公开(公告)号：US20170302485A1

公开(公告)日：2017-10-19

申请号：US15417950

申请日：2017-01-27

Applicant: Maite Brandt-Pearce ,  Mohammad Noshad

Inventor： Maite Brandt-Pearce ,  Mohammad Noshad

IPC: H04L25/49 ,  H04L1/00 ,  H04L1/06 ,  H04L25/03 ,  H04B10/524

CPC classification number: H04L25/4902 ,  H04B10/116 ,  H04B10/524 ,  H04L1/0071 ,  H04L1/0668 ,  H04L25/03006 ,  H04L2025/0335 ,  H04L2025/03789

Abstract: An expurgated pulse position modulation (EPPM) technique can be used to encode information for wireless transmission. Such an EPPM technique can be compatible with a simple receiver architecture, such as including a shift register and pulse position modulation (PPM) decoder. A multi-level EPPM (MEPPM) approach can increase the available symbols in the modulation constellation and can be used to accommodate multiple users or devices concurrently. Interleaving techniques can be used such as to reduce inter-symbol interference. An optical transmitter and an optical receiver can be used, such as including using energy in a visible range of frequencies. In an example, an optical source such as including one or more light emitting diodes can provide visible light for illumination, and the EPPM technique can include using codewords specified to provide a desired dimming level when such codewords are used to intensity modulate the optical source, without perceptible flicker.

公开(公告)号：US10411799B1

公开(公告)日：2019-09-10

申请号：US15914749

申请日：2018-03-07

Applicant: Mohammad Noshad ,  Maite Brandt-Pearce

Inventor： Mohammad Noshad ,  Maite Brandt-Pearce

IPC: H04B10/114 ,  H04B10/116 ,  H04B10/00 ,  H05B37/02

Abstract: Optical wireless communication systems configured to provide Hadamard coded information are described. In some examples, the system includes a light fixture configured to encode communication information received from an area network as Hadamard coded information, and provide the Hadamard coded information as a first Hadamard coded modulated optical emission from a light emitting diode. An optical wireless communication device can receive and decode the optical emission and provide the decoded information to an electronic device coupled to the optical wireless communication device.

公开(公告)号：US09571312B2

公开(公告)日：2017-02-14

申请号：US14554915

申请日：2014-11-26

Applicant: Maite Brandt-Pearce ,  Mohammad Noshad

Inventor： Maite Brandt-Pearce ,  Mohammad Noshad

IPC: H04L25/49 ,  H04B10/116 ,  H04L25/03 ,  H04L1/06 ,  H04L1/00

CPC classification number: H04L25/4902 ,  H04B10/116 ,  H04B10/524 ,  H04L1/0071 ,  H04L1/0668 ,  H04L25/03006 ,  H04L2025/0335 ,  H04L2025/03789

Abstract: An expurgated pulse position modulation (EPPM) technique can be used to encode information for wireless transmission. Such an EPPM technique can be compatible with a simple receiver architecture, such as including a shift register and pulse position modulation (PPM) decoder. A multi-level EPPM (MEPPM) approach can increase the available symbols in the modulation constellation and can be used to accommodate multiple users or devices concurrently. Interleaving techniques can be used such as to reduce inter-symbol interference. An optical transmitter and an optical receiver can be used, such as including using energy in a visible range of frequencies. In an example, an optical source such as including one or more light emitting diodes can provide visible light for illumination, and the EPPM technique can include using codewords specified to provide a desired dimming level when such codewords are used to intensity modulate the optical source, without perceptible flicker.

Abstract translation: 可以使用expered的脉冲位置调制（EPPM）技术对无线传输的信息进行编码。 这种EPPM技术可以与简单的接收机架构兼容，例如包括移位寄存器和脉冲位置调制（PPM）解码器。 多级EPPM（MEPPM）方法可以增加调制星座中的可用符号，并且可以用于同时容纳多个用户或设备。 可以使用交织技术来减少符号间干扰。 可以使用光发射机和光接收机，例如包括在可见的频率范围内使用能量。 在一个示例中，诸如包括一个或多个发光二极管的光源可以提供用于照明的可见光，并且EPPM技术可以包括使用被指定为提供期望的调光电平的码字，当这样的码字用于对光源进行强度调制时， 没有可察觉的闪烁。

公开(公告)号：US20200333422A1

公开(公告)日：2020-10-22

申请号：US16956712

申请日：2018-12-21

Applicant: PEARCE Maite BRANDT ,  Hamid HOSSEINIANFAR ,  Mohammad NOSHAD ,  UNIVERSITY OF VIRGINIA PATENT FOUNDATION

