公开(公告)号：US08494615B2

公开(公告)日：2013-07-23

申请号：US13072903

申请日：2011-03-28

申请人： Raviv Melamed ,  Naftali Chayat

发明人： Raviv Melamed ,  Naftali Chayat

IPC分类号： A61B5/05

CPC分类号： A61B8/08 ,  A61B5/0507 ,  A61B5/7425 ,  A61B8/488 ,  G01S13/52 ,  G01S13/88 ,  G06T5/50 ,  G06T2207/30048

摘要： A method and apparatus for enhanced microwave imaging of an object collects microwave responses for multiple combinations of transmit antennas, receive antennas, and object movement states. The responses are grouped into sets of responses corresponding to at least two object movement states. An image is reconstructed from the set of responses for each movement state, and a differential image representative of object movement is generated from the reconstructed image for each of the at least two object movement states. The differential image is overlaid on a reconstructed image to obtain an enhanced composite image of the object.

摘要翻译： 用于增强物体的微波成像的方法和装置针对发射天线，接收天线和物体移动状态的多个组合收集微波响应。 响应被分组成对应于至少两个对象移动状态的响应集合。 从针对每个移动状态的响应集合重建图像，并且针对所述至少两个对象移动状态中的每一个，从重建图像生成代表对象移动的差分图像。 将差分图像重叠在重建图像上以获得对象的增强的合成图像。

公开(公告)号：US08805373B2

公开(公告)日：2014-08-12

申请号：US12942162

申请日：2010-11-09

申请人： Naftali Chayat

发明人： Naftali Chayat

IPC分类号： H04W36/00 ,  H04W4/00 ,  H04B7/208

CPC分类号： H04W72/0493 ,  H04W16/12 ,  H04W36/0072

摘要： A wireless communications system is described, which comprises a plurality of base stations and a plurality of subscriber devices. Each of the base stations comprises at least one antenna for communicating with respective subscriber devices currently located within a geographical area of a wireless cell served by a respective base station, and wherein: the geographical area of the wireless cell comprises a geographical central area and a geographical edge area; more than a third of all transmission resources available to the serving base station are available for communicating with the subscriber devices located within the geographical edge area of the wireless cell; and at least one of the transmission resources available for communicating with each of the subscriber devices currently located within the geographical edge area of the wireless cell is other than any of the transmission resources available for communicating with subscriber devices currently located within geographical edge areas of wireless cells each having a geographical edge area that is geographically adjacent to the geographical edge area of the wireless cell at which the subscriber device is located.

摘要翻译： 描述了一种无线通信系统，其包括多个基站和多个用户设备。 每个基站包括至少一个天线，用于与当前位于相应基站所服务的无线小区的地理区域内的各个用户装置进行通信，并且其中：无线小区的地理区域包括地理中心区域和 地理边缘地区; 可用于服务基站的所有传输资源的三分之一可用于与位于无线小区的地理边缘区域内的用户设备进行通信; 并且可用于与当前位于无线小区的地理边缘区域内的每个用户设备进行通信的传输资源中的至少一个不同于可用于与当前位于无线小区的地理边缘区域内的用户设备进行通信的任何传输资源 每个单元具有与用户设备所位于的无线小区的地理边缘区域地理上相邻的地理边缘区域。

公开(公告)号：US08483204B2

公开(公告)日：2013-07-09

申请号：US12987811

申请日：2011-01-10

申请人： Naftali Chayat ,  Ze'ev Roth ,  Vladimir Yanover ,  Mark Altshuller ,  Oleg Marinchenco

发明人： Naftali Chayat ,  Ze'ev Roth ,  Vladimir Yanover ,  Mark Altshuller ,  Oleg Marinchenco

IPC分类号： H04J3/06

CPC分类号： H04B7/155

摘要： A Relay Station (RS) is provided. The RS is adapted to operate in a TDD type of wireless communication network which comprises at least one base station (BS) operative to communicate with the RS and with an IP network, and a plurality of Mobile Subscribers (MSs). The RS comprises: a subscriber terminal operative in conformity with IEEE 802.16e Standard; and a BS operative in conformity with said IEEE 802.16e Standard, and wherein that subscriber terminal and that BS that belong to the RS are connected to each other, and wherein all communications transmitted from the at least one BS to the RS are in conformity with the IEEE 802.16e Standard.

