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1. 发明申请

WO2009088666A1 METHOD AND APPARATUS FOR COMPUTATION OF WIRELESS SIGNAL DIFFRACTION IN A THREE-DIMENSIONAL SPACE 审中-公开
标题翻译：用于计算三维空间中无线信号差分的方法和装置
公开(公告)号：WO2009088666A1
公开(公告)日：2009-07-16
申请号：PCT/US2008/086956
申请日：2008-12-16
申请人： MOTOROLA, INC. , BIJAMOV, Alexander , CORRAL, Celestino , SIBECAS, Salvador , STRATIS, Glafkos
发明人： BIJAMOV, Alexander , CORRAL, Celestino , SIBECAS, Salvador , STRATIS, Glafkos
IPC分类号： H04B7/24 , H04B7/26
CPC分类号： H04B17/3911
摘要： A method (20 or 500) and system (200) for method for computing wireless signal diffraction in a three-dimensional space can include the steps of selecting at least a source point, finding (19) sinkpoints that fail to have a line-of-sight path to the source point and storing the sinkpoints found, placing (21) diffraction points on all edges of a three-dimensional geometry, and building (24) a visibility matrix based on weighted paths for all source points and all sink points. The method can further include applying (25) a path finding algorithm on the visibility matrix for each sink point to all source points and storing store optimal paths for each source point to all sink points if they exist. The method can further include determining (23) if a last source point is selected before building the visibility matrix.
摘要翻译：一种用于在三维空间中计算无线信号衍射的方法的方法（20或500）和系统（200）可以包括以下步骤：至少选择源点，找到（19）不具有线到源点的路径和存储所找到的接收点，将（21）衍射点放置在三维几何的所有边缘上，并基于所有源点和所有接收点的加权路径构建（24）可见性矩阵。该方法可以进一步包括将每个宿点的可见性矩阵上的路径查找算法应用于所有源点，并且如果存在，则将存储每个源点的最佳路径存储到所有宿点。该方法还可以包括确定（23）如果在构建可见性矩阵之前选择最后一个源点。

2. 发明申请

WO2009073369A3 SYSTEM AND METHOD TO IMPROVE RF SIMULATIONS 审中-公开
公开(公告)号：WO2009073369A3
公开(公告)日：2009-06-11
申请号：PCT/US2008/084110
申请日：2008-11-20
申请人： MOTOROLA, INC. , STRATIS, Glafkos , BIJAMOV, Alexander , CORRAL, Celestino , SIBECAS, Salvador
发明人： STRATIS, Glafkos , BIJAMOV, Alexander , CORRAL, Celestino , SIBECAS, Salvador
IPC分类号： H04W16/22 , H04W16/28 , H01Q3/24 , H04B7/04 , H04W84/06 , G01S5/02 , H04W84/18
摘要： A system (100) and method (400) for improving Radio Frequency (RF) Antenna Simulation is provided. The method can include determining (402) a proximity of an antenna (250) to a scattering structure (210), determining (410) a switching distance to the scattering structure that establishes when to switch the antenna on (416) and off (418) from a composite antenna pattern to a free space antenna pattern, and predicting RF coverage of the antenna responsive to the switching. The switching distance can be a function of a material type and a surface geometry of the scattering structure and a wavelength of the antenna. The method can also include evaluating a sensory mismatch in the antenna, and using a composite antenna pattern corresponding to the sensory mismatch.

