公开(公告)号：EP2317712A1

公开(公告)日：2011-05-04

申请号：EP10188991.3

申请日：2010-10-27

Applicant: STMicroelectronics S.r.l.

Inventor： Siti, Massimiliano ,  Assalini, Antonio ,  Pupolin, Silvano

IPC: H04L25/02 ,  H04L27/26

CPC classification number: H04L27/2649 ,  H04B7/0456 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/024

Abstract: The time-variant channel estimation in an OFDM transmission system envisages the operations of:
a) determining the received signal vector Y j,k for one or more of R receiving antennas, j = 1,..., R, and at the current time instant k together with the frequency-domain channel-estimate vector Ĥ j,k -1 at a preceding time instant k-1 and for each antenna j of one or more of R receiving antennas;
b) producing a first estimate  k of the transmitted digital symbols at the current time instant k on the basis of the aforesaid frequency-domain channel-estimate vectors Ĥ j,k -1 at the preceding time instant k-1;
c) computing an updated version of the frequency-domain channel-estimate vectors Ĥ j,k at the current time instant k and for each antenna j of one or more of R receiving antennas on the basis of the received signal vectors Y j,k at the current time instant k and for each antenna j of one or more of R receiving antennas, using the aforesaid estimate  k of the transmitted digital symbols at the current time instant k as set of known transmitted digital symbols;
d) using the aforesaid updated version of the frequency-domain channel-estimate vectors Ĥ j,k at the current time instant k and for each antenna j of one or more of R receiving antennas, for equalizing (414) the paths of the transmission channel (20, 22) and decoding the received signal vectors Y j,k at the current time instant k and for each antenna j of one or more of R receiving antennas; and
e) storing (412) the updated versions of the channel-estimate vectors for using them in steps a) and b) at the next time instant k+1.

Abstract translation: OFDM传输系统中的时变信道估计设想了以下操作：a）确定R个接收天线中的一个或多个接收信号矢量Y j，k，j = 1，...，R，并且在当前 时刻k与前一时刻k-1处的频域信道估计向量H j，k -1和R个接收天线中的一个或多个的每个天线j一起; b）基于前一时刻k-1处的上述频域信道估计向量H j，k -1产生当前时刻k发送的数字符号的第一估计A k; c）基于接收信号矢量Y j，k计算当前时刻k的频域信道估计向量H j，k的一个或多个的接收天线的每个天线j的更新版本 在当前时刻k和对于R个接收天线中的一个或多个的每个天线j，使用在当前时刻k的所发射的数字符号的上述估计A k作为已知发射数字符号的集合; d）使用上述更新版本的当前时刻k的频域信道估计向量H j，k和R个接收天线中的一个或多个的每个天线j，以均衡（414）传输路径 信道（20,22），并且对当前时刻k的接收信号矢量Y j，k以及R个接收天线中的一个或多个的每个天线j进行解码; 以及e）在下一个时刻k + 1的步骤a）和b）中存储（412）用于使用它们的信道估计向量的更新版本。