公开(公告)号：US20040196929A1

公开(公告)日：2004-10-07

申请号：US10780180

申请日：2004-02-17

Applicant: France Telecom

Inventor： Stefan Wendt ,  Ahmed Saadani ,  Pierre Gelpi ,  Daniel Duponteil

IPC: H04L027/06

CPC classification number: H04B17/3912 ,  H04B1/7115

Abstract: A method of representing the effects on a received signal of a radio communications channel having L paths with a reduced computational effort is achieved by transforming a representation of the channel into a simplified representation. Each path of the radio communications channel has an average attenuation and a pre-determined respective delay. The received signal includes a combination of correlated components determined from an effect of pulse shaping filters on the received signal, each component being correlated with respect to each of the other components represented by a plurality of correlation coefficients. The method comprises generating a plurality of complex zero mean gaussian random variables each having a pre-determined variance, and summing the variables, to form a representation of the signal received via the radio communications channel. The pre-determined variance of each variable is calculated from the eigen values of a matrix formed from the correlation coefficients and a channel correlation matrix which includes the average attenuation of each of the L paths. Accordingly a transformation of the L-path channel into a simplified representation is effected, without a requirement to represent the correlated components of the received signal. The correlated components may be, for example, the signal components produced by each of a plurality of correlators of a rake receiver.

Abstract translation: 通过将信道的表示变换为简化表示来实现表示对具有减少的计算量的L个路径的无线电通信信道的接收信号的影响的方法。 无线电通信信道的每个路径具有平均衰减和预定的相应延迟。 接收到的信号包括从对接收信号的脉冲整形滤波器的影响确定的相关分量的组合，每个分量相对于由多个相关系数表示的每个其它分量相关。 该方法包括产生多个具有预定方差的复零度均值高斯随机变量，并对变量求和，以形成通过无线电通信信道接收的信号的表示。 根据由相​​关系数形成的矩阵的特征值和包括每个L个路径的平均衰减的信道相关矩阵来计算每个变量的预定方差。 因此，实现了将L路径信道变换为简化表示，而不需要表示接收信号的相关分量。 相关分量可以是例如由耙式接收机的多个相关器中的每一个产生的信号分量。