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1. 发明授权

US5929703A Method and device for modeling AM-AM and AM-PM characteristics of an amplifier, and corresponding predistortion method 失效
标题翻译：用于建模放大器的AM-AM和AM-PM特性的方法和装置，以及相应的预失真方法
公开(公告)号：US5929703A
公开(公告)日：1999-07-27
申请号：US906893
申请日：1997-08-06
申请人： Philippe Sehier , Rossano Marchesani
发明人： Philippe Sehier , Rossano Marchesani
IPC分类号： H03F1/32 , H04L27/00 , H04L27/36 , H03F1/26
CPC分类号： H03F1/3258 , H03F1/3247 , H03F1/3294 , H04L27/368 , H03F2201/3233 , H04L2027/0016
摘要： A method of modeling the AM--AM and AM-PM characteristics of an amplifier includes the step of transmitting a reference signal to the amplifier. The response of the amplifier to the reference signal is digitized to produce two sets of AM--AM and AM-PM reference samples, respectively. Two series of polynomials respectively representative of the AM--AM and the AM-PM characteristics are determined from the samples. The determination of each polynomial allows for the second derivative of the polynomial and for the distances between the samples and points on the curve defined by the polynomial.
摘要翻译：对放大器的AM-AM和AM-PM特性进行建模的方法包括将参考信号发送到放大器的步骤。放大器对参考信号的响应被数字化，以分别产生两组AM-AM和AM-PM参考样本。从样品中确定分别代表AM-AM和AM-PM特性的两系列多项式。每个多项式的确定允许多项式的二阶导数和由多项式定义的曲线上的样本和点之间的距离。

2. 发明授权

US06208698B1 Quadrature modulator imbalance estimator and modulator stage using it 失效
标题翻译：正交调制器不平衡估计器和调制器级使用它
公开(公告)号：US06208698B1
公开(公告)日：2001-03-27
申请号：US08956443
申请日：1997-10-23
申请人： Rossano Marchesani , Jean-Xavier Canonici
发明人： Rossano Marchesani , Jean-Xavier Canonici
IPC分类号： H04L2736
CPC分类号： H04L27/364 , H04L27/2071
摘要： An imbalance estimator for quadrature modulators comprising two mixers to which are applied two carrier signals and to each of which is applied a modulating signal, output signals of said mixers being applied to a combiner to constitute a modulated signal, detects the instantaneous power of the modulated signal. The detected instantaneous power is multiplied by the modulating signals, and the resulting signals are rectified. The rectified signals are rectified to supply signals indicative of the imbalance of the modulator.
摘要翻译：一种用于正交调制器的不平衡估计器，包括两个混频器，其中施加两个载波信号，并且每个混频器施加调制信号，所述混频器的输出信号被施加到组合器以构成调制信号，检测调制信号的瞬时功率信号。检测到的瞬时功率乘以调制信号，结果信号得到纠正。整流的信号被整流以提供指示调制器的不平衡的信号。

