公开(公告)号：EP2096816A2

公开(公告)日：2009-09-02

申请号：EP09153926.2

申请日：2009-02-27

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo ,  Valle, Stefano

IPC: H04L27/20

CPC classification number: H04L27/2032

Abstract: A calibration method and system for reducing modulation errors in a telecommunication transmitter apparatus includes providing a pair of test signals, which are substantially in quadrature to each other, and to repeat an estimation loop. The estimation loop starts with generating a modulated signal by modulating the test signals (the modulation introducing a modulation error) and continues by obtaining a squared signal corresponding to the square of the modulated signal. A transformed signal corresponding to the squared signal in the frequency domain is then calculated. The estimation loop further includes calculating an error indicator, indicative of the modulation error, according to the modulus of the transformed signal. A compensation, to be applied to the test signals for counterbalancing the modulation error, is calculated according to the error indicator and is then applied to the test signals. The estimation loop is repeated until the error indicator reaches a threshold and an indication of the compensation resulting from a last iteration of the estimation loop is stored (for the application of the compensation to each pair of operative signals managed by the telecommunication transmitter apparatus during operation thereof).

Abstract translation: 一种用于减少电信发射机装置中的调制误差的校准方法和系统包括提供一对基本上彼此正交的测试信号，并重复估计环路。 估计循环首先通过调制测试信号（调制引入调制误差）产生调制信号，并通过获得对应于调制信号的平方的平方信号来继续。 然后计算对应于频域中的平方信号的变换信号。 估计环路还包括根据变换信号的模数来计算指示调制误差的误差指示符。 根据误差指标计算出适用于平衡调制误差的测试信号的补偿，然后将其应用于测试信号。 重复估计循环，直到误差指示器达到阈值，并且存储由估计回路的最后一次迭代产生的补偿的指示（对于在操作期间由电信发射机设备管理的每对操作信号对应用补偿） 物）。

公开(公告)号：EP1675335A1

公开(公告)日：2006-06-28

申请号：EP04425933.1

申请日：2004-12-21

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo ,  Silva, Filippo ,  Valle, Stefano

IPC: H04L25/02

CPC classification number: H04L25/0216 ,  H04L25/0212 ,  H04L27/2601

Abstract: In order to execute, as a function of a received signal (r), a procedure of channel estimation in a transmission channel with memory in a telecommunications system, there is envisaged an operation of estimation of a delay spread associated to said channel, said operation of estimation comprising calculation of a root mean square value (τ rms ) of delay spread by means of a step of evaluation of crossings with a threshold level of a quantity associated to a transfer function of said channel. Said step of evaluation of crossings comprises evaluating a mean number of crossings (λ 0 ) of the real and imaginary parts of said channel transfer function with a threshold level corresponding to the zero level. Preferential application is to OFDM telecommunications systems and in particular wireless systems according to the IEEE 802.11a WLAN standard or the HyperlanII WLAN standard.

Abstract translation: 为了执行，作为接收信号（R），与在电信系统存储器的传输信道的信道估计的过程的功能，有设想到关联于所述信道的延迟扩展的估计的手术，所述操作 根的估计计算的，包括均方根延迟的由交叉的评价与关联到所述信道的传递函数的量的阈值电平的步骤而扩散（均方根）。 交叉的评价的，所述步骤包括评估交叉的平均数目（“0）的所述信道传递函数的与阈值电平的实部和虚部对应于零电平。 优先应用是OFDM电信系统和在特定的无线系统雅丁到的IEEE 802.11a WLAN标准或HyperlanII无线标准。

公开(公告)号：EP1257064B1

公开(公告)日：2008-11-19

申请号：EP01111406.3

申请日：2001-05-10

Applicant: STMicroelectronics S.r.l.

Inventor： Ferrari, Marco, c/o CNR-CSTS, Dip. Elettronica ,  Siti, Massimiliano ,  Valle, Stefano ,  Osnato, Fabio ,  Scalise, Fabio

IPC: H03M13/27 ,  H03M13/00 ,  H03M13/29

CPC classification number: H03M13/2957 ,  H03M13/2746 ,  H03M13/2771 ,  H03M13/2789

公开(公告)号：EP1347608B1

公开(公告)日：2008-09-10

申请号：EP02425177.9

申请日：2002-03-21

Applicant: Telecom Italia S.p.A. ,  STMicroelectronics S.r.l.

Inventor： Ettorre, Donato, Telecom Italia S.p.A. ,  Graziano, Maurizio, Telecom Italia S.p.A. ,  Melis, Bruno, Telecom Italia S.p.A. ,  Finotello, Andrea, Telecom Italia S.p.A. ,  Ruscitto, Alfredo, Telecom Italia S.p.A. ,  Valle, Stefano ,  Simoni, Lorena

IPC: H04L25/02

CPC classification number: H04L25/0232

公开(公告)号：EP1513270A1

公开(公告)日：2005-03-09

申请号：EP03425574.5

申请日：2003-09-05

Applicant: STMicroelectronics S.r.l.

