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公开(公告)号：KR1020100064062A
公开(公告)日：2010-06-14
申请号：KR1020080122487
申请日：2008-12-04
Applicant: 한국전자통신연구원
IPC: H04B7/26 , H04L27/26 , H04L12/951
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：KR1020090063923A
公开(公告)日：2009-06-18
申请号：KR1020070131455
申请日：2007-12-14
Applicant: 한국전자통신연구원
CPC classification number: H04L25/0246 , H04L25/03006 , H04L2025/03414 , H04L2025/03426 , H04L27/2647 , H04B7/0413
Abstract: A QR disjoint device and a method thereof for reducing the operation complexity in a multi-input multi-output system and efficiently using the hardware are provided to simplify a hardware structure by sharing a multiplier, an adder and a subtracter. A norm calculating unit(201) calculates a vector norm about a channel input. A Q calculating unit(206) calculates a unit matrix by multiplexing a root value of the norm. A R calculating unit(209) calculates the line value of an upper-triangular matrix. A Q update calculator outputs update matrix value by inputting the delayed channel entry. A norm renewal calculating unit outputs a norm renewal matrix value.
Abstract translation: 提供了一种用于降低多输入多输出系统中的操作复杂度并有效地使用硬件的QR分离设备及其方法，以通过共享乘法器，加法器和减法器来简化硬件结构。 范数计算单元（201）计算关于频道输入的向量范数。 Q计算单元（206）通过对该范数的根值进行多路复用来计算单位矩阵。 R计算单元（209）计算上三角矩阵的行值。 Q更新计算器通过输入延迟通道条目输出更新矩阵值。 规范更新计算单元输出规范更新矩阵值。
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公开(公告)号：KR1020090063757A
公开(公告)日：2009-06-18
申请号：KR1020070131239
申请日：2007-12-14
Applicant: 한국전자통신연구원
CPC classification number: H04L25/03318 , H04B7/0413 , H04L1/02
Abstract: An effective bit calculating method used with a soft-decision decoding apparatus for improving performance while reducing the implementation complexity in a multi input multi output system and a method thereof in a multi input multi output system and a method thereof are provided to maximize channel decoding performance. One or more multiplier multiplies the soft demapper signal according to a modulation mode by the size shape value of the null matrix vectors outputted from the detector. An effective bit calculator(302) deletes a part of the lower bit about the output bit of the multiplication method and extracts the effective bit. The effective bit calculating unit compares the absolute value and threshold value of the rest bit. According to the comparison result, the definite value is set up as the upper bit or rounds in the number corresponding to the specific bit.
Abstract translation: 与多输入多输出系统中的多输入多输出系统中的实现复杂度降低的软判决解码装置一起使用的有效比特计算方法及其方法提供给信道解码性能最大化 。 一个或多个乘法器根据调制模式将软解映射器信号乘以从检测器输出的零矩阵向量的大小形状值。 有效位计算器（302）删除关于乘法方法的输出位的低位的一部分，并提取有效位。 有效位计算单元比较其余位的绝对值和阈值。 根据比较结果，将确定的值设置为与特定位相对应的数字中的高位或舍入。
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公开(公告)号：KR1020090063055A
公开(公告)日：2009-06-17
申请号：KR1020080036084
申请日：2008-04-18
Applicant: 한국전자통신연구원
IPC: H03M13/11
CPC classification number: H03M13/1134 , H03M13/116 , H03M13/6502 , H03M13/6561
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：KR100888504B1
公开(公告)日：2009-03-12
申请号：KR1020070024939
申请日：2007-03-14
Applicant: 한국전자통신연구원
Abstract: 본 발명은 다중 모드 무선랜을 위한 적응형 전압 참조값을 갖는 자동 이득 조절 장치 및 방법에 관한 것이다.
다중 안테나를 이용하는 무선 통신 시스템에서 자동 이득 조절 장치로 입력된 수신 신호의 모드에 따라 최적의 전압 참조값 즉 목표 이득을 산출하고, 산출된 목표 이득과 수신 신호의 전력 크기를 토대로 수신 신호의 이득을 조절한다. 따라서 다중 모드별로 각 모드에 최적의 목표 이득 값을 사용하여 이득을 조절하기 때문에, 모든 모드에서 가장 좋은 성능을 유지하도록 이득을 조절할 수 있으며, 최적의 수신 성능을 보장할 수 있다.
자동 이득 조절, 적응형 전압 참조값, 다중 안테나, 무선 랜, 목표 이득 값-
Patent Agency Ranking
公开(公告)号：KR1020080050209A
公开(公告)日：2008-06-05
申请号：KR1020070039256
申请日：2007-04-23
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0842 , H04B7/0456 , H04L27/2601
Abstract: 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).
Abstract translation: 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）。
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公开(公告)号：KR1020080050192A
公开(公告)日：2008-06-05
申请号：KR1020070024939
申请日：2007-03-14
Applicant: 한국전자통신연구원
CPC classification number: H03G3/3042 , H04B7/08 , H04W52/52
Abstract: An apparatus and a method for automatically controlling a gain having an adaptive voltage reference value for a multi-mode WLAN(Wireless LAN) are provided to control a gain to maintain the best performance in every mode and guarantee an optimum reception performance. A target gain detector(600) stores target gain information corresponding to a plurality of first signals inputted via a plurality of antennas, and outputs the target gain information based on signal modes corresponding to the respective first signals. An RF(Radio Frequency) receiving unit(100) receives the plural first signals via the plural antennas and controls gains with respect to the plurality of first signals based on the target gain information to output a plurality of second signals. If the number of second signals greater than a pre-set threshold value is more than a certain number, a signal saturation detecting unit(400) outputs a saturation state index determination value. An AGC(Automatic Gain Controller)(300) compares each power of the plural second signals, detects one power, and outputs a gain value determined based on the detected power and the saturation state index determination value to the target gain detector. A variable gain amplifier(120) which an LNA(Low Noise Amplifier)(121) and a VGA(Variable Gain Amplifier) module(122) adds gain to an RF signal inputted from each RF receiver(110) to amplify the RF signal which consists of an in-phase(I) signal and an orthogonal phase(Q) signal.
