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1. 发明授权

US09847841B1 I/Q imbalance correction for an optical-transport system 有权
公开(公告)号：US09847841B1
公开(公告)日：2017-12-19
申请号：US15379154
申请日：2016-12-14
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda
IPC分类号： H04B10/61 , H04B10/40 , H04B10/548
CPC分类号： H04B10/6161 , H04B10/40 , H04B10/548
摘要： A coherent optical receiver that is capable of obtaining separate estimates of the I/Q phase imbalances caused by the front-end circuits of the receiver and transmitter. In an example embodiment, the receiver's I/Q imbalance is estimated using equalization coefficients of a first digital equalizer located upstream from the carrier-recovery module in the train of digital-signal processing implemented at the receiver, whereas the transmitter's I/Q imbalance is estimated using equalization coefficients of a second digital equalizer located downstream from the carrier-recovery module. The receiver DSP can then use the first estimate to carry out signal processing that reduces adverse effects of the receiver's I/Q imbalance on data recovery at the receiver. The receiver can also provide the estimate of the transmitter's I/Q phase imbalance to the transmitter, which can then perform digital signal pre-distortion directed at compensating that I/Q imbalance at the transmitter.

2. 发明申请

US20170272195A1 SUB-WAVELENGTH GRANULARITY FOR TRANSPORT OF MULTICARRIER OPTICAL SIGNALS 有权
公开(公告)号：US20170272195A1
公开(公告)日：2017-09-21
申请号：US15070682
申请日：2016-03-15
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda , Sian Chong J. Lee
IPC分类号： H04J14/02 , H04L27/26
CPC分类号： H04J14/0202 , H04J14/0267 , H04J14/0298 , H04J14/06 , H04L27/2601
摘要： We disclose an optical add-drop multiplexer that can apply different routing operations to different subcarriers of a data frame. In an example embodiment, the digital signal processor (DSP) of the optical add-drop multiplexer carries out subcarrier-specific add, drop, and pass-through operations in the electrical frequency domain, which enables the DSP to only partially unwrap the pass-through subcarriers, thereby at least partially avoiding some of the more processing-power-hungry DSP operations and reducing the sub-wavelength routing latency accordingly. Also disclosed is an example data-frame structure that can be used to provide subcarrier-specific routing instructions to the optical add-drop multiplexer.

3. 发明授权

US10330778B2 Coherent lidar system using tunable carrier-suppressed single-sideband modulation 有权
公开(公告)号：US10330778B2
公开(公告)日：2019-06-25
申请号：US15172406
申请日：2016-06-03
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda
IPC分类号： G01B9/02 , G01S17/10 , G01S17/58 , G01S7/483 , G01S7/484 , G01S7/486
摘要： We disclose a lidar system that includes a modulator-based probe-light generator and a coherent optical receiver. The probe-light generator uses tunable carrier-suppressed single-sideband modulation to generate frequency-chirped optical pulses for the optical-probe beam directed at the target. The coherent optical receiver uses a homodyne detection scheme in which a split portion of the optical-probe beam is used as an optical local oscillator signal for detecting a corresponding optical beam reflected by the target. The resulting electrical RF signals generated by the receiver can be processed, e.g., using a disclosed signal-processing method, to determine one or both of the distance to the target and the velocity of the target.

4. 发明授权

US10284303B2 Feedforward decision-free pilot-aided phase noise estimation for coherent optical M-QAM systems 有权
公开(公告)号：US10284303B2
公开(公告)日：2019-05-07
申请号：US15612385
申请日：2017-06-02
申请人： Alcatel-Lucent USA Inc.
发明人： Chen Zhu , Noriaki Kaneda , Young-Kai Chen
IPC分类号： H04B10/06 , H04B10/61 , H04L7/00
摘要： An apparatus includes an electronic digital signal processor having electrical inputs for receiving a first sequence of measurements of values of a transmitted modulated optical carrier received in a coherent optical receiver and having electrical outputs for a stream of determined transmitted data values demodulated therein from the first sequence. The electronic digital signal processor has first circuitry to determine phase offsets of received pilot values from the first sequence. Additionally, the electronic digital signal processor has second circuitry to correct phase offsets of received ones of the data values from the determined phases of pilot values and data values being temporally interleaved in the transmitted modulated optical carrier. A system and a method are also included.

