公开(公告)号：US5504761A

公开(公告)日：1996-04-02

申请号：US222482

申请日：1994-04-05

Applicant: Masahiro Shinbashi ,  Junichi Ishiwatari

Inventor： Masahiro Shinbashi ,  Junichi Ishiwatari

IPC: H04L1/00 ,  H03M5/18 ,  H03M13/31 ,  H04L1/24 ,  H04L25/49 ,  H04L29/14 ,  G06F11/00

CPC classification number: H03M5/18 ,  H03M13/31 ,  H04L1/247 ,  H04L25/4925

Abstract: Error detection apparatus for a communications line includes an even/odd detection unit for detecting whether an even number of bipolar pulses or an odd number of bipolar pulses occur between a first pulse (violation pulse) interrupting an alternating pattern of bipolar pulses and a second pulse (violation pulse), and an output unit which determines that there is a line error in a target block defined by the first and second violation pulses when a detection result of the even/odd detection unit indicates an even number, wherein the first and second violation pulses occur in a code sequence in accordance with a predetermined coding scheme.

Abstract translation: 用于通信线路的错误检测装置包括偶数/奇数检测单元，用于检测在中断双极性脉冲的交替模式的第一脉冲（违反脉冲）和第二脉冲之间是否发生偶数个双极性脉冲或奇数个双极性脉冲 （违规脉冲），以及输出单元，当偶数/奇数检测单元的检测结果指示偶数时，确定在由第一和第二违反脉冲定义的目标块中存在线路误差，其中第一和第二 根据预定的编码方案，在码序列中出现违反脉冲。

公开(公告)号：US4006304A

公开(公告)日：1977-02-01

申请号：US639374

申请日：1975-12-10

Applicant: Darrell Dean Sell

Inventor： Darrell Dean Sell

IPC: H03M5/16 ,  H03K5/00 ,  H04L1/24 ,  H04L7/00 ,  H04L7/027 ,  H04L7/04 ,  H04L25/49

CPC classification number: H04L1/247 ,  H04L7/04 ,  H04L7/027

Abstract: An optical communication system is disclosed in which a bipolar signal of the type transmitted in digital transmission systems is converted into a unipolar binary signal for transmission over an optical transmission medium. The three levels of the bipolar signal are converted into three pairs of bits in the binary signal. One pair of bits is not utilized in the conversion and is therefore labeled as a forbidden word. Synchronization is achieved at the receiving location for the purpose of decoding by detecting the presence of the forbidden word in the binary signal and in response to this detection an energizing pulse is produced. This energizing pulse drives a clock circuit which in turn drives a decoding apparatus utilized to translate the binary signal back into the bipolar signal. As a result of this type of word synchronization, individual errors introduced into the binary signal do not result in a framing error.

Abstract translation: 公开了一种光通信系统，其中在数字传输系统中传输的类型的双极信号被转换成用于在光传输介质上传输的单极二进制信号。 双极信号的三个电平在二进制信号中被转换成三对位。 转换中没有使用一对位，因此被标记为禁止字。 为了通过检测二进制信号中的禁止字的存在而在接收位置实现同步，并且响应于该检测，产生通电脉冲。 该激励脉冲驱动时钟电路，该时钟电路又驱动用于将二进制信号转换回双极性信号的解码装置。 作为这种类型的字同步的结果，引入二进制信号的各个错误不会导致成帧错误。

公开(公告)号：US3906174A

公开(公告)日：1975-09-16

申请号：US41648073

申请日：1973-11-16

Applicant: GTE AUTOMATIC ELECTRIC LAB INC

Inventor： DOTTER JR BERTON E

IPC: H04L1/24 ,  H04B3/46

CPC classification number: H04L1/247 ,  H04L1/24

Abstract: A pseudo-random, pseudo-ternary pulse train, which is representative of a PCM signal, is applied to one end of a cable pair. At the other end of the cable pair, the received pulse train is equalized and amplified to obtain a pulse train output in which pulses have very nearly the same peak amplitude as each transmitted pulse, plus a characteristic which is similar but not identical. A variable amplitude interfering tone is combined with the equalized and amplified received pulse train. If no errors are determined by an error detector with a 0 amplitude interfering tone, the amplitude is increased until errors occur. The interfering amplitude control is calibrated in terms of eye degradation factor. The magnitude of the eye degradation factor is determinative of the capability of the cable pair to transmit the PCM signal with an acceptable error rate.