摘要翻译： 提供中继站（RS）。 RS适于在TDD类型的无线通信网络中操作，该无线通信网络包括至少一个可操作以与RS和IP网络通信的基站（BS）以及多个移动用户（MS）。 RS包括：符合IEEE 802.16e标准的用户终端; 以及根据所述IEEE 802.16e标准操作的BS，并且其中，所述用户终端和属于所述RS的所述BS彼此连接，并且其中从所述至少一个BS发射到所述RS的所有通信都符合 IEEE 802.16e标准。

公开(公告)号：US07925295B2

公开(公告)日：2011-04-12

申请号：US11578598

申请日：2005-04-13

申请人： Vladimir Yanover ,  Tal Kaitz ,  Naftali Chayat

发明人： Vladimir Yanover ,  Tal Kaitz ,  Naftali Chayat

IPC分类号： H04M1/00

CPC分类号： H04W52/04

摘要： A method and devices are provided to allow reducing interferences occurring in adjacent wireless communication networks. When a subscriber device experiences interferences resulting from the operation of an adjacent wireless network, it transmits an adjustment signal which serves as a request for adjustment, to the base station operative at the adjacent wireless communication network. The adjacent base station that receives the adjustment signal retrieves adjustment information therefrom, and based on the retrieved information will determine whether it should effect a change in its transmission that would result in reducing the interferences experienced at the subscriber device sending the adjustment signal.

摘要翻译： 提供了一种方法和装置，以便减少相邻无线通信网络中发生的干扰。 当用户设备经历相邻无线网络的操作所产生的干扰时，向作为相邻无线通信网络的基站发送用作调整请求的调整信号。 接收调整信号的相邻基站从其检索调整信息，并且基于检索到的信息将确定其是否应当影响其传输的改变，这将导致减少在用户设备发送调整信号时经历的干扰。

公开(公告)号：US07295626B2

公开(公告)日：2007-11-13

申请号：US10096148

申请日：2002-03-08

申请人： Naftali Chayat

发明人： Naftali Chayat

IPC分类号： H04L27/00

CPC分类号： H04L5/06 ,  H04L5/023

摘要： A multiple access technique is described, which is capable of maintaining orthogonality between transmitted signals in multipath conditions, even when part of or all of the transmitted signals belong to the family of Single Carrier modulation. The Single Carrier signals are converted into multicarrier signals which utilize just a fraction of the spectral lines by transmitting each fragment of data several times. The orthogonal multiplexing technique enables transmitters to enjoy both the advantages of OFDMA, such as noninterference between signals, adaptive bandwidth allocation and wideband diversity, and the Peak-to-Average Power Ratio advantage of the single carrier modulation. The multiplexing technique described allows to incorporate in the same multiple access system both OFDM signals and Single Carrier signals.

摘要翻译： 描述了一种多址技术，其能够在多径条件下保持发射信号之间的正交性，即使部分或全部发射信号属于单载波调制族。 单载波信号被转换成多载波信号，其通过几次传送数据片段来仅利用一部分谱线。 正交复用技术使得发射机既可以享受OFDMA的优点，例如信号之间的无干扰，自适应带宽分配和宽带分集，以及单载波调制的峰均功率比优势。 所描述的复用技术允许在相同的多址系统中并入OFDM信号和单载波信号。

