公开(公告)号：KR1020090118717A

公开(公告)日：2009-11-18

申请号：KR1020080044665

申请日：2008-05-14

Applicant: 삼성전자주식회사 ,  한국과학기술원

Inventor： 이주현 ,  황성수 ,  윤상보 ,  이종호 ,  정성윤 ,  강준혁 ,  박경호 ,  차종섭 ,  장남석 ,  이건국

IPC: H04B7/04

CPC classification number: H04L25/03203 ,  H04L25/03191 ,  H04L25/0328 ,  H04L25/03343 ,  H04L2025/03426 ,  H04B7/0456 ,  H04B7/0452

Abstract: PURPOSE: A low complexity precoding device based on vector perturbation in a multi user multi antenna communication system is provided to obtain low complexity and similar performance. CONSTITUTION: A reference value of a cumulative branch metric of a candidate symbol is determined(S1). A candidate having a cumulative branch metric value is removed. The cumulative branch metric value exceeds the reference value of a cumulative branch metric value of a determined candidate symbol. The cumulative branch metric value of the candidate symbol is registered as entry(S2). The cumulative branch metric value of the candidate symbol does not exceed the reference value of a cumulative branch metric value of the candidate symbol. A cumulative branch metric value of the smallest candidate symbol among cumulative branch metric values registered as entry is selected(S3).

Abstract translation: 目的：提供一种基于多用户多天线通信系统中矢量扰动的低复杂度预编码设备，以获得低复杂度和类似性能。 构成：确定候选符号的累积分支量度的参考值（S1）。 具有累积分支量度值的候选者被去除。 累积分支度量值超过确定的候选符号的累积分支量度值的参考值。 候选符号的累积分支量度值被登记为条目（S2）。 候选符号的累积分支度量值不超过候选符号的累积分支量度值的参考值。 选择登记为条目的累积分支度量值中的最小候选符号的累积分支量度值（S3）。

公开(公告)号：KR1020090056727A

公开(公告)日：2009-06-03

申请号：KR1020070124007

申请日：2007-11-30

Applicant: 주식회사 케이티 ,  한국과학기술원

Inventor： 김영억 ,  이영탁 ,  강준혁 ,  장남석 ,  이남정

IPC: H04L27/26

CPC classification number: H04L27/2695 ,  H04L5/006 ,  H04L27/2614 ,  H04L27/2628 ,  H04L27/265 ,  H04L27/2666

Abstract: A method for transmitting data including an impulse symbol with the optimum size and a method for estimating a channel by the impulse symbol in an orthogonal frequency division multiplexing system are provided to improve a bit error rate while satisfying a proper PARP(Peak to Average Power Ratio). In an OFDM(Orthogonal Frequency Division Multiplexing) system, an impulse symbol with the optimum size for estimating a channel is inserted into the rear of the data symbol and the data is transmitted. A complex random variable obtained by modulating an OFDM data bit stream is converted into a signal in a time domain by the IDFT(Inverse Discrete Fourier Transform)(312). The specific number of null symbols and the impulse symbol for estimating the channel are inserted into a guard interval of the rear of the data symbol in the converted signal(313). The OFDM data symbols into which the impulse symbol is inserted are transmitted. The size of the impulse symbol is determined by a power boosting factor that is the numerical value for showing the multiple of the average power of the OFDM data symbol.

Abstract translation: 提供一种用于发送包括具有最佳大小的脉冲符号的数据的方法和用于在正交频分复用系统中通过脉冲符号估计信道的方法，以在满足适当的PARP（峰均功率比 ）。 在OFDM（正交频分复用）系统中，将具有用于估计信道的最佳大小的脉冲符号插入到数据符号的后部，并且发送数据。 通过调制OFDM数据比特流获得的复杂随机变量通过IDFT（逆离散傅立叶变换）在时域中被转换成信号（312）。 将空值的具体数目和用于估计信道的脉冲符号插入转换信号（313）中的数据符号后部的保护间隔。 发送插入脉冲符号的OFDM数据符号。 脉冲符号的大小由作为用于表示OFDM数据符号的平均功率的倍数的数值的功率提升因子决定。