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91. 发明申请

US20090046570A1 EIGEN-BEAMFORMING FOR WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：用于无线通信系统的EIGEN-BEAMFORMING
公开(公告)号：US20090046570A1
公开(公告)日：2009-02-19
申请号：US12189483
申请日：2008-08-11
申请人： Sandip Sarkar , Byoung-Hoon Kim , Durga Prasad Malladi , Juan Montojo
发明人： Sandip Sarkar , Byoung-Hoon Kim , Durga Prasad Malladi , Juan Montojo
IPC分类号： H04J11/00
CPC分类号： H04B7/0417 , H04B7/0434 , H04B7/063 , H04B7/0632 , H04L5/14 , H04L25/0204 , H04L25/0228 , H04L25/0242 , H04L25/03343 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for sending multiple-input multiple-output (MIMO) transmissions in wireless communication systems are described. In one design, a transmitter sends a first reference signal via a first link, e.g., a cell-specific reference signal via the downlink. The transmitter receives channel quality indicator (CQI) information determined by a receiver based on the first reference signal. The transmitter also receives a second reference signal from the receiver via a second link, e.g., a sounding reference signal via the uplink. The transmitter obtains at least one MIMO channel matrix for the first link based on the second reference signal. The transmitter determines at least one precoding matrix based on the at least one MIMO channel matrix, e.g., in accordance with ideal eigen-beamforming or pseudo eigen-beamforming. The transmitter then sends a data transmission to the receiver based on the at least one precoding matrix and the CQI information.
摘要翻译：描述了在无线通信系统中发送多输入多输出（MIMO）传输的技术。在一种设计中，发射机经由第一链路发送第一参考信号，例如经由下行链路的小区特定参考信号。发射机基于第一参考信号接收由接收机确定的信道质量指示符（CQI）信息。发射机还经由第二链路从接收机接收第二参考信号，例如经由上行链路的探测参考信号。发射机基于第二参考信号获得用于第一链路的至少一个MIMO信道矩阵。发射机基于至少一个MIMO信道矩阵来确定至少一个预编码矩阵，例如，根据理想的本征波束形成或伪特征波束形成。然后，发射机基于至少一个预编码矩阵和CQI信息向接收机发送数据传输。

92. 发明授权

US07391753B2 Method for handoff between an asynchronous CDMA base station and a synchronous CDMA base station 失效
标题翻译：异步CDMA基站与同步CDMA基站之间切换的方法
公开(公告)号：US07391753B2
公开(公告)日：2008-06-24
申请号：US10682046
申请日：2003-10-08
申请人： Edward G. Tiedemann, Jr. , Daisuke Terasawa , Sandip Sarkar
发明人： Edward G. Tiedemann, Jr. , Daisuke Terasawa , Sandip Sarkar
IPC分类号： H04Q7/00 , H04Q7/20 , H04B7/216
CPC分类号： H04B1/7075 , H04B2201/70701 , H04W36/0083 , H04W36/14
摘要： An improved method for facilitating handoff between an asynchronous and a synchronous base station. A method for determining a pilot channel PN offset of a pilot channel transmitted by a wireless base station. In a first embodiment, the method includes correlating a PN sequence with a received pilot signal to acquire a PN frame timing, receiving at least one search code burst aligned with the PN frame timing, the at least one search code burst signifying the pilot channel PN offset, and comparing the at least one search code burst to a set of codewords, each codeword representing a predetermined PN offset. From the search code bursts, the mobile station is able to quickly determine the PN offset of the transmitting base station, and thereby identify it. Methods for transmitting a complementary set of forward link channels are also disclosed.
摘要翻译：一种用于促进异步和同步基站之间切换的改进方法。一种用于确定由无线基站发送的导频信道的导频信道PN偏移的方法。在第一实施例中，该方法包括将PN序列与接收到的导频信号相关联以获取PN帧定时，接收与PN帧定时对准的至少一个搜索码突发，表示导频信道PN的至少一个搜索码突发偏移，并且将所述至少一个搜索码突发与一组码字进行比较，每个码字表示预定的PN偏移。从搜索码突发中，移动站能够快速地确定发射基站的PN偏移，从而识别它。还公开了用于发送互补的一组前向链路信道的方法。

