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1. 发明授权

US08841963B2 Gigabit ethernet transceiver with analog front end 有权
标题翻译：具有模拟前端的千兆以太网收发器
公开(公告)号：US08841963B2
公开(公告)日：2014-09-23
申请号：US11345946
申请日：2006-02-02
申请人： Arya R. Behzad , Klaas Bult , Ramon A. Gomez , Chi-Hung Lin , Tom W. Kwan , Oscar E. Agazzi , John L. Creigh , Mehdi Hatamian , David E. Kruse , Arthur Abnous , Henry Samueli
发明人： Arya R. Behzad , Klaas Bult , Ramon A. Gomez , Chi-Hung Lin , Tom W. Kwan , Oscar E. Agazzi , John L. Creigh , Mehdi Hatamian , David E. Kruse , Arthur Abnous , Henry Samueli
IPC分类号： H03K5/00 , H03H11/24 , H03F1/32 , H03G3/30 , H03F3/50 , H03G3/00 , H03F3/347 , H03G1/00 , H03G5/10
CPC分类号： H03F1/32 , H03F3/347 , H03F3/505 , H03F2200/211 , H03F2200/252 , H03F2200/421 , H03F2200/513 , H03G1/0088 , H03G3/001 , H03G3/3036 , H03G3/3052 , H03G5/10 , H03H11/245
摘要： Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-linearities in the signal. By isolating the switches from the signal path linearity of the PGA can be improved.
摘要翻译：电路从集成电路可编程增益衰减器中的信号路径中去除开关。可编程增益衰减器和可编程增益放大器通常使用半导体开关在信号电平之间切换。这种开关可能在信号中引入非线性。通过将开关与信号路径隔离，可以提高PGA的线性度。

2. 发明授权

US08422591B2 System and method for high speed communications using digital signal processing 失效
标题翻译：使用数字信号处理的高速通信系统和方法
公开(公告)号：US08422591B2
公开(公告)日：2013-04-16
申请号：US13090379
申请日：2011-04-20
申请人： Oscar E. Agazzi , Gottfried Ungerboeck , Keshab K. Parhi , Christian A. Lutkemeyer , Pieter Vorenkamp , Kevin T. Chan , Myles H. Wakayama
发明人： Oscar E. Agazzi , Gottfried Ungerboeck , Keshab K. Parhi , Christian A. Lutkemeyer , Pieter Vorenkamp , Kevin T. Chan , Myles H. Wakayama
IPC分类号： H04L27/00
CPC分类号： H04L25/4975 , H03M1/0604 , H03M1/1215 , H04L25/03133 , H04L25/03146 , H04L25/03343 , H04L25/497 , H04L2025/03503
摘要： Various systems and methods related to equalization precoding in a communications channel are disclosed. In one implementation precoding is performed on signals transmitted over an optical channel. In one implementation precoding and decoding operations are performed in parallel to facilitate high speed processing in relatively low cost circuits. Initialization of the precoders may be realized by transmitting information related to the characteristics of the channel between transceiver pairs.
摘要翻译：公开了与通信信道中的均衡预编码相关的各种系统和方法。在一个实现中，对通过光信道发射的信号执行预编码。在一个实现中，并行执行预编码和解码操作以便于在相对低成本的电路中进行高速处理。可以通过发送与收发器对之间的信道的特性相关的信息来实现预编码器的初始化。

3. 发明申请

US20120275780A1 Receivers Based on Closed-Form Parametric Estimates of the Probability Density Function for the Received Signal 有权
标题翻译：基于接收信号的概率密度函数的闭式参数估计的接收器
公开(公告)号：US20120275780A1
公开(公告)日：2012-11-01
申请号：US11832585
申请日：2007-08-01
申请人： Mario R. Hueda , Diego E. Crivelli , Hugo S. Carrer , Oscar E. Agazzi
发明人： Mario R. Hueda , Diego E. Crivelli , Hugo S. Carrer , Oscar E. Agazzi
IPC分类号： H04B10/06 , H04B10/08
CPC分类号： H04L25/03292 , H04L25/0202
摘要： A closed-form parametric approach to channel-estimation is provided. In one aspect, a specific parametric expression is presented for the received signal pdf that accurately models the behavior of the received signal in IM/DD optical channels. The corresponding parametric channel-estimation approach simplifies the design of MLSE receivers. The general technique lends itself well to the estimation of the signal pdf in situations where there are multiple sources of noise with different distributions, such as ASE noise, together with Gaussian and quantization noise, and signal-dependent noise, for example.
摘要翻译：提供了一种封闭形式的信道估计方法。在一个方面，给出了针对IM / DD光通道中的接收信号的行为进行精确模拟的接收信号pdf的特定参数表达式。相应的参数信道估计方法简化了MLSE接收机的设计。在具有不同分布的多个噪声源（例如ASE噪声）以及高斯和量化噪声以及与信号相关的噪声的情况下，一般技术很适合于对信号pdf的估计。

