公开(公告)号：US09325488B2

公开(公告)日：2016-04-26

申请号：US14817996

申请日：2015-08-04

Applicant: STMicroelectronics N.V.

Inventor： Steven R. Norsworthy ,  Jason Rupert Redgrave

IPC: H04L7/00 ,  H03H17/06 ,  H04L7/02

CPC classification number: H04L7/0008 ,  H03H17/0614 ,  H03H17/0628 ,  H03H2218/04 ,  H04L7/0025 ,  H04L7/005 ,  H04L7/02

Abstract: An interpolator or decimator includes an elastic storage element in the signal path between first and second clock domains. The elastic element may, for example, be a FIFO which advantageously allows short term variation in sample clocks to be absorbed. A feedback mechanism controls a delta-sigma modulated modulo-N counter based sample clock generator. The elastic element combined with a delta-sigma modulator and counter creates a noise-shaped frequency lock loop without additional components, resulting in a much simplified interpolator and decimator.

Abstract translation: 内插器或抽取器包括在第一和第二时钟域之间的信号路径中的弹性存储元件。 弹性元件可以例如是有利地允许采样时钟的短期变化被吸收的FIFO。 反馈机制控制基于Δ-Σ调制的模N计数器的采样时钟发生器。 与Δ-Σ调制器和计数器结合的弹性元件产生噪声形式的频率锁定环，而没有额外的组件，导致了非常简化的内插器和抽取器。

公开(公告)号：US20140078471A1

公开(公告)日：2014-03-20

申请号：US14026310

申请日：2013-09-13

Applicant: STMicroelectronics N.V.

Inventor： Laurent CUISENIER ,  Frederique ROFFET

IPC: G02B27/22 ,  G03B21/14

CPC classification number: G02B27/22 ,  G02B27/646 ,  G03B21/14 ,  H04N9/3173 ,  H04N9/3185 ,  H04N9/3194

Abstract: It is proposed a method for the projection of a sequence of images onto a projection surface by a handheld device having an embedded projector, said method comprising, for an input image to be projected of said sequence of images: a step of evaluation wherein a spatial position variation is evaluated with respect to a reference spatial position of said handheld device; and said spatial position variation is defined by a spatial orientation variation and a spatial vector variation; said spatial vector variation being determined by 3 independent coordinates; and at least one of said 3 independent coordinates is provided by a stereoscopic sensor; a step of compensation wherein a compensated image is generated from said input image to be projected depending on said spatial position variation; and a step of projecting onto said projection surface said compensated image.

Abstract translation: 提出了一种用于通过具有嵌入式投影仪的手持式设备将一系列图像投影到投影表面上的方法，所述方法包括：用于投影所述图像序列的输入图像：评估步骤，其中空间 相对于所述手持装置的参考空间位置评估位置变化; 并且所述空间位置变化由空间取向变化和空间矢量变化来定义; 所述空间矢量变化由3个独立坐标确定; 并且所述3个独立坐标中的至少一个由立体传感器提供; 补偿步骤，其中根据所述空间位置变化从所述要投影的所述输入图像生成补偿图像; 以及将所述补偿图像投影到所述投影面上的步骤。

公开(公告)号：US20040254969A1

公开(公告)日：2004-12-16

申请号：US10745948

申请日：2003-12-24

Applicant: STMicroelectronics N.V.

Inventor： Fabio Pisoni

IPC: G06F015/00

CPC classification number: H04L27/2662 ,  H04L27/2657

Abstract: A clock offset compensation arrangement may include a fractional interpolator for applying a trigonometric interpolation to a sampled input signal according to a clock offset signal. It uses transform-based processing in the frequency domain. Compared to a polynomial type interpolation it may be easier to implement, and may achieve a closer approximation to an ideal interpolation. It may reduce the effects of non-linear type errors introduced by truncation of higher powers. The arrangement may be applied to receivers or transmitters of multi-carrier modems, as well as other applications which use rate adaptation or synchronization.

Abstract translation: 时钟偏移补偿装置可以包括用于根据时钟偏移信号对采样的输入信号应用三角插值的分数内插器。 它在频域中使用基于变换的处理。 与多项式类型插值相比，它可能更容易实现，并且可以实现更接近于理想插值的近似。 它可以减少由截断较高功率引入的非线性类型误差的影响。 该布置可以应用于多载波调制解调器的接收机或发射机，以及使用速率适配或同步的其他应用。

公开(公告)号：US20040213325A1

公开(公告)日：2004-10-28

申请号：US10794768

申请日：2004-03-05

Applicant: STMicroelectronics N.V.

