公开(公告)号：US06625113B1

公开(公告)日：2003-09-23

申请号：US09386092

申请日：1999-08-30

申请人： Robert L. Cupo ,  Mohsen Sarraf ,  Mojtaba Shariat

发明人： Robert L. Cupo ,  Mohsen Sarraf ,  Mojtaba Shariat

IPC分类号： H04J1100

CPC分类号： H04L27/2655 ,  H04L7/007 ,  H04L27/2601 ,  H04L27/2607 ,  H04L27/2656

摘要： A receiver of digital information typically performs a frame synchronization finction to locate the beginning of a frame of within received information. Frame and interleaver synchronization functions are complex tasks to accomplish, and are made more so when transmitted information is subjected to harsh interference by the environment of the transmission media, e.g., wireless media. Such interference may be sufficiently minimized by filtering the band signal at the receiver in a simple manner to allow receiver processes to perform successfully frame synchronization and interleaver functions on the filtered signal, in which such filtering may be achieved using a simple bandpass filter. Although such filtering renders the received signal sufficiently clean to recover frame synchronization and interleaver signals, it nevertheless corrupts the information carried in the signal, thereby making it extremely difficult to recover the information. This problem is overcome by shifting the unfiltered received signal in the way used to shift the filtered signal to locate the beginning of a frame and thus recover the underlying information.

摘要翻译： 数字信息的接收机通常执行帧同步功能以定位接收的信息内的帧的开始。 帧和交织器同步功能是完成的复杂任务，并且当传输的信息受到诸如无线媒体之类的传输媒体的环境的苛刻干扰时更加如此。 通过以简单的方式对接收机处的频带信号进行滤波可以充分地减小这种干扰，以允许接收机处理在滤波信号上执行成功的帧同步和交织器功能，其中可以使用简单的带通滤波器来实现这种滤波。 虽然这种过滤使接收到的信号足够清洁以恢复帧同步和交织器信号，但是它仍然破坏信号中携带的信息，从而使得恢复信息非常困难。 通过以用于移位滤波信号的方式移位未滤波的接收信号来定位帧的开始并因此恢复基础信息来克服该问题。

公开(公告)号：US07359446B2

公开(公告)日：2008-04-15

申请号：US10639524

申请日：2003-08-13

申请人： Tongtong Li ,  Masoud Sajadieh ,  Mohsen Sarraf ,  Masood Yousefi ,  Robert L. Cupo ,  Thomas W. Goeddel

发明人： Tongtong Li ,  Masoud Sajadieh ,  Mohsen Sarraf ,  Masood Yousefi ,  Robert L. Cupo ,  Thomas W. Goeddel

IPC分类号： H04L23/02 ,  H03D1/00

CPC分类号： H04L1/0059 ,  H04L1/0054 ,  H04L1/0071 ,  H04L25/067

摘要： “Reliability-related” values are assigned to received signal samples containing noise and distortion. The samples are then sent to a Viterbi decoder in order to regenerate originally transmitted messages.

摘要翻译： “可靠性相关”值分配给包含噪声和失真的接收信号样本。 然后将样本发送到维特比解码器，以便重新生成最初发送的消息。

公开(公告)号：US09020026B2

公开(公告)日：2015-04-28

申请号：US12985564

申请日：2011-01-06

申请人： Robert L. Cupo

发明人： Robert L. Cupo

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H04B1/30 ,  H04L27/38

CPC分类号： H04B1/30 ,  H04L27/3863

摘要： A method and system for compensating for frequency dependent phase and amplitude imbalances is provided. A plurality of frequency sub-bands is extracted from a received wideband signal. Each of the plurality of frequency sub-bands is compensated to produce an associated plurality of compensated frequency sub-bands. The compensated sub-bands are summed in order to produce a compensated signal.

