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1. 发明授权

US06434395B1 Portable communications and data terminal having multiple modes of operation 失效
标题翻译：具有多种操作模式的便携式通信和数据终端
公开(公告)号：US06434395B1
公开(公告)日：2002-08-13
申请号：US08769036
申请日：1996-12-18
申请人： Michael L. Lubin , Seton P. Kasmir , Kathryn A. Kubasak , Gregory A. Hein , Surendra B. Mandava , Chanchai Poonpol , Shahin Hedayat , Donald W. Burtis
发明人： Michael L. Lubin , Seton P. Kasmir , Kathryn A. Kubasak , Gregory A. Hein , Surendra B. Mandava , Chanchai Poonpol , Shahin Hedayat , Donald W. Burtis
IPC分类号： H04Q720
CPC分类号： H04W76/20 , H04W88/06
摘要： A portable radio telephone handset includes the capability of operating as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation are available in the handset, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode. A paging function for incoming analog cellular communication is carried out on a CDPD channel. The handset distinguishes between paging signals identifying CDPD mode communications and paging signals identifying analog cellular communications. The handset automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration.
摘要翻译：便携式无线电话手机包括作为数据传送终端以及模拟蜂窝电话用户台操作的能力。在手机，模拟蜂窝通信模式和蜂窝数字分组数据（CDPD）模式中可以使用两种操作模式。用于输入模拟蜂窝通信的寻呼功能在CDPD信道上进行。手机区分识别CDPD模式通信的寻呼信号和识别模拟蜂窝通信的寻呼信号。手机自动抢占CDPD通信，有利于诸如在AMPS配置中执行的模拟蜂窝通信。

2. 发明授权

US06731752B1 Method and circuit for echo-cancellation in two-way communications 有权
标题翻译：双向通信中回波消除的方法和电路
公开(公告)号：US06731752B1
公开(公告)日：2004-05-04
申请号：US09708403
申请日：2000-11-08
申请人： Naom Chaplik , Chanchai Poonpol , Mark T. Robinson
发明人： Naom Chaplik , Chanchai Poonpol , Mark T. Robinson
IPC分类号： H04M100
CPC分类号： H04B3/23 , H04M1/74
摘要： A hybrid circuit models a plurality of attributes of a communication system including a subscriber line coupled to a line interface circuit. The plurality of attributes includes subscriber line impedance, and impedance of a coupling transformer. The attributes are based on other factors, such as whether or not bridge taps exist at or near the line interface circuit on the subscriber line. The plurality of attributes are modeled by a specific arrangement of resistive and capacitive elements to substantially duplicate the collective transformative effects of the attributes on a transmission signal being sent out on the subscriber line. The transmission signal is transformed and provided to an output, where it is subtracted from a composite signal representing a combination of the actual transformed transmission signal and a receive signal. The subtraction yields an isolated receive signal, which is later processed to recover the full receive signal.
摘要翻译：混合电路对包括耦合到线路接口电路的用户线的通信系统的多个属性进行建模。多个属性包括用户线阻抗和耦合变压器的阻抗。属性基于其他因素，例如在用户线上的线路接口电路上或附近是否存在桥接抽头。多个属性通过电阻和电容元件的特定布置来建模，以基本上复制属性对在用户线上发送的传输信号的集体变换效应。传输信号被变换并提供给输出，其中从表示实际变换的传输信号和接收信号的组合的复合信号中减去传输信号。减法产生一个隔离的接收信号，后来被处理以恢复完整的接收信号。

3. 发明授权

US5838727A Method and apparatus for transmitting and receiving digital data over a bandpass channel 失效
标题翻译：用于通过带通信道发送和接收数字数据的方法和装置
公开(公告)号：US5838727A
公开(公告)日：1998-11-17
申请号：US657225
申请日：1991-02-15
申请人： David Lewis Lyon , Chanchai Poonpol , Michael Andrew Montgomery , Jimmy Everett Neeley
发明人： David Lewis Lyon , Chanchai Poonpol , Michael Andrew Montgomery , Jimmy Everett Neeley
IPC分类号： H04L27/20 , H04L27/34 , H04L27/36 , H04L5/12
CPC分类号： H04L27/2071 , H04L27/3494 , H04L27/365
摘要： A method and apparatus for transmitting and receiving acquired digital data over bandpass channels (i.e. channels having a limited range of frequencies) at high data transmission rates. Combined amplitude and phase modulation (quadrature amplitude modulation) is applied to the digital data and the sampled digital waveform converted to an analog waveform for passage over the bandpass channel. The sample rate is chosen as an integer multiple of the symbol rate and carrier frequency to significantly reduce processing overhead. Reception of the acquired data is similar to transmission and involves an analogous amplitude and phase demodulation. The quadrature amplitude modulation technique of the present invention is applied to an oil well-logging application to transmit the data acquired from the downhole logging instruments over the logging cable (bandpass channel) at high transmission rates.
摘要翻译：一种在高数据传输速率下通过带通信道（即具有有限的频率范围的信道）发送和接收获取的数字数据的方法和装置。将组合的幅度和相位调制（正交幅度调制）应用于数字数据，并将采样的数字波形转换为模拟波形以通过带通通道。选择采样率作为符号速率和载波频率的整数倍，以显着减少处理开销。所获取的数据的接收与传输类似，并涉及类似的幅度和相位解调。本发明的正交幅度调制技术应用于油井测井应用，以高传输速率通过测井电缆（带通通道）传输从井下测井仪获取的数据。

