公开(公告)号：US5493587A

公开(公告)日：1996-02-20

申请号：US097675

申请日：1993-07-27

申请人： Andrea Sandri ,  Arnaldo Spalvieri

发明人： Andrea Sandri ,  Arnaldo Spalvieri

IPC分类号： H04L27/34 ,  H04B15/00

CPC分类号： H04L27/3411

摘要： The invention relates to a method of reducing the peak power of a signal at the output of the transmit filter of a digital link, e.g. a microwave link. The invention is characterized by the use of a coding in transmission and a decoding in reception, adapted to reduce the peak power of the filtered signal. In the disclosed embodiment, not intended to be limiting, the encoder and the decoder can be realized through simple maps insertable in the baseband part of the system.

摘要翻译： 本发明涉及一种降低数字链路的发射滤波器的输出处的信号的峰值功率的方法，例如， 微波链接。 本发明的特征在于使用传输中的编码和接收中的解码，适于降低滤波信号的峰值功率。 在所公开的实施例中，不想限制，编码器和解码器可以通过可插入到系统的基带部分中的简单地图来实现。

公开(公告)号：US06240134B1

公开(公告)日：2001-05-29

申请号：US09132444

申请日：1998-08-11

申请人： Andrea Sandri ,  Carlo Luschi ,  Arnaldo Spalvieri

发明人： Andrea Sandri ,  Carlo Luschi ,  Arnaldo Spalvieri

IPC分类号： H03H730

CPC分类号： H04L25/03044

摘要： A method and/or system for the stable operation of fractionally spaced equalizers available in digital signal receivers, having a plurality of equalization coefficients, said equalization coefficients being updatableby minimizing a proper cost function and stabilizable through a proper change of said cost function, said change of said cost function requiring the use of a virtual noise matrix. According to the invention, the cost function (J) for the updating of the coefficients of the fractionally spaced equalizer (FSE) is changed by adding a cyclostationary virtual interference [v(t)].

摘要翻译： 一种用于在数字信号接收机中可用的分数间隔均衡器的稳定操作的方法和/或系统，具有多个均衡系数，所述均衡系数可通过最小化适当的成本函数并通过所述成本函数的适当变化而可稳定地更新，所述变化 的所述成本函数需要使用虚拟噪声矩阵。 根据本发明，通过添加循环平稳虚拟干扰[v（t）]来改变用于更新分数间隔均衡器（FSE）的系数的成本函数（J）。

公开(公告)号：US5608760A

公开(公告)日：1997-03-04

申请号：US506929

申请日：1995-07-26

申请人： Andrea Sandri ,  Arnaldo Spalvieri ,  Franco Guglielmi

发明人： Andrea Sandri ,  Arnaldo Spalvieri ,  Franco Guglielmi

IPC分类号： H04B1/04 ,  H04L27/18 ,  H04L27/34 ,  H04B15/00

CPC分类号： H04L27/3411

摘要： Efficiency of a digital link, e.g., a microwave link, is improved by coding numeric signals for transmission so as to transmit selected sequences, in terms of peak power of a filtered signal, for transmission through the link. The most favorable numeric sequences may be encoded by baseband numeric coding.

摘要翻译： 数字链路（例如微波链路）的效率通过对用于传输的数字信号进行编码来改进，以便根据滤波信号的峰值功率传输所选择的序列以便通过链路进行传输。 最有利的数字序列可以由基带数字编码编码。

公开(公告)号：US09794103B2

公开(公告)日：2017-10-17

申请号：US12109166

申请日：2008-04-24

申请人： Marco Odoni ,  Arnaldo Spalvieri

发明人： Marco Odoni ,  Arnaldo Spalvieri

IPC分类号： H04B7/02 ,  H04L1/02 ,  H04L27/34 ,  H04L25/00 ,  H04L27/26

CPC分类号： H04L27/34 ,  H04L25/00 ,  H04L27/2601

摘要： A method of detecting sequences of multi-level encoded symbols. The multi-level encoded symbols are mapped and modulated with a modulation scheme having a number of constellation points identified by a sequence of bits arranged in at least a first and a second group. The first group is encoded with a first encoding scheme, and the second group is encoded with a second coding scheme, and the multi-level encoded symbols are transmitted by multiple transmitting sources and received as a received vector by multiple receiving elements.A first set of candidate sequences is selected and a first set of probability information is calculated for the first set of candidate sequences. Then the first group of bits of the symbols are decoded. The decoded bits of the first group are re-encoded and used to select a sub-set of constellation points.A second set of candidate sequences is selected based on this sub-set of constellation points and a second set of probability information is calculated for the second set of candidate sequences. Finally, the second group of bits of the symbols are decoded.

