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1. 发明申请

US20040190661A1 Method and system for equalizing communication signals 审中-公开
标题翻译：用于均衡通信信号的方法和系统
公开(公告)号：US20040190661A1
公开(公告)日：2004-09-30
申请号：US10809756
申请日：2004-03-25
申请人： Quellan, Inc.
发明人： Michael Vrazel
IPC分类号： H04B001/10
CPC分类号： H04L25/03885
摘要： A receiver that can include an adaptive equalizer and a comparator processes communication signals that have been distorted by a propagation medium. The adaptive equalizer can correct for distortion of the received signals. The comparator can accept the equalized signal from the equalizer and quantize this signal. A control loop coupled to the equalized signal and the quantized signal can adjust the equalizer. The control loop can adjust the equalizer so that the high frequency energy in the equalized signal approximates the high-frequency energy in the quantized signal, taking into account variation between the low-frequency energies of these two signals.
摘要翻译：可以包括自适应均衡器和比较器的接收器处理由传播介质失真的通信信号。自适应均衡器可以校正接收信号的失真。比较器可以接受来自均衡器的均衡信号并量化该信号。耦合到均衡信号和量化信号的控制环路可以调节均衡器。控制回路可以调整均衡器，使得均衡信号中的高频能量近似于量化信号中的高频能量，同时考虑到这两个信号的低频能量之间的变化。

2. 发明申请

WO2004045078A3 HIGH-SPEED ANALOG-TO-DIGITAL CONVERSION WITH IMPROVED ROBUSTNESS TO TIMING UNCERTAINTY 审中-公开
标题翻译：具有改进的鲁棒性到时序不确定性的高速模拟到数字转换
公开(公告)号：WO2004045078A3
公开(公告)日：2004-07-15
申请号：PCT/US0335887
申请日：2003-11-12
申请人： QUELLAN INC
发明人： KIM ANDREW JOO , RALPH STEPHEN E , BAJEKAL SANJAY
IPC分类号： H03M1/06 , H03M1/08 , H03M1/12 , H04L1/00 , H04L7/02 , H03M13/00 , H04L25/00
CPC分类号： H04L7/0062 , H03M1/0675 , H03M1/0836 , H03M1/1245 , H04L1/0052 , H04L1/0054
摘要： A method and system using the principle of generalized maximum likelihood estimation to resolve sample timing uncertainties that are associated with the decoding (105) of communication signals. By using generalized maximum likelihood estimation, sample timing uncertainty can be resolved by taking multiple samples (402) of the received signal within a symbol period and determining which sample best corresponds to the optimal sample timing. The sample which best corresponds to the optimal sample timing can be determined from a timing index which can be calculated from ambiguity indicators that are based on the samples of the received signal.
摘要翻译：一种使用广义最大似然估计原理来解决与通信信号的解码（105）相关联的采样定时不确定性的方法和系统。通过使用广义最大似然估计，可以通过在符号周期内采用接收信号的多个样本（402）来确定采样定时不确定度，并确定哪个采样最佳对应于最佳采样定时。可以从可以基于接收信号的样本的模糊度指标计算的定时指标来确定最佳对应于最佳采样定时的样本。

3. 发明专利

DE602004030032D1 VERFAHREN UND SYSTEM ZUR LÖSCHUNG VON ANTENNENSTÖRUNGEN 未知
公开(公告)号：DE602004030032D1
公开(公告)日：2010-12-23
申请号：DE602004030032
申请日：2004-11-17
申请人： QUELLAN INC
发明人： GEBARA EDWARD , LASKAR JOY , TENTZERIS EMMANOUIL M , KIM ANDREW JOO
IPC分类号： H04L7/06 , H01Q1/52 , H04B1/10 , H04B1/12 , H04B1/38 , H04B1/44 , H04B1/52 , H04B7/185 , H04B15/00 , H04B17/00 , H04L20060101 , H04L1/00 , H04L1/24 , H04L7/00 , H04L27/10

4. 发明专利

DE112007001045T5 未知
公开(公告)号：DE112007001045T5
公开(公告)日：2009-04-16
申请号：DE112007001045
申请日：2007-04-26
申请人： QUELLAN INC
发明人： KIM ANDREW JOO
IPC分类号： H04L27/00
摘要： A communications channel may radiate energy undesirably, for example in the form of electromagnetic radiation, when a communication signal transmits over the communications channel. Processing the signal before and after transmission on the communications channel can reduce the level of radiated energy. Signal processing in advance of transmission over the communications channel can transform the communication signal into a waveform that has a reduced propensity to emit radiated energy during transmission over the communications channel. Exemplary signal transformations can involve applying either frequency-selective or broadband attenuation to the communication signal. Following transmission of the waveform over the communications channel, the original communication signal can be restored via reversing the signal transformation. The reverse transformation can comprise applying frequency-selective gain or broadband gain to the transmitted waveform.

