公开(公告)号：EP1475899B1

公开(公告)日：2006-07-19

申请号：EP03425291.6

申请日：2003-05-07

Applicant: STMicroelectronics S.r.l.

Inventor： Rimi, Francesco ,  Pappalardo, Francesco ,  Avellone, Giuseppe ,  Galluzzo, Agostino

IPC: H04B1/707

CPC classification number: H04B1/70735 ,  H04B1/7083 ,  H04B2201/70702 ,  H04B2201/70707

公开(公告)号：EP1562298A8

公开(公告)日：2005-11-09

申请号：EP04425077.7

申请日：2004-02-06

Applicant: STMicroelectronics S.r.l.

Inventor： Rimi, Francesco ,  Serratore, Alberto ,  Avellone, Giuseppe ,  Pappalardo, Francesco ,  Galluzzo, Agostino

IPC: H04B1/707

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B2201/7071

Abstract: In order to perform, according to a received signal (r), a channel-estimation procedure and a cell-search procedure in cellular communication systems, there are executed at least one first operation of correlation of said received signal (r) with secondary synchronization codes (SSC) and a second operation of correlation of said received signal (r) with known midamble codes ( mid, MPL, MPS), whilst said channel-estimation procedure comprises a third operation of correlation of at least part of said received signal (r) with known midamble codes ( mid, MPL, MPS), said first, second, and third correlation operation being executed by sending at least part ( e midamble ) of said received signal (r) to an input of a correlation bank (111, 151; 203, 253; 303). There are envisaged the operations of:

sending, in a first time interval, the received signal (r) to said correlation bank (303) for executing the first operation of correlation of said received signal (r) with secondary synchronization codes (SSC);
sending, in a second time interval, at least part ( e midamble ) of said received signal (r) to said same correlation bank (303) for executing the second operation of correlation of said received signal (r) with known midamble codes ( mid, MPL, MPS);
sending, in a second time interval, the received signal (r) to said same correlation bank (303) for executing the third operation of correlation of at least part ( e midamble ) of said received signal (r) with known midamble codes ( mid, MPL, MPS).

Preferential application is in mobile communication systems based upon standards such as UMTS, CDMA2000, IS95 or WBCDMA.

公开(公告)号：EP1562298A1

公开(公告)日：2005-08-10

申请号：EP04425077.7

申请日：2004-02-06

Applicant: STMicroelectronics S.r.l.

Inventor： Rimi, Francesco ,  Serratore, Alberto ,  Avellone, Giuseppe ,  Pappalardo, Francesco ,  Galluzzo, Agostino

IPC: H04B1/707

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B2201/7071

Abstract: In order to perform, according to a received signal (r), a channel-estimation procedure and a cell-search procedure in cellular communication systems, there are executed at least one first operation of correlation of said received signal (r) with secondary synchronization codes (SSC) and a second operation of correlation of said received signal (r) with known midamble codes ( mid, MPL, MPS), whilst said channel-estimation procedure comprises a third operation of correlation of at least part of said received signal (r) with known midamble codes ( mid, MPL, MPS), said first, second, and third correlation operation being executed by sending at least part ( e midamble ) of said received signal (r) to an input of a correlation bank (111, 151; 203, 253; 303). There are envisaged the operations of:

sending, in a first time interval, the received signal (r) to said correlation bank (303) for executing the first operation of correlation of said received signal (r) with secondary synchronization codes (SSC);
sending, in a second time interval, at least part ( e midamble ) of said received signal (r) to said same correlation bank (303) for executing the second operation of correlation of said received signal (r) with known midamble codes ( mid, MPL, MPS);
sending, in a second time interval, the received signal (r) to said same correlation bank (303) for executing the third operation of correlation of at least part ( e midamble ) of said received signal (r) with known midamble codes ( mid, MPL, MPS).

Preferential application is in mobile communication systems based upon standards such as UMTS, CDMA2000, IS95 or WBCDMA.

