and/or by steering its power in a direction different from the first station. The first station may thereafter receive data from a second station on the at least one resource. The techniques may be used for data transmission on the forward and reverse links.
摘要翻译：描述了在无线通信系统中发送具有短期干扰抑制的数据的技术。在一种设计中，第一站（例如，基站或终端）可以向至少一个干扰站发送第一消息，以请求减少对至少一个资源的干扰。第一站可以发送第一消息以预期在至少一个资源上接收数据。干扰站可以从第一站接收第一消息，并且可以通过减少其发射功率和/或通过在与第一站不同的方向上转向其功率来减少对至少一个资源的干扰。此后，第一站可以在至少一个资源上从第二站接收数据。这些技术可以用于前向和反向链路上的数据传输。

5. 发明授权

US08693444B2 Control resource mapping for a wireless communication system 有权
公开(公告)号：US08693444B2
公开(公告)日：2014-04-08
申请号：US13465943
申请日：2012-05-07
申请人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Sandip Sarkar , Ravi Palanki
发明人： Aamod Khandekar , Alexei Gorokhov , Naga Bhushan , Sandip Sarkar , Ravi Palanki
IPC分类号： H04B7/216 , H04W72/04 , H04B1/713 , H04W72/08 , H04L5/00 , H04B7/26
CPC分类号： H04W72/04 , H04B1/713 , H04B7/2621 , H04L1/1692 , H04L5/0053 , H04W52/146 , H04W52/16 , H04W52/243 , H04W52/247 , H04W52/362 , H04W52/60 , H04W72/08
摘要： 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.

6. 发明授权

US08566676B2 FEC code and code rate selection based on packet size 有权
标题翻译：基于分组大小的FEC码和码率选择
公开(公告)号：US08566676B2
公开(公告)日：2013-10-22
申请号：US11943172
申请日：2007-11-20
申请人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
发明人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
IPC分类号： H03M13/00
CPC分类号： H04L1/0007 , H04L1/0009 , H04L1/0021 , H04L1/0042 , H04L1/1812 , H04L1/1822
摘要： Techniques for encoding and decoding data are described. In an aspect, multiple code rates for a forward error correction (FEC) code may be supported, and a suitable code rate may be selected based on packet size. A transmitter may obtain at least one threshold to use for code rate selection, determine a packet size to use for data transmission, and select a code rate from among the multiple code rates based on the packet size and the at least one threshold. In another aspect, multiple FEC codes of different types (e.g., Turbo, LDPC, and convolutional codes) may be supported, and a suitable FEC code may be selected based on packet size. The transmitter may obtain at least one threshold to use for FEC code selection and may select an FEC code from among the multiple FEC codes based on the packet size and the at least one threshold.
摘要翻译：描述用于编码和解码数据的技术。在一方面，可以支持用于前向纠错（FEC）码的多个码率，并且可以基于分组大小来选择合适的码率。发射机可以获得用于码率选择的至少一个阈值，确定用于数据传输的分组大小，并且基于分组大小和至少一个阈值从多个码率中选择码率。在另一方面，可以支持不同类型的多个FEC码（例如，Turbo，LDPC和卷积码），并且可以基于分组大小来选择合适的FEC码。发射机可以获得用于FEC码选择的至少一个阈值，并且可以基于分组大小和至少一个阈值从多个FEC码中选择FEC码。

7. 发明授权

US08320407B2 Mapping of subpackets to resources in a communication system 有权
标题翻译：将子分组映射到通信系统中的资源
公开(公告)号：US08320407B2
公开(公告)日：2012-11-27
申请号：US11968631
申请日：2008-01-02
申请人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
发明人： Ravi Palanki , Jeremy H. Lin , Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal
IPC分类号： H04J4/00
CPC分类号： H04L47/15 , H04L47/70
摘要： Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least NMIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.
摘要翻译：描述在通信系统中传输数据的技术。分组可以被划分成多个子分组，并且每个子分组可以被分开编码。子分组可以被映射到分配用于分组的传输的资源，其中至少一个子分组被映射到所分配的资源的子集。分配的资源可以包括多个瓦片，其中每个瓦片对应于时间频率资源块。子分组可以被映射到瓦片，使得（i）子分组被映射到相等数量的分块以实现类似的解码性能，（ii）每个子分组被映射到至少NMIN分块（如果可用），以获得一定的最小分集如果可能，每个子分组被映射到多个分块的子集，使得子分组可以被解码而不必解调所有的分块。