3. 发明授权

US5943380A Robust phase estimator and recoverer for digital signals affected in particular by phase jitter 失效
标题翻译：对于特别受相位抖动影响的数字信号的稳健相位估计器和恢复器
公开(公告)号：US5943380A
公开(公告)日：1999-08-24
申请号：US829511
申请日：1997-03-28
申请人： Rossano Marchesani , Pierre Roux , Gilles de Villenaut
发明人： Rossano Marchesani , Pierre Roux , Gilles de Villenaut
IPC分类号： H04L27/00 , H04L27/227 , H03D3/24
CPC分类号： H04L27/2273 , H04L2027/0044 , H04L2027/0067
摘要： The invention relates to apparatus for synchronizing the phase of a digital signal constituted by two digital components to be corrected defining two samples of a received signal at each symbol time, said apparatus serving to feed a regenerator for regenerating the signal in baseband by sampling and threshold decision-taking, said apparatus including: a first phase-locked loop (31) driven by a first broadband phase-error integrator (37), said first loop (31) being fed with the input signal (30) of the apparatus, and supplying a first phase error estimate (36); and an auxiliary second phase-locked structure (32) driven by re-processing means (38) for re-processing said first phase error estimate (36) established by said first phase-locked loop (31), and outputting a phase synchronized signal fed to an output regenerator (34) for regenerating the signal in baseband; said auxiliary second phase-locked structure (32) being fed with said input signal (30) of the apparatus via delay means (35).
摘要翻译：本发明涉及用于在每个符号时间同步由要被校正的两个数字分量的数字信号的相位定义两个采样的接收信号的装置，所述装置用于馈送再生器，用于通过采样和阈值再现基带中的信号所述装置包括：由第一宽带相位误差积分器（37）驱动的第一锁相环（31），所述第一环路（31）馈送设备的输入信号（30），以及提供第一相位误差估计（36）; 以及由再处理装置（38）驱动的辅助第二锁相结构（32），用于重新处理由所述第一锁相环（31）建立的所述第一相位误差估计（36），并输出相位同步信号馈送到输出再生器（34），用于在基带中再生信号; 所述辅助第二锁相结构（32）通过延迟装置（35）馈送装置的所述输入信号（30）。

4. 发明授权

US5883551A Quadrature modulator malfunction estimator and modulator stage using it 失效
标题翻译：正交调制器故障估计器和使用它的调制器级
公开(公告)号：US5883551A
公开(公告)日：1999-03-16
申请号：US969154
申请日：1997-11-12
申请人： Rossano Marchesani , Jean-Xavier Canonici
发明人： Rossano Marchesani , Jean-Xavier Canonici
IPC分类号： H04L27/20 , H04L27/00 , H04L27/36
CPC分类号： H04L27/364 , H04L2027/0016
摘要： A quadrature modulator including two mixers to which two carrier signals are applied and to each of which a modulating signal is applied, output signals of the mixers being applied to a combiner to constitute a modulated signal. A defect estimator for the modulator detects a first signal representative of the instantaneous power of the modulated signal, generates a second signal representative of a reference envelope obtained from the modulating signals, and corrects the amplitude of one of the first and second signals in accordance with the mean amplitude difference observed between this amplitude corrected signal and the other signal. A processor supplies from the observed amplitude difference between the amplitude corrected signal and the other signal, at least one signal relating to the defect.
摘要翻译：一种正交调制器，包括两个施加两个载波信号的混频器，并且其中施加调制信号的每个混频器将混频器的输出信号施加到组合器以构成调制信号。用于调制器的缺陷估计器检测表示调制信号的瞬时功率的第一信号，产生表示从调制信号获得的参考包络的第二信号，并且根据调制信号校正第一和第二信号之一的振幅在该幅度校正信号与另一信号之间观察到的平均振幅差。处理器从观测到的幅度校正信号和另一信号之间的振幅差提供与缺陷有关的至少一个信号。