Abstract translation: 为了执行，雅丁到的接收信号（R），一个信道估计过程，并在蜂窝通信系统中小区搜索过程中，被执行的至少一个第一操作。所述的相关性的与辅同步接收到的信号（r）的 码（SSC）和所述的相关性的第二次手术以已知的训练序列码的接收信号（R）（中，MPL，MPS），而所述信道估计过程包括所述的至少一部分接收信号的相关的第三外科手术（ R）与已知的中置码码（中旬，MPL，MPS），所述第一，第二和第三相关手术被发送的至少一部分（emidamble）的所述接收信号（R），以在相关银行的输入（111执行时， 151; 203，253; 303）。 有设想的操作：用于执行所述接收到的信号（r）的与辅助同步码（SSC）的相关性的第一手术发送，在第一时间间隔中，接​​收信号（R），以所述相关银行（303）; 说的发送在第二时间间隔的至少一部分（emidamble）接收的信号（R）连接到所述相同的相关行（303），用于执行相关的第二次手术的表示，与已知的中置码码（中间接收信号（R）， MPL，MPS）; 在第二时间间隔发送，用于执行至少部分的相关性。所述的第三次手术（emidamble）所接收的信号（R）连接到所述相同的相关行（303）与已知的中置码码（中间接收信号（R）， MPL，MPS）。 优先应用是在基于标准的移动通信系统：诸如UMTS，CDMA2000，IS95或WBCDMA码。

公开(公告)号：EP1475899A1

公开(公告)日：2004-11-10

申请号：EP03425291.6

申请日：2003-05-07

Applicant: STMicroelectronics S.r.l.

Inventor： Rimi, Francesco ,  Pappalardo, Francesco ,  Avellone, Giuseppe ,  Galluzzo, Agostino

IPC: H04B1/707

CPC classification number: H04B1/70735 ,  H04B1/7083 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: In order to execute the cell-search procedure in a cellular communication system (such as a system based upon the 3GPP TDD standard), there are available identification codes for the second step (slot synchronization) and for the third step (identification of the scrambling codes). Said identification codes are identified by means of a process of correlation with the received signal and are used for obtaining from a correspondence table the parameters for the execution of the second step (CD) or of the third step (SCR). The correspondence table is stored in a reduced form by means of the identification, according to rules of symmetry and redundancy, of subtables designed to generate the entire table by means of appropriate combination operations.
The search procedure in the correspondence table thus reduced is conveniently modified by means of the introduction of said combination operations.
A preferential application is in mobile communication systems based upon standards, such as UMTS, CDMA2000, IS95 or WBCDMA.

Abstract translation: 为了在蜂窝通信系统（例如基于3GPP TDD标准的系统）中执行小区搜索过程，存在用于第二步骤（时隙同步）的可用识别码，并且对于第三步骤（识别加扰 码）。 所述识别码通过与接收信号相关的过程来识别，并且用于从对应表获得用于执行第二步骤（CD）或第三步骤（SCR）的参数。 通过借助于通过适当的组合操作生成整个表的子表的对称和冗余规则的标识，缩减形式存储对应表。 通过引入所述组合操作，可以方便地修改由此减少的对应表中的搜索过程。 基于诸如UMTS，CDMA2000，IS95或WBCDMA的标准的移动通信系统中的优先应用是优选的。

公开(公告)号：EP1429467A1

公开(公告)日：2004-06-16

申请号：EP03020851.6

申请日：2003-09-15

Applicant: STMicroelectronics S.r.l.

Inventor： Avellone, Giuseppe ,  Rimi, Francesco ,  Pappalardo, Francesco ,  Galluzzo, Agostino ,  Visalli, Giuseppe

IPC: H04B1/707

CPC classification number: H04B1/70735 ,  H04B1/7083

Abstract: Once slot synchronization has been obtained in a first step, during a second step there is acquired, by means of correlation (111, 117) of the received signal (r) with the synchronization codes, the information corresponding to the codegroup and to the fine slot synchronization. The synchronization codes are split into codesets. In a first step, a synchronization code identifying a corresponding codeset (CS) is identified by means of correlation (111) and search for the maximum value of correlation energy (114). In a second step, the received signal (r) is correlated (117) with the remaining codes (113) belonging to the codeset identified. The information thus obtained, which corresponds to all the synchronization codes comprised in the codeset identified, is used (115) for obtaining frame synchronization and codegroup identification. Preferential application is in mobile communication systems based upon standards, such as UMTS, CDMA2000, IS95 or WBCDMA.

