公开(公告)号：US20130003812A1

公开(公告)日：2013-01-03

申请号：US13520028

申请日：2009-12-30

申请人： Ivano Salvatore Collotta ,  Gian Michele Dell'Aera ,  Bruno Melis ,  Fabio Mondin ,  Paolo Priotti

发明人： Ivano Salvatore Collotta ,  Gian Michele Dell'Aera ,  Bruno Melis ,  Fabio Mondin ,  Paolo Priotti

IPC分类号： H04B7/06 ,  H04B17/00

CPC分类号： H04B7/0417 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0697

摘要： A method for selecting a precoding matrix to be used in a MIMO communication system includes a transmitter, a receiver and a communication channel, wherein the precoding matrix is used by the transmitter to precode codewords to be transmitted to the receiver over the communication channel. At the receiver, an optimum precoding matrix within a codebook of precoding matrices is determined on the base of a metric related to the power of received signal layers. An indication is then fed back from the receiver to the transmitter useful to enable the transmitter to select the optimum precoding matrix from the codebook.

摘要翻译： 用于选择要在MIMO通信系统中使用的预编码矩阵的方法包括发射机，接收机和通信信道，其中，所述预编码矩阵由所述发射机用于通过所述通信信道对要发送到所述接收机的码字进行预编码。 在接收机处，在与接收信号层的功率相关的度量的基础上确定预编码矩阵码本内的最佳预编码矩阵。 然后，指示从接收机反馈到发射机，有助于使发射机从码本中选择最佳预编码矩阵。

公开(公告)号：US20110026418A1

公开(公告)日：2011-02-03

申请号：US12809530

申请日：2007-12-19

申请人： Loris Bollea ,  Valeria D'Amico ,  Mauzizio Fodrini ,  Paolo Gallo ,  Bruno Melis ,  Alfredo Ruscitto

发明人： Loris Bollea ,  Valeria D'Amico ,  Mauzizio Fodrini ,  Paolo Gallo ,  Bruno Melis ,  Alfredo Ruscitto

IPC分类号： H04L12/26

CPC分类号： H01Q3/2605 ,  H01Q1/2258

摘要： A system for processing an RF signal received via a plurality of antenna elements includes a connection arrangement for selecting a sub-set of a given number of RF signals received from the antenna elements as well as a processing arrangement for combining the received RF signals of the selected sub-set into a single RF signal for demodulation. The system includes an RF phasing circuit for producing selective combinations of the received RF signals by applying relative RF phase shift weights to the RF signals that are combined; each combination includes RF signals received from a number of adjacent antenna elements equal to the number of the RF signals in the sub-set to be selected. A radio performance estimator generates for each selective combination of RF signals at least one non-RF radio performance indicator representative of the quality of the RF signals in the combination. A decision block identifies the sub-set of received RF signals to be selected as a function of the one radio performance indicator generated for the selective combinations of the received RF signals.

摘要翻译： 用于处理经由多个天线元件接收的RF信号的系统包括用于选择从天线元件接收的给定数量的RF信号的子集的连接装置，以及用于将接收的RF信号 选择的子集合成单个RF信号进行解调。 该系统包括RF定相电路，用于通过对组合的RF信号施加相对RF相移权重来产生所接收的RF信号的选择性组合; 每个组合包括从等于要选择的子集中的RF信号的数量的多个相邻天线元件接收的RF信号。 无线电性能估计器为RF信号的每个选择性组合生成表示组合中的RF信号的质量的至少一个非RF无线电性能指示符。 决定块识别要根据所接收的RF信号的选择性组合产生的一个无线电性能指标来选择接收的RF信号的子集。

公开(公告)号：US07848356B2

公开(公告)日：2010-12-07

申请号：US12226677

申请日：2006-04-27

申请人： Bruno Melis ,  Alfredo Ruscitto ,  Pietro Di Paola

发明人： Bruno Melis ,  Alfredo Ruscitto ,  Pietro Di Paola

IPC分类号： H04J1/00

CPC分类号： H04L25/022 ,  H04L25/0206 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0258 ,  H04L25/03159 ,  H04L25/03292 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/262 ,  H04L2025/03414

摘要： A channel estimator for use in a receiver node receiving signals from a plurality of user terminals wherein each user terminal is allotted a respective set of transmission subcarriers and respective test signal sequences for transmission over the channel to be estimated. The channel estimator has stored therein information as to the respective sets of transmission subcarriers allotted to the user terminals for transmission as well as the discrete spectra of the respective test signal sequences allotted to the user terminals. Upon receiving from a plurality of user terminals signals including the respective test signal sequences transmitted over the channel by using the respective sets of transmission subcarriers allotted thereto, the estimator generates the discrete spectrum of the combined test signal received and performs channel estimation as a function of the discrete spectrum of the combined test signal and the discrete spectra of the test signal sequences allotted to the user terminals. A frequency domain channel estimation is performed for a single carrier frequency division multiple access system.

