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公开(公告)号：US20200218511A1
公开(公告)日：2020-07-09
申请号：US16732603
申请日：2020-01-02
Applicant: Cisco Technology, Inc.
IPC: G06F7/58 , G01R31/3177 , H03K3/84
Abstract: A random noise generator for generating a plurality of random noise samples per clock cycle, the noise samples having a distribution. The random noise generator comprises at least a first comparator unit and a second comparator unit, the first comparator unit configured to generate a first plurality of samples representing a high-probability part of the distribution and the second comparator unit configured to generate a second plurality of samples representing a low-probability part of the distribution; and a random selection unit connected to at least the first comparator unit and the second comparator unit. The random selection unit is configured to receive the first plurality of samples generated by the first comparator unit and the second plurality of samples generated by the second comparator unit, to output a random selection of samples from the first plurality of samples and the second plurality of samples.
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公开(公告)号：US20170117924A1
公开(公告)日：2017-04-27
申请号：US15397873
申请日：2017-01-04
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff , Stefan Langenbach , Norbert Beck
CPC classification number: H03M13/3746 , H03M13/1102 , H03M13/1111 , H03M13/258 , H03M13/2957 , H03M13/336 , H03M13/3715 , H03M13/3784 , H03M13/45 , H03M13/458 , H03M13/616 , H03M13/6325 , H03M13/6337 , H04L1/0045
Abstract: A forward error correction and differentially encoded signal obtained via a communication channel is supplied to a soft-input soft-output (SISO) differential decoder that is bi-directionally coupled to a SISO forward error correction decoder. Over a first portion of a plurality of decoding iterations of the differentially encoded signal, the SISO differential decoder and the SISO forward error correction decoder are operated in a turbo decoding mode in which decoded messages generated by the SISO differential decoder are supplied to the SISO forward error correction decoder and forward error correction messages are supplied to the differential decoder. Over a second portion of the plurality of decoding iterations of the differentially encoded signal, the SISO forward error correction decoder is operated in a non-turbo decoding mode without any messages passing to and from the SISO differential decoder. Decoder output is obtained from the SISO forward error correction decoder.
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公开(公告)号：US20150200731A1
公开(公告)日：2015-07-16
申请号：US14154674
申请日：2014-01-14
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff , Chris Fludger
CPC classification number: H04B10/6165 , H04L7/0075 , H04L7/048 , H04L2027/0067
Abstract: Presented herein are sub-sampled carrier phase recovery techniques. In accordance with one example, a plurality of consecutive symbols associated with a received optical signal is obtained. Carrier phase recovery of the optical signal is performed using one or more carrier phase estimation stages. At each of the one or more carrier phase estimation stages, a subset of the plurality of consecutive symbols is selected for use in carrier phase estimation. The subset of symbols selected for use in carrier phase estimation at each of the one or more stages comprises symbols that provide the most phase recovery information for each of the one or more stages.
Abstract translation: 这里呈现的是子采样载波相位恢复技术。 根据一个示例，获得与所接收的光信号相关联的多个连续符号。 使用一个或多个载波相位估计级执行光信号的载波相位恢复。 在一个或多个载波相位估计级中的每一个中，选择多个连续符号的子集用于载波相位估计。 被选择用于在一个或多个阶段中的每个阶段的载波相位估计中的符号子集包括为一个或多个阶段中的每一个提供最大相位恢复信息的符号。
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Patent Agency Ranking
14.发明授权公开(公告)号：US10078540B2
公开(公告)日：2018-09-18
申请号：US14304147
申请日：2014-06-13
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff , Stefan Langenbach
CPC classification number: G06F11/076 , H03M13/1105 , H03M13/612
Abstract: A device receives signals over a communication medium and uses a low density parity check decoder to decode data in the signals. A number of unsatisfied parity checks are counted prior to a first decoding iteration of the low density parity check decoder on a basis of log likelihood ratios computed from the signals. An operational characteristic of the low density parity check decoder is computed based on an accumulated number of unsatisfied parity checks.
