公开(公告)号：US06894536B2

公开(公告)日：2005-05-17

申请号：US10013165

申请日：2001-12-10

申请人： Aaron K. Martin ,  Bryan K. Casper ,  Shekhar Y. Borkar ,  Stephen R. Mooney ,  Joseph T. Kennedy ,  Matthew B. Haycock ,  James E. Jaussi

发明人： Aaron K. Martin ,  Bryan K. Casper ,  Shekhar Y. Borkar ,  Stephen R. Mooney ,  Joseph T. Kennedy ,  Matthew B. Haycock ,  James E. Jaussi

IPC分类号： H04L25/493 ,  H03K19/0175

CPC分类号： H04L25/493

摘要： A digital interconnect system transmits pulses across a differential transmission line in response to transitions in an input data signal.

摘要翻译： 数字互连系统响应于输入数据信号中的转变，跨差分传输线传输脉冲。

公开(公告)号：US06882296B2

公开(公告)日：2005-04-19

申请号：US10701640

申请日：2003-11-06

申请人： John Knott

发明人： John Knott

IPC分类号： G11B20/10 ,  G11B20/14 ,  H04L25/493 ,  H03M1/36

CPC分类号： H04L25/493 ,  G11B20/10 ,  G11B20/14

摘要： A method of encoding a digital data stream which comprises providing a first stream of clock pulses at a first rate; deriving a second stream of clock pulses from the first stream at a second rate which is an integer sub-multiple of the first rate and less than the minimum bit rate in the data stream; monitoring the data stream for changes in level therein; counting pulses in the first stream starting with the occurrence of a pulse in the second stream; capturing the pulse count when a change in level in the data stream is detected or when the next pulse in the second stream of clock pulses occurs; and upon the occurrence of this pulse in the second stream producing a time domain descriptor of the data by combining the count obtained with information as to the direction of the change in level in the data input stream.

摘要翻译： 一种对数字数据流进行编码的方法，包括以第一速率提供第一时钟脉冲流; 以第二速率从第一流导出第二时钟脉冲流，第二速率是第一速率的整数倍，并且小于数据流中的最小比特率; 监测数据流中其水平的变化; 从第二流中出现脉冲开始计数第一流中的脉冲; 当检测到数据流中的电平变化时，或当第二时钟脉冲流中的下一个脉冲发生时，捕获脉冲数; 并且在第二流中出现该脉冲时，通过将获得的计数与关于数据输入流中的电平变化的方向的信息组合来产生数据的时域描述符。

公开(公告)号：US20050071713A1

公开(公告)日：2005-03-31

申请号：US10671164

申请日：2003-09-25

申请人： Suzanne Vining

发明人： Suzanne Vining

IPC分类号： G06K5/04 ,  G11B5/00 ,  G11B20/20 ,  H03M5/06 ,  H04L25/40 ,  H04L25/493

CPC分类号： H03M5/06

摘要： The present invention facilitates data recovery without requiring selection of a sample phase. The data is recovered by sampling a received signal to obtain a number of samples at a number of phases over a given time period referred to as a bit time. The samples are analyzed to determine if a transition has occurred in one or more consecutive phases. Such a transition is also referred to as a data toggle. Generally, one or more toggles in a single bit time indicate one data value (e.g., a zero) whereas no transitions indicate another data value (e.g., a one).

摘要翻译： 本发明便于数据恢复而不需要选择样本相。 通过对接收到的信号进行采样来恢复数据，以在被称为位时间的给定时间段内以多个相位获得多个样本。 分析样品以确定在一个或多个连续相中是否发生了转变。 这种转变也被称为数据切换。 通常，单个位时间中的一个或多个切换指示一个数据值（例如，零），而没有转换指示另一个数据值（例如，一个）。

