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1. 发明授权

US4979184A Automatic equalizer initialization time control for multipoint networks 失效
标题翻译：多点网络的自动均衡器初始化时间控制
公开(公告)号：US4979184A
公开(公告)日：1990-12-18
申请号：US349252
申请日：1989-05-09
申请人： Stanley Bottoms , William L. Betts , Kenneth Martinez
发明人： Stanley Bottoms , William L. Betts , Kenneth Martinez
IPC分类号： H04L25/03
CPC分类号： H04L25/03019
摘要： An apparatus monitors the convergence of the equalization training sequence in a multipoint communication network. Various latches record the period of the incoming sequence and the time to convergence, if any. A counter records the number of periods free of convergence, and upon the counter exceeding a threshold, the network train time is doubled. A register records the longest required time to convergence. This value is periodically compared to the network train time, and, if less, substituted therefor.
摘要翻译：一种装置监视多点通信网络中的均衡训练序列的收敛。各种锁存器记录输入序列的周期和收敛时间（如果有的话）。计数器记录没有收敛的周期数，并且在计数器超过阈值时，网络训练时间加倍。寄存器记录收敛所需的最长时间。该值定期与网络训练时间进行比较，如果较少，则替换为该值。

2. 发明授权

US4534036A Phase tracking loop impairment monitor for modems 失效
标题翻译：调制解调器的相位跟踪循环损伤监视器
公开(公告)号：US4534036A
公开(公告)日：1985-08-06
申请号：US447989
申请日：1982-12-08
申请人： William L. Betts , Kenneth Martinez
发明人： William L. Betts , Kenneth Martinez
IPC分类号： H03L7/08
CPC分类号： H03L7/08
摘要： This invention provides a system which monitors the phase error signal generated by a phase tracking loop. The system includes a first circuit for averaging the phase error signal thus generating an uncorrected phase error, and a second signal for integrating the phase error to generate a corrected phase signal. The two generated signals are added together to yield a total phase error signal.
摘要翻译：本发明提供了一种监视由相位跟踪环路产生的相位误差信号的系统。该系统包括用于平均相位误差信号从而产生未校正的相位误差的第一电路和用于积分相位误差以产生校正的相位信号的第二信号。将两个产生的信号相加在一起以产生总相位误差信号。

3. 发明授权

US4752943A Frequency of occurrence retraining decision circuit 失效
标题翻译：发生频率再培训决策电路
公开(公告)号：US4752943A
公开(公告)日：1988-06-21
申请号：US83654
申请日：1987-08-07
申请人： Kenneth Martinez , William L. Betts
发明人： Kenneth Martinez , William L. Betts
IPC分类号： H04J3/14 , H04L27/38 , H04L7/06
CPC分类号： H04J3/14 , H04L27/38
摘要： In a system encompassing the transmission of high speed data over a communication channel, a circuit provides information as to whether the modems of the system are in synchronism. The circuit first determines the number of points being received within a given time at a certain inner location in the signal constellation and at another certain outer location in the signal constellation. The circuit includes an up/down counter which is incremented for each inner point received by the circuit and decremented for each outer point received. The counter output is conveyed to a comparator which determines whether the counter output has reached a preselected threshold. At the time that the counter output reaches the preselected threshold, the comparator outputs a signal which is indicative of the fact that the modems of the system are out of synchronism and retraining of the system is required.
摘要翻译：在包括通过通信信道传输高速数据的系统中，电路提供关于系统的调制解调器是否同步的信息。电路首先确定在信号星座中的某个内部位置和信号星座图中的另一个特定外部位置处在给定时间内正在接收的点数。该电路包括一个向上/向下计数器，该计数器对于由电路接收的每个内部点递增，并且对于接收到的每个外部点递减。计数器输出被传送到比较器，该比较器确定计数器输出是否已经达到预选阈值。在计数器输出达到预选阈值时，比较器输出一个指示系统调制解调器不同步并且需要系统再训练的信号。