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15.发明授权公开(公告)号：US10075186B2
公开(公告)日：2018-09-11
申请号：US14944674
申请日：2015-11-18
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff , Norbert Beck , Soeren Gehrke
CPC classification number: H03M13/23 , H03M13/235 , H03M13/3961 , H03M13/3988 , H03M13/4107 , H03M13/6502
Abstract: A method for encoding bits according to a convolutional code. Bits to be encoded with the convolutional code are obtained for transmission over a communication channel. The bits are encoded according to the convolutional code with an encoder having an M-bit memory and a plurality of logic gates so as to separate trellis segments of the convolutional code into trellis sub-segments having a reduced number of branches per state than that of the trellis segments.
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16.发明申请公开(公告)号：US20170141800A1
公开(公告)日：2017-05-18
申请号：US14944674
申请日：2015-11-18
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff , Norbert Beck , Soeren Gehrke
CPC classification number: H03M13/23 , H03M13/235 , H03M13/3961 , H03M13/3988 , H03M13/4107 , H03M13/6502
Abstract: A method for encoding bits according to a convolutional code. Bits to be encoded with the convolutional code are obtained for transmission over a communication channel. The bits are encoded according to the convolutional code with an encoder having an M-bit memory and a plurality of logic gates so as to separate trellis segments of the convolutional code into trellis sub-segments having a reduced number of branches per state than that of the trellis segments.
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公开(公告)号：US20170033888A1
公开(公告)日：2017-02-02
申请号：US15290346
申请日：2016-10-11
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff
CPC classification number: H04L1/007 , H03M13/23 , H03M13/256 , H03M13/258 , H03M13/353 , H04L1/0003 , H04L1/0016 , H04L1/0041 , H04L1/0044 , H04L1/005 , H04L1/0058 , H04L1/006 , H04L27/04 , H04L27/18 , H04L27/22 , H04L27/2332 , H04L27/362
Abstract: Techniques herein support enhanced multi-rate encoding and decoding of signals in multiple formats. In one embodiment, input data is received at a first device at one of a plurality of data rates. Encoder units are activated to produce streams of encoded input data. The encoder units are configured to operate at the same data rate. Differential encoding operations are performed to produce an encoded output stream. The encoded output stream is modulated for transmission to a second device. In another embodiment, a first device receives an encoded data stream that is transmitted from a second device. The modulated data stream includes encoded data at one of a plurality of data rates. Differential decoding is performed on the encoded data by activating one or more of a plurality of decoder units, where each of the plurality of decoder units is configured to operate at the same rate.
Abstract translation: 这里的技术支持多种格式的信号的增强的多速率编码和解码。 在一个实施例中，以多个数据速率中的一个以第一设备接收输入数据。 编码器单元被激活以产生编码输入数据流。 编码器单元配置为以相同的数据速率运行。 执行差分编码操作以产生编码的输出流。 编码的输出流被调制以传输到第二设备。 在另一实施例中，第一设备接收从第二设备发送的编码数据流。 调制数据流包括以多个数据速率之一的编码数据。 通过激活多个解码器单元中的一个或多个来对编码数据执行差分解码，其中多个解码器单元中的每一个被配置为以相同的速率操作。
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公开(公告)号：US09270384B2
公开(公告)日：2016-02-23
申请号：US14154674
申请日：2014-01-14
Applicant: Cisco Technology, Inc.
Inventor： Andreas Bisplinghoff , Chris Fludger
CPC classification number: H04B10/6165 , H04L7/0075 , H04L7/048 , H04L2027/0067
Abstract: Presented herein are sub-sampled carrier phase recovery techniques. In accordance with one example, a plurality of consecutive symbols associated with a received optical signal is obtained. Carrier phase recovery of the optical signal is performed using one or more carrier phase estimation stages. At each of the one or more carrier phase estimation stages, a subset of the plurality of consecutive symbols is selected for use in carrier phase estimation. The subset of symbols selected for use in carrier phase estimation at each of the one or more stages comprises symbols that provide the most phase recovery information for each of the one or more stages.
Abstract translation: 这里呈现的是子采样载波相位恢复技术。 根据一个示例，获得与所接收的光信号相关联的多个连续符号。 使用一个或多个载波相位估计级来执行光信号的载波相位恢复。 在一个或多个载波相位估计级中的每一个中，选择多个连续符号的子集用于载波相位估计。 被选择用于在一个或多个阶段中的每个阶段的载波相位估计中的符号子集包括为一个或多个阶段中的每一个提供最大相位恢复信息的符号。
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