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    LOW COMPLEXITY FLEXIBLE BEAM-WIDTH FOR DIRECTIONAL MODULATION
    1.
    发明申请
    LOW COMPLEXITY FLEXIBLE BEAM-WIDTH FOR DIRECTIONAL MODULATION 审中-公开

    公开(公告)号：US20180152229A1

    公开(公告)日：2018-05-31

    申请号：US15827813

    申请日：2017-11-30

    申请人： Mohammed Hafez ,  Huseyin Arslan ,  Tamer Khattab

    发明人： Mohammed Hafez ,  Huseyin Arslan ,  Tamer Khattab

    IPC分类号： H04B7/0456 ,  H04B7/06 ,  H01Q3/26 ,  H01Q21/24

    CPC分类号： H04B7/0456 ,  H01Q3/26 ,  H01Q3/28 ,  H01Q3/40 ,  H01Q21/245 ,  H01Q25/00 ,  H04B7/0617 ,  H04B7/0697

    摘要： Method and system for transmitting a directionally modulated data stream via an antenna array. A first signal processing circuitry receives a data symbol of a first data stream, maps the first data stream to a specified number of sub-beams based on a stream beam-width assignment, assigns a direction angle for transmission of the data stream, and transmits in parallel, for each of the specified number of sub-beams, an instance of the data symbol to a second signal processing circuitry. The second signal processing circuitry generates antenna array element weights based on the data symbol and a matrix having a DFT structure. The matrix is independent of the assigned direction angle. The data symbol is transmitted via the antenna array utilizing the antenna array element weights. The DFT is implemented as a fast Fourier transform. White noise is transmitted in the sub-beams beams outside the beam-width requirement of the data stream.

    Low complexity flexible beam-width for directional modulation
    2.
    发明授权
    Low complexity flexible beam-width for directional modulation 有权

    公开(公告)号：US10135506B2

    公开(公告)日：2018-11-20

    申请号：US15827813

    申请日：2017-11-30

    申请人： Mohammed Hafez ,  Huseyin Arslan ,  Tamer Khattab

    发明人： Mohammed Hafez ,  Huseyin Arslan ,  Tamer Khattab

    IPC分类号： H04B7/06 ,  H04B7/0456 ,  H01Q21/24 ,  H01Q3/26 ,  H01Q3/40 ,  H01Q25/00 ,  H01Q3/28

    摘要： Method and system for transmitting a directionally modulated data stream via an antenna array. A first signal processing circuitry receives a data symbol of a first data stream, maps the first data stream to a specified number of sub-beams based on a stream beam-width assignment, assigns a direction angle for transmission of the data stream, and transmits in parallel, for each of the specified number of sub-beams, an instance of the data symbol to a second signal processing circuitry. The second signal processing circuitry generates antenna array element weights based on the data symbol and a matrix having a DFT structure. The matrix is independent of the assigned direction angle. The data symbol is transmitted via the antenna array utilizing the antenna array element weights. The DFT is implemented as a fast Fourier transform. White noise is transmitted in the sub-beams beams outside the beam-width requirement of the data stream.

    USING ARTIFICIAL SIGNALS TO MAXIMIZE CAPACITY AND SECRECY OF MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION
    3.
    发明申请
    USING ARTIFICIAL SIGNALS TO MAXIMIZE CAPACITY AND SECRECY OF MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION 审中-公开

    公开(公告)号：US20190379430A1

    公开(公告)日：2019-12-12

    申请号：US16239372

    申请日：2019-01-03

    申请人： Berker Pekoz ,  Mohammed Hafez ,  Selcuk Kose ,  Huseyin Arslan

    发明人： Berker Pekoz ,  Mohammed Hafez ,  Selcuk Kose ,  Huseyin Arslan

    IPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04L25/02 ,  H04L1/00

    摘要： A system and method for increasing the capacity of a Multiple-Input Multiple-Output (MIMO) system at desired user's locations and reducing the capacity at locations, other than that of the desired user, while also providing secrecy. Knowing the channel coefficient between each transmitter and receiver antenna pair at the transmitter, the method of the present invention calculates the artificial signal that minimizes the Euclidean distance between the desired and received data symbols if the precoding/combining matrix pair from the set that has the minimum Euclidean distance to the singular value decomposition (SVD) of the channel matrix is used for transmission and reception. The artificial signal may be fed to the precoder, instead of the actual desired data symbols, or may be transmitted directly to reduce computational complexity, power consumption and processing delay if the hardware configuration allows.

    System and method for adaptive OFDM guards
    7.
    发明授权
    System and method for adaptive OFDM guards 有权

    公开(公告)号：US10411819B1

    公开(公告)日：2019-09-10

    申请号：US16024051

    申请日：2018-06-29

    申请人： Ali Faith Demir ,  Huseyin Arslan

    发明人： Ali Faith Demir ,  Huseyin Arslan

    IPC分类号： H04B17/336 ,  H04J11/00 ,  H04W72/08 ,  H04L5/00 ,  H04W72/04

    摘要： A system and method for reducing the OFDM out-of-band emissions (OOBE) by utilizing a transmitter windowing operation that smooths the inherent rectangular pulse shape of the OFDM signals. The technique retains the main design of the OFDM receivers and provides backward compatibility for the existing OFDM-based systems. The guard band and the window parameters that control the guard duration are jointly optimized regarding the use case and the power offset between the users. To fully exploit and further increase the potential of adaptive guards, an interference-based scheduling algorithm is proposed as well.

    Orthogonal frequency division multiplexing (OFDM) transmitter and receiver windowing for adjacent channel interference (ACI) suppression and rejection
    10.
    发明授权
    Orthogonal frequency division multiplexing (OFDM) transmitter and receiver windowing for adjacent channel interference (ACI) suppression and rejection 有权
    用于邻近信道干扰（ACI）抑制和拒绝的正交频分复用（OFDM）发射机和接收机窗口

    公开(公告)号：US09363127B1

    公开(公告)日：2016-06-07

    申请号：US14530162

    申请日：2014-10-31

    申请人： Ertugrul Guvenkaya ,  Huseyin Arslan

    发明人： Ertugrul Guvenkaya ,  Huseyin Arslan

    IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/26

    CPC分类号： H04L27/2647 ,  H04L25/03821 ,  H04L25/03834 ,  H04L27/2626 ,  H04L27/2637 ,  H04L27/2653

    摘要： An optimum time domain windowing scheme for orthogonal frequency-division multiplexing (OFDM)-based waveforms in the sense of spectral concentration is proposed. Instead of evenly suppressing the sidelobes along the frequency, the sidelobe power is concentrated within a guard band while maximally suppressing the power for a desired frequency range. This is achieved by employing optimum finite duration pulses, prolate spheroidal wave functions (PSWF), to shape the OFDM transmit pulse. Also with per-subcarrier windowing scheme, the effect of inner subcarriers on sidelobes is diminished by utilizing the concentration bandwidth versus out-of-band power trade-off in PSWF and the multicarrier nature of the OFDM.

    摘要翻译： 提出了在频谱浓度意义上的基于正交频分复用（OFDM）的波形的最佳时域加窗方案。 代替均匀地抑制沿着频率的旁瓣，旁瓣功率集中在保护带内，同时最大限度地抑制期望频率范围的功率。 这是通过采用最佳有限持续时间脉冲，扁平球形波函数（PSWF）来实现的，以形成OFDM发射脉冲。 同样采用每子载波加窗方案，通过利用集中带宽与PSWF中的带外功率权衡和OFDM的多载波特性，内部副载波对旁瓣的影响减小。