摘要翻译： 一种用于接收来自多个用户终端的信号的接收机节点的信道估计器，其中每个用户终端分配相应的一组发射子载波和各个测试信号序列，以便在待估计的信道上传输。 信道估计器在其中存储关于分配给用户终端进行传输的各组发送子载波的信息以及分配给用户终端的各个测试信号序列的离散频谱。 在从多个用户终端接收包括通过使用分配给它们的各组发送子载波的通过信道发送的各个测试信号序列的信号时，估计器产生接收的组合测试信号的离散频谱，并且执行信道估计作为 组合测试信号的离散频谱和分配给用户终端的测试信号序列的离散频谱。 对单载波频分多址系统进行频域信道估计。

公开(公告)号：US20100022193A1

公开(公告)日：2010-01-28

申请号：US12084134

申请日：2005-10-27

申请人： Bruno Melis ,  Alfredo Ruscitto ,  Paolo Semenzato ,  Renata Mele ,  Giuseppe Grassano

发明人： Bruno Melis ,  Alfredo Ruscitto ,  Paolo Semenzato ,  Renata Mele ,  Giuseppe Grassano

IPC分类号： H04B1/38 ,  H04B7/02 ,  H04B1/06

CPC分类号： H04B7/0894 ,  H04B7/0671

摘要： A system for diversity processing a signal propagated via two diversity antennas includes: respective propagation paths for propagating two replicas of the signal, these propagation paths being coupled to the two diversity antennas so that the replicas are propagated via different antennas; a time variable delay element for subjecting at least one of the replicas to a time variable delay; and a level adjusting element, such as an asymmetric splitter, to produce a level imbalance between the power levels of the replicas propagated via the two diversity antennas.

摘要翻译： 用于分集处理经由两个分集天线传播的信号的系统包括：用于传播信号的两个副本的相应传播路径，这些传播路径耦合到两个分集天线，使得副本经由不同的天线传播; 用于使所述副本中的至少一个进行时间可变延迟的时间可变延迟元件; 以及诸如非对称分路器的电平调整元件，以在通过两个分集天线传播的副本的功率电平之间产生电平不平衡。

公开(公告)号：US07471754B2

公开(公告)日：2008-12-30

申请号：US10534993

申请日：2002-11-15

申请人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto

发明人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto

IPC分类号： H04L7/00

CPC分类号： H04B1/7085 ,  H04B1/70757

摘要： A method for the synchronization of a digital telecommunication receiver comprises the steps of:—storing a plurality of consecutive samples E−1, E, M, L, L+1 of an incoming spread spectrum signal in a delay line 56;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a first digitally controlled interpolator 26, an interpolated early sample (e) anticipating an optimal sampling time instant;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a second digitally controlled interpolator 24, an interpolated middle sample (m) corresponding to the optimal sampling time instant;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a third digitally controlled interpolator 28, an interpolated late sample (l) delayed with respect to the optimal sampling time instant;—calculating an error signal ξ as the difference between the energy of the symbols computed from the interpolated early sample (e) and the interpolated late (l) sample;—extracting the sign of the error signal ξ—accumulating the sign of the error signal ξ for the generation of control signals SE, SM, SL for controlling the interpolation phases of the digitally controlled interpolators used for determining the interpolated early (e), middle (m) and late (l) samples. The accumulated value has a positive saturation value of +4 and a negative saturation value of 4.

摘要翻译： 一种用于数字电信接收机的同步的方法包括以下步骤： - 在延迟线56中存储输入的扩频信号的多个连续采样E-1，E，M，L，L + 1; - 由 通过第一数字控制内插器26对输入的扩展频谱信号的连续样本进行内插，预测最佳采样时刻的内插早期采样（e）; - 通过对输入扩频信号的连续采样之间的内插，由 第二数字控制内插器24的装置，对应于最佳采样时刻的内插中间样本（m）; - 借助于第三数字控制内插器28，通过第三数字控制内插器28的连续采样之间的内插确定内插 相对于最佳采样时间瞬时延迟采样（l）; - 将误差信号xi计算为 从内插的早期采样（e）和内插后期采样（1）计算的符号的能量; - 提取误差信号xi的符号，累积误差信号xi的符号以产生控制信号SE，SM， SL用于控制用于确定内插的早期（e），中（m）和晚（l）样本的数字控制内插器的内插相位。 累积值的正饱和值为+4，负饱和值为4。

