公开(公告)号：US07139237B2

公开(公告)日：2006-11-21

申请号：US09961516

申请日：2001-09-24

申请人： Vijay Nangia ,  Kevin Lynn Baum ,  Karthik Ramasubramanian

发明人： Vijay Nangia ,  Kevin Lynn Baum ,  Karthik Ramasubramanian

IPC分类号： H04J13/02

CPC分类号： H04J13/004 ,  H04B2201/70703 ,  H04J13/18 ,  H04L5/023

摘要： A multi-rate interleaved frequency division multiple access (IFDMA) modulation scheme permits users to transmit at different data rates or to vary their data rates while providing frequency diversity and preserving low peak-to-average power ratios and orthogonality between users at different data rates. The modulation scheme allows user-specific data block and repetition sizes, as well as user-specific modulation codes. Code assignment rules are provided for maintaining orthogonality between users having different data rates. Block and phase ramp modulation codes can be used. Asynchronous transmissions by users are supported by ensuring that the length of the cyclic extension is sufficiently long to tolerate worst case relative signal arrival delays between users and the channel pulse response duration over the communication medium. The modulation scheme can be employed in wireless communication systems, such as cellular or paging systems.

公开(公告)号：US07035364B2

公开(公告)日：2006-04-25

申请号：US09896703

申请日：2001-06-29

申请人： Sumit A. Talwalkar ,  Vijay Nangia ,  Leng H. Ooi

发明人： Sumit A. Talwalkar ,  Vijay Nangia ,  Leng H. Ooi

IPC分类号： H04L7/00

CPC分类号： H04L27/0014 ,  H04L7/0004 ,  H04L7/04 ,  H04L2027/0036

摘要： A digital receiver fast frequency and time acquisition system (200) for accurately providing both time and frequency synchronization to an incoming data stream with minimal delay to prevent any loss of incoming digital information. The invention provides synchronization with only a single synchronization word and includes a first channel select (CS) filter (204) that filters an incoming digital signal (202). A frame synchronization detector (206) then recognizes the time synchronization word from the first filtered signal. A coarse symbol time estimator (208) is then used for coarsely adjusting the time synchronization of the digital signal from the frame synchronization detector (206) and a fine frequency estimator (210) finely adjusts the frequency of the signal from the coarse symbol time estimator (208) for providing a frequency adjusted signal. A mixer (212) then combines the incoming digital signal with the frequency adjusted signal and provides a time and frequency compensated digital signal. A second CS filter (214) filters the frequency compensated digital signal and a fine symbol time estimator (216) works to determine symbol timing with greater precision. Finally, a symbol detector (218) is used for interpreting the incoming digital signal.

摘要翻译： 一种数字接收机快速频率和时间采集系统（200），用于以最小的延迟精确地提供输入数据流的时间和频率同步，以防止输入数字信息的任何丢失。 本发明仅提供与单个同步字的同步，并且包括对输入数字信号（202）进行过滤的第一信道选择（CS）滤波器（204）。 帧同步检测器（206）然后从第一滤波信号识别时间同步字。 然后，粗略的符号时间估计器（208）用于粗略地调整来自帧同步检测器（206）的数字信号的时间同步，并且精细频率估计器（210）精细地调整来自粗略符号时间估计器的信号的频率 （208），用于提供频率调整信号。 混频器（212）然后将输入的数字信号与频率调整信号组合，并提供时间和频率补偿的数字信号。 第二CS滤波器（214）对频率补偿的数字信号进行滤波，精细符号时间估计器（216）用于以更高精度确定符号定时。 最后，符号检测器（218）用于解释输入的数字信号。

公开(公告)号：US06999467B2

公开(公告)日：2006-02-14

申请号：US10628680

申请日：2003-07-28

申请人： Thomas P. Krauss ,  Kevin L. Baum ,  Vijay Nangia

发明人： Thomas P. Krauss ,  Kevin L. Baum ,  Vijay Nangia

IPC分类号： H04B7/216 ,  H04J11/00

CPC分类号： H04L5/0021 ,  H04L5/0048 ,  H04L25/0202

摘要： A staggered spread OFCDM scheme is utilized that improves channel estimation. In a first embodiment, each chip stream is time shifted by a predetermined amount and then transmitted on a predetermined subcarrier. This results in time-spread symbols being staggered (time-offset) on different subcarriers allowing for more frequent sampling of the channel. In a second embodiment a staggered spreading approach is applied in the frequency dimension to improve the performance of a system with spreading in the frequency dimension.

