-
1.发明授权Microprocessor including means for concurrently copying ALU results into selected operand register subsets and at least one main memory locations 失效微处理器包括用于同时将ALU结果复制到选择的操作数寄存器子集和至少一个主存储器位置的装置
公开(公告)号：US4615004A
公开(公告)日：1986-09-30
申请号：US681047
申请日：1984-12-13
CPC分类号： G06F9/30032 , G06F15/786
摘要： A microprocessor having a single common data bus (17) to which the output (33) of the arithmetic-logic unit (11) as well as input and output of the data memory (13) are connected without intermediate buffer registers. Of the working registers (21, 23, 25, 27) connected to the ALU inputs, one group (21, 23) is loaded from the common data bus and the other group (25, 27), used as accumulators, is directly loaded from the ALU output. Specific control circuitry (51, 53, 55, 57, 59, 61) allows selective storing of ALU output values into accumulators (25, 27), and simultaneous transfer with selective scaling into another register and into an addressed memory location within the same cycle during which the instruction was executed.
摘要翻译： 具有单个公共数据总线（17）的微处理器，算术逻辑单元（11）的输出（33）以及数据存储器（13）的输入和输出连接到其上，而没有中间缓冲寄存器。 在连接到ALU输入的工作寄存器（21,23,25,27）中，从公共数据总线加载一组（21,23），并且用作累加器的另一组（25,27）被直接加载 从ALU输出。 特定控制电路（51,53,55,57,59,61）允许将ALU输出值选择性地存储到累加器（25,27）中，并且通过选择性缩放同时传送到另一个寄存器并在同一周期内的寻址存储器位置 执行指令期间。
-
公开(公告)号：US4775988A
公开(公告)日：1988-10-04
申请号：US888598
申请日：1986-07-23
CPC分类号： H04L27/08 , H03G3/3068 , H03G3/3089
摘要： For adaptively adjusting the gain in a modem receiver comprising two amplifiers (15, 19), the following steps are performed: for a buffer (21), a Hilbert filter (23), and an equalizer (27), a respective energy indicator (P.sub.max.sup.2, u.sub.avg.sup.2, x.sub.avg.sup.2) is generated from the signal samples in the respective delay line. Each energy indicator is compared to an associataed upper target level (4L.sub.U, 3L.sub.P, 1.19 L.sub.X), and for the equalizer also to an associated lower target level (0.84 L.sub.X). If necessary, a gain correction factor (S) initially set to 1.0 is modified to obtain an overall gain that keeps delay line energies within desired targets. Target comparisons are made so that excess energy in the buffer or Hilbert filter result in a rapid gain reduction whereas average equilizer energy is used for slow adaptations. After a gain change, all acquired samples in the delay lines are also multiplied by the correction factor (S) so that none is lost during gain acquisition. Gain is distributed between the two amplifiers in a swapping operation without modifying the adjusted overall gain.
摘要翻译： 为了自适应地调整包括两个放大器（15,19）的调制解调器接收机的增益，执行以下步骤：对于缓冲器（21），希尔伯特滤波器（23）和均衡器（27），相应的能量指示器 Pmax2，uavg2，xavg2）从相应延迟线中的信号样本产生。 每个能量指示器与相关的上部目标水平（4LU，3LP，1.19 LX）进行比较，并且对于均衡器也与相关联的较低目标水平（0.84LX）进行比较。 如果需要，修改初始设置为1.0的增益校正因子（S）以获得将延迟线能量保持在期望目标内的总增益。 进行目标比较，使得缓冲器或希尔伯特滤波器中的过剩能量导致快速增益减小，而平均平衡能量用于缓慢适应。 在增益变化之后，延迟线中的所有获取样本也被乘以校正因子（S），使得在增益获取期间没有丢失。 在交换操作中，增益分布在两个放大器之间，而不改变调整后的总体增益。
-
3.发明授权Method and arrangement for detecting the presence of a training signal in a modem receiver 失效用于检测调制解调器接收机中训练信号的存在的方法和装置
公开(公告)号：US4674103A
公开(公告)日：1987-06-16
申请号：US888295
申请日：1986-07-22
CPC分类号： H04L27/01 , H04L27/066
摘要： For rapidly detecting a periodic training signal in a modem receiver, delay line storage (21) is provided for a signal section which is equal to one training signal period (q.multidot.M samples) plus an additional adjacent window (q.multidot.W samples). Thus, the stored signal section includes two windows (17', 19) which are offset by one training signal period and which are similar if a training signal is present. In evaluation means (41) connected to the two windows (17', 19), two auxiliary signals (z.sub.1, z.sub.2) are generated (61, 65) which represent the signal energy and the correlation, respectively, of the samples in the two windows. From the auxiliary signals, a dissimilarity metric (z.sub.3) is derived (69) and is compared (73) to a given threshold for generating an indicator signal (CYC) which becomes active when a training signal is present, i.e. when the two window contents are similar and the metric (z.sub.3) falls below the threshold. A carrier frequency offset estimate (.DELTA..sub.f) is also derived from the second auxiliary signal (z.sub.2).
