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1. 发明授权

US10879951B2 Systems and methods for synchronization by transceivers with OQPSK demodulation 有权
公开(公告)号：US10879951B2
公开(公告)日：2020-12-29
申请号：US16124983
申请日：2018-09-07
申请人： GUANGZHOU ON-BRIGHT ELECTRONICS CO., LTD.
发明人： Jiaqiang Huang , Jiapeng Zhang
IPC分类号： H04B1/707 , H04B1/7073 , H04B1/709 , H04L27/38
CPC分类号： H04B1/7073 , H04B1/709 , H04L27/3818 , H04B2201/694 , H04B2201/7073
摘要： System and method for processing an analog signal. For example, a demodulator for processing an analog signal includes one or more analog-to-digital converters configured to receive an analog signal and generate a digital signal based at least in part on the analog signal, and a correlator coupled to the one or more analog-to-digital converters and configured to generate a stream of correlation results including a first plurality of correlation results, a second plurality of correlation results, and a third plurality of correlation results. The first plurality of correlation results is different from the second plurality of correlation results by at least one correlation result, and the second plurality of correlation results is different from the third plurality of correlation results by at least another correlation result.

2. 发明申请

US20190013876A1 COHERENT OPTICAL RECEPTION DEVICE 审中-公开
公开(公告)号：US20190013876A1
公开(公告)日：2019-01-10
申请号：US15748892
申请日：2016-10-17
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION , NTT Electronics Corporation
发明人： Kengo HORIKOSHI , Mitsuteru YOSHIDA , Seiji OKAMOTO , Eiichi HOSOYA , Etsushi YAMAZAKI , Yasuharu ONUMA , Tomohiro TAKAMUKU , Naoki MIURA , Sadayuki YASUDA
IPC分类号： H04B10/61 , H04B10/532 , H04J14/06
CPC分类号： H04B10/6166 , G02F1/21 , G02F2001/212 , H04B10/2513 , H04B10/2569 , H04B10/532 , H04B10/616 , H04B10/6161 , H04B10/6162 , H04B10/6164 , H04B10/6165 , H04B2210/252 , H04J14/06 , H04L27/0014 , H04L27/362 , H04L27/3818 , H04L27/3827 , H04L27/3863 , H04L2027/0026
摘要： A coherent optical reception device includes a local oscillation laser that supplies laser light, a coherent optical reception front-end unit that receives a multi-level modulated optical signal, demodulates the optical signal on the basis of the laser light, and converts a demodulated optical signal into an electrical analog signal, an analog-to-digital converter that converts the analog signal into a digital signal, a compensation unit that compensates for an influence of dispersion due to a wavelength or a polarized wave of the optical signal and recovers a carrier phase of the digital signal, a constellation distortion compensation unit that compensates for constellation distortion of the multi-level modulation included in the digital signal in which an influence of dispersion is compensated for by the compensation unit, and an error correction decoding unit that performs error correction of the digital signal in which the constellation distortion is compensated for.

3. 发明授权

US09992050B2 System and apparatus and associated methods for multiple channel signal generating and analyzing with wide bandwidth 有权
公开(公告)号：US09992050B2
公开(公告)日：2018-06-05
申请号：US15388526
申请日：2016-12-22
申请人： Keysight Technologies, Inc.
发明人： Hong-Wei Kong , Ya Jing
IPC分类号： H04L27/26 , H04B7/0413 , H04B7/06 , H04L7/00 , H04L7/04 , H04L27/227 , H04L27/38 , H04L27/00
CPC分类号： H04L27/2602 , H04B7/0413 , H04B7/06 , H04L7/0091 , H04L7/04 , H04L27/227 , H04L27/3818 , H04L2027/0016 , H04L2027/0024
摘要： The multi-channel signal processing device includes a multi-channel continuous waveform (CW) phase shifter module configured to generate phase control and filter interference therein for multiple local oscillator (LO) signals at a same frequency, a multi-channel up-converter module configured to up-convert the multiple LO signals to a desired frequency and filter respective image signals therein, and a multi-channel wideband mixer module configured to receive and mix the up-converted LO signals at the desired frequency from the multi-channel up-converter module with radio frequency (RF) signals.

