公开(公告)号：US09819081B2

公开(公告)日：2017-11-14

申请号：US14325300

申请日：2014-07-07

申请人： Hassan Mohamed El-Sallabi ,  Mohamed Mahmoud Abdallah ,  Khalid Ali Qaraqe ,  Gregory H. Huff ,  Jean-Francois Chamberland-Tremblay

发明人： Hassan Mohamed El-Sallabi ,  Mohamed Mahmoud Abdallah ,  Khalid Ali Qaraqe ,  Gregory H. Huff ,  Jean-Francois Chamberland-Tremblay

IPC分类号： G01S5/04 ,  H01Q3/24 ,  G01S3/38 ,  H01Q21/06 ,  G01S3/14 ,  G01S3/72

CPC分类号： H01Q3/24 ,  G01S3/14 ,  G01S3/38 ,  G01S3/72 ,  H01Q21/065

摘要： The reconfigurable radio direction finder system and method uses a reconfigurable antenna to electronically cycle through a plurality of different antenna configurations to determine a signal direction. Specifically, the reconfigurable antenna is cycled through N different antenna configurations, where N is an integer greater than one, where each antenna configuration has a pointing direction associated therewith defined by an elevation angle θn of an n-th antenna configuration, where n is an integer between 1 and N, and an azimuthal angle φn of the n-th antenna configuration. A received signal strength of the radio signal is measured for each of the antenna configurations as a power output of the n-th antenna configuration, Pn. A spherical weighted directional mean vector (XDF, YDF, ZDF) is then estimated for the radio signal as X DF = 1 N ⁢ ∑ n = 1 N ⁢ P n ⁢ ⁢ cos ⁡ ( ϕ n ) ⁢ ⁢ sin ⁡ ( θ n ) , ⁢ Y DF = 1 N ⁢ ∑ n = 1 N ⁢ P n ⁢ ⁢ sin ⁡ ( ϕ n ) ⁢ ⁢ sin ⁡ ( θ n ) ⁢ ⁢ and Z DF = 1 N ⁢ ∑ n = 1 N ⁢ P n ⁢ ⁢ sin ⁡ ( θ n ) .

公开(公告)号：US20110188478A1

公开(公告)日：2011-08-04

申请号：US12982591

申请日：2010-12-30

申请人： Ayman Yehia Elezabi ,  Mohamed Tawfeek Kashef ,  Mohamed Mahmoud Abdallah ,  Mohamed M. Khalry

发明人： Ayman Yehia Elezabi ,  Mohamed Tawfeek Kashef ,  Mohamed Mahmoud Abdallah ,  Mohamed M. Khalry

IPC分类号： H04B7/216

CPC分类号： H04B7/216

摘要： A method for interference-minimizing code assignment and system parameter selection for code division multiple access (CDMA) networks is disclosed. The method is performed at a base station or mobile station configured to operate in a CDMA radio network. The method includes receiving transmissions from user devices seeking to access the CDMA radio network. A spreading code is selected for a first user device seeking to access the network, using at least one cross-correlation parameter, to reduce multiple access interference between communications involving the first user device and other devices using the CDMA network. The method does not require knowledge of the active user codes or even the codebook from which these codes are assigned. Furthermore, it does not require knowledge of bit or chip epoch or the received powers of active users. However, the method can benefit from such knowledge in several ways, examples of which are disclosed. A method for explicitly estimating the bit or chip epoch is also disclosed.

摘要翻译： 公开了一种用于对码分多址（CDMA）网络进行干扰最小化码​​分配和系统参数选择的方法。 该方法在被配置为在CDMA无线电网络中操作的基站或移动台处执行。 该方法包括从寻求接入CDMA无线电网络的用户设备接收传输。 使用至少一个互相关参数来选择寻求访问网络的第一用户设备的扩展码，以减少涉及第一用户设备的通信和使用CDMA网络的其他设备之间的多址接入干扰。 该方法不需要知道活动用户代码或甚至分配了这些代码的码本。 此外，它不需要知道位或码片时代或活跃用户的接收功率。 然而，该方法可以通过几种方式从这些知识中获益，其实例被公开。 还公开了一种用于明确估计比特或码元时代的方法。

公开(公告)号：US08737362B2

公开(公告)日：2014-05-27

申请号：US12982591

申请日：2010-12-30

申请人： Ayman Yehia Elezabi ,  Mohamed Tawfeek Kashef ,  Mohamed Mahmoud Abdallah ,  Mohamed M. Khairy

发明人： Ayman Yehia Elezabi ,  Mohamed Tawfeek Kashef ,  Mohamed Mahmoud Abdallah ,  Mohamed M. Khairy

IPC分类号： H04B7/216 ,  H04W4/00 ,  H04J11/00

CPC分类号： H04B7/216

摘要： A method for interference-minimizing code assignment and system parameter selection for code division multiple access (CDMA) networks is disclosed. The method is performed at a base station or mobile station configured to operate in a CDMA radio network. The method includes receiving transmissions from user devices seeking to access the CDMA radio network. A spreading code is selected for a first user device seeking to access the network, using at least one cross-correlation parameter, to reduce multiple access interference between communications involving the first user device and other devices using the CDMA network. The method does not require knowledge of the active user codes or even the codebook from which these codes are assigned. Furthermore, it does not require knowledge of bit or chip epoch or the received powers of active users. However, the method can benefit from such knowledge in several ways, examples of which are disclosed. A method for explicitly estimating the bit or chip epoch is also disclosed.

摘要翻译： 公开了一种用于对码分多址（CDMA）网络进行干扰最小化码​​分配和系统参数选择的方法。 该方法在被配置为在CDMA无线电网络中操作的基站或移动台处执行。 该方法包括从寻求接入CDMA无线电网络的用户设备接收传输。 使用至少一个互相关参数来选择寻求访问网络的第一用户设备的扩展码，以减少涉及第一用户设备的通信和使用CDMA网络的其他设备之间的多址接入干扰。 该方法不需要知道活动用户代码或甚至分配了这些代码的码本。 此外，它不需要知道位或码片时代或活跃用户的接收功率。 然而，该方法可以通过几种方式从这些知识中获益，其实例被公开。 还公开了一种用于明确估计比特或码元时代的方法。