5. 发明申请

US20160050023A1 LOW POWER EQUALIZER FOR AN OPTICAL RECEIVER 有权
标题翻译：用于光接收器的低功率均衡器
公开(公告)号：US20160050023A1
公开(公告)日：2016-02-18
申请号：US14460593
申请日：2014-08-15
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda , Timo Pfau , Jeffrey Lee
IPC分类号： H04B10/61
CPC分类号： H04B10/616 , H04B10/6161
摘要： An optical receiver includes an equalizer to generate a plurality of equalization coefficients corresponding to a plurality of frequencies of an optical signal received by the optical receiver. The equalizer zeroes out a first subset of the equalization coefficients corresponding to a first subset of the plurality of frequency components and applies a second subset of non-zero equalization coefficients to the first signal. The optical receiver may also include a chromatic dispersion compensator to generate inverse chromatic dispersion coefficients corresponding to the plurality of frequency components, and to zero out a first subset of the inverse chromatic dispersion coefficients corresponding to the first subset of the plurality of frequency components and further to apply a second subset of non-zero inverse chromatic dispersion coefficients to a second optical signal.
摘要翻译：光接收机包括均衡器以产生对应于由光接收器接收的光信号的多个频率的多个均衡系数。所述均衡器将对应于所述多个频率分量的第一子集的所述均衡系数的第一子集置零，并将非零均衡系数的第二子集应用于所述第一信号。光接收机还可以包括色散补偿器，用于产生对应于多个频率分量的反色散系数，并且将对应于多个频率分量的第一子集的反色散系数的第一子集清零以将非零反色彩色散系数的第二子集应用于第二光信号。

6. 发明授权

US09147939B2 Broadside antenna systems 有权
标题翻译：宽边天线系统
公开(公告)号：US09147939B2
公开(公告)日：2015-09-29
申请号：US13853600
申请日：2013-03-29
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda , Shahriar Shahramian , Yves Baeyens , Young-Kai Chen
IPC分类号： H01Q19/30 , H01Q21/08 , H01Q9/16 , H01Q13/00 , H01Q9/04 , H01Q9/06 , H01Q9/28
CPC分类号： H01Q9/16 , H01Q9/0407 , H01Q9/065 , H01Q9/285 , H01Q13/00 , H01Q19/30 , H01Q21/08
摘要： At least one example embodiment discloses an antenna system. The antenna system includes a single printed circuit board (PCB) substrate and an antenna integrated with the single PCB substrate, the antenna being a broadside low-profile microstrip antenna.
摘要翻译：至少一个示例性实施例公开了一种天线系统。天线系统包括单个印刷电路板（PCB）基板和与单个PCB基板集成的天线，天线是宽边薄型微带天线。

7. 发明授权

US09264145B2 Optical receiver having a chromatic-dispersion compensation module with a multibranch filter-bank structure 有权
标题翻译：具有具有多分支滤波器组结构的色散补偿模块的光接收机
公开(公告)号：US09264145B2
公开(公告)日：2016-02-16
申请号：US14154370
申请日：2014-01-14
申请人： Alcatel-Lucent
发明人： Sebastian A. Randel , Fabian N. Hauske , Noriaki Kaneda
IPC分类号： H04B1/10 , H04B10/12 , H04B10/61
CPC分类号： H04B10/616 , H04B10/6161
摘要： An optical receiver having an electronic dispersion-compensation module with two parallel signal-processing branches configured to provide a greater range of dispersion compensation than that provided by a prior-art device of comparable implementation complexity. In an example embodiment, each of the signal-processing branches includes a respective bank of finite-impulse-response filters that are configured in accordance with a different respective approximation of the group delay that needs to be compensated. The two group-delay approximations used by the filter banks rely on different respective step functions, each having a respective plurality of quantized steps, with the transitions between adjacent steps in one step function being spectrally aligned with the flat portions of the corresponding steps in the other step function. The filter banks may be further configured to apply different respective frequency-dependent phase-shift and/or amplitude-scaling profiles designed to reduce signal distortions associated with the transitions between adjacent steps in the step functions.
摘要翻译：一种具有电子色散补偿模块的光接收机，其具有两个并行信号处理分支，其被配置为提供比具有相当的实现复杂度的现有技术设备提供的更大的色散补偿范围。在示例实施例中，每个信号处理分支包括相应的有限脉冲响应滤波器组，其被配置为根据需要补偿的组延迟的不同的相应近似。滤波器组使用的两个群延迟近似依赖于不同的各自的阶梯函数，每个阶跃函数具有相应的多个量化步长，其中在一个阶梯函数中的相邻步骤之间的跃迁与该阶跃函数中的相应步骤的平坦部分进行频谱对准其他步骤功能。滤波器组可以被进一步配置为应用不同的相应的频率相移和/或幅度缩放轮廓，被设计为减少与步进功能中的相邻步骤之间的转变相关联的信号失真。