摘要翻译： 为了快速检测调制解调器接收机中的周期性训练信号，为等于一个训练信号周期（q×M个样本）加上附加的相邻窗口（q×W个样本）的信号部分提供延迟线存储器（21）。 因此，存储的信号部分包括被一个训练信号周期偏移的两个窗口（17'，19），并且如果存在训练信号则这两个相似。 在连接到两个窗口（17'，19）的评估装置（41）中，生成两个辅助信号（z1，z2），分别表示两个样本中的信号能量和相关性 视窗。 从辅助信号中，导出不同度量（z3）（69）并与（73）比较（73）给定阈值，以产生当存在训练信号时变为有效的指示信号（CYC），即当两个窗口内容 是相似的，度量（z3）低于阈值。 还从第二辅助信号（z2）导出载波频率偏移估计（DELTA f）。
-
4.发明授权Method of transmitting binary data sequences and arrangement for enabling the rapid determination of the end of a transmitted binary data sequence 失效发送二进制数据序列的方法和用于能够快速确定所发送的二进制数据序列的结束的装置
公开(公告)号：US4447908A
公开(公告)日：1984-05-08
申请号：US327006
申请日：1981-12-03
CPC分类号： H04L5/16 , H04L1/0083 , H04L27/3433
摘要： A communication method and arrangement are disclosed which provide, for a trellis encoding process in the transmitter and a maximum-likelihood decoding process in the receiver, an additional fifth state (ZS) in addition to the usual four coding states (S0 . . . S3). The fifth state is entered in the transmitter at the end of transmission when a particularly selected escape symbol from a set of four escape symbols (E0 . . . E3) each associated to one of the four normal coding states is sent by an encoder supplement (15). In the receiver, a stop signal indicating end of transmission is only generated when, after the usual decoder delay, a path decoder (63) determines that an escape symbol was received, and a trellis decoder (61) indicates the fifth state (ZS) to be the most probable one. This enables rapid and secure determination of the end of a transmitted sequence without the need for additional transmission symbols or decoder cycles.
摘要翻译： 公开了一种通信方法和装置，其针对发射机中的网格编码处理和接收机中的最大似然解码处理，除了通常的四种编码状态之外还提供附加的第五状态（ZS）（S ... S3 ）。 当从四个正常编码状态之一相关联的一组四个转义符号（E0。。。E3）中特别选择的转义符号由编码器补充（发送）发送时，第五状态在发送结束时被输入到发送器中 15）。 在接收机中，仅当在通常的解码器延迟之后路径解码器（63）确定接收到转义符号时，才产生指示发送结束的停止信号，并且网格解码器（61）指示第五状态（ZS） 成为最可能的一个。 这使得能够快速和安全地确定发送序列的结束，而不需要额外的传输符号或解码器周期。
-
公开(公告)号：US08503540B2
公开(公告)日：2013-08-06
申请号：US13620468
申请日：2012-09-14
CPC分类号： H04L27/3416 , H03M13/253 , H04L1/0057 , H04L1/0065 , H04L27/36
摘要： A method and apparatus is disclosed to map a sequence of data to Quadrature Amplitude Modulation (QAM) constellation symbols. The method and apparatus encodes only a portion of the sequence of data and leaves a remaining portion of the sequence of data unencoded. The encoded portion of the sequence of data and the remaining unencoded portion of the sequence of data are then mapped into modulation symbols of the QAM constellation. The encoded portion of the sequence of data selects subsets of the QAM constellation, and the remaining unencoded portion of the sequence of data determines a specific modulation symbol within each subset of the QAM constellation.
摘要翻译： 公开了一种将数据序列映射到正交幅度调制（QAM）星座符号的方法和装置。 该方法和装置仅对该数据序列的一部分进行编码，并留下未被编码的数据序列的剩余部分。 然后将数据序列的编码部分和数据序列的剩余未编码部分映射到QAM星座图的调制符号中。 数据序列的编码部分选择QAM星座的子集，并且数据序列的剩余未编码部分确定QAM星座图的每个子集内的特定调制符号。
-
公开(公告)号：US08437366B2
公开(公告)日：2013-05-07
申请号：US13099760
申请日：2011-05-03
申请人： Gottfried Ungerboeck , Scott Powell
发明人： Gottfried Ungerboeck , Scott Powell
CPC分类号： H04L41/08 , H04L12/403
摘要： Certain aspects for the start-up procedure of transceivers supporting higher data rates over twisted-pair copper cabling are provided for 10 Gbit/sec Ethernet links (10GBASE-T). During a PMA (physical medium attachment) training period of the start-up procedure, long PMA training frames are exchanged periodically between link partners. A significant portion of each PMA training frame consists of known pseudo random sequences simultaneously transmitted over four wire pairs. PMA training frames include an InfoField for exchanging parameters and control information between link partners. For example, the InfoField's payload comprises fields for indicating current transmit power backoff (PBO), next PBO, requested PBO, transition count, control information, and for communicating precoder coefficients. Information in InfoFields is repeated and is not necessary that a link partner decodes every InfoField. For example, by occasionally reading the transition count, a link partner can determine when a change in transmit PBO and/or a state transition is to occur.
