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    • 3. 发明授权
    • Velocity enhancement for OFDM systems
    • OFDM系统的速度增强
    • US06904550B2
    • 2005-06-07
    • US10331692
    • 2002-12-30
    • Salvador SibecasGlafkos StratisCelestino CorralShahriar EnamiGregg RasorRobert Gorday
    • Salvador SibecasGlafkos StratisCelestino CorralShahriar EnamiGregg RasorRobert Gorday
    • H04L27/26G01R31/28H04J3/12H04L7/00
    • H04L5/0048H04L5/0007H04L25/0226H04L25/0232H04L27/34
    • An orthogonal frequency division multiplexing (OFDM) transmitter method, consistent with certain embodiments of the present invention arranges OFDM data symbols representing data bits for transmission in a packet. A prescribed pattern of OFDM data symbols are removed (212) and replaced (216) with pilot symbols. The packet is then transmitted (220) to an OFDM receiver that receives the packet (224) and determines a channel correction factor from the pilot pattern. The receiver then estimates a plurality of channel correction factors, one for each of the plurality of OFDM symbols representing data (228) and uses these correction factors to correct the OFDM symbols representing data (232). Arbitrary data are then inserted in place of the pilot symbols (236). The OFDM symbols representing data along with the arbitrary data are then decoded using an error correction decoder that corrects the errors induced by substitution of the pilot symbols for data symbols (240).
    • 与本发明的某些实施例一致的正交频分复用(OFDM)发射机方法将表示用于传输的数据比特的OFDM数据符号排列在分组中。 用导频符号去除(212)并且替换(216)OFDM数据符号的规定模式。 然后将分组发送(220)到接收分组(224)并从导频模式确定信道校正因子的OFDM接收机。 接收机然后估计多个信道校正因子,一个用于代表数据(228)的多个OFDM符号中的每一个,并且使用这些校正因子来校正表示数据(232)的OFDM符号。 然后插入任意数据代替导频符号(236)。 然后使用错误校正解码器对表示数据以及任意数据的OFDM符号进行解码,纠错解码器校正由数据符号(240)导频符号的替换引起的错误。
    • 7. 发明授权
    • Method and apparatus for enhancing the accuracy and speed of a ray launching simulation tool
    • 用于提高射线发射模拟工具的精度和速度的方法和装置
    • US08332196B2
    • 2012-12-11
    • US11948636
    • 2007-11-30
    • Salvador SibecasAlexander BijamovCelestino A. CorralGlafkos Stratis
    • Salvador SibecasAlexander BijamovCelestino A. CorralGlafkos Stratis
    • G06F17/50
    • G06F17/5009G06F2217/10G06F2217/78
    • A method (600) and simulation tool (200) having enhanced accuracy and speed for simulation using ray launching in a mixed environment (20) by using adaptive ray expansion mechanisms can include a memory (204) coupled to a processor (202). The processor can select (602) a target area within the mixed environment and modify (604) the propagation properties of the adaptive ray expansion mechanisms according to characteristics classified for the target area. The processor can further classify characteristics for the target area by transmitting and reflecting rays for indoor building regions and for outdoor building regions. The number of bounces or a power level threshold assigned to a transmitted ray is a function of the environment where it propagates. The simulation tool can determine the target area or a region of interest by using a global positioning service device (230) externally attached to a device performing functions of the simulation tool.