93. 发明授权

US07315527B2 Extended acknowledgement and rate control channel 有权
标题翻译：扩展确认和速率控制通道
公开(公告)号：US07315527B2
公开(公告)日：2008-01-01
申请号：US10781285
申请日：2004-02-17
申请人： Yongbin Wei , Edward G. Tiedemann, Jr. , Peter Gaal , Durga P. Malladi , David Puig Oses , Sandip Sarkar , Stein Lundby , Tao Chen , Avinash Jain , Aleksandar Damnjanovic , Serge Willenegger
发明人： Yongbin Wei , Edward G. Tiedemann, Jr. , Peter Gaal , Durga P. Malladi , David Puig Oses , Sandip Sarkar , Stein Lundby , Tao Chen , Avinash Jain , Aleksandar Damnjanovic , Serge Willenegger
IPC分类号： H04Q7/24
CPC分类号： H04W28/22 , H04B7/264 , H04L1/0026 , H04L1/1671 , H04L1/1819 , H04W72/1289
摘要： Embodiments disclosed herein address the need in the art for an extended acknowledgment/rate control channel. In one aspect, an acknowledgment command and a rate control command are combined to form a combined command. In another aspect, the combined command is generated in accordance with a constellation of points, each point corresponding to a pair consisting of a rate control command and an acknowledgment command. In yet another aspect, the points of the constellation are designed to provide the desired probability of error for the respective command pairs. In yet another aspect, a common rate control command is transmitted along with a combined or dedicated rate control command. Various other aspects are also presented. These aspects have the benefit of reduced overhead while providing acknowledgment and rate control to single remote stations and/or groups of remote stations.
摘要翻译：本文公开的实施例解决了本领域对扩展确认/速率控制信道的需要。在一个方面，将确认命令和速率控制命令组合以形成组合命令。在另一方面，组合命令根据点的星座生成，每个点对应于由速率控制命令和确认命令组成的对。在另一方面，星座的点被设计成为各个命令对提供期望的误差概率。在另一方面，公共速率控制命令与组合或专用速率控制命令一起发送。还提出了各种其他方面。这些方面具有减少开销的优点，同时向单个远程站和/或远程站组提供确认和速率控制。

94. 发明授权

US07286846B2 Systems and methods for performing outer loop power control in wireless communication systems 有权
标题翻译：在无线通信系统中执行外环功率控制的系统和方法
公开(公告)号：US07286846B2
公开(公告)日：2007-10-23
申请号：US10652355
申请日：2003-08-29
申请人： Tao Chen , Stein Lundby , Sandip Sarkar , Yu-Cheun Jou
发明人： Tao Chen , Stein Lundby , Sandip Sarkar , Yu-Cheun Jou
IPC分类号： H04B7/00
CPC分类号： H04W52/38 , H04W52/44
摘要： Systems and methods for controlling the power level for a mobile station during periods when no data is being transmitted by the mobile station. In one embodiment, data is intermittently transmitted from a mobile station to a base station on a reverse-link traffic channel. When data is being transmitted on the traffic channel, the transmitted data is used by the base station to perform power control operations (e.g., incrementing or decrementing the mobile station's power level, based upon comparison of a received SNR to a target SNR). When no data is being transmitted on the traffic channel, a “zero-rate indicator” is transmitted on the rate indicator channel. The zero-rate indicator is used by the base station to perform power control. Power control based on the zero-rate indicator may use velocity profiles, reliability metrics or other techniques to control adjustment of the power level.
摘要翻译：在移动台没有发送数据的时段期间控制移动台的功率电平的系统和方法。在一个实施例中，数据在反向链路业务信道上从移动站间歇地发送到基站。当在业务信道上发送数据时，基站使用发送的数据来执行功率控制操作（例如，基于接收到的SNR与目标SNR的比较来增加或减少移动台的功率电平）。当业务信道上没有发送数据时，在速率指示符信道上发送“零速率指示符”。零速率指示器由基站用于执行功率控制。基于零速率指示器的功率控制可以使用速度曲线，可靠性度量或其他技术来控制功率水平的调节。

