Method and apparatus for detecting CPM-modulated information symbols
    12.
    发明授权
    Method and apparatus for detecting CPM-modulated information symbols 有权
    用于检测CPM调制信息符号的方法和装置

    公开(公告)号:US06608873B1

    公开(公告)日:2003-08-19

    申请号:US09257115

    申请日:1999-02-25

    IPC分类号: H03D100

    摘要: Demodulation of CPM-modulated information symbols which are demodulated after being transmitted through an AWGN channel, using only partial whitened matched filtering, whereby finite pulses are produced which, however, are still accompanied by interferences in the form of remaining colored noise which can be approximately converted into white noise by a successive additional whitening filter so that the noise power will be minimized. For correcting the accompanying symbol interferences, a sequence estimation with reduced number of states follows.

    摘要翻译: 在通过AWGN信道发送之后解调的CPM调制的信息符号的解调,仅使用部分白化匹配滤波,由此产生有限的脉冲,然而仍然伴随着剩余彩色噪声形式的干扰,其可以是大约 通过连续的附加白化滤波器转换成白噪声,使得噪声功率将被最小化。 为了校正伴随的符号干扰,随后状态数减少的序列估计。

    Method and Device for Clock Recovery
    15.
    发明申请
    Method and Device for Clock Recovery 有权
    时钟恢复的方法和设备

    公开(公告)号:US20130181757A1

    公开(公告)日:2013-07-18

    申请号:US13825877

    申请日:2010-09-24

    IPC分类号: H03L7/08

    摘要: A method and a device for processing a signal determine a timing phase over an observation interval of an input signal. A frequency estimation is determined based on the timing phase. A phase correction is determined for the observation interval based on the timing phase and the frequency offset. Then the phase correction is used to adjust the timing of the input signal. Also, a communication system with at least one such device is described.

    摘要翻译: 用于处理信号的方法和装置确定在输入信号的观察间隔上的定时相位。 基于定时相位来确定频率估计。 基于定时相位和频率偏移确定观测间隔的相位校正。 然后使用相位校正来调整输入信号的定时。 此外,描述了具有至少一个这样的设备的通信系统。

    METHOD AND APPARATUS FOR TRANSMISSION OF TWO MODULATED SIGNALS VIA AN OPTICAL CHANNEL
    18.
    发明申请
    METHOD AND APPARATUS FOR TRANSMISSION OF TWO MODULATED SIGNALS VIA AN OPTICAL CHANNEL 有权
    用于通过光通道传输两个调制信号的方法和装置

    公开(公告)号:US20110222865A1

    公开(公告)日:2011-09-15

    申请号:US13120247

    申请日:2008-09-22

    IPC分类号: H04B10/06 H04B10/04

    摘要: The arrangement includes a transmitter (1-6) with two optical sources (1, 2) generating two optical carrier signals (L1, L2) having different frequencies. The optical carrier signals (L1, L2) are combined and divided in a first coupler (2) and fed to carrier signal inputs of two modulators (4, 5). The mixed carrier signals (L1+jL2, jL1+L2) are separately modulated by two modulation signals (a(t)) and (b(t)) and the modulated signals ((A1+jA2), (jB1+B2)) are combined in a first combiner and emitted as transmission signal (X(t)). Only on demodulator is necessary to regain the modulation signals (a(t), b(t)).

    摘要翻译: 该装置包括具有产生具有不同频率的两个光载波信号(L1,L2)的两个光源(1,2)的发射器(1-6)。 光载波信号(L1,L2)被组合并分成第一耦合器(2)并馈送到两个调制器(4,5)的载波信号输入端。 混合载波信号(L1 + jL2,jL1 + L2)由两个调制信号(a(t))和(b(t))分别调制,调制信号((A1 + jA2),(jB1 + B2)) 被组合在第一组合器中并作为传输信号(X(t))发射。 只有在解调器上才需要重新获得调制信号(a(t),b(t))。

    Method and device for clock recovery
    19.
    发明授权
    Method and device for clock recovery 有权
    时钟恢复的方法和设备

    公开(公告)号:US08964924B2

    公开(公告)日:2015-02-24

    申请号:US13825877

    申请日:2010-09-24

    摘要: A method and a device for processing a signal determine a timing phase over an observation interval of an input signal. A frequency estimation is determined based on the timing phase. A phase correction is determined for the observation interval based on the timing phase and the frequency offset. Then the phase correction is used to adjust the timing of the input signal. Also, a communication system with at least one such device is described.

    摘要翻译: 用于处理信号的方法和装置确定在输入信号的观察间隔上的定时相位。 基于定时相位来确定频率估计。 基于定时相位和频率偏移确定观测间隔的相位校正。 然后使用相位校正来调整输入信号的定时。 此外,描述了具有至少一个这样的设备的通信系统。

    OPTICAL COMMUNICATION APPARATUS AND METHOD
    20.
    发明申请
    OPTICAL COMMUNICATION APPARATUS AND METHOD 有权
    光通信设备和方法

    公开(公告)号:US20140003822A1

    公开(公告)日:2014-01-02

    申请号:US13977236

    申请日:2010-12-30

    IPC分类号: H04B10/61

    摘要: An apparatus for optical communication and optical communication method are provided, the method comprising the steps of generating an optical signal for transmitting the sequence of information data, transmitting the sequence of information data as a sequence of transmit matrices, S(k) being the k-th transmit matrix and k being a positive integer, and wherein the sequence of transmit matrices is transmitted through an optical channel characterized by a unitary channel matrix H, receiving a sequence of receive matrices, the k-th receive matrix R(k) being expressed as: R(k)=H·S(k)+N(k) wherein k is a positive integer and N(k) is a complex matrix of noise samples and providing a sequence of decision matrices, the k-th decision matrix D(k) being expressed as: D(k)=RH(k−1)R(k).

    摘要翻译: 提供了一种用于光通信和光通信方法的方法,所述方法包括以下步骤:产生用于发送信息数据序列的光信号,发送作为发送矩阵的序列的信息数据序列,S(k)为k 第k个发送矩阵,k为正整数,并且其中发送矩阵的序列通过由酉信道矩阵H表征的光信道发送,接收接收矩阵序列,第k个接收矩阵R(k) 表示为:R(k)= H·S(k)+ N(k)其中k是正整数,N(k)是噪声样本的复矩阵,并提供决策矩阵序列,第k个决策 矩阵D(k)表示为:D(k)= RH(k-1)R(k)。