Inventor： Valle, Stefano

IPC: H04B7/01

CPC classification number: H04B7/01 ,  H04B17/336

Abstract: The Doppler spread associated to a transmission channel with a gain represented by a random process, is estimated by transmitting on the channel a digital signal (DPCCH I,Q ), which comprises at least one pilot signal, which in turn comprises fields of known symbols, and estimating (22), on the basis of the pilot signal (DPCCH I,Q ), the channel so as to generate a signal indicating the aforesaid gain. There is then detected (22) the zero-crossing rate (η) of the aforesaid signal during a given time interval, and there is also estimated (28) the signal-to-noise ratio (SNR) associated to the channel. The bandwidth (f̂ D ) of the aforesaid random process is estimated (26) according to a reference quantity (I (2) D ), which comprises:

a first term (η̂ 2 π 2 ), representing an estimate (η̂) of said zero-crossing rate (η); and
a second term ( I N (2) - η ˆ 2 π 2 I N (0) 2SNR ), which includes said signal-to-noise ratio of the channel.

Abstract translation: 通过在信道上发送包括至少一个导频信号的数字信号（DPCCHI，Q）来估计与具有由随机过程表示的增益的传输信道相关联的多普勒扩展，该信号又包括已知符号的字段， 以及基于所述导频信号（DPCCHI，Q）来估计（22）所述信道，以产生指示所述增益的信号。 然后在给定时间间隔内检测（22）上述信号的过零率（eta），并且还估计（28）与信道相关联的信噪比（SNR）。 根据参考量（I（2）_D）估计（26）根据上述随机过程的带宽（f / D），其包括：第一项（eta / 2）表示所述过零率（eta）的估计值（eta / ）。 和第二项（I <（2）> N-eta2π2（N）D N DIVIDED 2SNR），其中包括所述信噪比 渠道。

公开(公告)号：EP1675335B1

公开(公告)日：2007-11-21

申请号：EP04425933.1

申请日：2004-12-21

Applicant: STMicroelectronics S.r.l.

Inventor： Poloni, Angelo ,  Silva, Filippo ,  Valle, Stefano

IPC: H04L25/02

CPC classification number: H04L25/0216 ,  H04L25/0212 ,  H04L27/2601

公开(公告)号：EP1347608A1

公开(公告)日：2003-09-24

申请号：EP02425177.9

申请日：2002-03-21

Applicant: TELECOM ITALIA S.p.A. ,  STMicroelectronics S.r.l.

Inventor： Etorre, Donato, Telekom Italia S.p.A. ,  Graziano, Maurizio, Telekom Italia S.p.A. ,  Melis, Bruno, Telekom Italia S.p.A. ,  Finotello, Andrea, Telekom Italia S.p.A. ,  Ruscitto, Alfredo, Telekom Italia S.p.A. ,  Valle, Stefano ,  Simoni, Lorena

IPC: H04L25/02

CPC classification number: H04L25/0232

Abstract: A method for the estimation of the transfer function of a transmission channel in a receiving system of UMTS type envisages the computation of a plurality of channel coefficients, included among known channel coefficients corresponding to pilot symbols, through the reiteration of an interpolation algorithm, capable of calculating an intermediate point (Z, f(Z)) between a first extreme and a second extreme of a determined interval, the first extreme being formed by at least two known points and the second extreme being formed by at least one known point, the intermediate point to be calculated having as abscissa (Z) the abscissa value of the mean point between the points defining the interval rounded off to the integer closest to the first extreme, and having as ordinate (f(Z)) the arithmetic average between the ordinate of the known point of the second extreme and the ordinate of a point, chosen between the two known points of the first extreme, having a distance from the intermediate point equal to the distance between the intermediate point and the known point of the second extreme.

Abstract translation: 用于估计UMTS类型的接收系统中的传输信道的传递函数的方法设想通过重复插值算法来计算包括在对应于导频符号的已知信道系数中的多个信道系数，能够 计算确定间隔的第一极限和第二极限之间的中间点（Z，f（Z）），所述第一极限由至少两个已知点形成，所述第二极值由至少一个已知点形成， 要计算的中间点具有横坐标（Z），在限定四舍五入到最接近第一极值的整数之间的点之间的平均点的横坐标值，并且具有纵坐标（f（Z））之间的算术平均值 在第二极端的已知点的纵坐标和在第一极端的两个已知点之间选择的点的纵坐标距离中间件 点等于中间点与第二极限的已知点之间的距离。

公开(公告)号：EP1257064A1

公开(公告)日：2002-11-13

申请号：EP01111406.3

申请日：2001-05-10

Applicant: STMicroelectronics S.r.l.

Inventor： Ferrari, Marco, c/o CNR-CSTS, Dip. Elettronica ,  Siti, Massimiliano ,  Valle, Stefano ,  Osnato, Fabio ,  Scalise, Fabio

IPC: H03M13/27 ,  H03M13/00 ,  H03M13/29

CPC classification number: H03M13/2957 ,  H03M13/2746 ,  H03M13/2771 ,  H03M13/2789

Abstract: A method is described for designing a new prunable S-random interleaver (I) class to be used as a constituent part of turbo codes (C1, C2). 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 (C1, C2) 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.

Abstract translation: 描述了一种用于设计要用作turbo码（C1，C2）的组成部分的新的可修剪的S随机交织器（I）类的方法。 对于先前提出的解决方案，该方法的优点在于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（C1，C2）中找到应用，这得益于需要单规则存储（即，一个ROM存储而不是几个ROM）​​的优点， 所有其他的都是通过修剪获得的，而不会影响整体错误率性能。