公开(公告)号：US10775476B2

公开(公告)日：2020-09-15

申请号：US15556656

申请日：2016-05-17

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Sajid Ahmed ,  Taha Bouchoucha ,  Tareq Al-Naffouri ,  Mohamed-Slim Alouini

IPC: G01S7/02 ,  G01S13/87 ,  G01S13/89

Abstract: Various examples of methods and systems are provided for direct closed-form finite alphabet constant-envelope waveforms for planar array beampatterns. In one example, a method includes defining a waveform covariance matrix based at least in part upon a two-dimensional fast Fourier transform (2D-FFT) analysis of a frequency domain matrix Hf associated with a planar array of antennas. Symbols can be encoded based upon the waveform covariance matrix and the encoded symbols can be transmitted via the planar array of antennas. In another embodiment, a system comprises an N×M planar array of antennas and transmission circuitry configured to transmit symbols via a two-dimensional waveform beampattern defined based at least in part upon a 2D-FFT analysis of a frequency domain matrix Hf associated with the planar array of antennas.

公开(公告)号：US11337635B2

公开(公告)日：2022-05-24

申请号：US17427162

申请日：2021-03-08

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Sajid Ahmed ,  Mohamed-Slim Alouini

IPC: A61B5/00 ,  A61B5/352 ,  A61B5/355 ,  A61B5/353

Abstract: A method for automatically and independently associating a cardiovascular disease with an electrocardiogram, ECG, signal includes receiving the ECG signal; denoising the ECG signal using a wavelet transform; determining peaks of the denoised ECG signal by applying a combination of (1) two event-related moving averages and (2) fractional-Fourier-transform (FrFT) to the denoised ECG signal; and passing the peaks through a classifier for identifying the cardiovascular disease that corresponds to the ECG signal.

公开(公告)号：US09774354B2

公开(公告)日：2017-09-26

申请号：US14751916

申请日：2015-06-26

Applicant: King Abdullah University of Science and Technology

Inventor： Sajid Ahmed ,  Mohamed Slim Alouini ,  Seifallah Jardak

IPC: H04B1/04 ,  H04B7/06 ,  H04L27/36 ,  G01S13/26 ,  G01S13/32 ,  G01S7/35 ,  G01S7/32

CPC classification number: H04B1/0475 ,  G01S7/32 ,  G01S13/26 ,  G01S13/325 ,  G01S2007/356 ,  H04B7/0617 ,  H04L27/36

Abstract: Various examples of methods and systems are provided for generation of correlated finite alphabet waveforms using Gaussian random variables in, e.g., radar and communication applications. In one example, a method includes mapping an input signal comprising Gaussian random variables (RVs) onto finite-alphabet non-constant-envelope (FANCE) symbols using a predetermined mapping function, and transmitting FANCE waveforms through a uniform linear array of antenna elements to obtain a corresponding beampattern. The FANCE waveforms can be based upon the mapping of the Gaussian RVs onto the FANCE symbols. In another example, a system includes a memory unit that can store a plurality of digital bit streams corresponding to FANCE symbols and a front end unit that can transmit FANCE waveforms through a uniform linear array of antenna elements to obtain a corresponding beampattern. The system can include a processing unit that can encode the input signal and/or determine the mapping function.

公开(公告)号：US20160013819A1

公开(公告)日：2016-01-14

申请号：US14751916

申请日：2015-06-26

Applicant: King Abdullah University of Science and Technology

Inventor： Sajid Ahmed ,  Mohamed Slim Alouini ,  Seifallah Jardak

IPC: H04B1/04 ,  H04B7/06 ,  H04L27/36

CPC classification number: H04B1/0475 ,  G01S7/32 ,  G01S13/26 ,  G01S13/325 ,  G01S2007/356 ,  H04B7/0617 ,  H04L27/36

Abstract: Various examples of methods and systems are provided for generation of correlated finite alphabet waveforms using Gaussian random variables in, e.g., radar and communication applications. In one example, a method includes mapping an input signal comprising Gaussian random variables (RVs) onto finite-alphabet non-constant-envelope (FANCE) symbols using a predetermined mapping function, and transmitting FANCE waveforms through a uniform linear array of antenna elements to obtain a corresponding beampattern. The FANCE waveforms can be based upon the mapping of the Gaussian RVs onto the FANCE symbols. In another example, a system includes a memory unit that can store a plurality of digital bit streams corresponding to FANCE symbols and a front end unit that can transmit FANCE waveforms through a uniform linear array of antenna elements to obtain a corresponding beampattern. The system can include a processing unit that can encode the input signal and/or determine the mapping function.

Abstract translation: 提供了各种方法和系统的例子，用于在例如雷达和通信应用中使用高斯随机变量来产生相关的有限字母波形。 在一个示例中，一种方法包括使用预定的映射函数将包含高斯随机变量（RV）的输入信号映射到有限字母非恒定包络（FANCE）符号上，以及通过天线元件的均匀线性阵列传输FANCE波形， 获得相应的波峰图。 FANCE波形可以基于高斯RV到FANCE符号的映射。 在另一示例中，系统包括可以存储对应于FANCE符号的多个数字比特流的存储器单元和可以通过天线元件的均匀线性阵列传输FANCE波形以获得相应的波峰图案的前端单元。 该系统可以包括可对输入信号进行编码和/或确定映射功能的处理单元。