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。

公开(公告)号：US20020052215A1

公开(公告)日：2002-05-02

申请号：US10000612

申请日：2001-10-24

Applicant: STMicroelectronics N.V.

Inventor： Patrick Conti ,  Friedbert Berens

IPC: H04B007/00

CPC classification number: H04W52/52

Abstract: A cellular telephone includes a plurality of power amplifiers having a common operating region. If one of the amplifiers has to be deselected, a desired moment for the switching to another amplifier is defined based upon a predetermined transmission interrupt criterion. The power continues to be adjusted with the currently selected amplifier until the instant of switch over. Switching to the other amplifier may then be performed after the transmission has been interrupted.

Abstract translation: 蜂窝电话包括具有公共操作区域的多个功率放大器。 如果必须取消其中一个放大器，则基于预定的传输中断标准来定义用于切换到另一放大器的所需时刻。 电源继续使用当前选择的放大器进行调整，直到切换为止。 然后可以在传输中断之后切换到另一个放大器。

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：US20020145551A1

公开(公告)日：2002-10-10

申请号：US10113837

申请日：2002-04-01

Applicant: STMicroelectronics N.V.

Inventor： Thierry Arnaud ,  Friedbert Berens

IPC: H03M003/00

CPC classification number: H03M3/392 ,  H03M3/458

Abstract: A remote terminal includes a receiver stage for receiving a transmitted signal and for delivering an analog signal. The remote terminal further includes an analog/digital converter for converting the analog signal to a digital signal, and a processing stage for processing the digital signal. The analog/digital converter is a delta-sigma converter having adjustable parameters, and the processing stage includes a tuning circuit for adjusting these parameters on the fly as a function of the transmission standard, of the actual rate of transmission of the useful data, and of the actual conditions of reception.

Abstract translation: 远程终端包括用于接收发射信号和传送模拟信号的接收机级。 远程终端还包括用于将模拟信号转换为数字信号的模拟/数字转换器，以及用于处理数字信号的处理级。 模拟/数字转换器是具有可调整参数的Δ-Σ转换器，并且处理级包括用于根据传输标准即时调整这些参数的调整电路，用于有用数据的实际传输速率，以及 的实际接待条件。

公开(公告)号：US20020012384A1

公开(公告)日：2002-01-31

申请号：US09907086

申请日：2001-07-17

Applicant: STMicroelectronics N.V.

Inventor： Friedbert Berens

IPC: H04K001/00

CPC classification number: H04B1/7115 ,  H04B1/7117

Abstract: A rake receiver uses a delayed version of the received sequence and a delayed version of a scrambling code. The flexible hardware structure of the time-aligning and descrambling unit includes at least two delay chains and one multiplier. By controlling two multiplexers, the delayed versions of the received sequence can be multiplied with an arbitrary scrambling code having an arbitrary phase. During one chip period, one multiplication is performed for each path to be processed.

Abstract translation: 瑞克接收机使用接收到的序列的延迟版本和扰码的延迟版本。 时间对准和解扰单元的灵活的硬件结构包括至少两个延迟链和一个乘法器。 通过控制两个多路复用器，接收序列的延迟版本可以与具有任意相位的任意扰码相乘。 在一个码片周期期间，对每个待处理的路径执行一次乘法。

公开(公告)号：US20020010010A1

公开(公告)日：2002-01-24

申请号：US09886966

申请日：2001-06-21

Applicant: STMicroelectronics N.V.

Inventor： Thierry Arnaud ,  Friedbert Berens

IPC: H04M001/00

CPC classification number: H04W52/029 ,  H03J7/065 ,  Y02D70/1242

Abstract: The electrical consumption of a cellular mobile telephone is reduced by using fractional-division phase-locked loops receiving a frequency reference from a fairly inaccurate quartz oscillator. Electrical consumption is also reduced by switching the output of the oscillator onto the input of the processing stage when the transmission/reception stage is inactive. The fractional-division phase-locked loops can then be deactivated.

Abstract translation: 通过使用从相当不准确的石英振荡器接收频率参考的分数分频锁相环来减少蜂窝移动电话的电力消耗。 当发送/接收阶段不活动时，通过将振荡器的输出切换到处理级的输入端也可以减少电力消耗。 然后可以停用分数分频锁相环。