公开(公告)号：US20110235746A1

公开(公告)日：2011-09-29

申请号：US13158207

申请日：2011-06-10

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04L27/00

CPC classification number: H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

Abstract: A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US07778643B2

公开(公告)日：2010-08-17

申请号：US10636482

申请日：2003-08-07

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04W40/00

CPC classification number: H04W16/12 ,  H04W16/14 ,  H04W24/00 ,  H04W36/06 ,  H04W52/0235 ,  H04W52/028 ,  H04W52/08 ,  H04W52/281 ,  H04W52/283 ,  H04W52/286 ,  H04W52/287 ,  H04W52/288 ,  H04W52/60 ,  H04W68/02 ,  H04W68/025 ,  H04W72/00 ,  H04W72/0413 ,  H04W72/048 ,  Y02D70/23

Abstract: The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. The various states require different amounts of communications resources, e.g., bandwidth. Four supported states of operation are an on-state, a hold-state, a sleep-state, and an access-state. Each mobile node in the on-state is allocated communication resources to perform transmission power control signaling, transmission timing control signaling and to transmit data as part of a data uplink communications operation. Each mobile node in the hold-state is allocated communication resources to perform transmission timing control signaling and is provided a dedicated uplink for requesting a state transition and a shared resource for transmitting acknowledgements. In the sleep state a mobile node is allocated minimal resources and does not conduct power control signaling or timing control signaling. Data may be received in the on and hold states.

Abstract translation: 描述了使用移动通信设备操作的多种状态来允许单个基站支持相对大量的移动节点。 各种状态需要不同数量的通信资源，例如带宽。 四个支持的操作状态是开状态，保持状态，睡眠状态和访问状态。 处于导通状态的每个移动节点被分配通信资源以执行传输功率控制信令，传输定时控制信令，并且作为数据上行链路通信操作的一部分来发送数据。 保持状态下的每个移动节点被分配通信资源以执行传输定时控制信令，并且提供用于请求状态转换的专用上行链路和用于发送确认的共享资源。 在睡眠状态下，移动节点被分配最少资源，并且不进行功率控制信令或定时控制信令。 可以在接通和保持状态下接收数据。

公开(公告)号：US20090296837A1

公开(公告)日：2009-12-03

申请号：US12429927

申请日：2009-04-24

Applicant: RAJIV LAROIA ,  JUNYI LI ,  SATHYADEV VENKATA UPPALA

Inventor： RAJIV LAROIA ,  JUNYI LI ,  SATHYADEV VENKATA UPPALA

IPC: H04L27/28

CPC classification number: H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

Abstract: A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

Abstract translation: 提供了一种用于降低OFDM通信信号中的峰均比的方法。 该方法包括定义具有多个符号的星座，定义OFDM通信信号的符号持续时间，以及定义符号持续时间中的多个时刻。 将多个音调分配给特定的通信设备，并且通过将符号从星座映射到时刻在时域中构建离散信号。 通过对离散信号应用内插函数来生成连续信号，使得连续信号仅包括具有等于所分配音调的频率的正弦曲线。

公开(公告)号：US20090201795A1

公开(公告)日：2009-08-13

申请号：US12429896

申请日：2009-04-24

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04J11/00

CPC classification number: H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

Abstract: A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US07406058B2

公开(公告)日：2008-07-29

申请号：US10640973

申请日：2003-08-13

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04Q7/00

CPC classification number: H04W72/0446 ,  H04W28/06 ,  H04W52/0216 ,  H04W52/0219 ,  H04W72/0406 ,  H04W72/082 ,  Y02D70/00

Abstract: The invention describes methods and apparatus to structure the air link resources, e.g. traffic channel, into segments of different transmission segment types and effectively use that novel structure. Different segment types are structured to achieve different performance characteristics. The segments may be aligned with different offsetting start times chosen to minimize the variation in the maximum number of segments starting at any given time slot. This staggering of segment start times minimizes waste in unused assignment messages due to structural inefficiencies, and has an overall effect of balancing the traffic. Information collected on the channel quality that various user's are experiencing may be used to classify the users. Stored information on different segment types, each with different benefits, is used in the allocation process to effectively match classified users to well-suited segment types to increase performance, balance the system, conserve power, and satisfy the users.

