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1. 发明申请

US20060171488A1 Phase advance compensation for MIMO time-switch preamble modes 有权
标题翻译： MIMO时间切换前导码模式的相位提前补偿
公开(公告)号：US20060171488A1
公开(公告)日：2006-08-03
申请号：US11046085
申请日：2005-01-28
申请人： John Rosenlof , Kirupairaj Asirvatham , Srikanth Gummadi
发明人： John Rosenlof , Kirupairaj Asirvatham , Srikanth Gummadi
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/2675 , H04L2027/003
摘要： A communications receiver is provided that includes a first and second compensators 64 and 68, a pilot tracker 60, and a demodulator 66. The first compensator 64 is operable to adjust an input signal based on both a coarse frequency offset and a fine frequency offset to produce an adjusted input signal. The pilot tracker 60 determines an estimated residual frequency offset based on at least a portion of the adjusted input signal. The demodulator 66 determines at least a first symbol sequence and a second symbol sequence based on the adjusted input signal. The second compensator 68 is operable to adjust the first symbol sequence and the second symbol sequence based on the estimate residual frequency offset.
摘要翻译：提供一种通信接收机，其包括第一和第二补偿器64和68，导频跟踪器60和解调器66.第一补偿器64可操作以基于粗频率偏移和精细频率偏移来调整输入信号产生调整后的输入信号。导频跟踪器60基于经调整的输入信号的至少一部分来确定估计的残余频率偏移。解调器66基于经调整的输入信号确定至少第一符号序列和第二符号序列。第二补偿器68可操作以基于估计残余频率偏移来调整第一符号序列和第二符号序列。

2. 发明授权

US07379514B2 Phase advance compensation for MIMO time-switch preamble modes 有权
标题翻译： MIMO时间切换前导码模式的相位提前补偿
公开(公告)号：US07379514B2
公开(公告)日：2008-05-27
申请号：US11046085
申请日：2005-01-28
申请人： John R. Rosenlof , Kirupairaj Asirvatham , Srikanth Gummadi
发明人： John R. Rosenlof , Kirupairaj Asirvatham , Srikanth Gummadi
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/2675 , H04L2027/003
摘要： A communications receiver is provided that includes a first and second compensators a pilot tracker and a demodulator. The first compensator is operable to adjust an input signal based on both a coarse frequency offset and a fine frequency offset to produce an adjusted input signal. The pilot tracker determines an estimated residual frequency offset based on at least a portion of the adjusted input signal. The demodulator determines at least a first symbol sequence and a second symbol sequence based on the adjusted input signal. The second compensator is operable to adjust the first symbol sequence and the second symbol sequence based on the estimate residual frequency offset.
摘要翻译：提供一种通信接收机，其包括第一和第二补偿器，导频跟踪器和解调器。第一补偿器可操作以基于粗频率偏移和精细频率偏移来调整输入信号以产生经调整的输入信号。导频跟踪器基于经调整的输入信号的至少一部分来确定估计的残余频率偏移。解调器基于经调整的输入信号确定至少第一符号序列和第二符号序列。第二补偿器可操作以基于估计残余频率偏移来调整第一符号序列和第二符号序列。

3. 发明授权

US09178539B2 Wireless transceiver with reduced transmit emissions 有权
标题翻译：无线收发器具有减少的发射排放
公开(公告)号：US09178539B2
公开(公告)日：2015-11-03
申请号：US13618102
申请日：2012-09-14
申请人： Todd Sutton , Srikanth Gummadi , Walid Hosseini , Lei Wang
发明人： Todd Sutton , Srikanth Gummadi , Walid Hosseini , Lei Wang
IPC分类号： H04B1/40 , H04B1/04 , H04B1/525 , H04L5/00
CPC分类号： H04B1/0475 , H04B1/525 , H04L5/0007 , H04L5/003 , H04L5/0066
摘要： Methods and apparatus for reducing transmit emissions are described herein. The transmit out of band emissions in an adjacent band can be reduced while complying with existing wireless communication standards through utilization of one or more of reduced transmit bandwidth, transmit operating band offset, and channel index remapping. The transceiver can support a receive operating band substantially adjacent to a band edge. The transmit operating band can be offset from an adjacent frequency band, and can use a narrower operating band than is supported by the receiver. The transmit baseband signal can have a reduced bandwidth to reduce the amount of noise. The frequency offset can introduce a larger transition band between the transmit operating band edges and the adjacent frequency band of interest. The transceiver can remap channel assignments to compensate for the frequency offset such that the frequency offset introduced in the transmitter is transparent to channel allocation.
摘要翻译：本文描述了用于减少发射发射的方法和装置。通过利用减少的发送带宽，发射工作频带偏移和信道索引重映射中的一个或多个，可以减少相邻频带中的发射带外发射，同时遵守现有的无线通信标准。收发器可以支持基本上与带边缘相邻的接收操作带。发射工作频带可以偏离相邻频带，并且可以使用比由接收机支持的更窄的工作频带。发射基带信号可以具有减小的带宽以减少噪声量。频率偏移可以在发射工作频带边缘和感兴趣的相邻频带之间引入更大的转换频带。收发器可以重新分配信道分配以补偿频率偏移，使得在发射机中引入的频率偏移对信道分配是透明的。

