公开(公告)号：US09350585B2

公开(公告)日：2016-05-24

申请号：US14714937

申请日：2015-05-18

Applicant: STMicroelectronics S.r.l.

Inventor： Massimiliano Siti ,  Antonio Assalini ,  Silvano Pupolin

IPC: H04B7/02 ,  H04L1/02 ,  H04L27/26 ,  H04L25/02 ,  H04B7/04

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

Abstract: An embodiment of the time-variant channel estimation in an OFDM transmission system envisages the operations of: a) determining the received signal vector Yj,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 Ĥj,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 Âk of the transmitted digital symbols at the current time instant k on the basis of the aforesaid frequency-domain channel-estimate vectors Ĥj,k-1 at the preceding time instant k−1; c) computing an updated version of the frequency-domain channel-estimate vectors Ĥj,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 Yj,k at the current time instant k and for each antenna j of one or more of R receiving antennas, using the aforesaid estimate Âk 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 Ĥj,k at the current time instant k and for each antenna j of one or more of R receiving antennas, for equalizing the paths of the transmission channel and decoding the received signal vectors Yj,k at the current time instant k and for each antenna j of one or more of R receiving antennas; and e) storing 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的实施例设想以下操作：a）确定R个接收天线中的一个或多个的接收信号矢量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Ĥj，k-1和一个或多个R个接收天线的每个天线j一起; b）根据前一时刻k-1的上述频域信道估计向量Ĥj，k-1，在当前时刻k产生所发送的数字符号的第一估计值k; c）基于当前时刻k处的接收信号矢量Yj，k计算当前时刻k的频域信道估计向量Ĥj，k和R个接收天线中的一个或多个的每个天线j的更新版本， 使用在当前时刻k的所发送的数字符号的上述估计k作为已知发送的数字符号的集合，使用当前时刻k和一个或多个R个接收天线的每个天线j; d）使用上述更新版本的当前时刻k的频域信道估计向量Ĥj，k和R个接收天线中的一个或多个的每个天线j，以均衡发送信道的路径并对 在当前时刻k处的接收信号矢量Yj，k和R个接收天线中的一个或多个的每个天线j; 以及e）在下一时刻k + 1的步骤a）和b）中存储用于使用它们的信道估计向量的更新版本。

公开(公告)号：US20150256378A1

公开(公告)日：2015-09-10

申请号：US14714937

申请日：2015-05-18

Applicant: STMicroelectronics S.r.l.

Inventor： Massimiliano Siti ,  Antonio Assalini ,  Silvano Pupolin

IPC: H04L27/26 ,  H04B7/04

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

Abstract: An embodiment of the time-variant channel estimation in an OFDM transmission system envisages the operations of: a) determining the received signal vector Yj,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 Ĥj,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 Âk of the transmitted digital symbols at the current time instant k on the basis of the aforesaid frequency-domain channel-estimate vectors Ĥj,k−1 at the preceding time instant k−1; c) computing an updated version of the frequency-domain channel-estimate vectors Ĥj,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 Yj,k at the current time instant k and for each antenna j of one or more of R receiving antennas, using the aforesaid estimate Âk 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 Ĥj,k at the current time instant k and for each antenna j of one or more of R receiving antennas, for equalizing the paths of the transmission channel and decoding the received signal vectors Yj,k at the current time instant k and for each antenna j of one or more of R receiving antennas; and e) storing 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的实施例设想以下操作：a）确定R个接收天线中的一个或多个的接收信号矢量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Ĥj，k-1和一个或多个R个接收天线的每个天线j一起; b）根据前一时刻k-1的上述频域信道估计向量Ĥj，k-1，在当前时刻k产生所发送的数字符号的第一估计值k; c）基于当前时刻k处的接收信号矢量Yj，k计算当前时刻k的频域信道估计向量Ĥj，k和R个接收天线中的一个或多个的每个天线j的更新版本， 使用在当前时刻k的所发送的数字符号的上述估计k作为已知发送的数字符号的集合，使用当前时刻k和一个或多个R个接收天线的每个天线j; d）使用上述更新版本的当前时刻k的频域信道估计向量Ĥj，k和R个接收天线中的一个或多个的每个天线j，以均衡发送信道的路径并对 在当前时刻k处的接收信号矢量Yj，k和R个接收天线中的一个或多个的每个天线j; 以及e）在下一时刻k + 1的步骤a）和b）中存储用于使用它们的信道估计向量的更新版本。