Abstract translation: 本发明描述了用于构造空中链路资源的方法和装置，例如， 交通信道，分为不同传输段类型的分段，有效地利用了这种新颖的结构。 不同的分段类型被组织以实现不同的性能特征。 这些段可以与所选择的不同的偏移起始时间对准，以使从任何给定时隙开始的段的最大数量的变化最小化。 由于结构性低效率，片段启动时间的这种惊人的最小化使未使用的分配消息中的浪费最小化，并且具有平衡流量的整体效果。 关于各种用户正在经历的信道质量收集的信息可以用于对用户进行分类。 在分配过程中使用不同分段类型的存储信息，每种类型具有不同的优势，以有效地将分类用户与适合的分段类型相匹配，以提高性能，平衡系统，节约功能并满足用户需求。

公开(公告)号：US07376172B2

公开(公告)日：2008-05-20

申请号：US11178909

申请日：2005-07-11

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04B1/713

CPC classification number: H04B1/7143 ,  H04B1/7156 ,  H04B2001/71563 ,  H04L5/0019 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613

Abstract: Base station identification and downlink synchronization are realized by employing pilots including known symbols transmitted at prescribed frequency tones in individual ones of prescribed time intervals. Specifically, the symbols used in the pilots are uniquely located in a time-frequency grid, where the locations are specified by periodic pilot tone hopping sequences. In a specific embodiment of the invention, a period of a pilot tone hopping sequence is constructed by starting with a Latin-square based hopping sequence, truncating it over time, and possibly offsetting and permuting it over frequency. Particular examples of pilot tone hopping sequences are parallel slope hopping sequences in which the periodicity of the sequences is chosen to be a prime number of symbol time intervals. In another embodiment of the invention, a notion of phantom pilots is employed to facilitate use of various system parameters while accommodating the above noted pilot tone hopping sequences.

Abstract translation: 基站识别和下行同步通过采用包括以规定时间间隔的各个规定频率发送的已知符号的导频来实现。 具体地，在导频中使用的符号唯一地位于时间 - 频率网格中，其中，位置由周期性导频音跳频序列指定。 在本发明的具体实施例中，通过以拉丁方为基础的跳频序列开始构建导频音跳频序列的周期，并且随着时间的推移将其截断，并可能通过频率进行偏移和置换。 导频音跳频序列的具体示例是平行斜率跳频序列，其中序列的周期性被选择为码元时间间隔的素数。 在本发明的另一个实施例中，使用幻像导频的概念来促进各种系统参数的使用，同时容纳上述导频音跳频序列。

公开(公告)号：US07363039B2

公开(公告)日：2008-04-22

申请号：US10636516

申请日：2003-08-07

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04Q7/20

CPC classification number: H04W36/20 ,  H04W16/12 ,  H04W16/14 ,  H04W24/00 ,  H04W36/06 ,  H04W52/0235 ,  H04W52/08 ,  H04W52/281 ,  H04W52/283 ,  H04W52/286 ,  H04W52/287 ,  H04W52/288 ,  H04W52/60 ,  H04W56/00 ,  H04W68/02 ,  H04W68/025 ,  H04W72/00 ,  H04W72/048 ,  Y02D70/00

Abstract: In many cellular systems, reusing spectrum bandwidth, creates problems in boundary regions between the cells and sectors where the signal strength received from adjacent base stations or adjacent sector transmissions of a single base station may be nearly equivalent. The invention creates a new type of diversity, referred to as multiple carrier diversity by utilizing multiple carriers, assigning different power levels to each carrier frequency at each base station, and/or offsetting sector antennas. The cell and/or sector coverage areas can be set so as to minimize or eliminate overlap between cell and/or sector boundary regions of different carrier frequencies. Mobile nodes traveling throughout the system can exploit multiple carrier diversity by detecting carriers and selecting to use a non-boundary carrier based on other system criteria in order to improve performance. Boundary carriers may, but need not be, identified and excluded from consideration for use by a wireless terminal.

Abstract translation: 在许多蜂窝系统中，重用频谱带宽在小区和扇区之间的边界区域中产生问题，其中从相邻基站接收的信号强度或单个基站的相邻扇区传输可能几乎相等。 本发明通过利用多个载波，在每个基站上为每个载波频率分配不同的功率电平和/或补偿扇区天线来创建一种称为多载波分集的新型分集。 可以设置小区和/或扇区覆盖区域以便最小化或消除不同载波频率的小区和/或扇区边界区域之间的重叠。 在整个系统中传播的移动节点可以通过检测载波并且基于其他系统标准选择使用非边界载波来利用多载波分集，以便提高性能。 边界运营商可以但不需要被识别并排除在考虑无线终端的使用之外。

公开(公告)号：US20080014920A1

公开(公告)日：2008-01-17

申请号：US11486809

申请日：2006-07-14

Applicant: Sathyadev Venkata Uppala ,  Murari Srinivasan ,  Pablo Anigstein ,  Rakesh Dugad ,  Rajiv Laroia ,  Junyi Li

Inventor： Sathyadev Venkata Uppala ,  Murari Srinivasan ,  Pablo Anigstein ,  Rakesh Dugad ,  Rajiv Laroia ,  Junyi Li

IPC: H04Q7/20

CPC classification number: H04W52/0216 ,  Y02D70/00

Abstract: Systems and methodologies are described that facilitate transitioning between states associated with a wireless terminal. The wireless terminal may transition to and/or from a split-tone on state, which may enable increasing overall user capacity related to a base station or sector. Further, such state transitions may reduce power consumption associated with the wireless terminal.