Inventor： Lydi Smaini ,  Didier Helal

IPC: H04B001/69

CPC classification number: H04B1/7174 ,  H04L25/4902

Abstract: Successive groups of N bits are delivered at a delivery frequency Fe greater than a predetermined frequency PRF. At least one of the successive groups includes at least one subgroup of at least one bit defining at least one digital cue of position and of shape of at least one base pulse within a window of length 1/PRF. This digital cue is converted into the base pulse, and the base pulse is filtered using a high-pass filter for providing a pulse of the ultra wideband type within the window with a temporal accuracy equal to 1/N*Fe.

Abstract translation: N个比特的连续组以大于预定频率PRF的传送频率Fe传送。 连续组中的至少一个包括至少一个位的至少一个子群，其限定长度为1 / PRF的窗口内的至少一个基本脉冲的位置和形状的至少一个数字提示。 该数字提示被转换成基本脉冲，并且使用高通滤波器对基本脉冲进行滤波，以便以等于1 / N * Fe的时间精度在窗口内提供超宽带类型的脉冲。

公开(公告)号：US20040151259A1

公开(公告)日：2004-08-05

申请号：US10693674

申请日：2003-10-24

Applicant: STMICROELECTRONICS N.V.

Inventor： Friedbert Berens ,  Ettore Messina ,  Miguel Kirsch

IPC: H04L027/06

CPC classification number: H03M13/3911 ,  H03M13/2957 ,  H03M13/612 ,  H04L1/005 ,  H04L1/0055 ,  H04L1/0066

Abstract: A method is provided for decoding a turbo-code encoded signal in a receiver. According to the method, the signal is received from a transmission channel, and the signal is digitally turbo-code decoded. Additionally, a quality information representative of conditions of the channel state estimation is dynamically determined, and the quality information is dynamically compared with a predetermined criteria for defining good or bad estimation conditions. A Maximum-A-Posteriori algorithm in the logarithmic domain is dynamically selected for good estimation conditions, or an approximation of the Maximum-A-Posteriori algorithm in the logarithmic domain is dynamically selected for bad estimation conditions. Also provided is a receiver that implements such a decoding method.

Abstract translation: 提供了一种用于对接收机中的turbo码编码信号进行解码的方法。 根据该方法，从传输信道接收信号，并且信号被数字turbo码解码。 此外，动态地确定代表信道状态估计的条件的质量信息，并且将质量信息与用于定义好的或不良的估计条件的预定标准动态地比较。 动态地选择对数域中的最大后验算法，以获得良好的估计条件，或者对于不良估计条件动态地选择对数域中的最大后验算法的近似值。 还提供了一种实现这种解码方法的接收机。

公开(公告)号：US20030189972A1

公开(公告)日：2003-10-09

申请号：US10116760

申请日：2002-04-03

Applicant: STMICROELECTRONICS N.V.

Inventor： Friedbert Berens ,  Timo Roman

IPC: H04B001/69

CPC classification number: H04B1/7105 ,  H04B1/7107

Abstract: The method of interference cancellation in a CDMA wireless communication system comprises receiving an incident digital signal containing a user signal transmitted on a CDMA user physical channel and an interfering signal, projecting said incident digital signal onto a projection space orthogonal to the space containing said interfering signal, filtering said projected signal with a filter matched to the CDMA user physical channel for detecting the data contained in said user signal.

Abstract translation: 在CDMA无线通信系统中的干扰消除方法包括：接收包含在CDMA用户物理信道上发送的用户信号和干扰信号的入站数字信号，将所述入站数字信号投影到与包含干扰信号的空间正交的投影空间上 用与CDMA用户物理信道匹配的滤波器对所述投影信号进行滤波，以检测包含在所述用户信号中的数据。

公开(公告)号：US20020126775A1

公开(公告)日：2002-09-12

申请号：US10006995

申请日：2001-12-03

Applicant: STMicroelectronics N.V.

Inventor： David Chappaz

IPC: H04L027/06

CPC classification number: H04L25/03197 ,  H04L25/03191

Abstract: The successive values of the digital symbols which can each take M different possible values are estimated on the basis of the successive values of digital samples each of which results from the combination of at most L successive symbols. This estimation includes a stage by stage progression through a trellis of the Viterbi type with Mk states, with k being less than or equal to Lnull1. All the states of all the stages are respectively provided with aggregate metrics. When taking into account the sample of rank n, all the transitions arriving at the various states of the current stage of the trellis are partitioned into M groups, each group containing all the transitions arising from the states of the preceding stage which are associated with one of the M possible values of the symbol of rank nnullk. The various aggregate metrics are calculated for these various states of the current stage of the trellis. One of the transitions which leads to the state provided with a extremum aggregate metric is determined in each group. A unique decision is taken regarding the value of the symbol of rank nnullk by detecting the group associated with the extremum of these M extremum aggregate metrics. This unique decision is provided with a symbol-confidence index formulated from these M extremum aggregate metrics.

