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1. 发明授权

US07720134B2 Frequency-domain multi-user access interference cancellation and nonlinear equalization in CDMA receivers 有权
标题翻译： CDMA接收机的频域多用户接入干扰消除和非线性均衡
公开(公告)号：US07720134B2
公开(公告)日：2010-05-18
申请号：US10842699
申请日：2004-05-10
申请人： Stefano Tomasin , Nevio Benvenuto , Fabio Osnato , Marco Odoni , Filippo Spalla
发明人： Stefano Tomasin , Nevio Benvenuto , Fabio Osnato , Marco Odoni , Filippo Spalla
IPC分类号： H04B1/00
CPC分类号： H04B1/7097
摘要： A wireless CDMA communication system receiver receives a stream of chips generated by spreading data symbols formed by grouping bits of information at a wireless CDMA communication transmitter which are broadcast at a certain chip-rate. The received chips are de-spread and symbols pertaining to respective users are reconstructed. The stream of chips are formatted into blocks of chips, and an iterative block decision feedback equalization is performed in a frequency domain at the chip-rate of the broadcast stream of chips to remove inter-symbol interference by defining a transfer function. The chips generated are interleaved by spreading each data symbol being transmitted before broadcasting the stream of interleaved chips in distinct blocks of chips.
摘要翻译：无线CDMA通信系统接收器通过扩展通过以特定码片速率广播的无线CDMA通信发射机对信息比特分组而形成的数据符号进行扩展生成的码片流。所接收的码片被解扩，并重建与各个用户相关的符号。芯片流被格式化成芯片块，并且在频域中以芯片速率的芯片速率在频域中执行迭代块判决反馈均衡，以通过定义传递函数来消除符号间干扰。所生成的码片通过在将不同的码片块广播交织的码片流之前扩展正在发送的每个数据符号进行交织。

2. 发明申请

US20050249269A1 Frequency-domain multi-user access interference cancellation and nonlinear equalization in CDMA receivers 有权
标题翻译： CDMA接收机的频域多用户接入干扰消除和非线性均衡
公开(公告)号：US20050249269A1
公开(公告)日：2005-11-10
申请号：US10842699
申请日：2004-05-10
申请人： Stefano Tomasin , Nevio Benvenuto , Fabio Osnato , Marco Odoni , Filippo Spalla
发明人： Stefano Tomasin , Nevio Benvenuto , Fabio Osnato , Marco Odoni , Filippo Spalla
IPC分类号： H04B1/707
CPC分类号： H04B1/7097
摘要： A method for canceling interference at a wireless code division multiple access (CDMA) communication receiver is provided. The wireless CDMA communication system receiver receives a stream of chips generated by spreading data symbols formed by grouping bits of information at a wireless CDMA communication transmitter which are broadcast at a certain chip-rate. The received chips are de-spread and symbols pertaining to respective users are reconstructed. The method includes formatting the stream of chips into blocks of chips, and performing an iterative block decision feedback equalization in a frequency domain at the chip-rate of the broadcast stream of chips to remove inter-symbol interference by defining a transfer function. The transfer function is defined based upon iteration cycles as a function of data detected in a preceding iteration cycle. The chips generated are interleaved by spreading each data symbol being transmitted before broadcasting the stream of interleaved chips in distinct blocks of chips.
摘要翻译：提供一种用于消除无线码分多址（CDMA）通信接收机的干扰的方法。无线CDMA通信系统接收机通过扩频通过以特定码片速率广播的无线CDMA通信发射机对信息组进行分组而形成的数据符号来接收所生成的芯片流。所接收的码片被解扩，并重建与各个用户相关的符号。该方法包括将芯片流格式化为芯片块，并以频域的芯片速率在频域中执行迭代块判定反馈均衡，以通过定义传递函数来消除符号间干扰。传递函数基于迭代周期来定义，作为在前一迭代循环中检测到的数据的函数。所生成的码片通过在将不同的码片块广播交织的码片流之前扩展正在发送的每个数据符号进行交织。

3. 发明授权

US06785861B2 Versatile serial concatenated convolutional codes 有权
标题翻译：通用串行级联卷积码
公开(公告)号：US06785861B2
公开(公告)日：2004-08-31
申请号：US09781130
申请日：2001-02-09
申请人： Fabio Scalise , Fabio Osnato , Stefano Valle , Massimiliano Siti , Sergio Benedetto
发明人： Fabio Scalise , Fabio Osnato , Stefano Valle , Massimiliano Siti , Sergio Benedetto
IPC分类号： H03M1300
CPC分类号： H03M13/2972 , H03M13/256 , H03M13/2789 , H03M13/6362
摘要： An input digital signal is encoded by subjecting it to a first convolutional coding step followed by an interleaving step and a second convolutional coding step. The serial concatenated convolutional coded signal thus obtained is then subjected to modulation by means of a two-dimensional modulation scheme such as M-PSK or M-QAM. The corresponding decoding process involves an iterative decoding algorithm based on cascaded logarithmic soft-input soft-output processing steps.
摘要翻译：通过对输入数字信号进行经过交织步骤和第二卷积编码步骤的第一卷积编码步骤进行编码。然后通过诸如M-PSK或M-QAM的二维调制方案对如此获得的串行级联卷积编码信号进行调制。相应的解码过程涉及基于级联对数软输入软输出处理步骤的迭代解码算法。

