公开(公告)号：US20080298485A1

公开(公告)日：2008-12-04

申请号：US12023034

申请日：2008-01-31

申请人： JingHui LU

发明人： JingHui LU

IPC分类号： H04K1/10

CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L5/005 ,  H04L27/2659

摘要： Techniques for determining positions of pilot sub-carries in a received OFDM symbol are described. Components of pilot sub-carries from a theoretical OFDM symbol are extracted to form M theoretical pilot sequences according to M possible distributions in frequency domain of the pilot sub-carries in the theoretical OFDM symbol. Components of pilot sub-carries from the received OFDM symbol are also extracted to form K hypothetical pilot sequences according to K possible distributions in frequency domain of pilot sub-carries in the received OFDM symbol. The correlations of every two adjacent elements of the theoretical pilot sequences are calculated to get M corresponding theoretical correlation sequences, and the correlations of every two adjacent elements of the hypothetical pilot sequence are also calculated to get K corresponding hypothetical correlation sequences. Sequence correlations between the hypothetical correlation sequences and the theoretical correlation sequences are then calculated. The positions of pilot sub-carriers in the received OFDM symbol can be determined from the one that has the maximum modulus value.

摘要翻译： 描述用于确定接收的OFDM符号中的导频子载波的位置的技术。 根据理论OFDM符号中的导频子载波的频域中的M个可能分布，提取理论OFDM符号的导频子载波的分量，形成M个理论导频序列。 根据接收到的OFDM符号中的导频子载波的频域中的K个可能分布，也提取从接收的OFDM符号导频子载波的分量，以形成K个假设导频序列。 计算理论导频序列的每两个相邻元素的相关性以得到M个对应的理论相关序列，并且还计算假设导频序列的每两个相邻元素的相关性以获得K个相应的假设相关序列。 然后计算假设相关序列与理论相关序列之间的序列相关性。 可以从具有最大模数值的导频子载波中确定接收的OFDM符号中的导频子载波的位置。