8. 发明申请

US20180269985A1 FEEDFORWARD DECISION-FREE PILOT-AIDED PHASE NOISE ESTIMATION FOR COHERENT OPTICAL M-QAM SYSTEMS 审中-公开
公开(公告)号：US20180269985A1
公开(公告)日：2018-09-20
申请号：US15612385
申请日：2017-06-02
申请人： Alcatel-Lucent USA Inc.
发明人： Chen Zhu , Noriaki Kaneda , Young-Kai Chen
IPC分类号： H04B10/61 , H04L7/00
CPC分类号： H04B10/6165 , H04B10/612 , H04L7/0029 , H04L7/0075
摘要： An apparatus includes an electronic digital signal processor having electrical inputs for receiving a first sequence of measurements of values of a transmitted modulated optical carrier received in a coherent optical receiver and having electrical outputs for a stream of determined transmitted data values demodulated therein from the first sequence. The electronic digital signal processor has first circuitry to determine phase offsets of received pilot values from the first sequence. Additionally, the electronic digital signal processor has second circuitry to correct phase offsets of received ones of the data values from the determined phases of pilot values and data values being temporally interleaved in the transmitted modulated optical carrier. A system and a method are also included.

9. 发明授权

US09762379B2 Clock recovery for an optical receiver 有权
公开(公告)号：US09762379B2
公开(公告)日：2017-09-12
申请号：US15018019
申请日：2016-02-08
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda
IPC分类号： H04L7/00 , H04B10/61 , H04L7/033 , H04J14/06 , H04J14/02 , H04J14/04
CPC分类号： H04L7/0075 , H04B10/6165 , H04B10/697 , H04J14/02 , H04J14/04 , H04J14/06 , H04L7/0331
摘要： We disclose an optical receiver for direct detection of an intensity-modulated optical signal, the digital signal processor of which employs a clock-recovery circuit capable of reliably recovering the internal clock of the received optical signal without relying on dispersion-compensation processing even if the signal's eye pattern is substantially closed. In an example embodiment, the clock-recovery circuit comprises a frequency-domain phase detector that operates to determine and track in time the sampling phase using only a subset of the digital spectral components corresponding to the received optical signal. The determined sampling phase is then used to synchronize the digital electrical samples of the received optical signal with the internal clock thereof by way of digital interpolation or through appropriate control of the sampling frequency and phase of the receiver's analog-to-digital converter. Some embodiments of the clock-recovery circuit can beneficially be used in a two-channel optical receiver.

10. 发明申请

US20170230167A1 CLOCK RECOVERY FOR AN OPTICAL RECEIVER 有权
公开(公告)号：US20170230167A1
公开(公告)日：2017-08-10
申请号：US15018019
申请日：2016-02-08
申请人： Alcatel-Lucent USA Inc.
发明人： Noriaki Kaneda
IPC分类号： H04L7/00 , H04J14/04 , H04J14/06 , H04J14/02 , H04B10/61 , H04L7/033
CPC分类号： H04L7/0075 , H04B10/6165 , H04B10/697 , H04J14/02 , H04J14/04 , H04J14/06 , H04L7/0331
摘要： We disclose an optical receiver for direct detection of an intensity-modulated optical signal, the digital signal processor of which employs a clock-recovery circuit capable of reliably recovering the internal clock of the received optical signal without relying on dispersion-compensation processing even if the signal's eye pattern is substantially closed. In an example embodiment, the clock-recovery circuit comprises a frequency-domain phase detector that operates to determine and track in time the sampling phase using only a subset of the digital spectral components corresponding to the received optical signal. The determined sampling phase is then used to synchronize the digital electrical samples of the received optical signal with the internal clock thereof by way of digital interpolation or through appropriate control of the sampling frequency and phase of the receiver's analog-to-digital converter. Some embodiments of the clock-recovery circuit can beneficially be used in a two-channel optical receiver.

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