95. 发明申请

US20070111747A1 APPARATUS, SYSTEM, AND METHOD FOR MANAGING REVERSE LINK COMMUNICATION 有权
标题翻译：用于管理反向链路通信的装置，系统和方法
公开(公告)号：US20070111747A1
公开(公告)日：2007-05-17
申请号：US11621551
申请日：2007-01-09
申请人： Stein Lundby , Avinash Jain , Joseph Odenwalder , Sandip Sarkar , Tao Chen , Yongbin Wei
发明人： Stein Lundby , Avinash Jain , Joseph Odenwalder , Sandip Sarkar , Tao Chen , Yongbin Wei
IPC分类号： H04B7/00 , H04Q7/20
CPC分类号： H04W52/265 , H04W52/146 , H04W52/245 , H04W52/26 , H04W52/288 , H04W52/367
摘要： An apparatus, system, and method efficiently manage reverse link resources by allowing a mobile station to select between transmitting a payload at a standard power level and transmitting a smaller payload at a boosted power level. The mobile station, therefore, can autonomously select a QoS (Quality of Service) level for physical layer packets. Based on reverse link transmission information received from a base station, the mobile station derives a reverse link transmission guideline defining the power levels and associated payloads for at least a standard service and boosted service. The mobile station selects a reverse link transmission power level from a plurality of power levels including at least a standard reverse link transmission power level associated with a standard payload size and a boosted reverse link transmission power level associated with a boosted payload size where the standard payload size is greater than the boosted payload size.
摘要翻译：一种装置，系统和方法通过允许移动台在标准功率电平上发送有效载荷并以提升的功率电平发射较小的有效载荷之间进行选择来有效地管理反向链路资源。因此，移动台可以自主地选择物理层分组的QoS（服务质量）级别。基于从基站接收的反向链路传输信息，移动台导出定义用于至少标准服务和升级服务的功率电平和相关联的有效载荷的反向链路传输准则。移动台从包括至少与标准有效载荷大小相关联的标准反向链路发射功率电平的多个功率电平和与提升的有效载荷大小相关联的提升的反向链路发射功率电平来选择反向链路发射功率电平，其中标准有效载荷尺寸大于提升的有效载荷大小。

96. 发明授权

US07170996B1 Random number generation for encrypting cellular communications 有权
标题翻译：用于加密蜂窝通信的随机数生成
公开(公告)号：US07170996B1
公开(公告)日：2007-01-30
申请号：US09419968
申请日：1999-10-18
申请人： Sandip Sarkar
发明人： Sandip Sarkar
IPC分类号： H04L9/00 , H04K1/00
CPC分类号： G06F7/588 , H04L9/0662 , H04L2209/12 , H04L2209/805
摘要： In wireless communications, transmission devices require continuous supplies of random data for encryption processes. The invention provides a method for generating a continuos pool of truly random data with hardware that is already available in conventional CDMA phones.
摘要翻译：在无线通信中，传输设备需要连续提供用于加密过程的随机数据。本发明提供一种用于利用在常规CDMA电话中可用的硬件来产生真正随机数据的连续池的方法。

97. 发明授权

US06999430B2 Method and apparatus for transmitting data traffic on a wireless communication channel 有权
公开(公告)号：US06999430B2
公开(公告)日：2006-02-14
申请号：US09727925
申请日：2000-11-30
申请人： Jack M. Holtzman , Sandip Sarkar , Ahmed Saifuddin
发明人： Jack M. Holtzman , Sandip Sarkar , Ahmed Saifuddin
IPC分类号： H04L12/26 , H04L1/00 , H04J1/16 , G06F11/00 , G08C15/00
CPC分类号： H04L1/1819 , H04L1/0002 , H04L1/0009 , H04L1/1825 , H04L1/1845 , H04L1/1887 , H04W52/282
摘要： Methods and apparatus are presented for scheduling data packet transmissions during optimal channel conditions. In one method, data packet retransmissions are scheduled for transmission during favorable channel conditions when the target remote station is moving slowly, but are scheduled for periodic transmissions when the target is moving moderately or fast. In another method, long delays for retransmissions in a channel sensitive timing scheme are eliminated. In other methods, a combination of periodic and aperiodic retransmissions are used to achieve the desired frame error rate.

98. 发明授权

US06990091B2 Method and apparatus for fast WCDMA acquisition 有权
公开(公告)号：US06990091B2
公开(公告)日：2006-01-24
申请号：US10044192
申请日：2001-10-26
申请人： Sandip Sarkar
发明人： Sandip Sarkar
IPC分类号： H04B7/26
CPC分类号： H04B1/70752 , H04B1/70735 , H04B1/70755 , H04B1/708 , H04B1/7083 , H04B2201/70701 , H04B2201/70707
摘要： A method and apparatus for quickly acquiring synchronization of a signal in a WCDMA communication system utilizing variable duration sample accumulation, validity testing of decoder estimates, and parallel decoding of multiple synchronization signals within a PERCH channel. The receiver accumulates the samples necessary to reliably determine slot timing. Until slot timing estimates pass a validity test, samples are accumulated for frame timing estimates. Until frame timing estimates pass a validity test, samples are analyzed to determine the pilot offset of the channel.

