公开(公告)号：US20090175261A1

公开(公告)日：2009-07-09

申请号：US12342131

申请日：2008-12-23

Applicant: Ji-sung OH ,  Jun-yeub LEE

Inventor： Ji-sung OH ,  Jun-yeub LEE

IPC: H04J3/06

CPC classification number: H04L7/041 ,  H04L1/0079 ,  H04L25/0224

Abstract: Provided are a method and apparatus for generating a preamble of a data packet. The method includes operations of generating a first field, a second field, and a third field; generating a synchronization sequence for synchronization between a data packet transmitter and a data packet receiver, generating a channel estimation sequence (CES) for estimation of a property of a channel in which the data packet is transmitted, and generating an additional sequence indicating an end position of the synchronization sequence in the preamble, and an additional sequence indicating information about a structure of the CES; and respectively recording the synchronization sequence, the additional sequences, and the CES in the first field, the second field, and the third field, thereby generating the preamble.

Abstract translation: 提供了一种用于生成数据分组的前同步码的方法和装置。 该方法包括产生第一场，第二场和第三场的操作; 生成用于数据分组发送器和数据分组接收器之间的同步的同步序列，生成用于估计发送数据分组的信道的属性的信道估计序列（CES），并产生指示结束位置的附加序列 以及指示关于CES的结构的信息的附加序列; 并且分别在第一场，第二场和第三场中记录同步序列，附加序列和CES，由此产生前导码。

公开(公告)号：US20130121442A1

公开(公告)日：2013-05-16

申请号：US13616506

申请日：2012-09-14

Applicant: Chang-hyun BAIK ,  Hyun-jung KO ,  Jun-yeub LEE ,  Jun-seok KANG

Inventor： Chang-hyun BAIK ,  Hyun-jung KO ,  Jun-yeub LEE ,  Jun-seok KANG

IPC: H04L27/36

CPC classification number: H04L27/36 ,  H04L1/0086 ,  H04L27/2601

Abstract: A method and an apparatus for mapping a quadrature amplitude modulation (QAM) symbol. The QAM symbol mapping apparatus includes a frequency checker, which checks frequencies of sub-carriers in an orthogonal frequency division multiplexing (OFDM) symbol; and a data categorizer, which maps data coded for error correction and uncoded data to the sub-carriers based on the checked frequencies, wherein the data categorizer maps a combination of the coded data and the uncoded data with respect to sub-carriers having frequencies lower than a reference frequency.

Abstract translation: 一种用于映射正交幅度调制（QAM）符号的方法和装置。 QAM符号映射装置包括频率检验器，其对正交频分复用（OFDM）符号中的子载波的频率进行检查; 以及数据分类器，其基于所检查的频率将用于纠错和未编码数据编码的数据映射到子载波，其中数据分类器针对具有频率较低的子载波来映射编码数据和未编码数据的组合 比参考频率。