公开(公告)号：US4644537A

公开(公告)日：1987-02-17

申请号：US685445

申请日：1984-12-24

Applicant: Richard D. Gitlin ,  Jean-Jacques Werner

Inventor： Richard D. Gitlin ,  Jean-Jacques Werner

IPC: H04B17/00 ,  H04L27/34 ,  H04L3/00

CPC classification number: H04L27/3472

Abstract: In a system for communicating primary and secondary data from a transmitter to a receiver, each of a first plurality of primary data word values is communicated by transmitting an individual channel symbol associated with that value, while at least one other primary data word value is communicated by transmitting a selected one of at least two other channel symbols associated with that one other value. The selected symbol is a function of the value of an individual secondary data word. In the receiver, both the primary and secondary data word values are recovered from the channel symbols thus transmitted.

Abstract translation: 在用于将主数据和次要数据从发送器传送到接收器的系统中，通过发送与该值相关联的单独信道符号来传送第一多个主数据字值中的每一个，同时传达至少一个其它主数据字值 通过发送与该另一个值相关联的至少两个其他信道符号中的所选择的一个。 所选择的符号是单个辅助数据字的值的函数。 在接收机中，主数据字和辅助数据字值都从这样发送的信道符号恢复。

公开(公告)号：US4924492A

公开(公告)日：1990-05-08

申请号：US171636

申请日：1988-03-22

Applicant: Richard D. Gitlin ,  Sailesh K. Rao ,  Jean-Jacques Werner ,  Nicholas Zervos

Inventor： Richard D. Gitlin ,  Sailesh K. Rao ,  Jean-Jacques Werner ,  Nicholas Zervos

IPC: H04L25/49 ,  H04L27/00 ,  H04L27/34 ,  H04M3/00 ,  H04M11/00

CPC classification number: H04L27/3438 ,  H04L25/4921

Abstract: In a telephone local loop transmission arrangement, data is communicated from the customer premises to the central office utilizing a multi-dimensional, passband signal illustratively at 480 kb/s and 1.544 Mb/s.

公开(公告)号：US09020059B1

公开(公告)日：2015-04-28

申请号：US14098173

申请日：2013-12-05

Applicant: Gabriel E. Arrobo ,  Richard D. Gitlin

Inventor： Gabriel E. Arrobo ,  Richard D. Gitlin

IPC: H04L1/02 ,  H04L27/26

CPC classification number: H04L1/02 ,  H04L1/22 ,  H04L5/0023 ,  H04L27/2634 ,  H04L27/2647

Abstract: The present invention provides a Diversity Coding—Orthogonal Frequency Division Multiplexing (DC-OFDM) system and method that applies diversity coding to OFDM-based systems and provides improved probability of successful reception at the receiver and transparent self-healing and fault-tolerance. Diversity coding is well suited for OFDM-based systems because of its spatial diversity nature (parallel links). DC-OFDM provides the best performance when the probability of link error is high or when a link (sub-channel) fails. Also, by implementing diversity coding in OFDM-based systems, a reliable communication can be provided that is quite tolerant of link failures, since data and protection lines are transmitted via multiple sub-channels.

Abstract translation: 本发明提供了对基于OFDM的系统应用分集编码的分集编码 - 正交频分复用（DC-OFDM）系统和方法，并且提供了在接收机处成功接收的改进概率，并且具有透明的自愈和容错能力。 分集编码由于其空间分集性质（并行链路）而非常适合基于OFDM的系统。 当链路错误的概率较高或链路（子信道）出现故障时，DC-OFDM提供最佳性能。 此外，通过在基于OFDM的系统中实现分集编码，可以提供非常容忍链路故障的可靠通信，因为数据和保护线路经由多个子信道发送。

公开(公告)号：US5600663A

公开(公告)日：1997-02-04

申请号：US340551

申请日：1994-11-16

Applicant: Ender Ayanoglu ,  Richard D. Gitlin ,  Thomas F. La Porta ,  Sanjoy Paul ,  Krishan K. Sabnani

Inventor： Ender Ayanoglu ,  Richard D. Gitlin ,  Thomas F. La Porta ,  Sanjoy Paul ,  Krishan K. Sabnani

IPC: G06F11/10 ,  H03M13/35 ,  H04L1/00 ,  H04L1/18 ,  H03M13/00

CPC classification number: H04L1/0009 ,  H03M13/35 ,  H04L1/0026 ,  H04L1/1671 ,  H04L1/1819

Abstract: A forward error correction system adaptively changes the number of parity bits, bytes or packets transmitted to a receiver, based on previous error patterns experienced recently in the reception of original and parity bits, bytes or packets by that receiver.