公开(公告)号：US06873642B1

公开(公告)日：2005-03-29

申请号：US09830516

申请日：1999-10-13

申请人： Wolfgang Fey ,  Ling Chen

发明人： Wolfgang Fey ,  Ling Chen

IPC分类号： B60T8/00 ,  H03M5/08 ,  H04L25/06 ,  H04L25/48 ,  H04L25/49 ,  H04L25/493 ,  H03D1/00

CPC分类号： H04L25/493 ,  H04L25/069

摘要： The present invention relates to a method for conditioning a received signal that transmits coded data, wherein the coding of the data includes a defined coding clock pulse and the signal includes edges produced in accordance with the coding clock pulse, wherein from the received signal a time constant (tm) set in accordance with the coding clock pulse is determined, a first signal part which has a first edge is conditioned at a first time that is set in accordance with the time constant (tm) or in a first time window that is set in accordance with the time constant (tm), and a second signal part which has a second edge is conditioned at a second time that is set in accordance with the time constant (tm) and in dependence on the time of the first edge or in a second time window that is set in accordance with the time constant (tm) and in dependence on the time of the first edge.

摘要翻译： 本发明涉及一种用于调节发送编码数据的接收信号的方法，其中数据的编码包括定义的编码时钟脉冲，并且该信号包括根据编码时钟脉冲产生的边缘，其中从接收信号中的时间 确定根据编码时钟脉冲设定的常数（tm），具有第一边缘的第一信号部分在根据时间常数（tm）设置的第一时间被调节，或者在第一时间窗口 根据时间常数（tm）设置，并且具有第二边缘的第二信号部分在根据时间常数（tm）设置的第二时间和根据第一边缘的时间或 在根据时间常数（tm）设定的第二时间窗口中，并且依赖于第一边缘的时间。

公开(公告)号：US20050025252A1

公开(公告)日：2005-02-03

申请号：US10629325

申请日：2003-07-28

申请人： Larry Tate ,  Timothy Wig

发明人： Larry Tate ,  Timothy Wig

IPC分类号： H04L7/00 ,  H04L25/08 ,  H04L25/493 ,  H04B3/00

CPC分类号： H04L25/493 ,  H04L7/0008 ,  H04L25/085

摘要： At least two sequences of predetermined reference times are established on respective ones of at least two communication lines. At least some of the reference times of at least one of the sequences occur out-of-phase with at least some of the reference times of another of the sequences. Digital data is encoded onto data signals on one or more communication lines such that a time difference between at least one of the data signals and the nearest one of the reference times on one of the communication lines is smaller than the time difference between the same data signal and the nearest one of the reference times on another one of the communication lines.

摘要翻译： 在至少两条通信线路的相应的一个上建立预定参考时间的至少两个序列。 至少一个序列的至少一些参考时间与另一个序列的至少一些参考时间发生在异相之外。 数字数据被编码到一个或多个通信线路上的数据信号上，使得至少一个数据信号与一个通信线上的最接近参考时间之间的时间差小于相同数据之间的时间差 信号和另一个通信线路上最接近的一个参考时间。

公开(公告)号：US5982514A

公开(公告)日：1999-11-09

申请号：US088104

申请日：1998-06-01

申请人： Takahiro Suzuki ,  Noboru Kanzaki ,  Takashi Yoshida ,  Kenji Asanuma ,  Eiichi Nabeta

发明人： Takahiro Suzuki ,  Noboru Kanzaki ,  Takashi Yoshida ,  Kenji Asanuma ,  Eiichi Nabeta

IPC分类号： H04B10/152 ,  H04B10/155 ,  H04B10/24 ,  H04L25/493 ,  H04B10/08

CPC分类号： H04L25/493 ,  H04B10/40 ,  H04B10/502 ,  H04B10/508 ,  H04B10/541 ,  H04B10/564 ,  H04B10/676

摘要： An optical-signal/electric-signal converting device communications system for a communications system that establishes communications using electric and optical signals. The converting device converts an electric transmission signal into an optical transmission signal and an optical transmission signal into an electric transmission signal. The converting device includes an electric signal receiving circuit for receiving the electric transmission signal transmitted from the host computer of the communications system through an electric transmission line, and a modulating circuit for modulating the electric signal sent from the electric signal receiving circuit into a pulse signal having pulses of a smaller width. The converting device also includes an optical signal receiving circuit for receiving the optical transmission signal from the optical transmission line of the system and converting the received signal into an electric signal using a light-receiving element, and a demodulation circuit for demodulating the electric signal received from the optical signal receiving circuit into a pulse signal having pulses of a larger width.