4. 发明授权

US08139630B2 High-speed receiver architecture 有权
标题翻译：高速接收机架构
公开(公告)号：US08139630B2
公开(公告)日：2012-03-20
申请号：US12335493
申请日：2008-12-15
申请人： Oscar E. Agazzi , Diego E. Crivelli , Hugo S. Carrer , Mario R. Hueda , German C. Luna , Carl Grace
发明人： Oscar E. Agazzi , Diego E. Crivelli , Hugo S. Carrer , Mario R. Hueda , German C. Luna , Carl Grace
IPC分类号： H03H7/30
CPC分类号： H03M1/1042 , H03M1/0626 , H03M1/0692 , H03M1/0695 , H03M1/1215 , H03M1/181 , H03M1/42 , H03M1/44 , H04L1/0054 , H04L1/0071 , H04L7/0004 , H04L7/0062 , H04L7/0083 , H04L7/0087 , H04L25/0204 , H04L25/03038
摘要： A receiver (e.g., for a 10 G fiber communications link) includes an interleaved ADC coupled to a multi-channel equalizer that can provide different equalization for different ADC channels within the interleaved ADC. That is, the multi-channel equalizer can compensate for channel-dependent impairments. In one approach, the multi-channel equalizer is a feedforward equalizer (FFE) coupled to a Viterbi decoder, for example a sliding block Viterbi decoder (SBVD); and the FFE and/or the channel estimator for the Viterbi decoder are adapted using the LMS algorithm.
摘要翻译：接收机（例如，用于10G光纤通信链路）包括耦合到多通道均衡器的交错ADC，其可以为交错ADC内的不同ADC通道提供不同的均衡。也就是说，多通道均衡器可以补偿信道相关的损伤。在一种方法中，多信道均衡器是耦合到维特比解码器（例如滑块维特比解码器（SBVD））的前馈均衡器（FFE）; 并且使用LMS算法适配维特比解码器的FFE和/或信道估计器。

5. 发明申请

US20110058596A1 Multi-Channel Equalization to Compensate for Impairments Introduced by Interleaved Devices 有权
标题翻译：多通道均衡补偿交错设备引入的损害
公开(公告)号：US20110058596A1
公开(公告)日：2011-03-10
申请号：US12839178
申请日：2010-07-19
申请人： Oscar E. Agazzi , Diego E. Crivelli , Hugo S. Carrer , Mario R. Hueda , German C. Luna
发明人： Oscar E. Agazzi , Diego E. Crivelli , Hugo S. Carrer , Mario R. Hueda , German C. Luna
IPC分类号： H03K5/159
CPC分类号： H04L25/03057 , H03M1/0626 , H03M1/1215 , H04L25/03184 , H04L25/03292 , H04L2025/03356 , H04L2025/03426 , H04L2025/03477 , H04L2025/03617
摘要： A system includes a time-interleaved device. An equalizer effectively can apply different equalization to different interleaved channels. For convenience, these equalizers will be referred to as multi-channel equalizers. In one aspect, an apparatus includes an interleaved device having M interleaved channels, and a multi-channel equalizer coupled to the interleaved device. The multi-channel equalizer is capable of applying a different equalization to different interleaved channels, thus compensating for channel-dependent impairments.
摘要翻译：系统包括时间交织设备。均衡器可以有效地将不同的均衡应用于不同的交织信道。为了方便起见，这些均衡器将被称为多通道均衡器。在一个方面，一种装置包括具有M个交织信道的交织设备和耦合到该交错设备的多信道均衡器。多信道均衡器能够对不同的交织信道应用不同的均衡，从而补偿信道相关损伤。