Abstract translation: 将代表PCM信号的伪随机，伪三元脉冲串应用于电缆对的一端。 在电缆对的另一端，所接收的脉冲串被均衡并被放大以获得脉冲串输出，其中脉冲具有与每个发射脉冲几乎相同的峰值振幅，加上类似但不相同的特性。 可变幅度干扰音与均衡和放大的接收脉冲串组合。 如果没有错误由具有0幅度干扰音的误差检测器确定，则振幅增加直到发生错误。 干扰幅度控制是根据眼睛退化因子进行校准的。 眼睛衰退因子的大小决定了电缆对以可接受的错误率传输PCM信号的能力。

公开(公告)号：US20160323056A1

公开(公告)日：2016-11-03

申请号：US15033400

申请日：2014-10-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chang Soon PARK ,  Young Jun HONG ,  Jinesh P NAIR ,  Joon Seong KANG ,  Young Soo KIM ,  Sujit JOS ,  Manoj CHOUDHARY

IPC: H04J13/16 ,  H04L25/49

CPC classification number: H04J13/16 ,  H04B1/0475 ,  H04B1/7097 ,  H04B2201/70707 ,  H04B2201/709709 ,  H04J13/0011 ,  H04J13/0022 ,  H04J13/0044 ,  H04J13/10 ,  H04J13/107 ,  H04L1/247 ,  H04L25/4923 ,  H04L27/04 ,  H04L27/233 ,  H04L27/2627 ,  H04L27/2692 ,  H04L27/36 ,  H04L27/38

Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements −1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.

Abstract translation: 公开了一种用于发送前置码序列的方法和装置。 根据实施例的发射机可以从包括元素-1,0和1的三进位序列序列中提取非相干接收机的第一序列和相干接收机的第二序列，并将第一序列和第二序列映射到 前导码包括多个位以产生非相干接收机和相干接收机支持的第三序列。

公开(公告)号：US06233225B1

公开(公告)日：2001-05-15

申请号：US09097789

申请日：1998-06-15

Applicant: David J. Antonello ,  David L. Carter ,  Nino Girardi ,  Robert J. Hofmann ,  Karl T. Koppany ,  Michael J. Lutz ,  Robert F. Merski

Inventor： David J. Antonello ,  David L. Carter ,  Nino Girardi ,  Robert J. Hofmann ,  Karl T. Koppany ,  Michael J. Lutz ,  Robert F. Merski

IPC: G01R3108

CPC classification number: H04L25/4925 ,  H04L1/247

Abstract: Line coding mismatches on a transmission channel in a telecommunications network will manifest a constant error signature having a certain number of errored seconds, severely errored seconds, unavailable time and lost sync. errors upon the application of a test pattern comprising a sequence of a first, second and third octet, each repeated a prescribed number of times. The first and second octets remain constant regardless of the nature of the transmission channel, while the nature of the third octet varies according to the transmission rate of the DS0 under test and associated DS1 under test. The test pattern will reveal a line coding mismatch. In a B8ZS environment (64 Kbps clear channel capability), the pattern may be run on any DS0 channel within the DS1. In an AMI-with-ZCS environment (56 Kbps or 64 Kbps restricted), the pattern must run on either channel 1 or 24.

Abstract translation: 电信网络中的传输信道上的线路编码不匹配将显示具有一定数量的错误秒，严重错误秒，不可用时间和丢失同步的恒定错误签名。 在应用包括第一，第二和第三八位字节的序列的测试图案时，每个重复规定次数的错误。 第一个和第二个八位字节保持不变，不管传输信道的性质如何，而第三个八位字节的性质根据正在测试的DS0的传输速率和相关的DS1而变化。 测试模式将显示线路编码不匹配。 在B8ZS环境（64 Kbps清除通道功能）中，模式可以在DS1中的任何DS0通道上运行。 在AMI-with-ZCS环境（限制56 Kbps或64 Kbps）的情况下，模式必须在通道1或24上运行。

公开(公告)号：US5099500A

公开(公告)日：1992-03-24

申请号：US257638

申请日：1988-10-14

Applicant: Darrell Furlong

Inventor： Darrell Furlong

IPC: H04L1/24 ,  H04L25/06

CPC classification number: H04L25/06 ,  H04L1/247

Abstract: A symbol detection and correction scheme for local area network modems, especially those which receive one of three symbols at any given time, such as those operating in accordance with the IEEE 802.4 standard. The invention significantly improves the bit error rate observed by the layer above the modem. The modem operates on a received signal with a pair of slicers. One slicer operating as a two-symbol detector, and a second slicer operates as a three-symbol detector. A receiver state machine is used to keep track of which portion of a frame is currently expected to be being received. Depending upon the particular context, one or both of the slicer outputs are used by the state machine to determine which of the three symbols was received. For example, when the receiver is in a state where only one of two data symbols are expected, and no control symbols are expected, only the two-symbol slicer output is used. The three-symbol slicer output, and logical combinations of the three-symbol slicer output and the two-symbol slicer output, are used as other times. The receiver state machine recognizes errors in pseduo-silence, start delimiter, and end-delimiter sequences without reporting such errors to the upper level, thereby greatly decreasing the error rate observed there.