公开(公告)号：US20060133460A1

公开(公告)日：2006-06-22

申请号：US10534993

申请日：2002-11-15

申请人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto

发明人： Donato Ettorre ,  Maurizio Graziano ,  Bruno Melis ,  Andrea Finotello ,  Alfredo Ruscitto

IPC分类号： H04B1/707

CPC分类号： H04B1/7085 ,  H04B1/70757

摘要： A method for the synchronization of a digital telecommunication receiver comprises the steps of:—storing a plurality of consecutive samples E−1, B, M, 1, L+1 of an incoming spread spectrum signal in a delay line 56;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a first digitally controlled interpolator 26, an interpolated early sample (e) anticipating an optimal sampling time instant;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a second digitally controlled interpolator 24, an interpolated middle sample (m) corresponding to the optimal sampling time instant;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a third digitally controlled interpolator 28, an interpolated late sample (1) delayed with respect to the optimal sampling time instant;—calculating an error signal ξ as the difference between the energy of the symbols computed from the interpolated early sample (e) and the interpolated late (1) sample;—extracting the sign of the error signal ξ accumulating the sign of the error signal ξ for the generation of control signals SE, SM, SL for controlling the interpolation phases of the digitally controlled interpolators used for determining the interpolated early (e), middle (m) and late (I) samples. The accumulated value has a positive saturation value of +4 and a negative saturation value of 4.

摘要翻译： 一种用于数字电信接收机的同步的方法包括以下步骤： - 在延迟线56中存储输入扩频信号的多个连续样本E-1，B，M，1，L + 1; - 由 通过第一数字控制内插器26对输入的扩展频谱信号的连续样本进行内插，预测最佳采样时刻的内插早期采样（e）; - 通过对输入扩频信号的连续采样之间的内插，由 第二数字控制内插器24的装置，对应于最佳采样时刻的内插中间样本（m）; - 借助于第三数字控制内插器28，通过第三数字控制内插器28的连续采样之间的内插确定内插 晚样品（1）相对于最佳采样时刻延迟; - 计算误差信号xi作为差分 从内插的早期采样（e）和内插的较晚采样（1）中计算的符号的能量; - 提取积累误差信号xi的符号的误差信号xi的符号，以产生控制信号S E 用于控制用于确定内插的早期（e），中间（m）和后期的数字控制内插器的内插相位的S / S，S < （I）样品。 累积值的正饱和值为+4，负饱和值为4。

公开(公告)号：US09655132B2

公开(公告)日：2017-05-16

申请号：US14419597

申请日：2012-08-10

申请人： Marco Caretti ,  Giuseppe Catalano ,  Gian Michele Dell'Aera ,  Bruno Melis

发明人： Marco Caretti ,  Giuseppe Catalano ,  Gian Michele Dell'Aera ,  Bruno Melis

IPC分类号： H04W72/08 ,  H04W72/04 ,  H04W16/10 ,  H04W84/04

CPC分类号： H04W72/082 ,  H04W16/10 ,  H04W72/0426 ,  H04W84/045

摘要： A method for controlling a heterogeneous wireless network (100) is proposed. The heterogeneous wireless network comprises at least one first base station (115) which manages communication of a plurality of first user equipments (125M) positioned in at least one first cell (105) and at least one second base station (120) which manages communication of a plurality of second user equipments (125p) positioned in at least one second cell (110). Moreover, in the heterogeneous network (100), for each first user equipment (125M) the at least one first base station (115) provides a respective first allocation information set over a respective first allocation time interval. Similarly, the at least one second base station (120) provides for each second user equipment (125p) a respective second allocation information set over a respective second allocation time interval. Furthermore, each first allocation information set and each second allocation information set define transmission resources for communications of each first user equipment (125M) and of each second user equipment (125M), respectively. In the heterogeneous wireless network (100), the at least one second cell (110) is at least partially comprised in the first cell (105). The method comprises the following steps. Said at least one first base station determines (305) a set of probably interfering first user equipments (125M) with at least one of the plurality of second user equipments (125p). Said step of determining the set of probably interfering first user equipments (125M) comprises the following steps. Comparing each second allocation information set with each first allocation information set having the first allocation time interval at least partially overlapped with the respective second allocation time interval, and identifying as a probably interfering first user equipment (125M) each first user equipment (125M) for which a correspondence is verified in said comparing allocation information sets. The method further comprises the following steps. Said at least one second base station (120) defines a detection time window in order to analyze univocal identifiers transmitted by probably interfering first user equipments (125M) in said set. The method comprises identifying (315) a subset of effectively interfering first user equipments (125M) with the plurality of second user equipments (125p). Said at least one first base station (115) modifies (325) said transmission resources for at least one first user equipment (125M) comprised in the subset of effectively interfering first user equipments (125M) in order to mitigate interferences.