Abstract translation: 一旦时隙同步已经在第一步骤中获得，在第二步骤期间出现被获取时，由所接收的信号（R）与所述同步码的相关性（111，117）的装置，所述信息对应于所述代码组和对细 时隙同步。 同步码被分成代码集。 在第一步骤中，一个同步码识别相应的代码组（CS）被识别BY相关（111）的方式，并搜索相关能量（114）的最大值。 在第二步骤中，接收到的信号（r）被相关（117）与属于所标识的代码组的剩余的代码（113）。 这样获得的信息，其对应于所标识的代码集包括的所有同步码，则使用（115），用于获得帧同步和码组识别。 优先应用是在基于标准的，：诸如UMTS，CDMA2000，IS95或WBCDMA码的移动通信系统。

公开(公告)号：EP1173025A1

公开(公告)日：2002-01-16

申请号：EP00202437.0

申请日：2000-07-10

Applicant: STMicroelectronics S.r.l.

Inventor： Bruna, Arcangelo ,  Mancuso, Massimo ,  Galluzzo, Agostino

IPC: H04N7/30

CPC classification number: H04N19/94 ,  H04N19/126 ,  H04N19/14 ,  H04N19/15 ,  H04N19/18 ,  H04N19/182 ,  H04N19/186 ,  H04N19/196 ,  H04N19/60

Abstract: A method (300) of compressing a digital image including a matrix of elements each one consisting of at least one component of different type representing a pixel, the method comprising the steps of splitting (340) the digital image into a plurality of blocks and calculating, for each block, a group of DCT coefficients for the components of each type, and quantizing (350a-355a) the DCT coefficients of each group using a corresponding quantization table scaled by a gain factor for achieving a target compression factor; the method also comprises the steps of further quantizing (350-355) the DCT coefficients of each group using the corresponding quantization table scaled by a pre-set factor, arranging (360) the further quantized DCT coefficients in a zig-zig vector, calculating (365-370) a basic compression factor provided by the quantization table scaled by the pre-set factor as a first function of the zigzag vector, and estimating (375) the gain factor as a second function of the basic compression factor, the second function being determined experimentally according to the target compression factor.

Abstract translation: 一种压缩数字图像的方法（300），包括由表示像素的不同类型的至少一个分量组成的元素矩阵，所述方法包括以下步骤：将数字图像分割（340）成多个块并计算 对于每个块，使用用于每种类型的分量的一组DCT系数，并且使用由用于实现目标压缩因子的增益因子缩放的对应量化表量化（350a-355a）每个组的DCT系数; 该方法还包括以下步骤：使用由预设因子缩放的相应量化表进一步量化（350-355）每个组的DCT系数，将其它量化的DCT系数排列（360）为Zig向量，计算 （365-370）由预置因子缩放的量化表提供的基本压缩因子作为之字形向量的第一函数，并且将增益因子估计为（375）作为基本压缩因子的第二函数，第二 功能根据目标压缩因子实验确定。

公开(公告)号：EP1173026B1

公开(公告)日：2008-07-30

申请号：EP00202438.8

申请日：2000-07-10

Applicant: STMicroelectronics S.r.l.

Inventor： Bruna, Arcangelo ,  Mancuso, Massimo ,  Galluzzo, Agostino

IPC: H04N7/30 ,  H04N5/232 ,  G02B7/36

CPC classification number: H04N5/2351 ,  H04N5/23212 ,  H04N19/122 ,  H04N19/126 ,  H04N19/14 ,  H04N19/149 ,  H04N19/18 ,  H04N19/186 ,  H04N19/42 ,  H04N19/60

公开(公告)号：EP1343265B1

公开(公告)日：2006-05-31

申请号：EP02425130.8

申请日：2002-03-07

Applicant: STMicroelectronics S.r.l.

Inventor： Lo Iacono, Daniele ,  Messina, Ettore ,  Avellone, Giuseppe ,  Galluzzo, Agostino

IPC: H04J13/02

CPC classification number: H04J13/105 ,  H04J13/0025

公开(公告)号：EP1524772A1

公开(公告)日：2005-04-20

申请号：EP03425662.8

申请日：2003-10-13

Applicant: STMicroelectronics S.r.l.