4. 发明授权

US09602242B2 Coherent reception with noisy channel state information 有权
公开(公告)号：US09602242B2
公开(公告)日：2017-03-21
申请号：US14300673
申请日：2014-06-10
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Ali S. Khayrallah , Jung-Fu Cheng
IPC分类号： H03D1/00 , H04L1/00 , H04L27/38 , H04L25/03
CPC分类号： H04L1/0054 , H04L25/03318 , H04L27/3818
摘要： Systems and methods for improved coherent demodulation that account for variation of an effective channel estimation error with transmitted symbols are provided. In one embodiment, a wireless node includes a receiver front-end, a channel estimator, and a soft-value processor. The receiver front-end is adapted to output samples of a received signal. The channel estimator is adapted to estimate a channel between a transmitter of the received signal and the wireless node based on the samples of the received signal. The soft-value processor is adapted to process the samples of the received signal according to a soft-value generation scheme that accounts for variation of an effective channel estimation error with transmitted symbols to thereby provide corresponding soft values. By accounting for the variation of the effective channel estimation error with transmitted symbols, the soft-value processor provides improved performance, particularly in a low Signal-to-Noise Ratio (SNR) scenario.

5. 发明申请

US20160112143A1 BLIND EQUALIZATION OF DUAL SUBCARRIER OFDM SIGNALS 有权
标题翻译：双重SUBCARRIER OFDM信号的盲均衡
公开(公告)号：US20160112143A1
公开(公告)日：2016-04-21
申请号：US14829583
申请日：2015-08-18
申请人： ZTE Corporation
发明人： Jianjun Yu , Fan Li
IPC分类号： H04B10/61 , H04J14/06 , H04L1/00 , H04L27/38 , H04L25/03
CPC分类号： H04B10/6164 , H04B10/612 , H04B10/6165 , H04J14/06 , H04L1/0054 , H04L25/03019 , H04L27/2601 , H04L27/2647 , H04L27/2697 , H04L27/34 , H04L27/3422 , H04L27/362 , H04L27/3818 , H04L27/3827 , H04L2025/03414 , H04L2025/0342 , H04L2025/03675 , H04L2027/003 , H04L2027/0038
摘要： A dual-polarization, 2-subcarriers code orthogonal, orthogonal frequency division multiplexed signal carrying information bits is transmitted in an optical communication network without transmitting a corresponding pilot tone or training sequence. A receiver receives the transmitted signal and recovers information bits using a blind equalization technique and by equalizing the 2-subcarriers OFDM signal as a 9-QAM signal in time domain with a CMMA (constant multi modulus algorithm) equalization method.
摘要翻译：在光通信网络中发送双极化2子载波码正交正交频分复用信号携带信息比特，而不发送相应的导频音或训练序列。接收机接收发送的信号，并使用盲均衡技术恢复信息比特，并且通过使用CMMA（恒定多模算法）均衡方法在时域中均衡2子载波OFDM信号作为9-QAM信号。

6. 发明授权

US09270513B2 Method and apparatus for algorithm on flexible square-QAM coherent detection 有权
标题翻译：用于灵活平方QAM相干检测算法的方法和装置
公开(公告)号：US09270513B2
公开(公告)日：2016-02-23
申请号：US14165127
申请日：2014-01-27
申请人： ZTE (USA) INC.
发明人： Jianjun Yu , Bo Huang
IPC分类号： H03H7/30 , H04L27/38 , H04L25/03
CPC分类号： H04L27/3818 , H04L25/03038 , H04L2025/03617
摘要： In Software defined elastic optical networks, modulation format and constellation size may be flexibly modified. As a result, digital signal processing (DSP) algorithm should be compatible with different modulation schemes or readily reconfigurable at the optical coherent receiver. Therefore we propose a novel cascaded adaptive blind equalizers based on decision-directed modified least mean square (DD-MLMS) algorithm for polarization separation and carrier phase recovery. The algorithm is square quadrature amplitude modulation (QAM) independent so that it could be applied in the elastic optical systems. The 28 Gbaud polarization multiplexing quadrature phase shift keying (PM-QPSK) and PM-16QAM back-to-back transmission is demonstrated. The results show that the performance is very close to the general algorithm but with a benefit of the reduced operation complexity. We transmit the 8×240 Gb/s PM-16QAM wavelength division multiplexing (WDM) signal over 1200 km standard single mode fiber (SSMF) based on the proposed blind equalization with a bit error ratio (BER) less than 2×10−2.
摘要翻译：在软件定义的弹性光网络中，可以灵活地修改调制格式和星座大小。因此，数字信号处理（DSP）算法应该与不同的调制方案兼容，或者在光学相干接收机处可以容易地重新配置。因此，我们提出了一种基于用于偏振分离和载波相位恢复的决策导向修正最小均方（DD-MLMS）算法的新颖级联自适应盲均衡器。该算法是平方正交幅度调制（QAM）独立的，因此可以应用于弹性光学系统中。展示了28 Gbaud偏振复用正交相移键控（PM-QPSK）和PM-16QAM背对背传输。结果表明，性能非常接近于一般算法，但具有降低的操作复杂度的优点。我们基于提出的盲均衡，以比特误码率（BER）小于2×10-2的速度，在1200km标准单模光纤（SSMF）上传输8×240Gb / s的PM-16QAM波分复用（WDM）信号。