6. 发明授权

US07852913B2 High-speed receiver architecture 有权
标题翻译：高速接收机架构
公开(公告)号：US07852913B2
公开(公告)日：2010-12-14
申请号：US11559850
申请日：2006-11-14
申请人： Oscar E. Agazzi , Diego E. Crivelli , Hugo S. Carrer , Mario R. Hueda , German C. Luna , Carl Grace
发明人： Oscar E. Agazzi , Diego E. Crivelli , Hugo S. Carrer , Mario R. Hueda , German C. Luna , Carl Grace
IPC分类号： H03K5/159
CPC分类号： H04L25/03038 , H03M1/0626 , H03M1/1004 , H03M1/1215 , H03M1/44 , H04B10/6971 , H04L1/0054 , H04L1/0071 , H04L1/06 , H04L25/0204 , H04L25/025 , H04L25/03057 , H04L25/03184 , H04L25/03292 , H04L2025/03356 , H04L2025/03426 , H04L2025/03477 , H04L2025/03617
摘要： A receiver (e.g., for a 10 G fiber communications link) includes an interleaved ADC coupled to a multi-channel equalizer that can provide different equalization for different ADC channels within the interleaved ADC. That is, the multi-channel equalizer can compensate for channel-dependent impairments. In one approach, the multi-channel equalizer is a feedforward equalizer (FFE) coupled to a Viterbi decoder, for example a sliding block Viterbi decoder (SBVD); and the FFE and/or the channel estimator for the Viterbi decoder are adapted using the LMS algorithm.
摘要翻译：接收机（例如，用于10G光纤通信链路）包括耦合到多通道均衡器的交错ADC，其可以为交错ADC内的不同ADC通道提供不同的均衡。也就是说，多通道均衡器可以补偿信道相关的损伤。在一种方法中，多信道均衡器是耦合到维特比解码器（例如滑块维特比解码器（SBVD））的前馈均衡器（FFE）; 并且使用LMS算法适配维特比解码器的FFE和/或信道估计器。

7. 发明申请

US20100135372A1 Demodulator for a Multi-Pair Gigabit Transceiver 有权
标题翻译：用于多对千兆位收发器的解调器
公开(公告)号：US20100135372A1
公开(公告)日：2010-06-03
申请号：US12698639
申请日：2010-02-02
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H04B1/38 , H04B1/10
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/006 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A feedforward equalizer for equalizing a sequence of signal samples received by a receiver from a remote transmitter. The feedforward equalizer has a gain and is included in the receiver which includes a timing recovery module for setting a sampling phase and a decoder. The feedforward equalizer comprises a non-adaptive filter and a gain stage. The non-adaptive filter receives the signal samples and produces a filtered signal. The gain stage adjusts the gain of the feedforward equalizer by adjusting the amplitude of the filtered signal. The amplitude of the filtered signal is adjusted so that it fits in the operational range of the decoder. The feedforward equalizer does not affect the sampling phase setting of the timing recovery module of the receiver.
摘要翻译：前馈均衡器，用于均衡来自远程发射机的接收机接收的信号样本序列。前馈均衡器具有增益并且被包括在接收机中，该接收机包括用于设置采样相位和解码器的定时恢复模块。前馈均衡器包括非自适应滤波器和增益级。非自适应滤波器接收信号样本并产生滤波信号。增益级通过调整滤波信号的幅度来调节前馈均衡器的增益。调整滤波后的信号的幅度使其适合于解码器的操作范围。前馈均衡器不影响接收机的定时恢复模块的采样相位设置。

8. 发明申请

US20090060018A1 Transmit Equalizer For Dispersive Channels 审中-公开
标题翻译：发射均衡器用于分散通道
公开(公告)号：US20090060018A1
公开(公告)日：2009-03-05
申请号：US12056229
申请日：2008-03-26
申请人： Oscar E. Agazzi , Hugo S. Carrer
发明人： Oscar E. Agazzi , Hugo S. Carrer
IPC分类号： H03H7/30
CPC分类号： H04L25/03343 , H04L25/03044
摘要： An equalizer at the transmitter reduces data-dependent jitter introduced by a non-linear device in the transmitter. In one implementation, the equalizer is T/2-spaced. In an alternate implementation, it is T-spaced.
摘要翻译：发射机上的均衡器减少了发射机中非线性设备引入的数据相关抖动。在一个实现中，均衡器是T / 2间隔的。在替代实现中，它是T间隔的。