Abstract translation: 描述了促进与无线终端相关联的状态之间的转换的系统和方法。 无线终端可以转换到和/或从分离音开启状态，这可以使得增加与基站或扇区相关的总体用户容量。 此外，这种状态转换可以减少与无线终端相关联的功耗。

公开(公告)号：US20070242765A1

公开(公告)日：2007-10-18

申请号：US11486881

申请日：2006-07-14

Applicant: Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04K1/10

CPC classification number: H04L27/2613 ,  H04L5/023 ,  H04L27/2614 ,  H04L27/2655

Abstract: A composite signal includes a high power beacon signal and low power corresponding wideband synchronization signal and is communicated over a time interval exceeding a single OFDM transmission time interval. A base station transmits one or more different such composite broadcast signals in a recurring timing structure. Each different potential beacon signal, e.g., a single tone signal, is paired with a unique wideband synchronization signal. A wideband synchronization signal includes at least some predetermined null tones and at least some predetermined non-null tones. For a given wideband synchronization signal, the predetermined null tones carry predetermined modulation symbol values, A wireless terminal receives a composite signal, identifies a beacon, determines a corresponding known wideband synchronization signal, compares received to known wideband synchronization signals, and determines at least one of a timing adjustment, frequency adjustment and channel estimation.

Abstract translation: 复合信号包括高功率信标信号和低功率对应的宽带同步信号，并且在超过单个OFDM传输时间间隔的时间间隔上传送。 基站以循环定时结构发送一个或多个不同的这种复合广播信号。 每个不同的潜在信标信号，例如单个音调信号，与唯一的宽带同步信号配对。 宽带同步信号至少包括一些预定的无效音调和至少一些预定的非空音调。 对于给定的宽带同步信号，预定的空音携带预定的调制符号值，A无线终端接收复合信号，识别信标，确定对应的已知宽带同步信号，将已接收的已知宽带同步信号进行比较，并确定至少一个 定时调整，频率调整和信道估计。

公开(公告)号：US20070242764A1

公开(公告)日：2007-10-18

申请号：US11486609

申请日：2006-07-14

Applicant: Pablo Anigstein ,  Prashanth Hande ,  Junyi Li ,  Rajiv Laroia ,  Sathyadev Venkata Uppala

Inventor： Pablo Anigstein ,  Prashanth Hande ,  Junyi Li ,  Rajiv Laroia ,  Sathyadev Venkata Uppala

IPC: H04K1/10

CPC classification number: H04L27/2602 ,  H04L5/0007 ,  H04L27/2655

Abstract: User specific modulation-symbol scrambling is implemented for various uplink segments, e.g., uplink traffic acknowledgement channel (ULTACH), uplink state request channel (ULSRCH), and uplink dedicated control channel (ULDCCH) segments. A wireless terminal is assigned a wireless terminal scrambling identifier. A set of ordered input modulation symbols are determined for an uplink dedicated segment to which user specific scrambling is to be applied. One bit of the assigned wireless terminal scrambling identifier is associated with each of the ordered input modulation symbols of a segment in accordance with a predetermined mapping. For each input modulation symbol a scrambling operation, e.g., a phase rotation of the input modulation symbol, is performed as a function of the associated user specific scrambling identifier bit to obtain a corresponding output modulation symbol. A value of (0,1) for a scrambling ID bit is associated with a (first, second) amount of phase rotation, e.g., (0, 180) degrees, respectively.

Abstract translation: 针对各种上行链路段（例如，上行链路业务确认信道（ULTACH），上行链路状态请求信道（ULSRCH）和上行链路专用控制信道（ULDCCH））段实现用户特定的调制符号加扰。 无线终端被分配无线终端扰乱标识符。 针对要应用用户特定加扰的上行链路专用段确定一组有序输入调制符号。 所分配的无线终端扰乱标识符的一个比特根据预定的映射与段的每个有序输入调制符号相关联。 对于每个输入调制符号，作为输入调制符号的相位旋转的加扰操作被执行为相关联的用户特定加扰标识符位的函数，以获得相应的输出调制符号。 加扰ID位的（0,1）的值分别与（第一，第二）相位旋转量相关联，例如（0,180）度。