4. 发明授权

US06175599B1 Method and apparatus for transmitting and receiving digital data over a bandpass channel 失效
标题翻译：用于通过带通信道发送和接收数字数据的方法和装置
公开(公告)号：US06175599B1
公开(公告)日：2001-01-16
申请号：US09069900
申请日：1998-04-30
申请人： David Lewis Lyon , Chanchai Poonpol , Michael Andrew Montgomery , Jimmy Everett Neeley
发明人： David Lewis Lyon , Chanchai Poonpol , Michael Andrew Montgomery , Jimmy Everett Neeley
IPC分类号： H04L512
CPC分类号： H04L27/2071 , H04L27/3494 , H04L27/365
摘要： A method and apparatus for transmitting and receiving acquired digital data over bandpass channels (i.e. channels having a limited range of frequencies) at high data transmission rates. Combined amplitude and phase modulation (quadrature amplitude modulation) is applied to the digital data and the sampled digital waveform converted to an analog waveform for passage over the bandpass channel. The sample rate is chosen as an integer multiple of the symbol rate and carrier frequency to significantly reduce processing overhead. Reception of the acquired data is similar to transmission and involves an analogous amplitude and phase demodulation. The quadrature amplitude modulation technique of the present invention is applied to an oil well-logging application to transmit the data acquired from the downhole logging instruments over the logging cable (bandpass channel) at high transmission rates.
摘要翻译：一种在高数据传输速率下通过带通信道（即具有有限的频率范围的信道）发送和接收获取的数字数据的方法和装置。将组合的幅度和相位调制（正交幅度调制）应用于数字数据，并将采样的数字波形转换为模拟波形以通过带通通道。选择采样率作为符号速率和载波频率的整数倍，以显着减少处理开销。所获取的数据的接收与传输类似，并涉及类似的幅度和相位解调。本发明的正交幅度调制技术应用于油井测井应用，以高传输速率通过测井电缆（带通通道）传输从井下测井仪获取的数据。

5. 发明授权

US5257265A Method and apparatus for reducing multipath distortion 失效
标题翻译：减少多径失真的方法和装置
公开(公告)号：US5257265A
公开(公告)日：1993-10-26
申请号：US741310
申请日：1991-08-07
申请人： Chun-Meng Su , Chanchai Poonpol , George M. Peponides
发明人： Chun-Meng Su , Chanchai Poonpol , George M. Peponides
IPC分类号： H04B7/005 , H04J3/06
CPC分类号： H04B7/005 , H04L7/041
摘要： For every TDMA block the receiver operation starts with a forward processing procedure and operates on received samples in a first-in first-served order. A sync word detector 32a (see FIG. 4 ) ensures the correct TDMA frame timing and starts the equalizer training. Detected data is stacked in a decision buffer 46. An adaptive equalizer 34a outputs a decision error signal that is used to generate a latch-type loss-of-lock flag. Without loss-of-lock, the receiver works through to the last data symbol and the frame processing is finished.Forward processing is halted and the receiver switches to a backward processing branch if the receiver loses lock midway through the data block. The backward processing branch processes received samples from the input buffer 30 in reverse order. The sync word detector 32b detects the reverse trailing sync word (SYNC #2) and recovers the TDMA symbol timing. The receiver then trains the equalizer and starts data processing in a reverse mode. The detected data is then stacked in the decision buffer 46, starting from Nth symbol. The reverse loss-of-lock detector works the same as the forward loss-of-lock detector, however the control logic is modified such that backward processing works until either detected data overwrites a portion of the forward-processed data, or a loss-of-lock is declared. In the former case, the frame processing is finished. In the latter case, the midpoint between the two loss-of-lock points is calculated and, if needed, both processes are enabled toward the midpoint.
摘要翻译：对于每个TDMA块，接收机操作以转发处理过程开始，并以先到先后的顺序对所接收的样本进行操作。同步字检测器32a（参见图4）确保正确的TDMA帧定时并开始均衡器训练。检测到的数据被堆叠在判定缓冲器46中。自适应均衡器34a输出用于产生锁存型失锁标志的判定误差信号。没有锁定损失，接收器工作到最后的数据符号，帧处理完成。如果接收器在数据块的中途失去锁定，则停止转发处理并且接收器切换到后向处理分支。后向处理分支以相反的顺序处理来自输入缓冲器30的接收样本。同步字检测器32b检测反向后同步字（SYNC＃2）并恢复TDMA符号定时。接收机然后训练均衡器并以反向模式开始数据处理。然后将检测到的数据从第N个符号开始堆叠在判定缓冲器46中。反向丢失锁定检测器的工作原理与前向锁定锁定检测器相同，但是控制逻辑被修改为使得后向处理工作，直到检测到的数据覆盖正向处理的数据的一部分，声明了。在前一种情况下，帧处理结束。在后一种情况下，计算两个失锁点之间的中点，如果需要，两个进程都能够朝向中点启用。

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