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    • 31. 发明公开
    • 프레임 동기 방법
    • 帧同步方法
    • KR1020110067878A
    • 2011-06-22
    • KR1020090124653
    • 2009-12-15
    • 한국전자통신연구원
    • 윤찬호
    • H04W56/00H04W84/12
    • H04W56/003H04L27/2656
    • PURPOSE: A frame synchronization method is provided to perform efficient frame synchronization by accurately recognizing a frame starting point in a reception end and to reduce data processing delay. CONSTITUTION: Input data is transformed to a parallel type(200). The cross correlation is applied to the transformed parallel data(210). A channel estimation sequence of input data is applied(230). A result value for cross-correlation with parallel data is correlated with a result value for cross-correlation with channel estimation sequence data. A frame synchronous point is extracted from the result value(240).
    • 目的:提供一种帧同步方法,通过准确识别接收端的帧起始点并减少数据处理延迟来执行高效的帧同步。 构成:输入数据转换为并行类型(200)。 互相关应用于变换的并行数据(210)。 应用输入数据的信道估计序列(230)。 与并行数据互相关的结果值与与信道估计序列数据互相关的结果值相关。 从结果值(240)中提取帧同步点。
    • 35. 发明公开
    • 패킷의 종단을 검출할 수 있는 패킷 송수신 방법 및 장치
    • 用于发送和接收分组包的检测端的方法和装置
    • KR1020100064062A
    • 2010-06-14
    • KR1020080122487
    • 2008-12-04
    • 한국전자통신연구원
    • 최은영윤찬호이일구이석규
    • H04B7/26H04L27/26H04L12/951
    • H04L12/56H04J11/00H04W28/06
    • PURPOSE: A packet transmit-receive method and an apparatus capable of recognizing a termination of the packet are provided to accurately recognize the termination of the packet without loss of a packet throughput by detecting additional data including termination information of the packet. CONSTITUTION: A packet end training preamble(202) showing a termination of corresponding packet is inserted into the packet used to existing OFDM system. A length of the packet is increased by inserting the packet end training preamble into the packet. The increase of the packet length not brings the loss of a packet throughput. A packet transmission method includes a step inserting an additional data to the packet including the preamble for a data and the data. The packet transmission method includes the step of transmitting the packet and the additional data. The additional data includes termination information of the packet.
    • 目的:提供分组发送接收方法和能够识别分组终止的装置,以通过检测包括分组的终止信息的附加数据来精确地识别分组的终止而不损失分组吞吐量。 构成:将表示相应分组的终止的分组结束训练前导码(202)插入到用于现有OFDM系统的分组中。 通过将分组结束训练前导码插入到分组中来增加分组的长度。 分组长度的增加不会导致分组吞吐量的损失。 分组发送方法包括向包括数据的前导码和数据的分组插入附加数据的步骤。 分组传输方法包括发送分组和附加数据的步骤。 附加数据包括分组的终止信息。
    • 38. 发明公开
    • 메시지 전달 알고리즘을 이용한 LDPC 코드 부호화 장치및 그 방법
    • 使用消息传递算法编码LDPC码的装置和方法
    • KR1020090063055A
    • 2009-06-17
    • KR1020080036084
    • 2008-04-18
    • 한국전자통신연구원
    • 윤찬호손정보강헌식이석규
    • H03M13/11
    • H03M13/1134H03M13/116H03M13/6502H03M13/6561
    • An apparatus and a method for encoding a LDPC(Low Density Parity Code) are provided to reduce complexity of hardware by calculating a check node value and a parity bit using a message passing algorithm applying an offset. An input converter(1110) converts a type of an input bit from a binary type to a decimal type with a sign. A parity calculator(1120) calculates a parity bit by calculating a check node value about the input bit and an arbitrary parity bit according to the message passing algorithm. A parity corrector(1130) corrects the calculated parity bit according to the parity check result of the calculated parity bit. An output converter(1140) couples the input bit and the corrected parity bit.
    • 提供了一种用于编码LDPC(低密度奇偶校验码)的装置和方法,用于通过使用应用偏移的消息传递算法计算校验节点值和奇偶校验位来降低硬件的复杂度。 输入转换器(1110)将具有符号的二进制类型的输入比特的类型转换为十进制类型。 奇偶校验计算器(1120)通过根据消息传递算法计算关于输入位和任意奇偶校验位的校验节点值来计算奇偶校验位。 奇偶校验器(1130)根据所计算的奇偶校验位的奇偶校验结果来校正所计算的奇偶校验位。 输出转换器(1140)耦合输入位和校正奇偶校验位。
    • 40. 发明公开
    • 무선 통신 시스템의 신호 수신 방법 및 장치
    • 无线通信系统接收信号的方法与装置
    • KR1020080050209A
    • 2008-06-05
    • KR1020070039256
    • 2007-04-23
    • 한국전자통신연구원
    • 윤찬호이일구손정보최은영이석규방승찬황승구
    • H04B7/02H04L27/26H04B7/26
    • H04B7/0842H04B7/0456H04L27/2601
    • A method and an apparatus for receiving signals of a wireless communication system are provided to accomplish a high transmission rate and high link level performance by detecting received signals by using a linear equalizer in a ZF(Zero Forcing) manner and applying a weight value according to noise amplification, and reduce complexity of a receiving end. A receiving end receives signals via reception antennas(S311). CPRs(CP Removers) remove CPs(Cyclic Prefixes) the received signals and input them to FFTs(Fast Fourier Transformers). The FFTs perform FFT on the outputs of the CPRs(S312). The reception signals are converted into reception vectors(S313). An inverse matrix of an effective channel matrix of the received signals is obtained and applied to a ZF equalizer(S314). The ZF equalizer multiplies the inverse matrix of the effective channel matrix to the reception vector(S315) to detect signals(S316).
    • 提供一种用于接收无线通信系统的信号的方法和装置,以通过使用ZF(零强制)方式的线性均衡器检测接收信号来实现高传输速率和高链路级性能,并且根据 噪声放大,并降低接收端的复杂性。 接收端通过接收天线接收信号(S311)。 CPR(CP去除器)删除接收信号的CP(循环前缀)并将其输入到FFT(快速傅立叶变换器)。 FFT对CPR的输出执行FFT(S312)。 接收信号被转换为接收矢量(S313)。 获得接收信号的有效信道矩阵的逆矩阵并将其应用于ZF均衡器(S314)。 ZF均衡器将有效信道矩阵的逆矩阵与接收矢量相乘(S315)以检测信号(S316)。