摘要翻译： 为10Gbit /秒以太网链路（10GBASE-T）提供了通过双绞铜缆布线支持更高数据速率的收发器的启动过程的某些方面。 在启动程序的PMA（物理介质附加）训练期间，长链PMA训练帧在链路伙伴之间定期交换。 每个PMA训练帧的重要部分由通过四个线对同时传输的已知伪随机序列组成。 PMA培训框架包括用于在链接伙伴之间交换参数和控制信息的InfoField。 例如，InfoField的有效载荷包括用于指示当前发送功率回退（PBO），下一个PBO，所请求的PBO，转移计数，控制信息以及用于传达预编码器系数的字段。 InfoFields中的信息被重复，链接伙伴不需要对每个InfoField进行解码。 例如，通过偶尔读取转换计数，链路伙伴可以确定何时发生传输PBO和/或状态转换的变化。
-
公开(公告)号：US07460595B2
公开(公告)日：2008-12-02
申请号：US11188301
申请日：2005-07-25
IPC分类号： H04B1/66
CPC分类号： H04L27/3405 , H03M7/40
摘要： In a communication system, Huffman coding techniques are used to obtain shaping gains for an improvement in data transmission rates. More particularly, a novel method of Huffman shaping is described that achieves a shaping gain of greater than 1 dB. The shaping gain results in a higher data rate transmission in a communication system where transmitted power is constrained.
摘要翻译： 在通信系统中，使用霍夫曼编码技术获得整形增益以提高数据传输速率。 更具体地，描述了一种实现霍夫曼整形的新方法，其实现了大于1dB的整形增益。 整形增益导致传输功率受限的通信系统中的较高数据速率传输。
-
公开(公告)号：US07457364B2
公开(公告)日：2008-11-25
申请号：US10909661
申请日：2004-08-02
申请人： Gottfried Ungerboeck
发明人： Gottfried Ungerboeck
IPC分类号： H04L27/00
CPC分类号： H04L25/03343 , H04L25/03038 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477
摘要： A method for modulating a sequence of data symbols such that the transmit signal exhibits spectral redundancy. Null symbols are inserted in the sequence of data symbols such that a specified pattern of K data symbols and N−K null symbols is formed in every period of N symbols in the modulated sequence, N and K being positive integers and K being smaller than N.
摘要翻译： 一种用于调制数据符号序列使得发送信号表现出频谱冗余的方法。 在数据符号序列中插入空符号，使得在调制序列中的N个符号的每个周期中形成K个数据符号和N-K个空符号的指定模式，N和K是正整数，K小于N.
-
9.发明申请Cancellation of interference in a communication system with application to S-CDMA 有权消除应用于S-CDMA的通信系统中的干扰公开(公告)号：US20050141460A9
公开(公告)日：2005-06-30
申请号：US10142189
申请日：2002-05-08
CPC分类号： H04B7/216 , H04B1/71 , H04B1/7102 , H04B1/7105 , H04B1/7107 , H04J13/0003 , H04J13/16
摘要： Cancellation of interference in a communication system with application to S-CDMA. A relatively straight-forward implemented, and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes are selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.
摘要翻译： 消除应用于S-CDMA的通信系统中的干扰。 使用选择预定数量的未使用代码的相对简单的实现和计算上有效的方法来在多址通信系统中选择性地与每个输入扩展信号执行加权线性组合。 如果需要，在每个实现中，预定数量的未使用代码总是相同的。 或者，使用在诸如CM和CMTS之间的通信系统的两端之间共享的知识，从重排序代码矩阵中选择预定数量的未使用代码。 虽然使用具有CM和CMTS的S-CDMA通信系统的上下文，但该解决方案通常适用于试图取消窄带干扰的任何通信系统。 还描述了几个实施例，其显示了解决方案在各种系统上的通用适用性。
-
10.发明授权Echo cancelling device providing adjustment of the echo canceller coefficients during full-duplex transmission 失效ECHO取消设备在全双工传输期间提供ECHO CANCELLER系统的调整
公开(公告)号：US5132963A
公开(公告)日：1992-07-21
申请号：US522333
申请日：1990-05-11
申请人： Gottfried Ungerboeck
发明人： Gottfried Ungerboeck
IPC分类号： H04B3/23
摘要： In the echo-cancelling device of the invention new decision-error directed algorithms are developed which permit to maintain adaptivity of the echo coefficients and perform precise tracking of the far-end echo phase in a computationally efficent manner during full-duplex operation. The echo-cancelling device comprises an adjust device (40) performing the minimization of the mean-square error obtained as the difference between the signal at the output of the equalizer (Z) and the data-symbol decision (a), for providing the adjustment of the near echo estimator (20) coefficients, of the far echo estimator (22) coefficients, and of the phase (26) of the estimated far echo.
-
-
-
-
-
-
-
-
-
搜索结果
70 条记录 (耗时 0.026 秒)