5. 发明专利

AU2003217947A8 High speed analog-to-digital converter using a unique gray code having minimal bit transitions 未知
公开(公告)号：AU2003217947A8
公开(公告)日：2003-09-22
申请号：AU2003217947
申请日：2003-03-07
申请人： QUELLAN INC
发明人： HIETALA VINCENT MARK , KIM ANDREW JOO
IPC分类号： H03M1/06 , H03M1/08 , H03M1/36 , H03M7/16 , H04B14/02
摘要： A method for high speed communications uses an inventive Q-Gray code. The Q-Gray code simplifies the hardware needed to convert analog Q-Gray code signals to digital signals. An analog-to-digital converter can use a plurality of comparators for receiving the multilevel signal and a plurality of decoder blocks coupled to comparators for decoding the multilevel signal. Each decoder block can include an equal number of inputs. Specifically, each decoder block can also include a parity detector with an equal number of inputs. Each decoder block can also employ a bank of identical parity detectors relative to another decoder block. Each comparator of the analog to digital converter can have an individually or externally adjustable (or both) threshold level.

6. 发明申请

US20040105462A1 High-speed analog-to-digital conversion with improved robustness to timing uncertainty 有权
标题翻译：高速模数转换，具有改进的时序不确定性鲁棒性
公开(公告)号：US20040105462A1
公开(公告)日：2004-06-03
申请号：US10706187
申请日：2003-11-12
申请人： Quellan, Inc.
发明人： Andrew Joo Kim , Stephen E. Ralph , Sanjay Bajekal
IPC分类号： H04J003/16
CPC分类号： H04L7/0062 , H03M1/0675 , H03M1/0836 , H03M1/1245 , H04L1/0052 , H04L1/0054
摘要： A method and system using the principle of generalized maximum likelihood estimation to resolve sample timing uncertainties that are associated with the decoding of communication signals. By using generalized maximum likelihood estimation, sample timing uncertainty can be resolved by taking multiple samples of the received signal within a symbol period and determining which sample best corresponds to the optimal sample timing. The sample which best corresponds to the optimal sample timing can be determined from a timing index which can be calculated from ambiguity indicators that are based on the samples of the received signal.
摘要翻译：一种使用广义最大似然估计原理来解决与通信信号的解码相关联的采样定时不确定性的方法和系统。通过使用广义最大似然估计，可以通过在符号周期内采集接收信号的多个样本来确定采样定时不确定度，并确定哪个采样最佳对应于最佳采样定时。可以从可以基于接收信号的样本的模糊度指标计算的定时指标来确定最佳对应于最佳采样定时的采样。

7. 发明申请

US20020167693A1 Increasing data throughput in optical fiber transmission systems 失效
标题翻译：增加光纤传输系统中的数据吞吐量
公开(公告)号：US20020167693A1
公开(公告)日：2002-11-14
申请号：US10032586
申请日：2001-12-21
申请人： Quellan, Inc.
发明人： Michael G. Vrazel , Stephen E. Ralph , Joy Laskar , Sungyong Jung , Vincent Mark Hietala , Edward Gebara
IPC分类号： H04B010/12 , H04J014/02 , G02B006/28
CPC分类号： H04L1/0042 , G11C27/02 , H04L25/03343 , H04L27/02 , H04L27/367
摘要： Data throughput rates are increased in an optical fiber communication system without requiring replacement of the existing optical fiber in a link. Channel throughput is increased by upgrading the components and circuitry in the head and terminal of an optical fiber communication system link. Aggregate throughput in a fiber optic link is increased beyond the range of conventional Wavelength Division Multiplexed (WDM) upgrades, while precluding the necessity of replacing existing fiber plants. The increase in system throughput is achieved by using advanced modulation techniques to encode greater amounts of data into the transmitted spectrum of a channel, thereby increasing the spectral efficiency of each channel. This novel method of increasing transmission capacity by upgrading the head and terminal of the system to achieve greater spectral efficiency and hence throughput, alleviates the need to replace existing fiber plants. Spectrally efficient complex modulation techniques can be supported by interface circuits with an increased level of signal processing capability in order to both encode multiple bits into a transmitted symbol and decode the original data from the received symbols.
摘要翻译：数据吞吐率在光纤通信系统中增加，而不需要更换链路中现有的光纤。通过升级光纤通信系统链路的头端和终端中的组件和电路来增加信道吞吐量。光纤链路中的总吞吐量增加超出常规波分复用（WDM）升级的范围，同时排除了替换现有光纤设备的必要性。系统吞吐量的增加通过使用先进的调制技术将更大量的数据编码到信道的传输频谱中，从而提高每个信道的频谱效率来实现。这种通过升级系统的头部和终端来提高传输容量以实现更高的频谱效率和因此的吞吐量的这种新颖的方法减轻了替换现有的光纤设备的需要。频谱效率高的复调制技术可以由具有增加的信号处理能力水平的接口电路来支持，以便将多个比特编码到发射符号中并且从接收的符号解码原始数据。

