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    ESTIMATION OF LENGTH OF CHANNEL IMPULSE RESPONSE
    2.
    发明申请
    ESTIMATION OF LENGTH OF CHANNEL IMPULSE RESPONSE 有权
    通道长度反应的估计

    公开(公告)号：US20090067519A1

    公开(公告)日：2009-03-12

    申请号：US12161344

    申请日：2007-01-15

    申请人： Constant Paul Marie Jozef Baggen ,  Sri Andari Husen ,  Alessio Filippi

    发明人： Constant Paul Marie Jozef Baggen ,  Sri Andari Husen ,  Alessio Filippi

    IPC分类号： H04L27/28

    CPC分类号： G02B27/2214 ,  H04N13/305 ,  H04N13/317 ,  H04N13/351

    摘要： In a receiver for processing OFDM encoded signals, wherein the OFDM encoded digital signals are transmitted by means of a symbol in each of subcarrier frequency channels, with at least some of said subcarriers containing user data symbols, an initial estimate of a channel frequency response is formed from magnitudes of user data symbols received in those subcarriers. Then, a correlation function of a channel impulse response is estimated by performing an inverse Fourier transform on the initial estimate of the channel frequency response, and the length of the channel impulse response is estimated by examining peaks in the estimated correlation function of the channel impulse response.

    摘要翻译： 在用于处理OFDM编码信号的接收机中，其中通过每个子载波频率信道中的符号来发送OFDM编码的数字信号，其中至少一些所述子载波包含用户数据符号，信道频率响应的初始估计是 由在这些子载波中接收的用户数据符号的大小形成。 然后，通过对信道频率响应的初始估计执行逆傅里叶变换来估计信道脉冲响应的相关函数，并且通过检查信道脉冲的估计的相关函数中的峰值来估计信道脉冲响应的长度 响应。

    Driving a light source
    7.
    发明授权
    Driving a light source 有权
    驾驶光源

    公开(公告)号：US08253353B2

    公开(公告)日：2012-08-28

    申请号：US12668034

    申请日：2008-07-14

    申请人： Constant Paul Marie Jozef Baggen ,  Andries Pieter Hekstra ,  Johan Paul Marie Gerard Linnartz

    发明人： Constant Paul Marie Jozef Baggen ,  Andries Pieter Hekstra ,  Johan Paul Marie Gerard Linnartz

    IPC分类号： H05B37/02

    CPC分类号： H05B37/0272 ,  H04B10/1141 ,  H04B10/116 ,  H04L25/4904 ,  H05B37/0245 ,  H05B37/0254

    摘要： A method for driving a light source (11, 12, 13) is described, wherein the light source is alternately switched ON and OFF in an ON/OFF pattern, wherein the duty cycle of the ON/OFF pattern is varied to vary the average light intensity of the light source, and wherein the shape of the ON/OFF pattern is varied to transmit data. Thus, a control signal for the light source comprises data information as well as duty cycle information. The duty cycle is varied within a range from almost zero to almost 100%, and data is varied and transmitted without affecting the duty cycle.

    摘要翻译： 描述了用于驱动光源（11,12,13）的方法，其中在ON / OFF模式中光源被交替地接通和断开，其中ON / OFF模式的占空比被改变以改变平均值 光源的光强度，并且其中ON / OFF图案的形状被改变以传输数据。 因此，用于光源的控制信号包括数据信息以及占空比信息。 占空比在几乎零到几乎100％的范围内变化，并且数据被变化和传输而不影响占空比。

    Method of joint decoding of possibly mutilated code words
    9.
    发明授权
    Method of joint decoding of possibly mutilated code words 失效
    联合解码可能残缺码字的方法

    公开(公告)号：US07185263B2

    公开(公告)日：2007-02-27

    申请号：US10506375

    申请日：2003-02-14

    申请人： Andries Pieter Hekstra ,  Constant Paul Marie Jozef Baggen ,  Ludovicus Marinus Gerardus Maria Tolhuizen

    发明人： Andries Pieter Hekstra ,  Constant Paul Marie Jozef Baggen ,  Ludovicus Marinus Gerardus Maria Tolhuizen

    IPC分类号： H03M13/00

    CPC分类号： H03M13/37 ,  G11B20/18

    摘要： A method of decoding possibly mutilated code words (r) of a code (C) includes decoding the differences (D) of a number (L−1) of pairs of possibly mutilated code words (rib, ri+1) to obtain estimates (u, v) for the differences of the corresponding pairs of code words (ci, ci+1), combining the estimates (u, v) to obtain a number (L) of at least two corrupted versions (wj) of a particular code word (c), forming a code vector (z) from the number (L) of corrupted versions (wj) of the particular code word (c) in each coordinate, decoding the code vector (z) to a decoded code word (c′) in the code (C), and using the generator matrix (G) to obtain the information word (m) and the address word (a) embedded in the decoded code word (c′).

    摘要翻译： 解码代码（C）的可能残缺代码字（r）的方法包括解码可能残缺的代码字对（L-1）的数量（L-1）的数量（L-1） （i，i + 1），以获得对应的代码字对（c i，i i，i i + 1）的差的估计（u，v） 将所述估计（u，v）组合以获得特定码字（c）的至少两个损坏版本（w SUB）的数目（L），形成码矢量（ z）从每个坐标中的特定码字（c）的损坏版本号（L）的数量（L）开始，将码矢量（z）解码为解码码字（c'）， 在代码（C）中，并且使用生成矩阵（G）来获得嵌入在解码码字（c'）中的信息字（m）和地址字（a）。

    Modulation for coded light transmission
    10.
    发明申请
    Modulation for coded light transmission 有权
    编码光传输调制

    公开(公告)号：US20130202310A1

    公开(公告)日：2013-08-08

    申请号：US13879253

    申请日：2011-10-19

    申请人： Ronald Rietman ,  Constant Paul Marie Jozef Baggen ,  Hendricus Theodorus Gerardus Maria Theodorus Gerardus Maria Penning De Vries

    发明人： Ronald Rietman ,  Constant Paul Marie Jozef Baggen ,  Hendricus Theodorus Gerardus Maria Theodorus Gerardus Maria Penning De Vries

    IPC分类号： H04B10/116

    CPC分类号： H04B10/116 ,  H05B37/0272

    摘要： Coded light has been proposed to enable advanced control of light sources and transmit information using light sources. Sequences of channel symbols to drive the light source are determined from sequences of source symbols such that no visible flicker is present in coded light emitted by the light sources. Each source symbol is mapped to a composite channel symbol comprising at least one first channel symbol which may be identical to the current source symbol and at least one second channel symbol which may be a function of the current source symbol and at least one future and/or past source symbol.

    摘要翻译： 已经提出编码光使得能够使用光源对光源进行高级控制和传输信息。 用于驱动光源的通道符号的序列由源符号的序列确定，使得在由光源发射的编码光中不存在可见的闪烁。 每个源符号被映射到复合信道符号，该复合信道符号包括至少一个第一信道符号，其可以与当前源符号相同，并且至少一个第二信道符号可以是当前源符号和至少一个未来的函数，和/ 或过去的源符号。