4. 发明授权

US4677626A Self-synchronizing interleaver for trellis encoder used in wireline modems 失效
标题翻译：用于电缆调制解调器的网格编码器的自同步交织器
公开(公告)号：US4677626A
公开(公告)日：1987-06-30
申请号：US707085
申请日：1985-03-01
申请人： William L. Betts , Kenneth Martinez
发明人： William L. Betts , Kenneth Martinez
IPC分类号： H03M13/25 , H03M13/27 , H03M13/33 , H04L27/34 , G06F11/10 , H03M13/22
CPC分类号： H04L27/3427 , H03M13/25 , H03M13/27 , H03M13/33
摘要： In the transmitter of a data communication system using QAM, a trellis coder with k-baud delay units is used for forward error correction. The output of the encoder is modulated using QAM to generate sequential baud signal elements. The redundant data bits generated are distributed among several non-consecutive bauds. At the receiver a plurality of distributed convolutional decoders are utilized to decode the received signal element. The distributed trellis decoder is self-synchronizing.
摘要翻译：在使用QAM的数据通信系统的发射机中，具有k波特延迟单元的网格编码器用于前向纠错。使用QAM调制编码器的输出以产生顺序波特信号元件。生成的冗余数据位分布在多个非连续波特率之间。在接收机处，使用多个分布式卷积解码器对接收到的信号元素进行解码。分布式网格解码器是自同步的。

5. 发明授权

US4677624A Self-synchronizing de-interleaver for viterbi decoder used in wireline modems 失效
标题翻译：用于有线调制解调器的维特比解码器的自同步解交织器
公开(公告)号：US4677624A
公开(公告)日：1987-06-30
申请号：US707083
申请日：1985-03-01
申请人： William L. Betts , Kenneth Martinez
发明人： William L. Betts , Kenneth Martinez
IPC分类号： H04L1/00 , H04L27/34 , G06F11/10 , H03M13/22
CPC分类号： H04L1/0071 , H04L1/0054 , H04L1/0076 , H04L27/3427
摘要： In the transmitter of a data communication system using QAM, a plurality of trellis coders with delay units are used for forward error correction. The output of each encoder is modulated using QAM to generate sequential baud signal elements. The redundant data bits generated are distributed among several non-consecutive bauds. At the receiver a distributed convolutional decoder individually addressed having sectioned memory elements is utilized to decode the received signal element. The distributed trellis decoder is self-synchronizing.
摘要翻译：在使用QAM的数据通信系统的发射机中，具有延迟单元的多个网格编码器用于前向纠错。使用QAM调制每个编码器的输出，以产生顺序波特信号元件。生成的冗余数据位分布在多个非连续波特率之间。在接收机处，利用单独寻址的具有分段存储器元件的分布式卷积解码器对接收的信号元素进行解码。分布式网格解码器是自同步的。

6. 发明授权

US4534026A Normalized error compensator for modems using radial amplitude modulation for multiplexing 失效
标题翻译：使用径向幅度调制进行复用的调制解调器的归一化误差补偿器
公开(公告)号：US4534026A
公开(公告)日：1985-08-06
申请号：US558610
申请日：1983-12-06
申请人： Kenneth Martinez , William L. Betts
发明人： Kenneth Martinez , William L. Betts
IPC分类号： H04L27/38 , H04J3/06
CPC分类号： H04L27/38
摘要： In a receiver for multiplexed QAM/PSK signals which have been radial amplitude modulated for synchronization, an error signal is generated by each received signal to the corresponding ideal point as mapped in the complex plane. A synchronizing signal is generated and synchronized by the error signal and is used for both demultiplexing, and amplitude demodulating the signal.
摘要翻译：在用于同步的径向幅度调制的多路复用QAM / PSK信号的接收机中，每个接收到的信号产生的映射到复平面中的对应理想点的误差信号。同步信号由误差信号产生并同步，并用于解复用和幅度解调信号。

7. 发明授权

US4796279A Subrate preamble decoder for a high speed modem 失效
标题翻译：用于高速调制解调器的子频道前导码解码器
公开(公告)号：US4796279A
公开(公告)日：1989-01-03
申请号：US68733
申请日：1987-06-30
申请人： William L. Betts , Kenneth Martinez
发明人： William L. Betts , Kenneth Martinez
IPC分类号： H04L7/04 , H04L5/12 , H04B1/38
CPC分类号： H04L7/046
摘要： In a communication system, a plurality of remote modems send streams of data to a local modem, each remote modem preceding its transmission with a unique preamble consisting of phase reversed signals. At the local modem a preamble decoder detects the phase reversals of received signals without requiring channel equalization and the local modem uses this information for system setup.
摘要翻译：在通信系统中，多个远程调制解调器向本地调制解调器发送数据流，每个远程调制解调器在其传输之前具有由反相信号组成的唯一前导码。在本地调制解调器中，前导译码器检测接收信号的相位反转，而不需要信道均衡，本地调制解调器使用该信息进行系统设置。

