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公开(公告)号：US20210266140A1
公开(公告)日：2021-08-26
申请号：US17314779
申请日：2021-05-07
发明人： Nebojsa Stojanovic
摘要： A timing recovery apparatus for signal reception in a data transmission system comprises an equalizer to equalize a received signal and a phase detector connected after the timing recovery equalizer that generates a clock tone from absolute values of the received signal after equalization.
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公开(公告)号：US11101891B2
公开(公告)日：2021-08-24
申请号：US16845489
申请日：2020-04-10
摘要： An optical communication system that comprises a transmitter adapted to generate a signal by modulating a transmission data as low power consumption symbols of an amplitude modulation format and a monitoring data (MD) as high power consumption symbols of the amplitude modulation format, the MD comprising at least one transmitter parameter and/or at least one receiver parameter of communicating the transmission data. A binary logarithm of a total number of the low power consumption symbols and the high power consumption symbols is a non-integer.
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公开(公告)号：US09916240B2
公开(公告)日：2018-03-13
申请号：US13891926
申请日：2013-05-10
发明人： Nebojsa Stojanovic , Yu Zhao , Yang Li
CPC分类号： G06F12/0607 , H03M13/23 , H03M13/2703 , H03M13/275 , H03M13/2778 , H04L1/0071
摘要： The present invention relates to an interleaving and de-interleaving method, an interleaver and a de-interleaver. The interleaving method includes: receiving N×M frames of data, and sequentially storing, with each frame as a unit, the N×M frames of data in storage space indicated by N×M addresses of a first storage unit; transferring the data stored in the storage space indicated by an ((X−1)×M+Y+1)th address of the first storage unit to the storage space indicated by a (Y×N+X)th address of a second storage unit; and according to an address sequence, outputting the data stored in the space indicated by the N×M addresses of the second storage unit frame by frame. The interleaving and de-interleaving solutions of the present invention have low implementation complexity, and high capacity of correcting a burst bit error.
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公开(公告)号：US09906307B2
公开(公告)日：2018-02-27
申请号：US15094117
申请日：2016-04-08
发明人： Nebojsa Stojanovic
IPC分类号： H04B10/61 , H04B10/079
CPC分类号： H04B10/6161 , H04B10/07951
摘要： The invention relates to an apparatus for characterizing a chromatic dispersion of an optical receive signal, the apparatus comprising a delay means for delaying the optical receive signal by a predetermined time delay to obtain a delayed signal, the delayed signal being delayed with respect to the optical receive signal, a phase detecting means for determining a first value indicating a phase delay of the optical receive signal, and for determining a second value indicating a phase delay of the delayed signal, and a processor for determining a chromatic dispersion indicator upon the basis of the first value and the second value, the chromatic dispersion indicator characterizing the chromatic dispersion.
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公开(公告)号：US11637684B2
公开(公告)日：2023-04-25
申请号：US17314779
申请日：2021-05-07
发明人： Nebojsa Stojanovic
摘要： A timing recovery apparatus for signal reception in a data transmission system comprises an equalizer to equalize a received signal and a phase detector connected after the timing recovery equalizer that generates a clock tone from absolute values of the received signal after equalization.
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公开(公告)号：US11018908B2
公开(公告)日：2021-05-25
申请号：US16719007
申请日：2019-12-18
发明人： Nebojsa Stojanovic
摘要： An optical communication system includes a transmission side system for multi-level pulse amplitude modulation (PAM) and a corresponding receiver side system, where the transmission side comprises a laser source providing an optical beam, a signal source of electrical signals to be modulated onto the optical beam, and a modulator coupled to the laser source and the signal source to modulate the electrical signals onto the optical beam using amplitude modulation and at least four signal levels, wherein the at least four signal levels are non-uniformly distributed. The receiver side includes a corresponding equalizer which is implemented as a filter of the form f1y+f2y2+f0, where y is the incoming signal and the parameters f0, f1 and f2 are obtained using an adaptive filter.
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公开(公告)号：US11018768B2
公开(公告)日：2021-05-25
申请号：US16706007
申请日：2019-12-06
发明人： Nebojsa Stojanovic
IPC分类号： H04B10/25 , H04B10/2513 , H04B10/556 , H04L1/00
摘要： A binary encoder includes an input configured to receive a binary signal, an encoding processor configured to compute a plurality of different variations of the binary signal, combine each of the different variations with a different redundancy sequence to create a plurality of optional output binary sequences, and select one of the optional output binary sequences according to a binary digit prevalence, and an output configured to output the selected binary sequence. A decoder configured to identify a redundancy sequence of a received binary signal to select a transformation function according to the redundancy sequence and to convert the binary signal according to the transformation function.
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8.发明申请APPARATUS FOR CHARACTERIZING A CHROMATIC DISPERSION OF AN OPTICAL RECEIVE SIGNAL 有权用于表征光接收信号的色度分散的装置公开(公告)号：US20160226596A1
公开(公告)日：2016-08-04
申请号：US15094117
申请日：2016-04-08
发明人： Nebojsa Stojanovic
IPC分类号： H04B10/61
CPC分类号： H04B10/6161 , H04B10/07951
摘要： The invention relates to an apparatus for characterizing a chromatic dispersion of an optical receive signal, the apparatus comprising a delay means for delaying the optical receive signal by a predetermined time delay to obtain a delayed signal, the delayed signal being delayed with respect to the optical receive signal, a phase detecting means for determining a first value indicating a phase delay of the optical receive signal, and for determining a second value indicating a phase delay of the delayed signal, and a processor for determining a chromatic dispersion indicator upon the basis of the first value and the second value, the chromatic dispersion indicator characterizing the chromatic dispersion.
摘要翻译： 本发明涉及一种用于表征光接收信号的色散的装置，该装置包括用于延迟光接收信号预定时间延迟以获得延迟信号的延迟装置，该延迟信号相对于光学信号被延迟 接收信号;相位检测装置，用于确定指示光接收信号的相位延迟的第一值，以及用于确定指示延迟信号的相位延迟的第二值;以及处理器，用于基于 第一值和第二值，表示色散的色散指示符。
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公开(公告)号：US11025405B2
公开(公告)日：2021-06-01
申请号：US16247368
申请日：2019-01-14
发明人： Nebojsa Stojanovic , Changsong Xie
摘要： The present invention relates to a multi-channel IM-DD optical transceiver comprising at least one transmitter and a receiver, and a method for equalizing input samples at an adjusted sampling phase using a quality parameter linearly proportional to a BER. The data transmission and reception use a single master channel and slave channels, which have a baud rate equal to or lower than the baud rate of the master channel. A reliable and identical clocking of all the channels is obtained through either the receiver clock of the master channel when they are received from a single transmitter or a reference clock whose frequency is higher than the highest clock frequency amongst all the channels when they are received from a combination of transmitters. An enhanced timing recovery circuit is also provided to select optimized finite impulse response filters, calculate filter coefficients and generate the receiver clock of the master channel.
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