摘要翻译： 一种用于建立使用电和光信号的通信的通信系统的光信号/电信号转换装置通信系统。 转换装置将电传输信号转换为光传输信号和光传输信号为电传输信号。 转换装置包括：电信号接收电路，用于通过电传输线路接收从通信系统的主计算机发送的电传输信号;以及调制电路，用于将从电信号接收电路发送的电信号调制成脉冲信号 具有较小宽度的脉冲。 转换装置还包括光信号接收电路，用于从系统的光传输线路接收光传输信号，并使用光接收元件将接收信号转换为电信号;以及解调电路，用于解调所接收的电信号 从光信号接收电路到具有较大宽度的脉冲的脉冲信号。

公开(公告)号：US5875292A

公开(公告)日：1999-02-23

申请号：US780297

申请日：1997-01-08

申请人： Masanori Taketsugu

发明人： Masanori Taketsugu

IPC分类号： H04L1/16 ,  H04L1/18 ,  H04L1/08 ,  H04L25/493

CPC分类号： H04L1/1809 ,  H04L1/16 ,  H04L1/1835 ,  H04L1/1874

摘要： To enable data transmission without transmitting packer's serial numbers, a transmit serial number is incremented by one at a transmit site each time a serial numberless data packet is sent to a receive site, and a copy of the transmitted packet is stored in a transmit memory corresponding to the transmit serial number. The process is repeated so that a predetermined number of outstanding packets are transmitted. At the receive site, a receive serial number is incremented by one upon receipt of each packet and the packet is stored in a receive memory corresponding to the receive serial number. The receive site determines whether there is an error in the outstanding packets in the receive memory. If an error is found, the receive site sends a request packet containing the serial number of the packet in error to the transmit site. In response, the transmit site sends a replacement copy for the corrupted packet to the receive site which, in response, replaces the packet in error with the received copy. If no packet in error is found in the receive memory, the receive site transmits an acknowledgment to the transmit site. On receiving it, the transmit site repeats the transmission of the next sequence of outstanding serial numberless packets.

摘要翻译： 为了在不发送封隔器的序列号的情况下进行数据传输，每当向接收站点发送无序列号的数据分组时，发送序列号在发送站点增加1，并且所发送的分组的副本被存储在相应的发送存储器中 发送序列号。 重复该过程，以便发送预定数量的未完成分组。 在接收站点，接收序列号在接收到每个分组时递增1，并且分组被存储在与接收序列号对应的接收存储器中。 接收站点确定接收存储器中未完成的数据包是否有错误。 如果发现错误，接收站点将包含错误数据包的序列号的请求数据包发送到发送站点。 作为响应，发送站点将用于损坏的分组的替换副本发送到接收站点，作为响应，该接收站点与接收的副本错误地替换该分组。 如果在接收存储器中没有发现错误的分组，则接收站点向发送站点发送确认。 发送站点在接收到该数据时，会重复发送未完成的序列号无数据包的下一个序列。