摘要翻译： 利用交错的扩展OFCDM方案来改进信道估计。 在第一实施例中，每个芯片流被时移一预定量，然后在预定的子载波上传输。 这导致时间扩展符号在不同子载波上交错（时间偏移），允许更频繁地对信道进行采样。 在第二实施例中，在频率维度中应用交错扩展方法以改善在频率维度上扩展的系统的性能。

公开(公告)号：US06801754B2

公开(公告)日：2004-10-05

申请号：US09781212

申请日：2002-02-13

申请人： Sumit A. Talwalkar ,  Vijay Nangia ,  Leng H. Ooi

发明人： Sumit A. Talwalkar ,  Vijay Nangia ,  Leng H. Ooi

IPC分类号： H04B138

CPC分类号： H04B7/155 ,  H04W28/18 ,  H04W76/00 ,  H04W76/10 ,  H04W88/04

摘要： A system and method are disclosed to provide increased signaling in a communications system. A repeater system is operable to receive and store operating characteristic data from a communications unit, the repeater transmitting at least some of the stored operating characteristic data during a detected break in transmission.

摘要翻译： 公开了一种在通信系统中提供增加的信令的系统和方法。 中继器系统可操作以从通信单元接收和存储操作特征数据，所述中继器在传输期间检测到中断期间发送所存储的操作特征数据中的至少一些。

公开(公告)号：US10123345B2

公开(公告)日：2018-11-06

申请号：US12976117

申请日：2010-12-22

申请人： Murali Narasimha ,  Vijay Nangia ,  Colin D. Frank ,  Hyejung Jung

发明人： Murali Narasimha ,  Vijay Nangia ,  Colin D. Frank ,  Hyejung Jung

IPC分类号： H04W72/12 ,  H04L1/18 ,  H04W24/10 ,  H04W88/06 ,  H04L1/00

摘要： A wireless terminal that supports operation on a first wireless technology and operation on a second wireless technology performs a first set of measurements on a received signal on first operating frequency of the first wireless technology, wherein the first set of measurements are performed during time periods that overlap time periods during which the wireless terminal transmits signals of the second wireless technology. The terminal also performs interference avoidance to avoid interference from transmissions of signals of the second wireless technology to reception of signals of the first wireless technology if the first set of measurements indicates interference due to transmission of signals of the second wireless technology by the wireless terminal.

公开(公告)号：US09370021B2

公开(公告)日：2016-06-14

申请号：US12184235

申请日：2008-07-31

申请人： Robert T. Love ,  Edgar P. Fernandes ,  Vijay Nangia ,  Dale G. Schwent ,  Kenneth A. Stewart ,  David R. Wilson

发明人： Robert T. Love ,  Edgar P. Fernandes ,  Vijay Nangia ,  Dale G. Schwent ,  Kenneth A. Stewart ,  David R. Wilson

IPC分类号： H04W4/00 ,  H04W74/00 ,  H04L5/00 ,  H04W72/00 ,  H04W16/14

CPC分类号： H04W74/006 ,  H04L5/0041 ,  H04L5/0042 ,  H04L5/0066 ,  H04L5/0092 ,  H04W16/14

摘要： A wireless communication user terminal includes a controller communicably coupled to a transceiver. The controller is configured to tune the transceiver to transmit on a narrowband uplink control channel within a wideband frequency resource. The uplink control channel includes a pair of uplink control channels separated within the wideband frequency resource wherein the pair of uplink control channels are each located within a corresponding PUCCH resource region. The controller is also configured to change a frequency location of at least one of the uplink control channels, within the corresponding PUCCH resource region, away from an edge of the wideband frequency resource.