8. 发明授权

US4744092A Transparent error detection in half duplex modems 失效
标题翻译：半双工调制解调器中的透明错误检测
公开(公告)号：US4744092A
公开(公告)日：1988-05-10
申请号：US752401
申请日：1985-07-05
申请人： William L. Betts , Kenneth Martinez
发明人： William L. Betts , Kenneth Martinez
IPC分类号： H04L1/00 , H04L5/16
CPC分类号： H04L1/0061 , H04L5/16
摘要： A modem is operated in a half-duplex mode having various elements which are trained on data and which are locked up while data is not exchanged, thereby eliminating the need for a preamble. A preamble is used if the period between successive transmissions exceeds a preselected threshold. In addition, a parity encoder is used to calculate a parity word for each transmission, said parity word being inserted in the first baud period of the next transmission. This first baud period is usually empty because data signals have not been received yet from the corresponding data transmission equipment.
摘要翻译：调制解调器以半双工模式操作，具有对数据进行了培训的各种元件，并且在不交换数据的情况下锁定调制解调器，从而消除对前导码的需要。如果连续传输之间的周期超过预选阈值，则使用前导码。此外，使用奇偶校验编码器来计算每个传输的奇偶校验字，所述奇偶校验字被插入下一个传输的第一个波特周期。由于数据信号尚未从相应的数据传输设备接收，所以这个第一波特率周期通常是空的。

9. 发明授权

US4677625A Distributed trellis encoder 失效
标题翻译：分布式网格编码器
公开(公告)号：US4677625A
公开(公告)日：1987-06-30
申请号：US707084
申请日：1985-03-01
申请人： William L. Betts , Kenneth Martinez , Gordon Bremer
发明人： William L. Betts , Kenneth Martinez , Gordon Bremer
IPC分类号： H03M13/25 , H03M13/33 , G06F11/10 , H03M13/22
CPC分类号： H03M13/25 , H03M13/33
摘要： In the transmitter of a data communication system using QAM, a plurality of trellis coders with delay units are used for forward error correction. The output of each encoder is modulated using QAM to generate sequential baud signal elements. The redundant data bits generated are distributed between several non-consecutive bauds. Likewise, at the receiver a plurality of distributed convolutional decoders are utilized to decode the received signal element. The distributed trellis decoder is self-synchronizing.
摘要翻译：在使用QAM的数据通信系统的发射机中，具有延迟单元的多个网格编码器用于前向纠错。使用QAM调制每个编码器的输出，以产生顺序波特信号元件。生成的冗余数据位分布在几个非连续波特率之间。类似地，在接收机处，使用多个分布式卷积解码器对接收的信号元素进行解码。分布式网格解码器是自同步的。

10. 发明授权

US4669090A Half-duplex modem without turnaround delay 失效
标题翻译：半双工调制解调器没有周转延迟
公开(公告)号：US4669090A
公开(公告)日：1987-05-26
申请号：US752402
申请日：1985-07-05
申请人： William L. Betts , Kenneth Martinez
发明人： William L. Betts , Kenneth Martinez
IPC分类号： H04L5/16 , H04L7/00 , H04B1/38
CPC分类号： H04L5/16 , H04L7/0083
摘要： A modem is operated in a half-duplex mode having various elements which are trained on data and which are locked up while data is not exchanged, thereby eliminating the need for a preamble. A preamble is used only if the period between successive transmissions exceeds a preselected threshold.
摘要翻译：调制解调器以半双工模式操作，具有对数据进行了培训的各种元件，并且在不交换数据的情况下锁定调制解调器，从而消除对前导码的需要。仅当连续传输之间的周期超过预选阈值时才使用前导码。

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