公开(公告)号：US5712871A

公开(公告)日：1998-01-27

申请号：US498744

申请日：1995-07-06

申请人： Chen-Yi Chang

发明人： Chen-Yi Chang

IPC分类号： H03K7/04 ,  H04B1/707 ,  H04B14/02 ,  H04J13/00 ,  H04L25/49 ,  H04L25/493 ,  H04B15/00

CPC分类号： H04L25/493 ,  H03K7/04 ,  H04B1/707 ,  H04B14/026 ,  H04J13/00 ,  H04L25/4902 ,  H04J13/0003

摘要： A BPSK-MPP-DS-CDMA system is devised based on an M-ary pulse position modulated spreading-sequence signal. Under same bandwidth, same amount of energy used for one decision, and same bit error rate comparison conditions, if the number of users is less than the number N.sub.u of available sequence signals in the spreading sequence signal set {S.sub.p (t)} used in the BPSK-MPP-DS-CDMA system, the multiple access capacities of the BPSK-MPP-DS-CDMA system according to the present invention for M=4, M=8, and M=16 are improved by factors of at least 1.335, 1.66, and 1.65 over conventional BPSK-DS-CDMA systems. On the other hand, if the number of users reaches N.sub.u, the multiple access capacity can not be increased futher, however, the bit error rate of the system still be reduced. Furthermore, significant amount of transmission energy is saved.

摘要翻译： 基于M元脉冲位置调制扩展序列信号设计BPSK-MPP-DS-CDMA系统。 在相同的带宽下，对于一个决定使用相同的能量量，以及相同的比特错误率比较条件，如果用户数小于在扩展序列信号集{Sp（t）}中使用的可用序列信号的数量Nu BPSK-MPP-DS-CDMA系统，根据本发明的用于M = 4，M = 8和M = 16的BPSK-MPP-DS-CDMA系统的多址容量由至少为1.335 ，1.66和1.65，超过常规的BPSK-DS-CDMA系统。 另一方面，如果用户数达到Nu，则多址访问容量不能再增加，但是系统的误码率仍然降低。 此外，节省了大量的传输能量。

公开(公告)号：US5619686A

公开(公告)日：1997-04-08

申请号：US154744

申请日：1993-11-18

申请人： Allan Lin ,  Jay Deng

发明人： Allan Lin ,  Jay Deng

IPC分类号： H03L7/099 ,  H04L7/00 ,  H04L7/033 ,  H04L25/493 ,  H04L25/52 ,  G06F1/06

CPC分类号： H04L7/0091 ,  H04L25/493 ,  H03L7/0995 ,  H04L7/0008

摘要： A data source circuit and a complementary data acquisition circuit which can transmit and receive data at a higher rate than a conventional data source circuit which uses similar fabrication technology. A data source circuit of the present invention has an input for receiving a periodic source clock signal having a period T; a synchronization signal generator for generating, based on said downstream-clock signal, a series of one or more periodic synchronization signals having periods substantially equal to T, each synchronization signal being delayed from a previous synchronization signal; and a transmitter for transmitting one or more sub-words of a multi-bit data word, each sub-word having one or more bits, separate ones of said one or more sub-words being transmitted responsive to separate progressively delayed combined pairs of said synchronization signals. In a preferred embodiment of the present invention particularly suited for use in a point to point (e.g. a ring-type) data network, an acquisition circuit and a source circuit are integrated as a receiver/retransmission node.

摘要翻译： 数据源电路和互补数据采集电路，其能够以比使用类似的制造技术的常规数据源电路更高的速率发送和接收数据。 本发明的数据源电路具有用于接收具有周期T的周期性源时钟信号的输入端; 同步信号发生器，用于基于所述下行时钟信号产生一系列具有基本上等于T的周期的周期性同步信号，每个同步信号从先前的同步信号延迟; 以及发送器，用于发送多比特数据字的一个或多个子字，每个子字具有一个或多个比特，所述一个或多个子字中的不同的子字响应于分离的逐渐延迟的所述组合对而被发送 同步信号 在特别适用于点对点（例如环型）数据网络的本发明的优选实施例中，采集电路和源电路被集成为接收机/重传节点。

公开(公告)号：US5438590A

公开(公告)日：1995-08-01

申请号：US065292

申请日：1993-05-24

申请人： Shimon Tzukerman ,  James N. Esserman

发明人： Shimon Tzukerman ,  James N. Esserman

IPC分类号： H04N7/26 ,  H03M13/23 ,  H04B7/15 ,  H04J3/22 ,  H04L1/00 ,  H04L25/493 ,  H04L27/18 ,  H04M11/06 ,  H04N7/08 ,  H04N7/20 ,  H04N7/66 ,  H04L27/00