摘要翻译： 无线通信用户终端包括可通信地耦合到收发机的控制器。 控制器被配置为调谐收发器以在宽带频率资源内的窄带上行链路控制信道上进行发送。 上行链路控制信道包括在宽带频率资源中分离的一对上行链路控制信道，其中该对上行链路控制信道各自位于相应的PUCCH资源区域内。 控制器还被配置为将相应的PUCCH资源区域内的至少一个上行链路控制信道的频率位置改变为远离宽带频率资源的边缘。

公开(公告)号：US09344259B2

公开(公告)日：2016-05-17

申请号：US12435145

申请日：2009-05-04

申请人： Robert Tristan Love ,  Jialing Liu ,  Vijay Nangia ,  Ravikiran Nory

发明人： Robert Tristan Love ,  Jialing Liu ,  Vijay Nangia ,  Ravikiran Nory

IPC分类号： H04W4/00 ,  H04L5/00

CPC分类号： H04L5/0091 ,  H04L5/003

摘要： There is provided a communication device and a base unit, and methods thereof, for determining control information. The communication device receives a control channel message associated with the communication device in a control region on a first carrier from a base unit. The communication device also determines a set of resources in a search space within the control region, attempts to decode the set of resources in the search space for the control channel message, and determines control information from the decoded control channel message. The base unit generates a control channel message comprising control information associated with the communication device, determines a set of resources in a search space within a control region, selects a subset of resources within the determined set of resources for transmitting the control channel message, and transmits the control channel message on the selected resources in the control region on a first carrier.

摘要翻译： 提供了一种用于确定控制信息的通信设备和基本单元及其方法。 通信设备从基本单元在第一载波上的控制区域中接收与通信设备相关联的控制信道消息。 通信设备还确定控制区域内的搜索空间中的一组资源，尝试对控制信道消息的搜索空间中的资源集合进行解码，并且从解码的控制信道消息中确定控制信息。 基本单元产生包括与通信设备相关联的控制信息的控制信道消息，确定控制区域内的搜索空间中的一组资源，选择用于发送控制信道消息的确定的资源集合内的资源子集，以及 在第一载波上的控制区域中的所选择的资源上发送控制信道消息。

公开(公告)号：US08934417B2

公开(公告)日：2015-01-13

申请号：US12405046

申请日：2009-03-16

申请人： Ravikiran Nory ,  Ravi Kuchibhotla ,  Robert T. Love ,  Vijay Nangia ,  Ajit Nimbalker ,  Kenneth A. Stewart ,  Xiangyang Zhuang

发明人： Ravikiran Nory ,  Ravi Kuchibhotla ,  Robert T. Love ,  Vijay Nangia ,  Ajit Nimbalker ,  Kenneth A. Stewart ,  Xiangyang Zhuang

IPC分类号： H04W4/00 ,  H04J3/00 ,  H04W72/12 ,  H04W72/04

CPC分类号： H04W72/1289 ,  H04W72/042

摘要： A wireless communication terminal including a controller coupled to a transceiver, configured to receive a first and second control messages on an anchor carrier is disclosed. The first control message includes a resource assignment for the anchor carrier and the second control message is associated with a set of component carriers that are distinct from the anchor carrier. The controller determines a resource assignment for at least one component carrier in the set of component carriers using both the first and the second control messages.

摘要翻译： 公开了一种无线通信终端，包括耦合到收发器的控制器，被配置为在锚定载波上接收第一和第二控制消息。 第一控制消息包括用于锚定载波的资源分配，并且第二控制消息与不同于锚定载波的一组分量载波相关联。 控制器使用第一和第二控制消息来确定分组载波集合中的至少一个分量载波的资源分配。