公开(公告)号：US09407400B2

公开(公告)日：2016-08-02

申请号：US13121641

申请日：2008-09-30

申请人： Daniele Franceschini ,  Bruno Melis ,  Alfredo Ruscitto

发明人： Daniele Franceschini ,  Bruno Melis ,  Alfredo Ruscitto

IPC分类号： H04L5/00 ,  H04L27/26

CPC分类号： H04L5/0005 ,  H04L5/006 ,  H04L5/0062 ,  H04L5/0085 ,  H04L5/0087 ,  H04L27/2626

摘要： Digital signals are transmitted over a communication channel having a given bandwidth, by simultaneously transmitting: one or more Spread Spectrum signals, such as, Code Division Multiple Access signals, wherein the spectrum of the Spread Spectrum signals exhibits roll-off transition bands at the boundaries of the spectrum, and one or more multi-carrier transmission signals, such as, Orthogonal Frequency Division Multiplexing signals, which are transmitted over the transition bands of the Spread Spectrum signals.

摘要翻译： 数字信号通过具有给定带宽的通信信道通过同时发射：一个或多个扩频信号，例如码分多址信号，其中扩频信号的频谱在边界处表现出滚降过渡带 以及在扩频信号的过渡频带上发送的一个或多个多载波传输信号，例如正交频分复用信号。

公开(公告)号：US08891386B2

公开(公告)日：2014-11-18

申请号：US13002218

申请日：2008-06-30

申请人： Loris Bollea ,  Bruno Melis ,  Roberto Rossi ,  Alfredo Ruscitto ,  Paolo Semenzato

发明人： Loris Bollea ,  Bruno Melis ,  Roberto Rossi ,  Alfredo Ruscitto ,  Paolo Semenzato

IPC分类号： H04L1/00 ,  H04B7/06

CPC分类号： H04B7/0682 ,  H04B7/0617 ,  H04B7/0619

摘要： A method of transmitting signals from a base station towards user terminals in a cellular communication system. The method includes generating diversity signals, wherein at least one of the diversity signals is subjected to a selectively variable RF phase shift. Specifically, a set of radio link quality indicators is determined at the base station, wherein each radio link quality indicator is representative of the quality of the radio link between the base station and a respective one of the user terminals. The set of radio link quality indicators is used to generate an aggregated radio quality indicator, which in turn is used to selectively vary the variable RF phase shift. For example, the phase shift may be selected, which optimizes the aggregated radio quality indicator.

摘要翻译： 一种在蜂窝通信系统中从基站向用户终端发送信号的方法。 该方法包括产生分集信号，其中至少一个分集信号经受有选择地可变的RF相移。 具体地，在基站处确定一组无线链路质量指示符，其中每个无线电链路质量指示符表示基站与相应的一个用户终端之间的无线电链路的质量。 无线电链路质量指示符集用于生成聚合无线电质量指示符，其反过来用于选择性地改变可变RF相移。 例如，可以选择相移，其优化聚合的无线电质量指示符。

公开(公告)号：US08588710B2

公开(公告)日：2013-11-19

申请号：US12083103

申请日：2005-10-05

申请人： Bruno Melis ,  Alfredo Ruscitto ,  Paolo Semenzato ,  Renata Mele ,  Giuseppe Grassano

发明人： Bruno Melis ,  Alfredo Ruscitto ,  Paolo Semenzato ,  Renata Mele ,  Giuseppe Grassano

IPC分类号： H04B7/02

CPC分类号： H04B7/0671 ,  H04B7/04 ,  H04B7/0837 ,  H04B7/0894

摘要： A system for diversity processing two signals transmitted and/or received via two diversity antennas includes at least four respective propagation paths coupling the signals to the two diversity antennas. Diversity processing is primarily in the form of decorrelation achieved by means of time variable delay elements that apply time variable delays to the signals propagating over at least two of the propagation paths in the system. The related processing may take place either at RF or IF, or at baseband, whereby the time variable delays are applied by subjecting the baseband signals to multiplication by a complex signal.

摘要翻译： 用于分集处理经由两个分集天线发送和/或接收的两个信号的系统包括将信号耦合到两个分集天线的至少四个相应的传播路径。 分集处理主要是通过时间可变延迟元件实现的去相关的形式，其对通过系统中的至少两个传播路径传播的信号应用时间可变延迟。 相关处理可以在RF或IF或基带处进行，由此通过使基带信号乘以复数信号来应用时间可变延迟。