公开(公告)号：US09204445B2

公开(公告)日：2015-12-01

申请号：US12565045

申请日：2009-09-23

申请人： Naftali Chayat

发明人： Naftali Chayat

IPC分类号： H04W72/00 ,  H04W72/04

CPC分类号： H04W72/046

摘要： A wireless communications system is described which comprises a plurality of base stations, each comprises at least one beam generating means for generating narrow spatial beams for communicating with respective subscriber devices located along a direction to which the respective narrow beam is currently directed. The system's transmission resources are allocated so that a substantial part of the resources allocated to each of the beam generating means is different from a substantial part of transmission resources allocated to any of the angularly adjacent beam generating means at the respective base station and are different from the substantial part of the resources allocated to beam generating means associated with adjacent base stations and directed towards geographical areas located in a proximity to the geographical area towards which the respective narrow beam is directed.

摘要翻译： 描述了一种无线通信系统，其包括多个基站，每个基站包括至少一个波束生成装置，用于产生用于与沿着相应窄波束当前定向的方向定位的各个用户装置进行通信的窄空间波束。 分配系统的传输资源，使得分配给每个波束发生装置的资源的大部分不同于分配给相应基站处的角度相邻波束产生装置中的任何一个的传输资源的大部分，并且不同于 分配给与相邻基站相关联的波束产生装置的资源的大部分资源，并且指向位于相应窄波束所指向的地理区域附近的地理区域。

公开(公告)号：US09154236B2

公开(公告)日：2015-10-06

申请号：US13625863

申请日：2012-09-24

申请人： Haim Kupershmidt ,  Kobi Ben Atar ,  Naftali Chayat ,  Moshe Haiut

发明人： Haim Kupershmidt ,  Kobi Ben Atar ,  Naftali Chayat ,  Moshe Haiut

IPC分类号： H04B1/00 ,  H04B15/00 ,  H04B1/525

CPC分类号： H04B15/00 ,  H04B1/525

摘要： A system may be provided and may include a first transmitter; a first antenna, coupled to the first transmitter; wherein the first transmitter is arranged to transmit via the first antenna first radio frequency (RF) signals; a first receiver; a second antenna, coupled to the first receiver; the second antenna differs from the first antenna; an RF acquisition module that is arranged to acquire second RF signals that are representative of the first RF signals; and an RF suppression module, arranged to receive the second RF signals and to generate RF suppression signals for suppressing an effect of a transmission of the first RF signals on the first receiver, and to provide the RF suppression signals to the first receiver.

摘要翻译： 可以提供系统并且可以包括第一发射机; 第一天线，耦合到所述第一发射机; 其中所述第一发射机被布置成经由所述第一天线第一射频（RF）信号进行发射; 第一个接收器; 耦合到所述第一接收器的第二天线; 第二天线与第一天线不同; RF采集模块，被配置为获取表示第一RF信号的第二RF信号; RF抑制模块，被配置为接收第二RF信号并产生用于抑制第一RF信号在第一接收机上的传输效果的RF抑制信号，并向第一接收机提供RF抑制信号。

公开(公告)号：US20130320775A1

公开(公告)日：2013-12-05

申请号：US13985535

申请日：2012-02-15

申请人： Uri Weiss ,  Dror Ben-Yehuda ,  Naftali Chayat

发明人： Uri Weiss ,  Dror Ben-Yehuda ,  Naftali Chayat

IPC分类号： H01F38/14

CPC分类号： H01F38/14 ,  H04B3/56 ,  H04B2203/5483 ,  H04L25/0266 ,  H04L25/0274 ,  Y10T307/344

摘要： Coupling circuit for coupling a power line communication device to a power line network, including a first network port coupled between a network phase line and a first network line, a second network port coupled between a network neutral line and a second network line, a third network port coupled between a network ground line and a third network line, a first differential modem port including a first terminal and a second terminal, a second differential modem port including a third terminal and a fourth terminal, a first transformer including a first network side winding and a first modem side winding, a second transformer including a second network side winding and a second modem side winding, the transformers including respective terminals, a center tap extending from the midpoint of the first network side winding to a terminal of the second network side winding and a plurality of capacitors.