公开(公告)号：US06983143B2

公开(公告)日：2006-01-03

申请号：US09987984

申请日：2001-11-16

申请人： Morena Ferrario ,  Giovanni Mendola ,  Roberto Pellizzoni ,  Roberto Valtolina ,  Arnaldo Spalvieri

发明人： Morena Ferrario ,  Giovanni Mendola ,  Roberto Pellizzoni ,  Roberto Valtolina ,  Arnaldo Spalvieri

IPC分类号： H04Q7/20

CPC分类号： H04L1/208 ,  H04B17/309 ,  H04L1/0054 ,  H04L1/22

摘要： A method is described for managing and monitoring the performances in digital radio systems. The idea of the invention provides for identifying the type of distorting phenomenon that possibly affects the monitored radio channel; in this way it is also possible to univocally connect, apart from the cause of degrade, the system performances with one of the performance monitoring methods commonly usable. In practice, the invention utilizes two distinct thresholds, each specific to the related corrupting source, and above all it provides an effective technique for discriminating which of the two thresholds is to be compared with the measure of the quality chosen. In a first preferred embodiment of the invention, the type of distortion present in the channel is identified on the basis of the error autocorrelation test at the threshold decision circuit.

公开(公告)号：US5751768A

公开(公告)日：1998-05-12

申请号：US588348

申请日：1996-01-18

申请人： Franco Guglielmi ,  Carlo Luschi ,  Arnaldo Spalvieri

发明人： Franco Guglielmi ,  Carlo Luschi ,  Arnaldo Spalvieri

IPC分类号： H03H17/00 ,  H04B3/06 ,  H04L25/03 ,  H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03044 ,  H04L2025/03509 ,  H04L2025/03617

摘要： The present invention relates to a method of fractionally spaced adaptive equalization which allows the achievement of the performances of the optimal linear receiver with a high degree of stability of the control algorithms. The technique is applicable to a generic communication system. The present method provides a fractionally spaced equalizer which is perfectly stable and has a good convergence rate without introducing any deterioration of the performances with respect to the optimal receiver and with an extremely low increase in the complexity of realization as compared to the prior art techniques. The invention is based upon the introduction of a whitening filter of the input signal to a fractionally spaced equalizer stabilized with the tap-leakage technique, where the whitening filter is a device able to make the power spectrum density of the signal--repeated with a period equal to the reciprocal of the signalling interval--constant.

摘要翻译： 本发明涉及一种分数间隔自适应均衡的方法，其允许以控制算法的高度稳定性实现最佳线性接收机的性能。 该技术适用于通用通信系统。 本方法提供了一种分数间隔的均衡器，其是完全稳定的并且具有良好的收敛速度，而不会相对于最佳接收机引入性能的任何劣化，并且与现有技术相比，实现的复杂度的极小增加。 本发明基于将输入信号的白化滤波器引入到利用抽头泄漏技术稳定的分数间隔的均衡器，其中白化滤波器是能够使信号重复的功率谱密度具有周期的装置 等于信令间隔常数的倒数。

公开(公告)号：US5327093A

公开(公告)日：1994-07-05

申请号：US6805

申请日：1993-01-21

申请人： Maurizio Bolla ,  Leonardo Rossi ,  Arnaldo Spalvieri

发明人： Maurizio Bolla ,  Leonardo Rossi ,  Arnaldo Spalvieri

IPC分类号： H04B1/26 ,  H04B7/10 ,  H04J11/00 ,  H04L27/22 ,  H03D3/00 ,  H03L7/07 ,  H04B1/12

CPC分类号： H04B7/10

摘要： The present invention concerns a method and a system for demodulating mutually interfering signals according to a suitable synchronism bond between said signals. With such a system a complete decoupling of the demodulators of said signals is obtained. The system is characterized in that on each polarization there is at least a pair of demodulators, a first pair operate a baseband conversion of both signal H and V using the carrier recovery circuit driven by data of one of the two signals (e.g. V) and a second pair operate still a baseband conversion of both signals H and V but using said carrier recovery circuit now driven by data of the other signal (e.g. H).