Inventor： Maite Brandt-Pearce ,  Hamid Hosseinianfar ,  Mohammad Noshad

IPC: G01S1/70 ,  G01S5/16 ,  H04B10/11 ,  H04L25/02 ,  H04B10/50 ,  H04B10/69

Abstract: A positioning system and method includes a transmitter, a receiver, and a controller. The transmitter includes at least one energy source configured to emit an optical or quasi-optical electromagnetic signal as a channel communication. The receiver includes at least one detector element configured to receive the channel communication. The controller is connected to the receiver and configured to estimate a position of the transmitter within a space using a reference map of the space and one or more diffuse components of an impulse response of the channel communication.

公开(公告)号：US20150147069A1

公开(公告)日：2015-05-28

申请号：US14554915

申请日：2014-11-26

Applicant: Maite Brandt-Pearce ,  Mohammad Noshad

Inventor： Maite Brandt-Pearce ,  Mohammad Noshad

IPC: H04L25/49 ,  H04L1/00 ,  H04L1/06 ,  H04B10/116 ,  H04L25/03

CPC classification number: H04L25/4902 ,  H04B10/116 ,  H04B10/524 ,  H04L1/0071 ,  H04L1/0668 ,  H04L25/03006 ,  H04L2025/0335 ,  H04L2025/03789

Abstract: An expurgated pulse position modulation (EPPM) technique can be used to encode information for wireless transmission. Such an EPPM technique can be compatible with a simple receiver architecture, such as including a shift register and pulse position modulation (PPM) decoder. A multi-level EPPM (MEPPM) approach can increase the available symbols in the modulation constellation and can be used to accommodate multiple users or devices concurrently. Interleaving techniques can be used such as to reduce inter-symbol interference. An optical transmitter and an optical receiver can be used, such as including using energy in a visible range of frequencies. In an example, an optical source such as including one or more light emitting diodes can provide visible light for illumination, and the EPPM technique can include using codewords specified to provide a desired dimming level when such codewords are used to intensity modulate the optical source, without perceptible flicker.

Abstract translation: 可以使用expered的脉冲位置调制（EPPM）技术对无线传输的信息进行编码。 这种EPPM技术可以与简单的接收机架构兼容，例如包括移位寄存器和脉冲位置调制（PPM）解码器。 多级EPPM（MEPPM）方法可以增加调制星座中的可用符号，并且可以用于同时容纳多个用户或设备。 可以使用交织技术来减少符号间干扰。 可以使用光发射机和光接收机，例如包括在可见的频率范围内使用能量。 在一个示例中，诸如包括一个或多个发光二极管的光源可以提供用于照明的可见光，并且EPPM技术可以包括使用被指定为提供期望的调光电平的码字，当这些码字用于对光源进行强度调制时， 没有可察觉的闪烁。

公开(公告)号：US11408959B2

公开(公告)日：2022-08-09

申请号：US16956712

申请日：2018-12-21

Applicant: University of Virginia Patent Foundation ,  Maite Brandt-Pearce ,  Hamid Hosseinianfar ,  Mohammad Noshad

Inventor： Maite Brandt-Pearce ,  Hamid Hosseinianfar ,  Mohammad Noshad

IPC: H04B10/114 ,  G01S1/70 ,  G01S5/16 ,  H04B10/11 ,  H04B10/50 ,  H04B10/69 ,  H04L25/02

Abstract: A positioning system and method includes a transmitter, a receiver, and a controller. The transmitter includes at least one energy source configured to emit an optical or quasi-optical electromagnetic signal as a channel communication. The receiver includes at least one detector element configured to receive the channel communication. The controller is connected to the receiver and configured to estimate a position of the transmitter within a space using a reference map of the space and one or more diffuse components of an impulse response of the channel communication.

公开(公告)号：US20190082520A1

公开(公告)日：2019-03-14

申请号：US16024251

申请日：2018-06-29

Applicant: Mohammad Noshad ,  Gaurav Patil ,  Xu Wang

Inventor： Mohammad Noshad ,  Gaurav Patil ,  Xu Wang

IPC: H05B37/02 ,  H04B10/2575 ,  H04B10/40

Abstract: Certain configurations of optical wireless communication devices that comprise a plurality of narrow beam width light emitting diodes to provide a wide-angle transmitter are described. The transmitter can be used, for example, in optical wireless communication systems. The transmitter can be designed to select one of the light emitting diodes that points towards the receiver for more reliable information exchange or data transmission. The particular light emitting diode used may change as a position of an end user changes.