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    Method and apparatus for geolocation estimates in wireless networks
    1.
    发明授权
    Method and apparatus for geolocation estimates in wireless networks 有权
    无线网络中地理位置估计的方法和装置

    公开(公告)号：US07224983B2

    公开(公告)日：2007-05-29

    申请号：US10338222

    申请日：2003-01-08

    申请人： Kenneth C. Budka ,  Doru Calin ,  Tingfang Ji

    发明人： Kenneth C. Budka ,  Doru Calin ,  Tingfang Ji

    IPC分类号： H04Q7/20

    CPC分类号： H04W64/00

    摘要： A method and apparatus for increasing the accuracy and reliability of geolocation estimates for wireless communication networks devices includes calculating a geolocation estimate of a wireless communication device for a plurality of time periods, and selecting from the plurality of calculated geolocation estimates, a most reliable geolocation estimate of the wireless communication device.

    摘要翻译： 一种用于增加无线通信网络设备的地理位置估计的准确性和可靠性的方法和装置包括：计算多个时间段内的无线通信设备的地理位置估计，并从多个计算的地理位置估计中选择最可靠的地理位置估计 的无线通信设备。

    Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links
    2.
    发明授权
    Systems and methods for providing adaptive pulse position modulated code division multiple access for ultra-wideband communication links 有权
    为超宽带通信链路提供自适应脉冲位置调制码分多址的系统和方法

    公开(公告)号：US07187715B2

    公开(公告)日：2007-03-06

    申请号：US10252351

    申请日：2002-09-23

    申请人： Krishna Balachandran ,  Doru Calin ,  Tingfang Ji ,  Joseph H. Kang

    发明人： Krishna Balachandran ,  Doru Calin ,  Tingfang Ji ,  Joseph H. Kang

    IPC分类号： H04B14/04

    CPC分类号： H04B1/7176 ,  H04B2001/6908 ,  H04L25/4902

    摘要： An adaptive pulse position modulated CDMA scheme for use in UWB communications systems is disclosed. A stream of input bits is encoded with spreading code sequence. The spreading code sequence consists of a number of code elements that may have one of two values. Each bit is encoded into a symbol consisting of a predefined number of chips, which are transmitted during a symbol period. Next, at least one code element is associated with each chip in the symbol. Then, an encoded pulse is generated in each chip. Each encoded pulse has a value determined by multiplying the data bit with the code value associated with the particular chip. The encoded pulse is then pulse position modulated by shifting the position of the pulse to a first position or a second position within the chip depending upon the encoded value of the pulse.

    摘要翻译： 公开了一种用于UWB通信系统的自适应脉冲位置调制CDMA方案。 输入比特流用扩展码序列编码。 扩展码序列由可能具有两个值之一的多个代码元素组成。 每个位被编码成由符号周期内发送的预定数量的芯片组成的符号。 接下来，至少一个代码元素与符号中的每个芯片相关联。 然后，在每个芯片中产生编码脉冲。 每个编码脉冲具有通过将数据位与与特定芯片相关联的代码值相乘确定的值。 然后根据脉冲的编码值，将脉冲的位置移位到芯片内的第一位置或第二位置，从而进行脉冲位置调制。

    Variable spacing pulse position modulation for ultra-wideband communication links
    3.
    发明授权
    Variable spacing pulse position modulation for ultra-wideband communication links 有权
    用于超宽带通信链路的可变间隔脉冲位置调制

    公开(公告)号：US07082153B2

    公开(公告)日：2006-07-25

    申请号：US10251954

    申请日：2002-09-23

    申请人： Krishna Balachandran ,  Doru Calin ,  Tingfang Ji ,  Joseph H. Kang

    发明人： Krishna Balachandran ,  Doru Calin ,  Tingfang Ji ,  Joseph H. Kang

    IPC分类号： H04B1/69 ,  H04B7/212 ,  H03K7/04

    CPC分类号： H04B1/7176 ,  H04B2001/6908 ,  H04L25/4902

    摘要： Methods and systems for generating a variable spacing pulse position modulated (VSPPM) signal for transmission across an ultra-wideband communications channel. The variable pulse position modulated spread spectrum signal is created by encoding every M input data bits from an input data stream into a symbol consisting of Nc chips. Each chip is divided into 2M sub-chips and each sub-chip is further divided into Np time slots. A pulse is transmitted for each chip in the symbol. During each chip period, the pulse is placed in the sub-chip corresponding to the binary M-tuple (or symbol) value. A time hopping code sequence consisting of Nc elements with a one-to-one chip association is then applied to each symbol so that the position of each pulse is shifted to the appropriate time slot that corresponds to the time hopping code value.