4. 发明授权

US09059785B2 Fast timing acquisition in cell search 有权
标题翻译：在小区搜索中快速定时获取
公开(公告)号：US09059785B2
公开(公告)日：2015-06-16
申请号：US13178374
申请日：2011-07-07
申请人： Dario Fertonani , Aamod Dinkar Khandekar , Srikanth Gummadi , Peter John Black
发明人： Dario Fertonani , Aamod Dinkar Khandekar , Srikanth Gummadi , Peter John Black
IPC分类号： H04B1/16 , H04B1/7073
CPC分类号： H04B1/7073 , H04B1/70735 , H04B2201/70718
摘要： Timing acquisition may be performed without typical correlation computations by determining a power of a received signal at certain points in time and using the determined power to identify gaps in the received signal. By determining gaps in the received signal, frame timing may be estimated, particularly in time-division networks where the location of guard periods within a frame is known. Gap detection may thus be used for timing acquisition.
摘要翻译：可以通过在某些时间点确定接收信号的功率并使用所确定的功率来识别接收信号中的间隙，而不进行典型的相关计算来执行定时获取。通过确定接收信号中的间隙，可以估计帧定时，特别是在已知帧中保护周期的位置的时分网络中。间隙检测因此可用于定时采集。

5. 发明授权

US08774229B2 Multidiversity handoff in a wireless broadcast system 失效
标题翻译：无线广播系统中的多分集切换
公开(公告)号：US08774229B2
公开(公告)日：2014-07-08
申请号：US11623026
申请日：2007-01-12
申请人： Dennis P. Connors , Brian D. Petry , Gene W. Marsh , Srikanth Gummadi , Keerthi S. Govind , William S. Burchill , Seema Madan
发明人： Dennis P. Connors , Brian D. Petry , Gene W. Marsh , Srikanth Gummadi , Keerthi S. Govind , William S. Burchill , Seema Madan
IPC分类号： H04J3/06
CPC分类号： H04L27/2647 , H04L5/023 , H04N21/235 , H04N21/2362 , H04N21/2381 , H04N21/2383 , H04N21/242 , H04N21/26208 , H04N21/6131 , H04N21/64315
摘要： A wireless broadcast system that collects content for distribution over a wireless communication network. The content stream is encapsulated into a stream of transport packets for broadcast over the wireless communication link. The stream of transport packets are simultaneously broadcast as part of an identical signal from a plurality of synchronized transmitters in a single frequency network. A receiver acquires the broadcast signal and synchronizes to the signal. Once the receiver is synchronized to one of the transmitters in the single frequency network, the receiver can receive signals from any, or multiple, of the transmitters in the network without re-synchronizing.
摘要翻译：无线广播系统，其收集通过无线通信网络分发的内容。内容流被封装成用于通过无线通信链路广播的传输分组流。作为来自单个频率网络中的多个同步发射机的相同信号的一部分，同时广播传输分组流。接收器获取广播信号并与信号同步。一旦接收机与单频网络中的一个发射机同步，则接收机可以从网络中的任何或多个发射机接收信号，而无需重新同步。

6. 发明授权

US08626072B2 Intercell interference mitigation 有权
标题翻译：小区干扰减轻
公开(公告)号：US08626072B2
公开(公告)日：2014-01-07
申请号：US13472040
申请日：2012-05-15
申请人： Hari Sankar , Ron Porat , Danjie Pan , Wee Peng Goh , Srikanth Gummadi , Lei Wang
发明人： Hari Sankar , Ron Porat , Danjie Pan , Wee Peng Goh , Srikanth Gummadi , Lei Wang
IPC分类号： H04B1/00
CPC分类号： H04L5/0032 , H04L1/0026 , H04L5/0007 , H04L5/0037 , H04L5/0057 , H04L5/0062 , H04L5/0066 , H04L25/0204 , H04W72/0406 , H04W72/0453 , H04W72/048 , H04W72/082
摘要： Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference.
摘要翻译：描述了用于减轻跨越多个相邻覆盖区域的基本上相同的工作频带的无线通信系统中的小区间干扰的方法和装置。操作频带可以在多个相邻或相邻的小区之间共享，例如在频率重用一个配置中。无线通信系统可以跨多个基站同步一个或多个资源分配区域或区域，并且可以协调每个资源分配区域内的置换类型。基站可以协调多个协调资源分配区域中的每一个中的导频配置。可以基于干扰级别在协调的资源分配区域中为用户站分配资源。订户站可以确定协调资源分配区域中的多个基站中的每个基站的信道估计以减轻干扰。