Abstract translation: 基于在接收原始和奇偶校验位，字节或分组中最近遇到的先前错误模式，前向纠错系统自适应地改变发送到接收机的奇偶校验位，字节或分组的数量。

公开(公告)号：US5570367A

公开(公告)日：1996-10-29

申请号：US282254

申请日：1994-07-29

Applicant: Ender Ayanoglu ,  Richard D. Gitlin ,  Thomas F. La Porta ,  Sanjoy Paul ,  Krishan K. Sabnani

Inventor： Ender Ayanoglu ,  Richard D. Gitlin ,  Thomas F. La Porta ,  Sanjoy Paul ,  Krishan K. Sabnani

IPC: H04L1/16 ,  H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04W28/04 ,  H04W36/08 ,  H04W36/12 ,  H04W74/06 ,  H04W76/04 ,  H04W88/16 ,  H04W92/02 ,  H04W92/10 ,  H04W92/20 ,  H04J3/16

CPC classification number: H04W76/04 ,  H04L1/1607 ,  H04L1/1685 ,  H04L1/1848 ,  H04W36/08 ,  H04W36/12 ,  H04W74/06 ,  H04W88/16 ,  H04W92/02 ,  H04W92/10 ,  H04W92/20

Abstract: A wireless communications system is arranged to provide data communications services, including error recovery, between at least one wireless end-user device and at least one one base station. The wireless end user device(s) receives(s) from the base station(s) unsolicited messages indicative of the status of data packets received by the base station(s). The wireless end-user device(s) transmit acknowledgement and request for retransmission messages only upon request, or when all the packets within a block of such packets have been received.

Abstract translation: 无线通信系统被布置成在至少一个无线终端用户设备和至少一个基站之间提供包括错误恢复的数据通信服务。 无线终端用户设备从基站接收指示由基站接收的数据分组的状态的非请求消息。 无线终端用户设备仅在请求时发送确认和请求重传消息，或者当已经接收到这种分组的块内的所有分组时。

公开(公告)号：US5278689A

公开(公告)日：1994-01-11

申请号：US22614

申请日：1993-02-19

Applicant: Richard D. Gitlin ,  Zygmunt Haas

Inventor： Richard D. Gitlin ,  Zygmunt Haas

IPC: H04J3/22 ,  H04J3/24 ,  H04J14/08 ,  H04L7/06 ,  H04L12/56 ,  H04Q11/00

CPC classification number: H04Q11/0001 ,  H04J3/22 ,  H04J3/247 ,  H04L49/3081 ,  H04L49/357 ,  H04L7/06 ,  H04J14/08 ,  H04L49/30 ,  H04Q11/0066

Abstract: Currently, with optical time division multiplexing, a switching node is operated at the peak transmission rate. For example, if the data transmission rate is 10 Gbps, the line cards in the switching circuit are also required to operate at this rate despite the fact that the switching node does not actually need to access the data at this rate. Thus, the electronics, which includes the line cards at the switching node, is expensive and less reliable than a low-speed design. In this invention the requirement of operating the switching node electronics at the high speed link bit rate is eliminated by encoding the packet header field at a lower rate than the information in the data field. As a result, the line cards need only operate at the lower header rate. This is possible because the switching node does not need to process the data portion of the packet, but only the header information. The high-speed data portion of the packet is not optically to electrically converted at the switching node, but it passes almost transparently through the switching node. The invention also discloses overlapping several logical networks on the same physical network.