摘要翻译： 提供了一种用于补偿频率相关相位和幅度不平衡的方法和系统。 从接收的宽带信号中提取多个频率子带。 多个频率子带中的每一个被补偿以产生相关联的多个补偿的频率子带。 补偿的子带被相加以产生补偿信号。

公开(公告)号：US5162812A

公开(公告)日：1992-11-10

申请号：US776525

申请日：1991-10-11

申请人： Ahmad K. Aman ,  Robert L. Cupo ,  Nicholas A. Zervos

发明人： Ahmad K. Aman ,  Robert L. Cupo ,  Nicholas A. Zervos

IPC分类号： H04B3/06 ,  H04L25/03 ,  H04L25/497 ,  H04L27/34 ,  H04Q11/04

CPC分类号： H04L25/4975 ,  H04L25/03343 ,  H04L25/497 ,  H04L27/3438 ,  H04Q11/0471 ,  H04Q2213/033

摘要： In a telephone local loop transmission arrangement, data is communicated from the customer premises to the central office utilizing a multidimensional, passband signal illustratively at 480 kb/s. Specifically, the transmitted signal is encoded in a trellis code and precoded using a generalized partial response filter. The received signal is processed by a circuitry that implements a trellis decoding in combination with nonlinear filtering.

摘要翻译： 在电话本地环路传输装置中，使用多维通带信号，以480kb / s为例，将数据从客户驻地传送到中心局。 具体地，发送的信号被编码为网格码并且使用广义部分响应滤波器进行预编码。 所接收的信号由与非线性滤波相结合实现网格解码的电路来处理。

公开(公告)号：US20120177084A1

公开(公告)日：2012-07-12

申请号：US12985564

申请日：2011-01-06

申请人： Robert L. Cupo

发明人： Robert L. Cupo

IPC分类号： H04B1/00

CPC分类号： H04B1/30 ,  H04L27/3863

摘要： A method and system for compensating for frequency dependent phase and amplitude imbalances is provided. A plurality of frequency sub-bands is extracted from a received wideband signal. Each of the plurality of frequency sub-bands is compensated to produce an associated plurality of compensated frequency sub-bands. The compensated sub-bands are summed in order to produce a compensated signal.

摘要翻译： 提供了一种用于补偿频率相关相位和幅度不平衡的方法和系统。 从接收的宽带信号中提取多个频率子带。 多个频率子带中的每一个被补偿以产生相关联的多个补偿的频率子带。 将补偿的子带相加以产生补偿信号。

公开(公告)号：US5115452A

公开(公告)日：1992-05-19

申请号：US562050

申请日：1990-08-02

申请人： Robert L. Cupo

发明人： Robert L. Cupo

IPC分类号： H04L27/38 ,  H04L1/20 ,  H04L27/22

CPC分类号： H04L1/205

摘要： In a communications system, a transmitted signal is typically impaired by phase jitter attributed to power line harmonics and ringing voltages present in a communications channel. In order to properly recover the transmitted signal, the phase jitter in a received signal needs to be eliminated. To this end, an infinite-impulse-response (IIR) filter arrangement is employed in a receiver to estimate the phase jitter and is followed by a demodulator which substantially removes the jitter based on the estimate. The transfer function of this IIR filter arrangement is a function of the autocorrelation of a phase error, the latter being indicative of the difference between the phase jitter in the received signal and the jitter estimate.

摘要翻译： 在通信系统中，发送信号通常受到归因于通信信道中存在的电力线谐波和振铃电压的相位抖动的损害。 为了适当地恢复发送的信号，需要消除接收信号中的相位抖动。 为此，在接收机中采用无限脉冲响应（IIR）滤波器布置来估计相位抖动，并且其后面是基于估计基本上消除抖动的解调器。 该IIR滤波器装置的传递函数是相位误差的自相关函数的函数，后者表示接收信号中的相位抖动与抖动估计之间的差异。