8. 发明申请

US20120188994A1 PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR A COMMUNICATION SYSTEM UTILIZING FREQUENCY DIVISION MULTIPLEXING 有权
标题翻译：用于通信系统的导频传输和信道估计使用频分多路复用
公开(公告)号：US20120188994A1
公开(公告)日：2012-07-26
申请号：US13366727
申请日：2012-02-06
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04B1/715 , H04W24/00
CPC分类号： H04B1/69 , H04L5/0007 , H04L5/0048 , H04L25/0212 , H04L25/022 , H04L25/023 , H04L25/025 , H04L27/2613 , H04L2025/03624
摘要： 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.
摘要翻译：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。

9. 发明授权

US08159928B2 Signal transmission in a wireless communication system 有权
标题翻译：无线通信系统中的信号传输
公开(公告)号：US08159928B2
公开(公告)日：2012-04-17
申请号：US11864644
申请日：2007-09-28
申请人： Alexei Gorokhov , Aamod Khandekar , Ravi Palanki
发明人： Alexei Gorokhov , Aamod Khandekar , Ravi Palanki
IPC分类号： H04J11/00
CPC分类号： H04L5/0007 , H04L5/0026 , H04L5/0053 , H04L5/0073 , H04L25/0228 , H04L25/03305 , H04W24/00 , H04W48/08 , H04W52/24 , H04W52/243 , H04W52/247 , H04W52/281 , H04W52/343 , H04W52/56 , H04W52/58
摘要： Interference management is provided through use of a user-based interference control and/or a network-based interference control. For user-based interference control, the terminals are informed of the inter-sector interference observed by the neighbor sectors and can adjust their transmit powers accordingly so that the inter-sector interference is maintained within acceptable levels. For network-based interference control, each sector is informed of the inter-sector interference observed by the neighbor sectors and regulates data transmissions for its terminals such that the inter-sector interference is maintained within acceptable levels. Each system may utilize only user-based interference control, or only network-based interference control, or both.
摘要翻译：通过使用基于用户的干扰控制和/或基于网络的干扰控制来提供干扰管理。对于基于用户的干扰控制，向终端通知相邻扇区观测到的扇区间干扰，并且可以相应地调整它们的发射功率，使得扇区间干扰保持在可接受的水平内。对于基于网络的干扰控制，每个扇区被通知相邻扇区观测到的扇区间干扰，并调节其终端的数据传输，使得扇区间干扰保持在可接受的水平内。每个系统可以仅利用基于用户的干扰控制，或仅使用基于网络的干扰控制，或两者。

10. 发明授权

US08135088B2 Pilot transmission and channel estimation for a communication system utilizing frequency division multiplexing 有权
标题翻译：利用频分复用的通信系统的导频传输和信道估计
公开(公告)号：US08135088B2
公开(公告)日：2012-03-13
申请号：US11175607
申请日：2005-07-05
申请人： Ravi Palanki , Aamod Khandekar
发明人： Ravi Palanki , Aamod Khandekar
IPC分类号： H04L27/00
CPC分类号： H04B1/69 , H04L5/0007 , H04L5/0048 , H04L25/0212 , H04L25/022 , H04L25/023 , H04L25/025 , H04L27/2613 , H04L2025/03624
摘要： A transmitter generates a pilot having a constant time-domain envelope and a flat frequency spectrum based on a polyphase sequence. To generate a pilot IFDMA symbol, a first sequence of pilot symbols is formed based on the polyphase sequence and replicated multiple times to obtain a second sequence of pilot symbols. A phase ramp is applied to the second pilot symbol sequence to obtain a third sequence of output symbols. A cyclic prefix is appended to the third sequence of output symbols to obtain an IFDMA symbol, which is transmitted in the time domain via a communication channel. The pilot symbols may be multiplexed with data symbols using TDM and/or CDM. A pilot LFDMA symbol may also be generated with a polyphase sequence and multiplexed using TDM or CDM. A receiver derives a channel estimate based on received pilot symbols and using minimum mean-square error, least-squares, or some other channel estimation technique.
摘要翻译：发射机产生具有恒定时域包络和基于多相序列的平坦频谱的导频。为了产生导频IFDMA符号，基于多相序列形成第一导频符号序列并多次复制以获得导频符号的第二序列。将相位斜坡施加到第二导频符号序列以获得第三输出符号序列。循环前缀被附加到第三输出符号序列以获得经由通信信道在时域中发送的IFDMA符号。可以使用TDM和/或CDM将导频符号与数据符号复用。也可以使用多相序列生成导频LFDMA符号，并使用TDM或CDM进行复用。接收机基于接收到的导频符号并使用最小均方误差，最小二乘法或一些其它信道估计技术来导出信道估计。

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