Abstract translation: 用于局域网调制解调器的符号检测和校正方案，特别是在任何给定时间接收三个符号之一的符号检测和校正方案，例如根据IEEE 802.4标准操作的那些。 本发明显着提高了调制解调器上方的层所观察到的误码率。 调制解调器使用一对切片器对接收到的信号进行操作。 作为双符号检测器操作的一个限幅器，和第二限幅器作为三符号检测器操作。 接收机状态机用于跟踪当前预期正在接收帧的哪个部分。 根据特定的上下文，状态机使用一个或两个限幅器输出来确定三个符号中的哪一个被接收。 例如，当接收机处于仅期望两个数据符号之一并且不期望控制符号的状态时，仅使用双符号限幅器输出。 三符号限幅器输出以及三符号限幅器输出和双符号限幅器输出的逻辑组合被用作其他时间。 接收机状态机识别无声，起始分隔符和结束分隔符序列中的错误，而不向上层报告这样的错误，从而大大降低了在那里观察到的错误率。

公开(公告)号：US3840855A

公开(公告)日：1974-10-08

申请号：US37802273

申请日：1973-07-10

Applicant: CIT ALCATEL

Inventor： HEBERT F ,  AMEAU A ,  BOYER M

IPC: H04L1/24 ,  H04L25/04 ,  G06F11/00

CPC classification number: H04L1/247 ,  H04L25/03878

Abstract: An automatic selector for a data transmission line corrector selectively inserts a plurality of correctors in sequence in the line and measures the bipolarity errors associated with each corrector. The corrector which provides the least error is then connected to the line for purposes of that transmission.

公开(公告)号：US3061814A

公开(公告)日：1962-10-30

申请号：US7942660

申请日：1960-12-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： CRATER THEODORE V

IPC: H04L1/24 ,  H04L25/48

CPC classification number: H04L1/247

公开(公告)号：US09215063B2

公开(公告)日：2015-12-15

申请号：US14507702

申请日：2014-10-06

Applicant: QUALCOMM Incorporated

Inventor： George Alan Wiley ,  Chulkyu Lee

IPC: H04L7/04 ,  H04L1/20 ,  H04L1/24 ,  H04L25/49 ,  H04L25/02 ,  H04L5/20

CPC classification number: H04L7/042 ,  H04L1/205 ,  H04L1/206 ,  H04L1/247 ,  H04L5/20 ,  H04L25/0272 ,  H04L25/0282 ,  H04L25/0294 ,  H04L25/0298 ,  H04L25/4917

Abstract: System, methods and apparatus are described that facilitate tests and measurements related to multi-wire, multi-phase communications links. Information is transmitted in N-phase polarity encoded symbols and an eye pattern corresponding to the symbols may be generated such that the symbols are aligned with a trigger for each symbol that corresponds to a clock edge used to sample the symbols. The eye pattern may be used to determine sufficiency of setup times in the communication links and other such characteristics defining a communications channel capabilities.

Abstract translation: 描述了便于与多线，多相通信链路相关的测试和测量的系统，方法和装置。 信息以N相极性编码符号发送，并且可以生成与符号相对应的眼图，使得符号与对应于用于采样符号的时钟边缘的每个符号的触发对齐。 眼图可以用于确定通信链路中的建立时间的充分性以及定义通信信道能力的其它这样的特性。

公开(公告)号：USRE36862E

公开(公告)日：2000-09-12

申请号：US712487

申请日：1996-09-11

Applicant: Dev V. Gupta ,  Kyung-Yeop Hong

Inventor： Dev V. Gupta ,  Kyung-Yeop Hong

IPC: H04L1/24 ,  H03M5/12

CPC classification number: H04L1/247

Abstract: Loop Performance Monitoring (LPM) for DDS loops is described. Even though DDS loops have Intentional Bipolar Violations (BPVs), a Loop Coding Violations (LCVs) detection strategy based on further processing of BPVs is described. By monitoring LCVs a local loop terminating device can determine Bit Error Rate (BER).A system is described by which an Office Channel Unit (OCU) can process LCV information to determine signal quality of the signal over the incoming local loop. If the signal quality falls below a certain threshold, the OCU can cut the loop off from the DDS circuit and send control codes into the network.A system is also described where a Network Interface Unit (NIU) with the LPM system communicates incoming LCV information to the OCU using low speed signalling over the simplex path between the transmit and receive pairs. The OCU monitors incoming LCVs as well, and thus has the information necessary to determine bi-directional BER performance.

Abstract translation: 描述了DDS循环的循环性能监控（LPM）。 尽管DDS循环具有故意双极违例（BPV），但是描述了基于BPV进一步处理的循环编码违规（LCV）检测策略。 通过监视LCV，本地环路终端设备可以确定误码率（BER）。 描述了一种系统，通过该系统，Office信道单元（OCU）可以处理LCV信息以确定通过传入本地环路的信号的信号质量。 如果信号质量低于某个阈值，OCU可以从DDS电路中切断环路，并将控制码发送到网络中。 还描述了一种系统，其中具有LPM系统的网络接口单元（NIU）通过在发送和接收对之间的单工路径上的低速信令将输入的LCV信息传送到OCU。 OCU也监视输入的LCV，因此具有确定双向BER性能所需的信息。