公开(公告)号：US5163066A

公开(公告)日：1992-11-10

申请号：US705246

申请日：1991-05-24

申请人： Robert L. Cupo ,  Cecil W. Farrow

发明人： Robert L. Cupo ,  Cecil W. Farrow

IPC分类号： H04L7/02 ,  H04L25/03 ,  H04L25/14

CPC分类号： H04L7/0029 ,  H04L25/03038 ,  H04L25/14 ,  H04L7/0041

摘要： In a dual-duplex system wherein the communications channels have associated propagation delays which are typically different from one another, equalizers are connected to operate upon the signal received from each channel. To synchronize the operation of these equalizers to each other, the coefficients of each equalizer are updated when the training sequence is received from at least one of the communications channels. The sequence of symbol values in the training sequence may either be known or unknown to the receiver prior to transmission. When this sequence is detected, the coefficient updating circuit for each equalizer operates in response to a common reference signal. This reference signal includes a plurality of symbols and the value of each symbol is supplied at the same time to each equalizer coefficient updating circuit. This technique generates coefficients which compensate for propagation delay differences between the communications channels and is applicable to communications systems wherein data is distributed and transmitted through a plurality of communications channels.

摘要翻译： 在双工双工系统中，其中通信信道具有通常彼此不同的相关联的传播延迟，均衡器被连接以对从每个信道接收到的信号进行操作。 为了使这些均衡器的操作彼此同步，当从至少一个通信信道接收到训练序列时，更新每个均衡器的系数。 在发送之前，训练序列中的符号值的序列可以是接收器的已知或未知的。 当检测到该序列时，每个均衡器的系数更新电路响应于公共参考信号而工作。 该参考信号包括多个符号，并且每个符号的值同时被提供给每个均衡器系数更新电路。 该技术产生补偿通信信道之间的传播延迟差异的系数，并且可应用于通过多个通信信道分发和发送数据的通信系统。

公开(公告)号：US4847864A

公开(公告)日：1989-07-11

申请号：US209801

申请日：1988-06-22

申请人： Robert L. Cupo

发明人： Robert L. Cupo

IPC分类号： H04L27/38 ,  H03H15/00 ,  H03H17/04 ,  H03H21/00 ,  H04B3/04 ,  H04L27/01

CPC分类号： H04L27/01

摘要： A voice-band data symbol is typically impaired by so-called phase jitter prior to symbol being received at a data modem. Modem circuitry estimates the phase angle of the jitter and an infinite-impulse-response (IIR) filter adjusts to that phase angle so that the jitter can be corrected for by a demodulator circuit. Advantageously, the IIR filter is arranged so that its pair of complex, conjugate poles are initially positioned at a first predetermined radius within a unit circle. The angular displacement of the poles around the unit circle is adaptively increased in response to receipt of a series of such estimates until such displacement substantially equals the phase angle of the jitter. The poles are then positioned at a second predetermined radius to increase the gain of the filter.

公开(公告)号：US4843581A

公开(公告)日：1989-06-27

申请号：US48189

申请日：1987-05-11

申请人： Robert L. Cupo ,  Cecil W. Farrow

发明人： Robert L. Cupo ,  Cecil W. Farrow

IPC分类号： H03H17/06

CPC分类号： H03H17/06 ,  H03H2218/08

摘要： The computational processing power of a Digital Signal Processor (DSP) in linear-phase Finite Impulse Response Filter (FIR) applications is essentially doubled by taking advantage of either the even (symmetrical) or odd (antisymmetrical) symmetry of the response of such a filter.

摘要翻译： 通过利用这种滤波器的响应的均匀（对称）或奇数（反对称）对称性，线性相有限脉冲响应滤波器（FIR）应用中的数字信号处理器（DSP）的计算处理能力基本上是双倍的 。

公开(公告)号：US4815103A

公开(公告)日：1989-03-21

申请号：US113973

申请日：1987-10-29

申请人： Robert L. Cupo ,  Cecil W. Farrow

发明人： Robert L. Cupo ,  Cecil W. Farrow

IPC分类号： H04L7/02 ,  H04L25/03 ,  H04B3/04

CPC分类号： H04L7/0058 ,  H04L25/03044

摘要： In a data receiver employing a fractionally spaced equalizer, the phase with which samples of the received signal are formed is controlled in response to a signal indicative of the center of gravity of the equalizer coefficient.

摘要翻译： 在采用分数间隔均衡器的数据接收机中，响应于指示均衡器系数的重心的信号来控制形成接收信号的采样的相位。