摘要翻译： 本发明涉及一种用于根据所述信号之间的适当的同步键解调相互干扰信号的方法和系统。 利用这种系统，可以获得所述信号的解调器的完全解耦。 该系统的特征在于，在每个极化上，至少有一对解调器，第一对使用由两个信号（例如V）之一的数据驱动的载波恢复电路来操作信号H和V两者的基带转换，并且 第二对仍然操作信号H和V的基带转换，但是使用现在由其他信号（例如H）的数据驱动的所述载波恢复电路。

公开(公告)号：US07274715B2

公开(公告)日：2007-09-25

申请号：US09833666

申请日：2001-04-13

申请人： Massimo Brioschi ,  Roberto Pellizzoni ,  Roberto Valtolina ,  Arnaldo Spalvieri

发明人： Massimo Brioschi ,  Roberto Pellizzoni ,  Roberto Valtolina ,  Arnaldo Spalvieri

IPC分类号： H04J3/06

CPC分类号： H04B7/0845 ,  H04B7/0894

摘要： A method and apparatus is described for the automatic delay compensation in space diversity radio transmissions. The method includes the steps of: a) receiving a first analog signal and a second analog signal, a possible delay being between the first and second signals; b) sampling the first and the second analog signals to obtain a first digital signal and a second digital signal, respectively; c) sending the digital signals to respective equalizers, and the steps of d) digitally delaying one of the first digital signal and the second digital signal by a period equal to an integral multiple of the sampling period, and e) recoverying, at the equalization phase, the residual difference between the imposed delay and the actual one.

摘要翻译： 描述了用于空间分集无线电传输中的自动延迟补偿的方法和装置。 该方法包括以下步骤：a）接收第一模拟信号和第二模拟信号，可能的延迟在第一和第二信号之间; b）对第一和第二模拟信号进行采样以分别获得第一数字信号和第二数字信号; c）将数字信号发送到相应的均衡器，以及d）数字地延迟第一数字信号和第二数字信号之一等于采样周期的整数倍的周期，以及e）在均​​衡处恢复 相位，实际延迟与实际延迟之间的残差。

公开(公告)号：US07272195B2

公开(公告)日：2007-09-18

申请号：US10695768

申请日：2003-10-30

申请人： Alessandro Colombo ,  Arnaldo Spalvieri ,  Roberto Valtolina

发明人： Alessandro Colombo ,  Arnaldo Spalvieri ,  Roberto Valtolina

IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H04L1/0057 ,  H04L1/0041 ,  H04L27/3411

摘要： Disclosed is a method for controlling the peak power of a filtered signal in a single carrier data transmission system. The method comprises the steps of receiving a digital sequence (13) from a data source; generating a new digital sequence (a(k)); shaping filtering (34) the new digital sequence (a(k)) and producing a filtered digital sequence (y(k)) Characterized in that the step of generating a new digital sequence (a(k)) comprises the steps of: encoding data by an algebraic error correcting code (28); and performing a bit modification (30) by deliberately adding errors in such a way that the peak power of the filter signal affected by the deliberately introduced errors is lower than the peak power of the signal unaffected by errors. Disclosed is also a circuit for performing the method.

摘要翻译： 公开了一种用于在单载波数据传输系统中控制滤波信号的峰值功率的方法。 该方法包括从数据源接收数字序列（13）的步骤; 生成新的数字序列（a（k））; 对所述新的数字序列（a（k））进行整形滤波（34）并产生滤波的数字序列（y（k）），其特征在于，生成新的数字序列（a（k））的步骤包括以下步骤： 数据通过代数纠错码（28）; 并且通过故意地添加误差来执行位修改（30），使得受故意引入的误差影响的滤波器信号的峰值功率低于不受误差影响的信号的峰值功率。 公开了一种用于执行该方法的电路。

公开(公告)号：US07035362B2

公开(公告)日：2006-04-25

申请号：US10090749

申请日：2002-03-06

申请人： Morena Ferrario ,  Roberto Pellizzoni ,  Roberto Valtolina ,  Arnaldo Spalvieri

发明人： Morena Ferrario ,  Roberto Pellizzoni ,  Roberto Valtolina ,  Arnaldo Spalvieri

IPC分类号： H04L7/00 ,  H04B1/10 ,  H04B17/02

CPC分类号： H04L1/06 ,  H04B7/0845 ,  H04L7/0083 ,  H04L7/0334 ,  H04L7/0335

摘要： Described is a method for the clock-pulse selection in a baseband combiner of a space-diversity receiver. The method provides for driving the clock recovery circuit by means of the main signal, filtered and sampled, or by the diversity signal, filtered and sampled as well, and it is characterized by calculating the average power of the equalized main signal and the average power of the equalized diversity signal; and by driving the clock recovery circuit by means of the signal chosen according to a comparison between the average powers of the signals at the output of the equalizers. Advantageously, the invention provides for a hysteresis on the power comparison and guarantees a soft change with respect to the selection performed at the preceding time of processing.