7. 发明申请

US20160028577A1 RECEPTION OF 2-SUBCARRIERS COHERENT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED SIGNALS 有权
标题翻译： 2-SUBCARRIERS相邻正交频分多址信号的接收
公开(公告)号：US20160028577A1
公开(公告)日：2016-01-28
申请号：US14453471
申请日：2014-08-06
申请人： ZTE Corporation
发明人： Jianjun Yu , Fan Li
IPC分类号： H04L27/26 , H04B10/61 , H04B10/516 , H04L25/02 , H04L1/00
CPC分类号： H04L27/2659 , H04B10/5161 , H04B10/548 , H04B10/611 , H04B10/612 , H04B10/6164 , H04B10/6165 , H04L1/0054 , H04L25/0204 , H04L25/0305 , H04L25/03159 , H04L27/265 , H04L27/2697 , H04L27/2698 , H04L27/34 , H04L27/3422 , H04L27/3818
摘要： A dual-polarization, 2-subcarriers code orthogonal, orthogonal frequency division multiplexed signal carrying information bits is transmitted in an optical communication network without transmitting a corresponding pilot tone or training sequence. A receiver receives the transmitted signal and recovers information bits using a blind equalization technique and by equalizing the 2-subcarriers OFDM signal as a 9-QAM signal in time domain with a CMMA (constant multi modulus algorithm) equalization method.
摘要翻译：在光通信网络中发送双极化2子载波码正交正交频分复用信号携带信息比特，而不发送相应的导频音或训练序列。接收机接收发送的信号，并使用盲均衡技术恢复信息比特，并且通过使用CMMA（恒定多模算法）均衡方法在时域中均衡2子载波OFDM信号作为9-QAM信号。

8. 发明申请

US20150249509A2 METHOD AND APPARATUS FOR GENERATING A METRIC FOR USE IN ONE OR MORE OF LOCK DETECTION, SNR ESTIMATION, AND MODULATION CLASSIFICATION 有权
标题翻译：用于产生在一个或多个锁定检测中的公制的方法和装置，SNR估计和调制分类
公开(公告)号：US20150249509A2
公开(公告)日：2015-09-03
申请号：US13882780
申请日：2013-05-01
申请人： Yair Linn
发明人： Yair Linn
IPC分类号： H04B17/00
CPC分类号： H04L27/20 , H03D13/00 , H03J7/065 , H04B17/336 , H04B17/391 , H04L27/3818
摘要： The present disclosure is directed at a method and apparatus for generating a metric for use in any one or more of lock detection, SNR estimation, and modulation classification. To generate the metric, an input angle in the form of a symbol phase or a difference in symbol phases is used to evaluate a base function. The base function relates possible metrics to possible input angles using a triangle wave having its maxima or minima at ideal input angles, and the other of its maxima or minima at angles midway the ideal input angles. Described are embodiments that are one or more of non-data aided; that may be implemented relatively efficiently in hardware; that can function using one sample/symbol; that can achieve relatively good detection certainty using relatively few estimates; and that can be used to implement modulation classifiers, lock detectors, and SNR estimators that are resilient to imperfections in automatic gain control.
摘要翻译：本公开涉及用于生成用于锁定检测，SNR估计和调制分类中的任一个或多个的度量的方法和装置。为了产生度量，使用符号相位形式的输入角或符号相位的差异来评估基本函数。基本功能将可能的度量与使用其理想输入角度的最大值或最小值的三角波以及在理想输入角度的中间角度处的最大值或最小值中的另一个相关联的可能的输入角度。描述了作为非数据辅助的一个或多个的实施例; 这可以在硬件中相对有效地实现; 可以使用一个样本/符号来运行; 使用相对较少的估计可以获得相对较好的检测确定性; 并且可以用于实现对自动增益控制中的缺陷有弹性的调制分类器，锁定检测器和SNR估计器。