9. 发明授权

US07434134B2 System and method for trellis decoding in a multi-pair transceiver system 有权
标题翻译：用于多对收发器系统中网格解码的系统和方法
公开(公告)号：US07434134B2
公开(公告)日：2008-10-07
申请号：US10798675
申请日：2004-03-11
申请人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
发明人： Oscar E. Agazzi , David Kruse , Arthur Abnous , Mehdi Hatamian
IPC分类号： H03M13/00
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H04B3/23 , H04B3/32 , H04L1/0054 , H04L1/0059 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03745
摘要： A method and a system for decoding information signals encoded in accordance with a multi-state encoding scheme and transmitted over a multi-dimensional transmission channel by computing a distance of a received word from a codeword. One-dimensional (1D) input signals are processed in a pair of symbol decoders, implemented as look-up tables, to produce a pair of 1D errors, with each representing a distance metric between the input signal and a symbol in one of two disjoint symbol-subsets. The 1D errors are combined based on the multi-state encoding scheme in order to produce a set of multi-dimensional error terms. Each of the multi-dimensional error terms corresponds to a distance between a received word and a nearest codeword.
摘要翻译：一种用于对根据多状态编码方案编码并通过计算从码字的接收字的距离而在多维传输信道上传送的信息信号的方法和系统。一维（1D）输入信号在一对符号解码器中被处理，被实现为查找表，以产生一对1D误差，其中每一个代表在两个不相交中的一个中的输入信号和符号之间的距离度量符号子集。基于多状态编码方案组合1D误差，以产生一组多维误差项。多维误差项中的每一个对应于接收到的字和最近的码字之间的距离。

10. 发明申请

US20080170641A1 METHOD, APPARATUS AND SYSTEM FOR HIGH-SPEED TRANSMISSION ON FIBER OPTIC CHANNEL 有权
标题翻译：光纤通道高速传输的方法，装置和系统
公开(公告)号：US20080170641A1
公开(公告)日：2008-07-17
申请号：US12055093
申请日：2008-03-25
申请人： Oscar E. Agazzi
发明人： Oscar E. Agazzi
IPC分类号： H04L27/38 , H04L27/04
CPC分类号： H04L1/006 , H04B10/2575 , H04B10/2581 , H04B10/504 , H04B10/5055 , H04B10/541 , H04B10/548 , H04J14/02 , H04L25/0204 , H04L25/0224 , H04L27/2637 , H04L27/2653 , H04L27/2697 , H04L27/34
摘要： Multi-carrier modulation fiber optic systems constructed using a series of electrical carriers, modulating the data on the electrical carriers and combining the carriers to form a wideband signal. The wideband signal can then be intensity modulated on a laser and coupled to a fiber optic channel. A receiver may then receive the laser signal from the fiber optic channel and convert it into an electrical signal. Multi-carrier modulation may be applied to existing fiber channels, which may be of lower quality. Existing fiber channels may have characteristics which prevent or restrict the transmission of data using intensity modulation at certain frequencies. An adaptive multi-carrier modulation transmitter may characterize an existing fiber optic channel and ascertain the overall characteristics of the channel. The transmitter and receiver can then be configured to use various bandwidths and various modulations in order to match the transfer characteristic of the fiber channel. A series of adaptive multi-carrier modulation transmitters and receivers can be integrated on a single integrated circuit. If multiple adaptive receivers and transmitters are integrated on a single integrated circuit, they may be used to upgrade existing networks by adding different wavelength lasers for the transmission of data in order to achieve any capacity desired. Each receiver and transmitter may characterize the fiber for its particular wavelength laser and may configure the modulation and bandpass to the fiber's characteristics.
摘要翻译：使用一系列电载体构建的多载波调制光纤系统，调制电载波上的数据并组合载波以形成宽带信号。然后可以在激光器上对宽带信号进行强度调制并耦合到光纤通道。然后，接收器可以从光纤通道接收激光信号并将其转换为电信号。多载波调制可以应用于可能具有较低质量的现有光纤信道。现有的光纤通道可以具有在某些频率下使用强度调制来防止或限制数据传输的特性。自适应多载波调制发射机可以表征现有光纤信道并确定信道的总体特性。然后可以将发射机和接收机配置为使用各种带宽和各种调制，以便匹配光纤信道的传输特性。一系列自适应多载波调制发射机和接收机可集成在单个集成电路上。如果多个自适应接收机和发射机集成在单个集成电路上，则它们可用于通过为数据传输添加不同波长的激光器来升级现有网络，以实现所需的任何容量。每个接收器和发射器可以表征其特定波长激光器的光纤，并且可以配置对光纤的特性的调制和带通。

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