3. 发明申请

WO2009073335A3 METHOD AND APPARATUS OF COMBINING MIXED RESOLUTION DATABASES AND MIXED RADIO FREQUENCY PROPAGATION TECHNIQUES 审中-公开
公开(公告)号：WO2009073335A3
公开(公告)日：2009-06-11
申请号：PCT/US2008/083307
申请日：2008-11-13
申请人： MOTOROLA, INC. , CORRAL, Celestino , BIJAMOV, Alexander , SIBECAS, Salvador , STRATIS, Glafkos
发明人： CORRAL, Celestino , BIJAMOV, Alexander , SIBECAS, Salvador , STRATIS, Glafkos
IPC分类号： G06F15/02 , G06F9/00 , H04B1/40
摘要： A method (10 or 500) and system (200) for simulating and improving accuracy of empirical propagation models for radio frequency coverage can include a display (210) and a processor (202) coupled to the display. The processor can be operable to input (502 and 504) low-resolution data and high-resolution data, select (506) an area of interest being simulated for empirical propagation models, and classify (508) receivers as belonging to a predetermined type of object. If a receiver in the area of interest is a low resolution object, then normal losses can be applied (510). If a receiver in the area of interest is a high resolution object, then losses specific to the high resolution object can be applied (512). If a receiver is classified as being inside a building, then the processor can further compute (516) a median power for a location of the receiver and add in-building penetration losses.

4. 发明申请

WO2009073334A3 METHOD AND APPARATUS FOR ENHANCING THE ACCURACY AND SPEED OF A RAY LAUNCHING SIMULATION TOOL 审中-公开
公开(公告)号：WO2009073334A3
公开(公告)日：2009-06-11
申请号：PCT/US2008/083297
申请日：2008-11-13
申请人： MOTOROLA, INC. , SIBECAS, Salvador , BIJAMOV, Alexander , CORRAL, Celestino
发明人： SIBECAS, Salvador , BIJAMOV, Alexander , CORRAL, Celestino
IPC分类号： H04W16/20
摘要： 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.

5. 发明申请

WO2004062118A2 AN ENHANCED OFDM BY USE OF ALTERNATING POLARIZATION STATES 审中-公开
标题翻译：通过使用替代极化状态的增强OFDM
公开(公告)号：WO2004062118A2
公开(公告)日：2004-07-22
申请号：PCT/US2003/040466
申请日：2003-12-18
申请人： MOTOROLA, INC.
发明人： ENAMI, Shahriar , CORRAL, Celestino , RASOR, Gregg , SIBECAS, Salvador , STRATIS, Glafkos
IPC分类号： H04B
CPC分类号： H04L27/2614 , H01Q21/24 , H04B7/10 , H04L27/2602
摘要： An Orthogonal Frequency Division Multiplexer (OFDM) transmitter and receiver apparatus consistent with certain embodiments of the present invention maps (204) a first portion of data to be transmitted to a first polarization state and a second portion of the data to a second polarization state. A first transmitter (216) transmits the first portion of the data as a set of first OFDM subcarriers using an antenna (230) exhibiting a first polarization. A second transmitter (234) transmits the second portion of the data as a set of second OFDM subcarriers using an antenna (240) exhibiting a second polarization, wherein the first polarization is orthogonal to the second polarization. A receiver apparatus uses a first antenna (302) exhibiting the first polarization and a second antenna (306) exhibiting the second polarlization to receive and decode first and second sets of OFDM subcarriers and combines them into a stream of data.
摘要翻译：与本发明的某些实施例一致的正交频分复用器（OFDM）发射机和接收机设备将要传输的数据的第一部分映射（204）到数据的第一部分到第二极化状态。第一发射机（216）使用表现出第一极化的天线（230）来发送数据的第一部分作为一组第一OFDM子载波。第二发射机（234）使用表现出第二极化的天线（240）将数据的第二部分作为第二OFDM子载波的集合发送，其中第一极化与第二极化正交。接收机装置使用展示第一极化的第一天线（302）和展现第二极化的第二天线（306）来接收和解码第一和第二组OFDM子载波，并将它们组合成数据流。

6. 发明申请

WO2004061464A1 VELOCITY ENHANCEMENT FOR OFDM SYSTEMS 审中-公开
标题翻译： OFDM系统的速度增强
公开(公告)号：WO2004061464A1
公开(公告)日：2004-07-22
申请号：PCT/US2003/040465
申请日：2003-12-18
申请人： MOTOROLA, INC.
发明人： SIBECAS, Salvador , STRATIS, Glafkos , CORRAL, Celestino , ENAMI, Shahriar , RASOR, Gregg , GORDAY, Robert
IPC分类号： G01R31/28
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/0232 , H04L27/34
摘要： 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).
摘要翻译：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。

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