99. 发明申请

US20050197150A1 Method and apparatus for adaptive power control in a wireless voice and data communication system 有权
标题翻译：无线语音和数据通信系统中自适应功率控制的方法和装置
公开(公告)号：US20050197150A1
公开(公告)日：2005-09-08
申请号：US11058059
申请日：2005-02-14
申请人： Sandip Sarkar , Yu-Cheun Jou
发明人： Sandip Sarkar , Yu-Cheun Jou
IPC分类号： H04B7/26 , G01S11/02 , G01S11/06 , G01S11/10 , G01S19/25 , H04B7/005 , H04Q7/20
CPC分类号： H04W52/282 , G01S11/02 , G01S11/06 , G01S11/10 , H04W52/08
摘要： A method and apparatus for adaptively controlling the power level of transmissions from a remote station by determining the velocity of the remote station. A general classification of the velocity of the remote station can be used to selectively implement a closed loop power control scheme. Power level parameters are used to determine velocity. In accordance with a classification of stationary, low speed, or high speed, the closed loop power control is selectively operated. Velocity can be determined by either the base station or the remote station through various methods. One method is the use of power control bits and/or average power to determine level crossings and excursion times.
摘要翻译：一种用于通过确定远程站的速度来自动控制来自远程站的传输的功率电平的方法和装置。可以使用远程站的速度的一般分类来选择性地实现闭环功率控制方案。功率等级参数用于确定速度。根据静止，低速或高速的分类，选择性地操作闭环功率控制。速度可以由基站或远程站通过各种方法来确定。一种方法是使用功率控制位和/或平均功率来确定电平交叉和偏移时间。

100. 发明申请

US20050124372A1 Apparatus, system, and method for managing reverse link communication 有权
标题翻译：用于管理反向链路通信的装置，系统和方法
公开(公告)号：US20050124372A1
公开(公告)日：2005-06-09
申请号：US10933727
申请日：2004-09-02
申请人： Stein Lundby , Avinash Jain , Joseph Odenwalder , Sandip Sarkar , Tao Chen , Yongbin Wei
发明人： Stein Lundby , Avinash Jain , Joseph Odenwalder , Sandip Sarkar , Tao Chen , Yongbin Wei
IPC分类号： H04B7/005 , H04B7/185 , H04W52/14 , H04W52/24 , H04W52/26 , H04W52/28 , H04W52/36
CPC分类号： H04W52/265 , H04W52/146 , H04W52/245 , H04W52/26 , H04W52/288 , H04W52/367
摘要： In accordance with an exemplary embodiment of the invention, an apparatus, system, and method efficiently manage reverse link resources by allowing a mobile station to select between transmitting a payload a standard power level and transmitting a smaller payload at a boosted power level. The mobile station, therefore, can autonomously select a QoS (Quality of Service) level for physical layer packets. Based on reverse link transmission information received from a base station, the mobile station derives a reverse link transmission guideline defining the power levels and associated payloads for at least a standard service and boosted service. The mobile station selects a reverse link transmission power level from a plurality of power levels including at least a standard reverse link transmission power level associated with a standard payload size and a boosted reverse link transmission power level associated with a boosted payload size where the standard payload size is greater than the boosted payload size.
摘要翻译：根据本发明的示例性实施例，一种装置，系统和方法通过允许移动台在提供标准功率电平的有效负载和在提升的功率电平下发送较小有效载荷之间进行选择来有效地管理反向链路资源。因此，移动台可以自主地选择物理层分组的QoS（服务质量）级别。基于从基站接收的反向链路传输信息，移动台导出定义用于至少标准服务和升级服务的功率电平和相关联的有效载荷的反向链路传输准则。移动台从包括至少与标准有效载荷大小相关联的标准反向链路发射功率电平的多个功率电平和与提升的有效载荷大小相关联的提升的反向链路发射功率电平来选择反向链路发射功率电平，其中标准有效载荷尺寸大于提升的有效载荷大小。

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