CPC分类号： H04L1/0065 ,  H03M13/23 ,  H04J3/22 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0059 ,  H04L1/0069 ,  H04L1/0071 ,  H04M11/068 ,  H04N7/0806

摘要： Digital data are communicated from a transmitter to a terrestrial receiver by encoding the data into first and second 1/2 rate convolutional encoded signals during different periods. During the different periods, the convolutional signals are encoded into first and second forward error correction convolutional encoded signals having 2/3 and 6/7 punctured codes transmitted to the receiver via a satellite. Power emitted from the satellite during the first period is 3 db lower than that emitted during the second period. An antenna dish having a diameter no greater than about 1 meter is at the receiver responsive to both signals emitted from the satellite. The encoded signals include sequential bits P.sub.1 (0), P.sub.1 (1), etc. and P.sub.2 (0), P.sub.2 (1), etc. At the 2/3 rate, parallel punctured bit streams respectively including sequential bits P.sub.1 (0), P.sub.2 (1), P.sub.2 (2), P.sub.1 (4) and P.sub.2 (0), P.sub.1 (2), P.sub.2 (3), P.sub.2 (4) are derived. At the 6/7 rate, the punctured bit streams are respectively P.sub.1 (0), P.sub.2 (1), P.sub.1 (3), P.sub.1 (5), P.sub.2 (6), P.sub.2 (8), P.sub.2 (10) and P.sub.2 (0), P.sub.2 (2), P.sub.2 (4), P.sub.1 (6), P.sub.2 (7), P.sub.1 (9), P.sub.1 (11). Simultaneously derived bits of the parallel punctured bit streams simultaneously QPSK modulate a carrier. A punctured clock is combined with the serial signal to derive a pair of wavetrains G1 and G2 including the I and Q channel sequential bits and dummy bits inserted into the serial signal. The receiver responds to the QPSK carrier to derive a serial signal having sequential bits so channel I and Q sequential bits I(0), I(1), I(2) etc. and Q(0), Q(1), Q(2) etc. at the same time slots t.sub.k, t.sub.k+1, t.sub.k+2 are sequentially derived as I(0), Q(0), I(1), Q(1), I( 2), Q(2) etc.

摘要翻译： 通过在不同时段期间将数据编码为第一和第二1/2速率卷积编码信号，将数字数据从发射机传送到地面接收机。 在不同的时间段期间，卷积信号被编码成具有经由卫星发送到接收机的2/3和6/7个穿孔码的第一和第二前向纠错卷积编码信号。 在第一期间从卫星发射的功率比第二时期发射的功率低3分贝。 直径不大于约1米的天线盘在接收机处响应从卫星发出的两个信号。 编码信号包括顺序位P1（0），P1（1）等以及P2（0），P2（1）等。在2/3速率下，分别包括顺序位P1（0） ，P2（1），P2（2），P1（4）和P2（0），P1（2），P2（3），P2（4）。 在6/7速率下，穿孔比特流分别为P1（0），P2（1），P1（3），P1（5），P2（6），P2（8），P2（10）和P2 0），P2（2），P2（4），P1（6），P2（7），P1（9），P1（11）。 并行穿孔比特流的同时导出比特同时QPSK调制载波。 将穿孔时钟与串行信号组合以得到包括插入到串行信号中的I和Q通道顺序位和虚拟位的一对绕组G1和G2。 接收机响应于QPSK载波​​以导出具有顺序位的串行信号，因此通道I和Q顺序位I（0），I（1），I（2）等和Q（0），Q（1），Q （0），Q（0），I（1），Q（1），I（2），Q（1），（3）中的相应时间间隔tk，tk + 1，tk + 2）等