Abstract translation: 目前，通过光时分复用，交换节点以峰值传输速率运行。 例如，如果数据传输速率为10Gbps，则切换电路中的线路卡还需要以该速率操作，尽管切换节点实际上不需要以该速率访问数据。 因此，包括开关节点处的线路卡的电子装置比低速设计昂贵且不太可靠。 在本发明中，通过以比数据字段中的信息更低的速率编码分组报头字段来消除以高速链路比特率操作交换节点电子设备的要求。 因此，线卡只需要在较低的标题速率下运行。 这是可能的，因为交换节点不需要处理分组的数据部分，而仅需要处理报头信息。 分组的高速数据部分在交换节点处不是光学地电转换，而是几乎透明地通过交换节点。 本发明还公开了在相同物理网络上重叠多个逻辑网络。

公开(公告)号：US5278681A

公开(公告)日：1994-01-11

申请号：US59867

申请日：1993-05-10

Applicant: Richard D. Gitlin ,  Richard V. Kollarits ,  John F. Ribera ,  Clark Woodworth

Inventor： Richard D. Gitlin ,  Richard V. Kollarits ,  John F. Ribera ,  Clark Woodworth

IPC: G02F1/13 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/13357 ,  G09G3/36 ,  H04N9/31 ,  H04N9/76

CPC classification number: H04N9/3108 ,  H04N9/3155 ,  H04N9/3164 ,  G02F2001/133622

Abstract: The advantages of both a color display and a high-resolution monochrome display are realized in a single display system by eliminating color filters from the display screen of the display system and illuminating the display screen with either colored light or white light to provide color or high-resolution monochrome capability, respectively. Simultaneous color and high-resolution monochrome capability is realized by illuminating predetermined portions of the display screen with only colored light while illuminating different portions of the display screen with only white light.

Abstract translation: 彩色显示器和高分辨率单色显示器的优点通过从显示系统的显示屏上消除滤色器并用彩色光或白光照亮显示屏来实现单显示系统，以提供颜色或高 分辨率单色能力。 通过仅用彩色光照亮显示屏的预定部分，同时仅用白光照亮显示屏的不同部分，实现同时色彩和高分辨率的单色能力。

公开(公告)号：US4615038A

公开(公告)日：1986-09-30

申请号：US617979

申请日：1984-06-06

Applicant: Tong L. Lim, deceased ,  by Keung-Yi P. Yu, executor ,  Richard D. Gitlin

Inventor： Tong L. Lim, deceased ,  by Keung-Yi P. Yu, executor ,  Richard D. Gitlin

IPC: H04L27/01 ,  H04B3/04

CPC classification number: H04L27/01

Abstract: Apparatus and a technique for equalizing non-linear distortion in a received modulated data signal by (1) forming tentative decisions as to the values of data symbols represented by the signal preferably using a receiver including a conventional linear equalizer, (2) constructing a replica of the non-linear distortion in response to the tentative decisions, and (3) forming a final decision as to the data symbol values in response to signals including the replica. If desired, the final decisions can also be stored and fed back to the processor which forms the replica, so that the replica is a joint function of past final decisions and future tentative decisions regarding the data symbols represented by the signal samples. The present invention provides increased accuracy by using tentative decisions rather than input samples to form the non-linear distortion replica.

Abstract translation: 一种用于通过以下步骤来均衡接收的调制数据信号中的非线性失真的装置和技术：（1）优选地使用包括常规线性均衡器的接收机来形成关于由信号表示的数据符号的值的暂定决定，（2）构建副本 的响应于暂定决定的非线性失真，以及（3）响应于包括副本的信号，形成关于数据符号值的最终决定。 如果需要，最终决定也可以被存储并反馈到形成副本的处理器，使得副本是关于由信号样本表示的数据符号的过去最终决定和将来的暂定决定的联合功能。 本发明通过使用暂定决定而不是输入样本来形成非线性失真副本来提供增加的精度。

公开(公告)号：US4412341A

公开(公告)日：1983-10-25

申请号：US322517

申请日：1981-11-18

Applicant: Allen Gersho ,  Edmond Y. Ho ,  Richard D. Gitlin ,  Victor B. Lawrence ,  Tong L. Lim

Inventor： Allen Gersho ,  Edmond Y. Ho ,  Richard D. Gitlin ,  Victor B. Lawrence ,  Tong L. Lim

IPC: H04L27/00 ,  H04B3/20 ,  H04B15/00 ,  H04L27/01 ,  H04B3/14

CPC classification number: H04L27/01 ,  H04B15/00

Abstract: Weighted sums of samples of an interference-corrupted data signal are generated to form phase-compensated, symbol-spaced samples. The interference-corrupted signal is at the same time subjected to conventional adaptive equalization and is otherwise processed so as to form tentative decisions as to the transmitted data. Cancellation signals representing the interference components of the phase-compensated samples are generated by forming respective weighted sums of the tentative decisions and each cancellation signal is combined with a respective phase-compensated sample to provide cancelled samples from which final data decisions are made. The weighting coefficients used to form the phase-compensated samples and the cancellation signals are adaptively updated in response to error signals derived from the difference between each cancelled sample and the corresponding final decision.