7. 发明申请

US20130065623A1 WIRELESS TRANSCEIVER WITH REDUCED TRANSMIT EMISSIONS 有权
标题翻译：具有减少发射功率的无线收发器
公开(公告)号：US20130065623A1
公开(公告)日：2013-03-14
申请号：US13618102
申请日：2012-09-14
申请人： Srikanth Gummadi , Lei Wang , Walid Hosseini , Todd Sutton
发明人： Srikanth Gummadi , Lei Wang , Walid Hosseini , Todd Sutton
IPC分类号： H04B15/00
CPC分类号： H04B1/0475 , H04B1/525 , H04L5/0007 , H04L5/003 , H04L5/0066
摘要： Methods and apparatus for reducing transmit emissions are described herein. The transmit out of band emissions in an adjacent band can be reduced while complying with existing wireless communication standards through utilization of one or more of reduced transmit bandwidth, transmit operating band offset, and channel index remapping. The transceiver can support a receive operating band substantially adjacent to a band edge. The transmit operating band can be offset from an adjacent frequency band, and can use a narrower operating band than is supported by the receiver. The transmit baseband signal can have a reduced bandwidth to reduce the amount of noise. The frequency offset can introduce a larger transition band between the transmit operating band edges and the adjacent frequency band of interest. The transceiver can remap channel assignments to compensate for the frequency offset such that the frequency offset introduced in the transmitter is transparent to channel allocation.
摘要翻译：本文描述了用于减少发射发射的方法和装置。通过利用减少的发送带宽，发射工作频带偏移和信道索引重映射中的一个或多个，可以减少相邻频带中的发射带外发射，同时遵守现有的无线通信标准。收发器可以支持基本上与带边缘相邻的接收操作带。发射工作频带可以偏离相邻频带，并且可以使用比由接收机支持的更窄的工作频带。发射基带信号可以具有减小的带宽以减少噪声量。频率偏移可以在发射工作频带边缘和感兴趣的相邻频带之间引入更大的转换频带。收发器可以重新分配信道分配以补偿频率偏移，使得在发射机中引入的频率偏移对信道分配是透明的。

8. 发明申请

US20120314589A1 MEASUREMENT SCHEDULING IN CELL_FACH (FORWARD ACCESS CHANNEL) AND CELL_DCH (DEDICATED CHANNEL) STATES BACKGROUND 有权
标题翻译： CELL_FACH（前进访问通道）和CELL_DCH（专用通道）状态下的测量调度背景
公开(公告)号：US20120314589A1
公开(公告)日：2012-12-13
申请号：US13157188
申请日：2011-06-09
申请人： Qingxin Chen , Aamod Dinkar Khandekar , Srikanth Gummadi , Shan Qing
发明人： Qingxin Chen , Aamod Dinkar Khandekar , Srikanth Gummadi , Shan Qing
IPC分类号： H04W24/00 , H04B17/00
CPC分类号： H04W24/10 , H04W88/06
摘要： Methods and apparatus are provided for operating in a first RAN at a working frequency, determining a priority of measurement tasks enabled by the first RAN, and dynamically scheduling the tasks according to the priority. For certain aspects, the first RAN may be a TD-SCDMA network. The measurement tasks are intended to measure at least one parameter of a serving cell in the first RAN on a primary frequency, at least one cell in the first RAN on at least one frequency other than the primary frequency, one or more cells in at least one RAN other than the first RAN (e.g., a GSM network) or any combination thereof. This dynamic assignment allows the UE to make scheduling decisions on which frequencies and RANs to measure, as well as how often these frequencies and RANs are measured, thereby providing for more efficient use of idle slots over conventional haphazard scheduling.
摘要翻译：提供了以工作频率在第一RAN中操作的方法和装置，确定由第一RAN启用的测量任务的优先级，并根据优先级动态地调度任务。对于某些方面，第一RAN可以是TD-SCDMA网络。测量任务旨在测量主频率上的第一RAN中的服务小区的至少一个参数，在主频率以外的至少一个频率上的第一RAN中的至少一个小区，至少至少一个或多个小区除了第一RAN之外的一个RAN（例如，GSM网络）或其任何组合。该动态分配允许UE对要测量的哪些频率和RAN进行调度决定，以及测量这些频率和RAN的频率，从而提供比常规随机调度更有效地利用空闲时隙。

