公开(公告)号：US20040223537A1

公开(公告)日：2004-11-11

申请号：US10766968

申请日：2004-01-28

Applicant: NORTEL NETWORKS LIMITED.

Inventor： Moussa Abdi ,  Alexandre Jard ,  Hassan El Nahas El Homsi ,  Jean-Marc Corbel

IPC: H04B001/707

CPC classification number: H04B1/7105 ,  H04B1/71075

Abstract: The signal received comprises contributions from several channels multiplexed by respective spreading codes. After having estimated response parameters of the channels, soft estimates of the symbols transmitted are calculated. These symbols are then apportioned between a first set of symbols satisfying a confidence criterion applied to the calculated soft estimates and a second set of symbols not satisfying this criterion. A modified signal is determined by subtracting estimated contributions corresponding to the symbols of the first set from the signal received. New soft estimates of the symbols of the second set only are calculated, as a function of the modified signal and of the estimated response parameters, and this may be done with a detection algorithm of more complex nature, in particular a multi-user algorithm, by virtue of the size reduction performed by restricting oneself to the symbols of the second set.

Abstract translation: 所接收的信号包括由相应的扩展码复用的多个信道的贡献。 在估计了信道的响应参数之后，计算发送的符号的软估计。 这些符号然后在满足应用于所计算的软估计的置信度标准的第一组符号和不满足该标准的第二组符号之间分摊。 通过从接收到的信号中减去与第一组的符号相对应的估计的贡献来确定修改的信号。 作为修改信号和估计的响应参数的函数，仅计算第二组的符号的新的软估计，并且可以使用更复杂性质的检测算法，特别是多用户算法来完成， 凭借通过限制自己到第二组的符号来执行的尺寸减小。

公开(公告)号：US20040240521A1

公开(公告)日：2004-12-02

申请号：US10807664

申请日：2004-03-24

Applicant: NORTEL NETWORKS LIMITED

Inventor： Alexandre Jard ,  Moussa Abdi ,  Hassan El Nahas El Homsi ,  Jean-Marc Corbel

IPC: H04B001/69

CPC classification number: H04B1/7113 ,  H04B1/7117

Abstract: In a spread spectrum digital radiocommunication receiver, a propagation profile of a propagation channel between sending means and the receiver, including at least one propagation path associated with a reception energy, is determined, data relating to an energy distribution in the propagation profile are measured, and information symbols carried by a signal received originating from sending means over the propagation channel are estimated, by applying to the signal a processing taking into account a predetermined maximum number of propagation paths, the propagation paths taken into account being chosen according to a criterion selected from several criteria as a function of the measured data relating to the energy distribution in the propagation profile.

Abstract translation: 在扩频数字无线电通信接收机中，确定发送装置和接收机之间的传播信道的传播分布，包括与接收能量相关联的至少一个传播路径，测量与传播分布中的能量分布有关的数据， 并且通过在传播信道上由发送装置发送的信号承载的信号携带的信息通过对信号应用考虑到预定的最大传播路径数的一个处理来估计，所考虑的传播路径根据所选择的标准被选择 作为与传播分布中的能量分布有关的测量数据的函数的几个标准。