Abstract translation: 提供了一种用于自动控制具有用于多模式WLAN（无线LAN）的自适应电压参考值的增益的装置和方法，以控制增益以在每个模式中保持最佳性能并保证最佳接收性能。 目标增益检测器（600）存储与通过多个天线输入的多个第一信号对应的目标增益信息，并且基于对应于各个第一信号的信号模式输出目标增益信息。 RF（射频）接收单元（100）经由多个天线接收多个第一信号，并且基于目标增益信息来控制关于多个第一信号的增益，以输出多个第二信号。 如果大于预设阈值的第二信号的数量大于一定数量，则信号饱和度检测单元（400）输出饱和状态指标确定值。 AGC（自动增益控制器）（300）比较多个第二信号的每个功率，检测一个功率，并将基于检测到的功率和饱和状态指标确定值确定的增益值输出到目标增益检测器。 LNA（低噪声放大器）（121）和VGA（可变增益放大器）模块（122）的增益放大器（120）对从每个RF接收机（110）输入的RF信号增益增益，以放大RF信号， 由同相（I）信号和正交相位（Q）信号组成。
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公开(公告)号：KR1020070061131A
公开(公告)日：2007-06-13
申请号：KR1020060049871
申请日：2006-06-02
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2627 , H04L27/261 , H04L27/265 , H04W84/12
Abstract: A wireless LAN transmitting/receiving OFDM(Orthogonal Frequency Division Multiplexing) system for providing an extended service coverage and a method thereof are provided to extend a coverage with maintaining interoperability with an existing system. A wireless LAN transmitting/receiving OFDM system for providing an extended service coverage includes an OFDM modulation controlling unit, a frame generation controlling unit, a buffer unit, and an OFDM modulating unit. The OFDM modulation controlling unit controls first OFDM modulation at a time of even number, and controls second OFDM modulation changing an allocation position of each sub carrier of a first modulated OFDM symbol at a time of odd number. The frame generation controlling unit controls the generation of a frame consisting of a plurality of signal fields generated according to the first OFDM modulation and the second OFDM modulation. The buffer unit stores input data by units of the first and second OFDM modulations under control of the OFDM modulation controlling unit. The OFDM modulating unit performs repeatedly the modulation by the units of the first and the second OFDM modulations stored at the buffer unit, and constitutes the repeatedly modulated OFDM symbol into a frame under the control of the frame generation controlling unit.
Abstract translation: 提供了一种用于提供扩展服务覆盖的无线LAN发送/接收OFDM（正交频分复用）系统及其方法，以通过维持与现有系统的互操作来扩展覆盖。 用于提供扩展服务覆盖的无线LAN发送/接收OFDM系统包括OFDM调制控制单元，帧生成控制单元，缓冲单元和OFDM调制单元。 OFDM调制控制单元在偶数时控制第一OFDM调制，并且控制第二OFDM调制在奇数时改变第一调制OFDM符号的每个子载波的分配位置。 帧生成控制单元控制由根据第一OFDM调制和第二OFDM调制生成的多个信号场的帧的生成。 缓冲器单元在OFDM调制控制单元的控制下以第一和第二OFDM调制为单位存储输入数据。 OFDM调制单元重复执行存储在缓冲器单元中的第一和第二OFDM调制的单元的调制，并且在帧生成控制单元的控制下将重复调制的OFDM符号构成帧。
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公开(公告)号：KR100723308B1
公开(公告)日：2007-05-30
申请号：KR1020060041350
申请日：2006-05-09
Applicant: 한국전자통신연구원
Abstract: 본 발명은 멀티 캐리어를 이용한 신호 송/수신 장치에 관한 것이다.
본 발명에 따른 멀티 캐리어를 이용하여 데이터를 송신하는 신호 송신 장치는 수신되는 패킷 정보 비트를 특정 부호율을 갖도록 터보 코드로 부호화한 제1심볼을 생성하는 터보 코드 엔코더; 제1 심볼에 채널 인터리빙을 수행하는 채널 인터리버; 채널 인터리빙된 제1 심볼에 스크램블링을 수행하여 제2 심볼을 생성하는 스크램블러; 제2 심볼을 수신하여 변조하는 변조부; 변조된 제2 심볼을 왈시 코드를 이용하여 확산하는 확산 모듈; 및 확산모듈로부터 출력 신호를 수신하고, 수신된 신호에 포함된 비트의 일부를 제거하여 특정 개의 제3 심볼로 생성한 후에 파일럿 삽입, 역퓨리에 변환 및 프리픽스 삽입을 수행하는 신호 발생 모듈을 포함한다.
이러한, 본 발명에 따르면, 다중 경로에 의한 신호의 왜곡을 보상할 수 있는 장점이 있으며, 주파수 선택적 패이딩(Fading) 채널에서도 통신 성능이 좋은 효과를 기대할 수 있다.
또한, 종래의 CDMA2000 1xEV-DV시스템을 쉽게 변경하여 멀티 캐리어를 이용한 송/수신 장치로 구현이 가능한 장점이 있다.
OFDM, CDMA2000 1xEV-DV, 멀티 캐리어, MC, 송신장치, 수신 장치Abstract translation: 本发明涉及使用多载波的信号发送/接收装置。
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