4. 发明申请

US20070033476A1 Method and system for decoding signals, corresponding receiver and computer program product 有权
标题翻译：解码信号的方法和系统，对应的接收机和计算机程序产品
公开(公告)号：US20070033476A1
公开(公告)日：2007-02-08
申请号：US11450920
申请日：2006-06-09
申请人： Fabio Osnato , Devis Gatti , Alessandro Tomasoni
发明人： Fabio Osnato , Devis Gatti , Alessandro Tomasoni
IPC分类号： H04L1/00 , G08C25/00 , H03M13/00 , G06F11/00 , G06F11/30
CPC分类号： H04L1/0066 , H04L1/005 , H04L1/0618 , H04L27/2601
摘要： A system for the transmission of signals comprises a transmitter configured for transmitting signals xt, encoded with a mapping, with different and separable configurations in the real part and the imaginary part of the signal. These may be, for example, signals xt encoded according to a Gray mapping, signals xt encoded with two QAM mappings, encoded signals xt transmitted on a selective Multiple-Input/Multiple-Output (MIMO) channel and/or encoded signals xt multiplexed with an Orthogonal-Frequency-Division-Multiplexing (OFDM) technique. The corresponding receiver is configured for decoding in a distinct way the real part R(xt) and the imaginary part I(xt) of said signals, and typically comprises a filter for subjecting said encoded signals xt to a Wiener filtering {circumflex over (x)}t, and a Minimum-Mean-Square-Error (MMSE) detector configured for minimizing the mean-square error between said encoded signals xt and the result of said Wiener filtering {circumflex over (x)}t. The receiver can comprise a soft decoder for performing a soft estimation of the signals transmitted by each of said antennas of said plurality, and cancelling, using the results of said soft estimation, the interference produced on the signals transmitted from each of said antennas of said plurality by the signals transmitted from the other antennas of said plurality.
摘要翻译：用于信号传输的系统包括：发射机，被配置为在信号的实部和虚部中以不同的和可分离的配置传输用映射编码的信号。这些可以是例如根据Gray映射编码的信号x T，其中用两个QAM映射编码的信号x T t，编码信号x SUB 在与正交频分复用（OFDM）技术复用的选择性多输入/多输出（MIMO）信道和/或编码信号x T上进行传输。相应的接收机被配置用于以不同的方式解码所述信号的实部R（x，t）和虚部I（x t），并且通常包括滤波器，用于对所述编码信号x T进行维纳滤波xT，以及最小均方误差（MMSE）检测器，其被配置为使均方误差最小化在所述编码信号x T t和所述Wiener滤波x T t的结果之间。接收机可以包括软解码器，用于对所述多个天线中的每个天线发送的信号执行软估计，并且使用所述软估计的结果来取消从对所述多个天线的每个所述天线发送的信号产生的干扰通过从所述多个的其他天线发送的信号来进行多路复用。

5. 发明授权

US06169507A Stabilization of single loop sigma-delta modulators of a high order 有权
标题翻译：高阶单环Σ-Δ调制器的稳定化
公开(公告)号：US06169507A
公开(公告)日：2001-01-02
申请号：US09277874
申请日：1999-03-29
申请人： Marco Bianchessi , Sandro Dalle Feste , Nadia Serina , Marco Angelici , Fabio Osnato
发明人： Marco Bianchessi , Sandro Dalle Feste , Nadia Serina , Marco Angelici , Fabio Osnato
IPC分类号： H03M302
CPC分类号： H03M3/434
摘要： A sigma-delta modulator of second or higher order includes two or more integrating stages, and a comparator connected in cascade to the integration stages. A signal having a logic level +1 is generated when an input signal to the sigma-delta modulator is positive, and a signal having a logic value −1 is generated when the input signal is negative. Regardless of its absolute value, a feedback line includes a low-pass filter and an adder circuit for adding a feedback signal. The signal output by the last of the integrating stages is filtered by the low-pass filter. The sigma-delta modulator further includes a second comparator having an input connected in common to the input of the first comparator and an output connected to an input of the low-pass filter. The second comparator outputs a logic signal having a positive value when the input signal is positive, and outputs a logic signal having a negative value when the input signal is negative. The second comparator also outputs a signal having an increasing logic level when the input signal exceeds one or more predefined thresholds of increasing value.
摘要翻译：第二或更高阶的Σ-Δ调制器包括两个或更多个积分级，以及一个级联连接到积分级的比较器。当向Σ-Δ调制器的输入信号为正时，产生具有逻辑电平+1的信号，并且当输入信号为负时产生具有逻辑值-1的信号。无论其绝对值如何，反馈线包括用于添加反馈信号的低通滤波器和加法器电路。最后一个积分级输出的信号由低通滤波器滤波。 Σ-Δ调制器还包括第二比较器，其具有与第一比较器的输入共同连接的输入端和连接到低通滤波器的输入端的输出端。当输入信号为正时，第二比较器输出具有正值的逻辑信号，并且当输入信号为负时输出具有负值的逻辑信号。当输入信号超过增加值的一个或多个预定阈值时，第二比较器还输出具有增加的逻辑电平的信号。