9. 发明申请

US20150188641A1 POWER-EFFICIENT MAXIMUM LIKELIHOOD DECODING FOR 5 BITS PER DUAL-POL-SYMBOL MODULATION 有权
标题翻译：功率有效的最大似然解码，用于每个双重符号调制的5位
公开(公告)号：US20150188641A1
公开(公告)日：2015-07-02
申请号：US14145296
申请日：2013-12-31
申请人： Infinera Corp.
发明人： Ahmed AWADALLA , Han Sun , Kuang-Tsan Wu
IPC分类号： H04B10/61 , H04L27/38
CPC分类号： H04B10/61 , H04B10/611 , H04B10/612 , H04L1/0054 , H04L25/067 , H04L27/3818
摘要： A digital signal processor (DSP), may identify symbol values associated with a 5 quadrature amplitude modulation (5QAM) signal. The DSP may determine a first bit set based on the symbol values and a first particular bit value. The DSP may determine a second bit set based on the symbol values and a second particular bit value. The DSP may compute a first distance based on the first bit set and the symbol values. The DSP may compute a second distance based on the second bit set and the symbol values. The DSP may determine that the first distance is less than the second distance. The first distance being less than the second distance may indicate that the first bit set is a correctly decoded bit set. The DSP may provide an output associated with the correctly decoded bit set.
摘要翻译：数字信号处理器（DSP）可以识别与5正交幅度调制（5QAM）信号相关联的符号值。 DSP可以基于符号值和第一特定比特值来确定第一比特集合。 DSP可以基于符号值和第二特定比特值来确定第二比特集合。 DSP可以基于第一位集合和符号值计算第一距离。 DSP可以基于第二位集合和符号值计算第二距离。 DSP可以确定第一距离小于第二距离。小于第二距离的第一距离可以指示第一位组是正确解码的位集合。 DSP可以提供与正确解码的位集相关联的输出。

10. 发明授权

US09059889B2 Polar multi-symbol delay detector for carrier phase and frequency recovery for coherent transmission 有权
标题翻译：用于相干传输的载波相位和频率恢复的极坐标多符号延迟检测器
公开(公告)号：US09059889B2
公开(公告)日：2015-06-16
申请号：US14203593
申请日：2014-03-11
申请人： Technion Research and Development Foundation LTD.
发明人： Moshe Nazarathy , Igor Tselniker , Alex Tolmachev
IPC分类号： H04L27/00 , H04L27/38 , H04L27/227 , H04L27/20 , H04B10/61 , H04B10/67
CPC分类号： H04L27/3872 , H04B10/61 , H04B10/611 , H04B10/6165 , H04B10/677 , H04L27/2071 , H04L27/227 , H04L27/38 , H04L27/3818 , H04L2027/0055 , H04L2027/0067 , H04L2203/00
摘要： A method for calculating a reconstructed phase that includes: Calculating a current phase signal and current amplitude signal that represent a phase and amplitude of a current input symbol, respectively. Generating, in response to the current phase signal and an estimate of a phase of a last input symbol that preceded the current input symbol, multiple partial references, some of which are responsive to (i) phase signals representative of phases of a plurality of input symbols that preceded the current input symbol, and (ii) estimates of the phase of the plurality of input symbols. Calculating unwrapped partial references. Estimating a constant carrier frequency offset (CFO) phase rotation in response to the unwrapped partial references. Calculating a reconstructed phase of the current input symbol in response to, at least, the estimate of the constant CFO phase rotation and to the unwrapped partial references.
摘要翻译：一种用于计算重构相位的方法，包括：分别计算表示当前输入符号的相位和幅度的当前相位信号和电流幅度信号。响应于当前相位信号和对当前输入符号之前的最后输入符号的相位的估计，产生多个部分参考，其中一些部分参考响应于（i）代表多个输入的相位的相位信号在当前输入符号之前的符号，以及（ii）多个输入符号的相位的估计。计算未打包的部分引用。响应于展开的部分参考，估计恒定的载波频率偏移（CFO）相位旋转。至少响应于常数CFO相位旋转和未展开的部分参考的估计，计算当前输入符号的重构相位。

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