Abstract translation: 可以基于每个由至多L个连续符号的组合产生的数字样本的连续值来估计每个可以取得M个不同可能值的数字符号的连续值。 该估计包括通过具有Mk状态的维特比类型的网格逐级进行，k小于或等于L-1。 所有阶段的所有状态分别被提供聚合指标。 当考虑秩n的样本时，到达网格当前阶段的各种状态的所有转变被划分为M组，每个组包含由前一级的状态产生的与一个状态相关联的所有转换 的n个符号的M个可能值。 对于网格的当前阶段的这些各种状态计算各种聚合度量。 在每组中确定导致提供极值聚合度量的状态的一个转换。 通过检测与这些M极值聚合度量的极值相关联的组，对秩n-k的符号的值进行独特的决定。 这个独特的决策提供了从这些M极值聚合指标制定的符号信心指数。

公开(公告)号：US20020115412A1

公开(公告)日：2002-08-22

申请号：US09993913

申请日：2001-11-06

Applicant: STMicroelectronics N.V.

Inventor： Corinne Bonhomme

IPC: H04B007/00

CPC classification number: H04L25/0216

Abstract: A method for estimating the impulse response of an information transmission channel includes evaluating a useful number of coefficients of an impulse response of the information transmission channel as a function of actual characteristics of the information transmission channel. This evaluation is carried out, for example, by using a time domain spreading parameter of the channel.

Abstract translation: 用于估计信息传输通道的脉冲响应的方法包括：根据信息传输通道的实际特性来评估信息传输通道的脉冲响应的有用数量。 该评估例如通过使用信道的时域扩展参数进行。

公开(公告)号：US20040218581A1

公开(公告)日：2004-11-04

申请号：US10792032

申请日：2004-03-03

Applicant: STMicroelectronics N.V.

Inventor： Chiara Cattaneo

IPC: H04J003/06

CPC classification number: H04B1/7183 ,  H04L25/0226

Abstract: A method for processing an incident pulsed signal of an ultra wide band type received over a channel by a data device operating in a wireless data communications system is provided. The incident pulsed signal carries information within a super-frame structure. Upon reception of each super-frame structure by a data device, coarse synchronization is performed with another data device acting as a coordinator device for the wireless data communications system. The coarse synchronization uses a first training sequence. Upon reception of each frame allocated to the data device operating within the super-frame structure, channel estimation is performed using a second training sequence. The channel estimation also performs a frame synchronization.

Abstract translation: 提供了一种用于处理由在无线数据通信系统中操作的数据装置在信道上接收的超宽带类型的入射脉冲信号的方法。 入射脉冲信号在超帧结构内承载信息。 在通过数据设备接收每个超帧结构时，与用作无线数据通信系统的协调器装置的另一数据装置执行粗略同步。 粗同步使用第一训练序列。 在接收到分配给在超帧结构内操作的数据设备的每帧时，使用第二训练序列来执行信道估计。 信道估计还执行帧同步。

公开(公告)号：US20040058658A1

公开(公告)日：2004-03-25

申请号：US10621030

申请日：2003-07-16

Applicant: STMicroelectronics N.V.

Inventor： Miguel Kirsch ,  Friedbert Berens

IPC: H04B001/18

CPC classification number: H03J7/02 ,  H04J13/0044

Abstract: A method for controlling frequency of a local oscillator in a DS-CDMA type receiver includes transforming a known spread spectrum signal into a sampled digital signal formed of symbols with a despreaded frequency spectrum, and determining a residual frequency error fe for each symbol including a first residual frequency error fe1. The method further includes correcting the frequency of the local oscillator with the residual frequency errors, and determining an average of absolute values of a predetermined number of successive residual frequency errors. The average is compared with a threshold, and if the average is greater than or equal to the threshold, the local oscillator frequency is corrected using an error equal to nullsgn(fe1) (1/Tnullnullfe1null), where sgn is the sign function, null null is the absolute value function and T is duration of a symbol before determining the next residual frequency error associated with the next symbol.

Abstract translation: 一种用于控制DS-CDMA型接收机中的本地振荡器的频率的方法，包括将已知的扩频信号变换成由具有解扩频谱的符号形成的采样数字信号，以及确定每个符号的残差频率误差fe， 残余频率误差fe1。 该方法还包括用残余频率误差校正本地振荡器的频率，以及确定预定数量的连续残差频率误差的绝对值的平均值。 将平均值与阈值进行比较，如果平均值大于或等于阈值，则使用等于-sgn（fe1）（1 / T- | fe1 |）的误差校正本振振荡器频率，其中sgn为 符号函数，| | 是绝对值函数，T是在确定与下一符号相关联的下一个残余频率误差之前的符号的持续时间。