8. 发明申请

US20130064382A1 Pre-Configuration and Control of Radio Frequency Noise Cancellation 审中-公开
标题翻译：射频噪声消除预配置与控制
公开(公告)号：US20130064382A1
公开(公告)日：2013-03-14
申请号：US13673150
申请日：2012-11-09
申请人： QUELLAN, INC.
发明人： David Anthony Stelliga , Wilhelm Steffen Hahn
IPC分类号： G10K11/16
CPC分类号： H04B15/00
摘要： A noise-reduction system includes a noise-pattern predictor in communication with a noise-canceling module. In a more specific embodiment, the noise-reduction apparatus further includes an input collector in communication with the noise-pattern predictor. The input collector is coupled to a first module, such as a sensor, that provides information to the noise-pattern predictor to facilitate predicting noise in an accompanying signal environment and to provide a first signal in response thereto. In an illustrative embodiment, the first signal includes information indicating when an ignition system of a vehicle will turn on. The first signal further includes information indicating when a second signal transmitted from a cellular base station will affect noise in the signal environment. The second signal may include a burst in a cellular signal.
摘要翻译：噪声降低系统包括与噪声消除模块通信的噪声模式预测器。在更具体的实施例中，降噪装置还包括与噪声模式预测器通信的输入收集器。输入收集器耦合到诸如传感器的第一模块，其向噪声模式预测器提供信息以便于预测伴随的信号环境中的噪声并提供响应于此的第一信号。在说明性实施例中，第一信号包括指示车辆的点火系统什么时候开启的信息。第一信号还包括指示从蜂窝基站发送的第二信号何时将影响信号环境中的噪声的信息。第二信号可以包括蜂窝信号中的突发。

9. 发明申请

US20030156655A1 Multi-level signal clock recovery technique 失效
标题翻译：多级信号时钟恢复技术
公开(公告)号：US20030156655A1
公开(公告)日：2003-08-21
申请号：US10366112
申请日：2003-02-12
申请人： Quellan, Inc.
发明人： Vincent Mark Hietala , Andrew Joo Kim
IPC分类号： H04L025/49
CPC分类号： H04L7/033 , H03K5/08 , H03K5/135 , H03K5/1534 , H04L7/0087 , H04L25/4917
摘要： Clock recovery of a multi-level (ML) signal can be performed in a two-step process. First, the transitions within the ML signal can be detected by a novel transition detector (TD). And second, the output of the TD circuit can comprise a pseudo-non-return-to-zero (pNRZ) signal that can drive a conventional OOK clock recovery (CR) IC. The TD circuit can convert the edges of the ML signal into the pseudo-NRZ (pNRZ) signal. The TD circuit can capture as many transitions as possible to allow the conventional NRZ clock recovery (CR) chip to optimally perform. The TD circuit can differentiate the ML signal in order to detect the ML signal's transitions.
摘要翻译：多级（ML）信号的时钟恢复可以在两步过程中执行。首先，可以通过新颖的转换检测器（TD）来检测ML信号内的转换。第二，TD电路的输出可以包括可驱动常规OOK时钟恢复（CR）IC的伪非归零（pNRZ）信号。 TD电路可以将ML信号的边沿转换成伪NRZ（pNRZ）信号。 TD电路可以捕获尽可能多的转换，以允许传统的NRZ时钟恢复（CR）芯片最佳地执行。 TD电路可以区分ML信号，以便检测ML信号的转换。

10. 发明申请

US20130064335A1 ADAPTIVE NOISE FILTERING AND EQUALIZATION 有权
标题翻译：自适应噪声滤波和均衡
公开(公告)号：US20130064335A1
公开(公告)日：2013-03-14
申请号：US13673147
申请日：2012-11-09
申请人： Quellan, Inc.
发明人： Andrew Joo Kim , Vincent Mark Hietala , Sanjay Bajekal
IPC分类号： H04B1/10
CPC分类号： H04L25/03076 , H04L25/03267 , H04L2025/03363 , H04L2025/03471
摘要： Processing a signal comprising signal distortions with filters. The filters comprise a first filter configured to a first time scale to compensate for signal distortions within respective symbols of the signal and a second filter configured to a second time scale to compensate for signal distortions among symbols of the signal. A probability estimate is produced based on an output of at least one of the first and second filters. At least one of the first and second time scales is adjusted according to the probability estimate.
摘要翻译：用滤波器处理包含信号失真的信号。滤波器包括被配置为第一时间尺度以补偿信号的相应符号内的信号失真的第一滤波器，以及被配置为第二时间尺度以补偿信号的符号之间的信号失真的第二滤波器。基于第一和第二滤波器中的至少一个的输出产生概率估计。根据概率估计来调整第一和第二时间尺度中的至少一个。

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