5. 发明授权

US5790600A Method of compensating differences in group propagation times between the analog filters of a transmitter and between those of a receiver for signals in phase quadrature corresponding compensation apparatus and a corresponding transmission system 失效
标题翻译：用于补偿发射机的模拟滤波器之间的组传播时间差异以及相位正交相应的补偿装置中的信号的接收机的差异的方法和相应的传输系统
公开(公告)号：US5790600A
公开(公告)日：1998-08-04
申请号：US789996
申请日：1997-01-28
申请人： Rossano Marchesani , Pierre Roux , Jean-Francois Houplain
发明人： Rossano Marchesani , Pierre Roux , Jean-Francois Houplain
IPC分类号： H04L25/03 , H04L27/00
CPC分类号： H04L25/03114
摘要： The invention relates in particular to a method of compensating differences in group propagation times between first and second analog filters of a transmitter of signals in phase quadrature, and between third and fourth analog filters of a receiver of signals in phase quadrature. The method consists in: applying the output signals from the first and second filters respectively to the third and fourth analog filters so as to measure a time difference .DELTA.1 equal to: �Tx+Rx!-�Ty+Ry! where Tx, Rx, Ty, and Ry are respective propagation times for the signals through the first, second, third, and fourth filters; applying the output signals from the first and second filters respectively to the fourth and third analog filters so as to measure a time difference .DELTA.2 equal to: �Ty+Rx!-�Tx+Ry! and determining weighting coefficients from the differences .DELTA.1 and .DELTA.2 for application to digital filters in series with said analog filters so as to compensate the group propagation time differences respectively between the first and second analog filters and between the third and fourth analog filters.
摘要翻译：本发明特别涉及一种补偿相位正交信号发射机的第一和第二模拟滤波器之间以及相位正交信号的接收机的第三和第四模拟滤波器之间的组传播时间差异的方法。该方法包括：将来自第一和第二滤波器的输出信号分别施加到第三和第四模拟滤波器，以便测量等于：[Tx + Rx] - [Ty + Ry]的时差DELTA，其中Tx，Rx Ty和Ry分别是通过第一，第二，第三和第四滤波器的信号的传播时间; 将来自第一和第二滤波器的输出信号分别施加到第四和第三模拟滤波器，以测量等于：[Ty + Rx] - [Tx + Ry]的时差DELTA 2，并根据差ΔTA1确定加权系数和DELTA 2，用于与所述模拟滤波器串联的数字滤波器，以分别补偿第一和第二模拟滤波器之间以及第三和第四模拟滤波器之间的组传播时间差。

6. 发明授权

US5533063A Method and apparatus for multipath channel shaping 失效
标题翻译：用于多路径通道整形的方法和装置
公开(公告)号：US5533063A
公开(公告)日：1996-07-02
申请号：US189959
申请日：1994-01-31
申请人： Sanjit K. Mitra , Eduardo Abreu , Rossano Marchesani
发明人： Sanjit K. Mitra , Eduardo Abreu , Rossano Marchesani
IPC分类号： H04L25/03 , H03D1/00
CPC分类号： H04L25/03057
摘要： A method and apparatus for shaping the impulse response of a non-minimum phase communications channel, by reversing the CIR without enhancing the noise level using non-causal allpass filters is disclosed. Unstable allpass filters are implemented as stable non-causal filters operating in reversed time to obtain a minimum phase response from a non-minimum phase CIR. The original CIR is estimated using adaptive algorithms, and the coefficients of the allpass filters are taken directly from the estimated CIR. The cascade of the channel and allpass filter has an impulse response that is the approximate time reversed version of the original CIR. A "block" allpass equalizer and an "optimal" allpass equalizer are used in a two-stage filter to increase system performance. Other multiple stage filter configurations are disclosed, which can include use of decision feedback equalizer (DFE) decoders as well as Viterbi decoders. The invention is effective in the case of two-path channels, but can also give satisfactory results when more paths are present. Moreover, the present invention is well suited to "sharpening" the CIR with only minor variations in noise level. A minimum phase desired impulse response (DIR) can be obtained with only a few nonzero samples, leading to a substantial reduction in complexity of the Viterbi algorithm, with only minor variations in the noise level.
摘要翻译：公开了一种通过使用非因果全通滤波器反转CIR而不增强噪声电平来整形非最小相位通信信道的脉冲响应的方法和装置。不稳定全通滤波器被实现为稳定的非因果滤波器，其在反向时间内操作以从非最小相位CIR获得最小相位响应。使用自适应算法估计原始CIR，并且从估计的CIR直接获取全通滤波器的系数。通道和全通滤波器的级联具有脉冲响应，是原始CIR的大致时间反转版本。一个“块”全通均衡器和“最优”全通均衡器用于两级过滤器以提高系统性能。公开了其他多级滤波器配置，其可以包括使用判决反馈均衡器（DFE）解码器以及维特比解码器。本发明在双路通道的情况下是有效的，但是当存在更多的路径时也可以获得令人满意的结果。此外，本发明非常适合于仅对噪声水平进行微小变化来“锐化”CIR。只有少数非零样本可获得最小相位期望脉冲响应（DIR），导致维特比算法的复杂度显着降低，噪声水平只有微小变化。

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