摘要翻译： 用于将电力线通信设备耦合到电力线网络的耦合电路，包括耦合在网络相线和第一网络线之间的第一网络端口，耦合在网络中性线和第二网络线之间的第二网络端口，第三网络端口 耦合在网络地线和第三网络线之间的网络端口，包括第一终端和第二终端的第一差分调制解调器端口，包括第三终端和第四终端的第二差分调制解调器端口，包括第一网络侧的第一变压器 绕组和第一调制解调器侧绕组，包括第二网络侧绕组和第二调制解调器侧绕组的第二变压器，变压器包括各自的端子，从第一网络侧绕组的中点延伸到第二网络的端子的中心抽头 侧绕组和多个电容器。

公开(公告)号：US08036675B2

公开(公告)日：2011-10-11

申请号：US12414817

申请日：2009-03-31

申请人： Naftali Chayat ,  David Zelikovsky ,  Ariel Doubchak ,  Nadav Lavi

发明人： Naftali Chayat ,  David Zelikovsky ,  Ariel Doubchak ,  Nadav Lavi

IPC分类号： H04W72/00

CPC分类号： H04W48/16 ,  H04W36/22

摘要： A load balancing system for a wireless network comprises: a base station parameter extraction unit able to extract base station availability parameters of currently available base stations; and a base station quality of service selector associated with said base station parameter extraction unit configured to determine from said parameters which of said available base stations is able to provide a currently required quality of service. The system requests resources from one such base station, thereby to ensure that mobile stations are distributed in a balanced manner between the available base stations. As well as quality of service, interference with other links may be taken into account, and uplinks and downlinks may be considered separately.

摘要翻译： 一种用于无线网络的负载平衡系统包括：能够提取当前可用基站的基站可用性参数的基站参数提取单元; 以及与所述基站参数提取单元相关联的基站服务质量选择器，被配置为从所述参数确定哪个可用基站能够提供当前所需的服务质量。 该系统从一个这样的基站请求资源，从而确保在可用基站之间以均衡的方式分配移动台。 除了服务质量之外，还可以考虑对其他链路的干扰，并且上行链路和下行链路可以单独考虑。

公开(公告)号：US20050036481A1

公开(公告)日：2005-02-17

申请号：US10934908

申请日：2004-09-02

申请人： Naftali Chayat ,  Tal Kaitz

发明人： Naftali Chayat ,  Tal Kaitz

IPC分类号： H04L27/26 ,  H04L12/28

CPC分类号： H04L27/261 ,  H04L27/262

摘要： A method of implementing OFDMA systems with enhanced preamble properties is presented. The transmit power is boosted during a preamble transmission, by utilizing preambles with a low Peak-to-Average Power Ratio (PAPR) property, as opposed to higher PAPR during the data portion of the transmission. Further, sets of preambles satisfying good PAPR properties in OFDMA systems are presented. The preambles satisfy a low Peak-to-Average Power Ratio (PAPR) property for numerous subsets of the usable subcarrier set. A method for generating a hierarchical set of preambles for OFDMA communication systems is described. The method hinges on the good PAPR properties of Golay's complementary sequences, and on hierarchical construction methods of larger complementary sequences out of smaller ones.

摘要翻译： 提出了一种实现具有增强前导码属性的OFDMA系统的方法。 通过利用具有低峰值与平均功率比（PAPR）特性的前导码，在发送的数据部分期间与较高的PAPR相反，在前同步码传输期间，发送功率被提升。 此外，提出了OFDMA系统中满足良好PAPR性质的前导码集合。 前导码符合可用子载波集合的多个子集的低峰值平均功率比（PAPR）特性。 描述了一种用于生成OFDMA通信系统的分级前置码组的方法。 该方法取决于Golay互补序列的良好PAPR性质，以及较小互补序列的较大互补序列的分层构造方法。