9. 发明授权

US08331309B2 Efficient and consistent wireless downlink channel configuration 失效
标题翻译：高效一致的无线下行链路信道配置
公开(公告)号：US08331309B2
公开(公告)日：2012-12-11
申请号：US12400618
申请日：2009-03-09
申请人： Gene Marsh , Srikanth Gummadi , William Burchill , Michael Wengler
发明人： Gene Marsh , Srikanth Gummadi , William Burchill , Michael Wengler
IPC分类号： H04W4/00
CPC分类号： H04W72/042 , H04B2201/70701 , H04B2201/70702 , H04J11/0069 , H04W4/00 , H04W72/082
摘要： A configuration for downlink signals in a wireless communication system, methods of configuring the downlink signals, apparatus for generating the downlink signals, and apparatus for receiving and processing the downlink signals are described herein. Downlink signals in a wireless communication system are reconfigured in series of frames, with each frame carrying a preamble that provides fast cell search and system acquisition. In particular, the preamble includes a primary preamble and a secondary preamble, where the primary preamble is common to all sectors in a base station and all base stations in a system and the secondary preamble is effectively unique to each base station, and may be further distinguished based on a sector basis. In addition, pilot signals are aligned with base stations to occur at the same time within a frame and the PN sequence values of the pilot signals are based on a cell identification an antenna identification, thereby enabling prediction of pilots transmitted by interferers or neighboring base stations from acquisition of secondary preambles. Also, the pilot bits are selectively assigned from a center of an operating band outward. Due to the pilot placement and pilot modulation, the scheme enables interference mitigation and channel estimation without knowing the frequency bandwidth, which is especially advantageous in broadcast channel systems.
摘要翻译：这里描述了无线通信系统中的下行链路信号的配置，配置下行链路信号的方法，用于生成下行链路信号的装置，以及用于接收和处理下行链路信号的装置。在无线通信系统中的下行链路信号被重新配置为一系列帧，每个帧携带提供快速小区搜索和系统获取的前同步码。具体地，前导码包括主前同步码和次前导码，其中主前同步码对于基站中的所有扇区和系统中的所有基站是公共的，并且次前导码对于每个基站是有效唯一的，并且可以进一步区分基于行业基础。此外，导频信号与基站对准，在帧内同时发生，导频信号的PN序列值基于小区识别天线识别，从而能够预测由干扰源或相邻基站发射的导频从获得二级前导码。此外，从操作频带的中心向外选择性地分配导频比特。由于导频放置和导频调制，该方案能够在不知道频带宽度的情况下实现干扰减轻和信道估计，这在广播信道系统中特别有利。

10. 发明申请

US20120044829A1 SYSTEM AND METHOD FOR FACILITATING CO-CHANNEL AND CO-EXISTENCE VIA ENHANCED FRAME PREAMBLES 失效
标题翻译：通过增强框架前缀来促进共通道和共存的系统和方法
公开(公告)号：US20120044829A1
公开(公告)日：2012-02-23
申请号：US13285837
申请日：2011-10-31
申请人： Paul W. Piggin , Srikanth Gummadi , Ron Porat , Kenneth L. Stanwood
发明人： Paul W. Piggin , Srikanth Gummadi , Ron Porat , Kenneth L. Stanwood
IPC分类号： H04W72/04 , H04W84/00 , H04L12/28 , H04W28/00 , H04L12/26 , H04W24/00
CPC分类号： H04W16/14 , H04W8/005 , H04W48/12 , H04W76/10 , H04W92/20
摘要： Enhanced frame preambles facilitate co-channel co-existence in a wireless communication environment by having at least one preamble characteristic that connotes channel-sharing information regarding the wireless communication environment. In an exemplary embodiment, a downlink subframe is received in one or more wireless communication signals in a wireless communication environment. A preamble is detected in the downlink subframe, and at least one characteristic of the preamble is ascertained. Channel-sharing information for the wireless communication environment is determined based upon the at least one characteristic of the preamble. In another exemplary embodiment, a channel is scanned to detect secondary preambles being transmitted on the channel. A current preamble configuration, including a permutation of preamble location and preamble content corresponding to the secondary preambles, is determined, which connote channel-sharing information. A next available preamble location may be adopted based on the current preamble configuration.
摘要翻译：增强帧前同步码可以通过具有至少一个前导码特征来促进无线通信环境中的共信道共存，该前导码特征意味着关于无线通信环境的信道共享信息。在示例性实施例中，在无线通信环境中的一个或多个无线通信信号中接收下行链路子帧。在下行链路子帧中检测到前导码，并且确定前导码的至少一个特征。基于前导码的至少一个特征来确定用于无线通信环境的信道共享信息。在另一示例性实施例中，扫描信道以检测正在信道上发送的辅助前同步码。确定包括前导码位置的置换和对应于次要前导码的前导码内容的当前前置码配置，这意味着信道共享信息。可以基于当前前置码配置来采用下一个可用的前导码位置。

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