    • 具有增强的精度和速度的方法(600)和模拟工具(200)可以包括耦合到处理器(202)的存储器(204)的模拟,其利用自适应射线扩展机构在混合环境(20)中使用射线发射进行模拟。 处理器可以选择(602)混合环境内的目标区域,并根据针对目标区域分类的特征修改(604)自适应射线扩展机构的传播特性。 处理器可以通过传输和反射室内建筑区域和室外建筑区域的射线来进一步对目标区域的特征进行分类。 分配给发射光线的反弹次数或功率电平阈值是其传播的环境的函数。 仿真工具可以通过使用外部连接到执行仿真工具的功能的设备的全球定位服务设备(230)来确定目标区域或感兴趣区域。
    • 8. 发明授权
    • WLAN communication system and method with mobile base station
    • WLAN通信系统和方法与移动基站
    • US07593718B2
    • 2009-09-22
    • US10334383
    • 2002-12-31
    • Paul E. GordayRobert M. GordaySalvador Sibecas
    • Paul E. GordayRobert M. GordaySalvador Sibecas
    • H04L12/58
    • H04W4/12H04W84/005H04W84/12
    • A WLAN communication system (10) and method employs mobile WLAN base stations (16) that include WLAN transceivers (26) and memory (30) for storing received messages from one or more mobile WLAN devices (12a-12n). The mobile WLAN base stations (16) serve as moving message carriers or message repeaters of messages for the mobile WLAN devices. In one embodiment, a mobile WLAN base station (16) receives messages transmitted by several mobile WLAN devices (12a-12n), temporarily stores the received messages, and delivers the stored messages to a fixed WLAN base station or another mobile WLAN base station when the mobile WLAN base station (16) moves to within communication range of the applicable fixed or other mobile WLAN base station.
    • WLAN通信系统(10)和方法采用移动WLAN基站(16),其包括用于存储来自一个或多个移动WLAN设备(12a-12n)的接收到的消息的WLAN收发器(26)和存储器(30)。 移动WLAN基站(16)用作用于移动WLAN设备的消息的移动消息载体或消息中继器。 在一个实施例中,移动WLAN基站(16)接收由若干移动WLAN设备(12a-12n)发送的消息,临时存储所接收的消息,并且将存储的消息传送到固定的WLAN基站或另一个移动WLAN基站, 移动WLAN基站(16)移动到可应用的固定或其他移动WLAN基站的通信范围内。
    • 9. 发明申请
    • Method and system for identifying material composition based upon polarization trajectories
    • 基于极化轨迹识别材料组成的方法和系统
    • US20070143036A1
    • 2007-06-21
    • US11296083
    • 2005-12-07
    • Glafkos StratisEric EatonSalvador Sibecas
    • Glafkos StratisEric EatonSalvador Sibecas
    • G01N31/00
    • G01N23/00
    • A system and method for determining a most likely material composition of an object (102). At least one respective stored radiation polarization transformation (500) is stored for at least one material composition at a plurality of wavelengths. A transmitted electromagnetic signal (112) with at least one wavelength within the plurality of wavelengths and that has a predetermined transmitted polarization profile is transmitted. The transmitted signal (112) encounters an object (102) and is received as at least one received signal (116, 118). Processing determines a respective received polarization for each of the at least one wavelength of the received signal (116, 118), determines a respective calculated polarization transformation between the transmitted polarization profile and the received polarization of the respective wavelength, for each of the at least one wavelength,. The processing also compares the respective calculated polarization transformations to the at least one respective stored radiation polarization transformations (500) for at least one of the plurality of material compositions and based on those comparisons, estimates a most likely material composition for the object (102).
    • 一种用于确定物体(102)的最可能的材料组成的系统和方法。 对于多个波长的至少一种材料组合物存储至少一个相应的存储的辐射偏振变换(500)。 传输具有多个波长内的至少一个波长并且具有预定的透射偏振曲线的透射电磁信号(112)。 所发送的信号(112)遇到对象(102)并被接收为至少一个接收信号(116,118)。 对于接收信号(116,118)的至少一个波长中的每一个,处理确定相应的接收极化,确定至少为每个波长的所发送的偏振曲线和相应波长的接收偏振之间的相应计算的偏振变换 一个波长。 该处理还将针对多个材料组合物中的至少一个的各个计算的偏振变换与至少一个相应的存储的辐射极化转换(500)进行比较,并且基于这些比较,估计对象(102)的最可能的材料组成, 。