    摘要翻译： 用于生成用于跨超宽带通信信道传输的可变间隔脉冲位置调制（VSPPM）信号的方法和系统。 可变脉冲位置调制扩频信号是通过将每输入数据流中每M个输入数据位编码成由N个芯片组成的符号来产生的。 每个芯片被分成2个M个子芯片，并且每个子芯片被进一步分成N个时隙。 为符号中的每个芯片发送一个脉冲。 在每个码片周期期间，脉冲被放置在对应于二进制M元组（或符号）值的子芯片中。 然后将由具有一对一芯片关联的N＆lt; c＆gt;元素组成的跳时码序列应用于每个符号，使得每个脉冲的位置被转移到对应于 跳码代码。

    Recovery from resource mismatch in a wireless communication system
    8.
    发明授权
    Recovery from resource mismatch in a wireless communication system 有权
    从无线通信系统中的资源不匹配恢复

    公开(公告)号：US09420603B2

    公开(公告)日：2016-08-16

    申请号：US11849646

    申请日：2007-09-04

    申请人： Tingfang Ji ,  Mohammad Jaber Borran ,  Alexei Gorokhov ,  Aamod Khandekar

    发明人： Tingfang Ji ,  Mohammad Jaber Borran ,  Alexei Gorokhov ,  Aamod Khandekar

    IPC分类号： H04W72/12

    CPC分类号： H04W72/1252

    摘要： System(s) and method(s) that facilitate assignment mismatch recovery are provided. A projected level of resources required to satisfy one or more communication constraints (e.g., inter-cell and intra-cell interference) is generated. The projected resources are contrasted with scheduled resources and a determination is made as to whether a mismatch between assigned and projected resources exists. A mismatch is recovered through an adaptive response that feeds back magnitudes for the communication resources which are compatible with the communication constraints.

    摘要翻译： 提供了有助于分配失配恢复的系统和方法。 产生满足一个或多个通信约束（例如，小区间和小区内干扰）所需的预计资源量。 预计资源与预定的资源形成对照，并确定是否存在分配和预计资源之间的不匹配。 通过自适应响应恢复不匹配，该自适应响应反馈与通信约束兼容的通信资源的幅度。

    Method and apparatus for relay backhaul design in a wireless communication system
    9.
    发明授权
    Method and apparatus for relay backhaul design in a wireless communication system 有权
    无线通信系统中的中继回程设计方法及装置

    公开(公告)号：US09210622B2

    公开(公告)日：2015-12-08

    申请号：US12853872

    申请日：2010-08-10

    申请人： Tingfang Ji ,  Wanshi Chen ,  Dexu Lin

    发明人： Tingfang Ji ,  Wanshi Chen ,  Dexu Lin

    IPC分类号： H04W88/04 ,  H04W16/26 ,  H04B7/155 ,  H04W36/00 ,  H04W36/08 ,  H04W72/00

    CPC分类号： H04W36/0033 ,  H04W36/08 ,  H04W72/00 ,  H04W88/04

    摘要： Systems and methodologies are described herein that facilitate techniques for design of relay backhaul to support mobility of relay nodes in a wireless communication system. According to various aspects herein, techniques are provided to enable and support the use of mobile relays and to facilitate handover of mobile relays between respective donor cells. More particularly, techniques are provided herein for relay backhaul control channel assignment associated with hand in or hand out of mobile relays, access/backhaul resource partitioning for mobile relays, and management of quality of service (QoS) requirements associated with a relay handover.

    摘要翻译： 这里描述了促进用于设计中继回程以支持无线通信系统中的中继节点的移动性的技术的系统和方法。 根据本文的各个方面，提供了技术来实现和支持移动中继的使用并且便于各个供体小区之间的移动中继的切换。 更具体地，本文提供了用于与移动中继站的手或移出相关联的中继回程控制信道分配的技术，用于移动中继的接入/回程资源划分以及与中继切换相关联的服务质量（QoS）要求的管理。

    Segment sensitive scheduling
    10.
    发明授权
    Segment sensitive scheduling 有权
    分段敏感调度

    公开(公告)号：US09209956B2

    公开(公告)日：2015-12-08

    申请号：US11260924

    申请日：2005-10-27

    申请人： Alexei Gorokhov ,  Tingfang Ji

    发明人： Alexei Gorokhov ,  Tingfang Ji

    IPC分类号： H04J1/00 ,  H04L5/00 ,  H04L5/14 ,  H04L1/00 ,  H04L1/18 ,  H04L25/03

    CPC分类号： H04L5/006 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/1812 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/0064 ,  H04L5/1438 ,  H04L25/0398

    摘要： Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.

    摘要翻译： 在OFDMA系统中调度子载波的系统和方法，其中调度器考虑通信设备经历的信道条件以优化信道状况。 调度器可以将跨越工作带宽的一组子载波划分成多个段。 这些段可以包括多个全局段，每个全局段包括基本上跨整个工作带宽的子载波的不同的非连续子集。 一个或多个全局段可被进一步分割成多个本地段，每个本地段具有小于信道相干带宽的带宽。 调度器通过报告或信道估计来确定每个通信设备经历的信道特征，并根据信道特性为每个设备的通信链路分配一个或多个分段。