公开(公告)号：EP1705806A1

公开(公告)日：2006-09-27

申请号：EP05388024.1

申请日：2005-03-21

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)

发明人： Nilsson, Johan ,  Bernhardsson, Bo ,  Lindoff, Bengt

IPC分类号： H04B1/707

CPC分类号： H04J13/0048 ,  H04B1/7075 ,  H04B1/7077 ,  H04B2201/70701 ,  H04J13/18

摘要： Disclosed is a method of generating a detection signal for detecting energy in a spread-spectrum signal, comprising: de-spreading the spread-spectrum signal by applying a predetermined spreading code to obtain a sequence of de-spread signal symbols (202A-202D), accumulating a number of said signal symbols to obtain a single detection signal. The accumulation includes: obtaining a first and a second subset of said de-spread signal symbols, wherein the symbols of the first subset have values that are known to the receiver or at least known to be the same for all symbols of the first subset, and wherein the symbols of the second subset have unknown values; coherently accumulating the symbols of the first subset to obtain a first partial detection signal (203A,203B,203C), non-coherently accumulating the symbols of the second subset to obtain a second partial detection signal (204A,204B,204C); and combining the first and second partial detection signals to obtain the single detection signal (208).

摘要翻译： 公开了一种产生用于检测扩频信号中的能量的检测信号的方法，该方法包括：通过应用预定的扩频码对扩频信号进行解扩以获得解扩信号符号序列（202A-202D） 累积多个所述信号符号以获得单个检测信号。 所述累积包括：获得所述解扩信号符号的第一和第二子集，其中所述第一子集的所述符号具有所述接收器已知的值或至少已知所述第一子集的所有符号相同的值， 并且其中第二子集的符号具有未知值; 对第一子集的符号进行相干累加以获得第一部分检测信号（203A，203B，203C），非相干累加第二子集的符号以获得第二部分检测信号（204A，204B，204C）; 并组合第一和第二部分检测信号以获得单个检测信号（208）。

公开(公告)号：EP1480350A1

公开(公告)日：2004-11-24

申请号：EP03388067.5

申请日：2003-10-13

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Jonsson, Elias ,  Nilsson, Johan ,  Lindoff, bengt

IPC分类号： H04B1/707 ,  H04L25/02

CPC分类号： H04L25/0228 ,  H04B1/712

摘要： A method of determining a channel estimate of a first transmission channel in a communications system. The method comprises deriving a first set of channel estimates from symbols received through said first transmission channel; deriving a second set of channel estimates from symbols received through a second transmission channel in the communications system; determining a scale factor between the first and second sets of channel estimates from a least squares error criterion; and determining the channel estimate of the first transmission channel as a channel estimate of the second transmission channel scaled by the determined scale factor.