Inventor： Visalli, Giuseppe ,  Pappalardo, Francesco ,  Avellone, Giuseppe ,  Rimi, Francesco ,  Galluzzo, Agostino

IPC: H03M13/25 ,  H04L27/233

CPC classification number: H04L1/0059 ,  H03M13/256 ,  H04L1/0054 ,  H04L1/0068 ,  H04L25/067 ,  H04L27/2272 ,  H04L2027/0055 ,  H04L2027/0067

Abstract: A phase recovery and decoding method for decoding signals (S'(t)) comprising encoded symbols (u k ) over a respective symbol interval (T) which modulate a carrier, for example in a TCM system. The method envisages performing (20 to 26) a phase locking of the signal to be decoded so as to obtain a phase-locked signal which can present, during each symbol interval (T), variations induced by disturbances (noise, fading, etc.). The value attributed to the decoded symbol (U k ) is a function of the value assumed by the phase-locked signal on at least one subinterval of the symbol interval (T), for example located at the end of the symbol interval (T). Alternatively, the value assumed by the phase-locked signal on a plurality of subintervals comprised in each symbol interval (T) is detected (24,32), and a respective majority value of said phase-locked signal within said plurality of subintervals is identified (34,36). A suitable phase recovery and decoding circuit comprises a phase comparator (20), hard decision means (24), an encoder circuit (26), an oscillator (22) and a selection unit (28). For determining decoded value (U k ) and updating the state of the encoder circuit.

Abstract translation: 一种相位恢复和解码方法，用于在例如在TCM系统中调制载波的相应符号间隔（T）上对包括编码符号（uk）的信号（S'（t））进行解码。 该方法设想对待解码的信号执行（20至26）相位锁定，以获得在每个符号间隔（T）期间可能存在由干扰（噪声，衰落等）引起的变化的锁相信号。 ）。 归因于解码符号（Uk）的值是在符号间隔（T）的至少一个子间隔（例如位于符号间隔（T）的结尾）处由锁相信号假设的值的函数。 或者，检测包括在每个符号间隔（T）中的多个子间隔上的锁相信号所假设的值（24,32），并且识别所述多​​个子区间内的所述锁相信号的相应多数值 （34,36）。 合适的相位恢复和解码电路包括相位比较器（20），硬判决装置（24），编码器电路（26），振荡器（22）和选择单元（28）。 用于确定解码值（Uk）并更新编码器电路的状态。

公开(公告)号：EP1443669A1

公开(公告)日：2004-08-04

申请号：EP03425058.9

申请日：2003-01-31

Applicant: STMicroelectronics S.r.l.

Inventor： Rimi, Francesco ,  Avellone, Giuseppe ,  Pappalardo, Francesco ,  Speziali, Filippo ,  Galluzzo, Agostino

IPC: H04B1/707 ,  H04B7/26

CPC classification number: H04B1/70735 ,  H04B1/7083 ,  H04B1/709 ,  H04B2201/70707

Abstract: In a first step, slot synchronization is obtained by setting in correlation (210, 220) the received signal (r) with a primary sequence (SG), which represents the primary channel (PSC), and by storing said received signal. During a second step, the said correlator (210, 220) is re-used for correlating the received signal (r) with a secondary sequence (SSC) corresponding to the secondary synchronization codes. The correlator (210) is preferably structured in the form of a first filter (210) and of a second filter (220) set in series, which receive a first secondary sequence (SG1) and a second secondary sequence (SG2), typically consisting of Golay sequences. Proposed herein are architectures of a parallel and serial type, as well as architectures designed for re-using further circuit parts. A preferential application is in mobile communication systems based upon standards such as UMTS, CDMA2000, IS95, or WBCDMA.

Abstract translation: 在第一步骤中，通过将接收信号（r）与表示主信道（PSC）的主序列（SG）相关联（210,220）并存储所述接收信号来获得时隙同步。 在第二步骤期间，所述相关器（210,220）被重新用于使接收信号（r）与对应于辅同步码的辅助序列（SSC）相关。 相关器（210）优选地被构造成串联设置的第一滤波器（210）和第二滤波器（220）的形式，其接收第一次级序列（SG1）和第二次级序列（SG2），典型地由 Golay序列。 这里提出的是并行和串行类型的体系结构，以及为重新使用更多电路部分而设计的体系结构。 优先应用在基于诸如UMTS，CDMA2000，IS95或WBCDMA的标准的移动通信系统中。