6. 发明授权

US08069399B2 Method and system for decoding signals, corresponding receiver and computer program product 有权
标题翻译：解码信号的方法和系统，对应的接收机和计算机程序产品
公开(公告)号：US08069399B2
公开(公告)日：2011-11-29
申请号：US11450920
申请日：2006-06-09
申请人： Fabio Osnato , Devis Gatti , Alessandro Tomasoni
发明人： Fabio Osnato , Devis Gatti , Alessandro Tomasoni
IPC分类号： H03M13/03 , G06F11/00
CPC分类号： H04L1/0066 , H04L1/005 , H04L1/0618 , H04L27/2601
摘要： A method and system for decoding signals includes a transmitter configured for transmitting signals encoded with a mapping, with different and separable configurations in a real part and an imaginary part of the signal. The signals may be encoded according to a Gray or QAM mapping, and may be transmitted on a selective MIMO channel and/or multiplexed with an OFDM technique. The corresponding receiver is configured for decoding the real part and the imaginary part of the signals separately, and may include a filter for subjecting the encoded signals to a Wiener filtering and a MMSE detector for minimizing the mean-square error between the encoded signals and the result of the Wiener filtering. The receiver may also include a soft decoder for performing a soft estimation of the signals and cancelling, using the results of the soft estimation, an interference produced on the signals.
摘要翻译：一种用于解码信号的方法和系统包括发射机，被配置为用于发射用映射编码的信号，在信号的实部和虚部具有不同的和可分离的配置。信号可以根据Gray或QAM映射进行编码，并且可以在选择性MIMO信道上传输和/或与OFDM技术复用。相应的接收机被配置为分别解码信号的实部和虚部，并且可以包括用于对编码信号进行维纳滤波的滤波器和用于最小化编码信号与编码信号之间的均方误差的MMSE检测器 Wiener过滤的结果。接收机还可以包括用于执行信号的软估计的软解码器，并且使用软估计的结果取消对信号产生的干扰。

7. 发明授权

US07210075B2 Prunable S-random block interleaver method and corresponding interleaver 有权
标题翻译：可修复的S随机块交织器方法和相应的交织器
公开(公告)号：US07210075B2
公开(公告)日：2007-04-24
申请号：US10143531
申请日：2002-05-09
申请人： Marco Ferrari , Massimiliano Siti , Stefano Valle , Fabio Osnato , Fabio Scalise
发明人： Marco Ferrari , Massimiliano Siti , Stefano Valle , Fabio Osnato , Fabio Scalise
IPC分类号： G06F11/00
CPC分类号： H03M13/2957 , H03M13/2746 , H03M13/2771 , H03M13/2789
摘要： A method for designing a new prunable S-random interleaver class to be used as a constituent part of turbo codes. With respect to previously proposed solutions the method has the advantage of being prunable to different block sizes while exhibiting at the same time, for any considered block size, performance comparable with the optimized “ad hoc” S-random interleavers. Another advantage is that, as for every S-random interleaver, the design rules are independent of the constituent codes and of the puncturing rate applied to the turbo code. Therefore, these interleavers potentially can find applications in any turbo code scheme that requires interleaver size flexibility and code rate versatility, thanks to the advantage of requiring a single law storage (i e., one ROM storage instead of several ROMs) from which all the others are obtained by pruning, without compromising the overall error rate performance.
摘要翻译：一种用于设计新的可修剪的S随机交织器类的方法，以用作turbo码的组成部分。对于先前提出的解决方案，该方法的优点是可以同时展现不同的块大小，对于任何考虑的块大小，与优化的“ad hoc”S随机交织器相当的性能。另一个优点是，对于每个S随机交织器，设计规则独立于构成码和应用于turbo码的打孔率。因此，这些交织器潜在地可以在需要交织器大小灵活性和代码率多功能性的任何turbo码方案中找到应用，这得益于需要单一定律存储（即，一个ROM存储而不是几个ROM）的优点，其他人通过修剪获得，而不会影响整体错误率性能。

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