Abstract translation: 产生干扰损坏的数据信号的加权加权和，以形成相位补偿的符号间隔样本。 干扰损坏的信号同时经历常规的自适应均衡，并且被处理，以便形成关于发送的数据的暂定决定。 表示相位补偿样本的干扰分量的消除信号通过形成临时判定的各自的加权和来产生，并且将每个消除信号与相应的相位补偿样本组合，以提供取消的取样，从中作出最终的数据决定。 用于形成相位补偿采样的加权系数和消除信号根据从每个取消的采样与相应的最终决策之间的差异导出的误差信号自适应地更新。

公开(公告)号：US4245345A

公开(公告)日：1981-01-13

申请号：US75646

申请日：1979-09-14

Applicant: Richard D. Gitlin ,  Edmond Y. Ho ,  Howard C. Meadors, Jr. ,  Stephen B. Weinstein

Inventor： Richard D. Gitlin ,  Edmond Y. Ho ,  Howard C. Meadors, Jr. ,  Stephen B. Weinstein

IPC: H03H15/00 ,  H04B3/04 ,  H04L7/00 ,  H04L7/02 ,  H04L7/04 ,  H04L7/10 ,  H04L27/01

CPC classification number: H04L7/10 ,  H04L27/01 ,  H04L7/007 ,  H04L7/046

Abstract: In a multipoint data communication system using quadrature-amplitude modulation, a master modem (20) and a plurality of tributary modems (11a, 11b . . . 11n) are interconnected via respective transmission channels (13a, 13b . . . 13n, 16). Adaptive equalizer circuitry (55, 56) in the master modem equalizes the channel from a particular tributary by multiplying samples of signals received from the tributary by an ensemble of tap coefficients associated with the tributary. The tap coefficient ensembles for each tributary are stored in a memory (91) from which they are retrieved at the start of transmission from that tributary. Timing-acquisition circuitry (29) within the master modem adjusts the phase of the latter's sampling circuitry (23, 27) at the start of transmission from a given tributary so that the received signals are sampled at the correct time points. In particular, a timing acquisition signal having spectral components only within the non-rolloff region of the equalized baseband-equivalent transfer function is transmitted by the tributary. The master samples and equalizes the received timing acquisition signal to form a succession of timing acquisiton equalizer outputs. The time by which the operation of the sampling circuitry is to be advanced or retarded is determined as a trigonometric function of two successive ones of the timing acquisition equalizer outputs. The timing acquisition signal is illustratively a double-dotting pattern having a four-symbol-interval period. That period is integrally related to the carrier frequency. This allows the samples needed in order to begin forming the timing acquisition equalizer outputs to be generated by replicating the samples taken over only four symbol intervals.

Abstract translation: 在使用正交幅度调制的多点数据通信系统中，主调制解调器（20）和多个支路调制解调器（11a，11b，...，11n）经由各个传输信道（13a，13b，...，13n，16）互连， 。 主调制解调器中的自适应均衡器电路（55,56）通过将从支路接收的信号的采样乘以与支路相关联的抽头系数的整体来均衡来自特定支路的信道。 每个支流的抽头系数集合存储在从该支流的传输开始时从其中检索它们的存储器（91）中。 主调制解调器内的定时采集电路（29）在给定支路的发送开始时调整后者的采样电路（23,27）的相位，使得接收的信号在正确的时间点进行采样。 特别地，仅在均衡的基带等效传递函数的非滚降区域内具有频谱分量的定时获取信号由支流传输。 主机采样并均衡接收到的定时采集信号，形成一系列定时采集均衡器输出。 将采样电路的操作提前或延迟的时间确定为两个连续的定时获取均衡器输出的三角函数。 定时获取信号示例性地是具有四符号间隔周期的双点图案。 这个时期与载波频率是一体的。 这允许为了开始形成定时获取均衡器输出而需要的样本，通过复制仅在四个符号间隔所取的样本来产生。