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    • 33. 发明公开
    • 협력 STBC-OFDM 신호 중계 방법, 수신 방법, 릴레이 장치, 수신 장치 및 송수신 시스템
    • 合作STBC-OFDM信号继电方式,接收方式,接收装置,接收装置和传输与接收系统
    • KR1020130019125A
    • 2013-02-26
    • KR1020110081091
    • 2011-08-16
    • 성균관대학교산학협력단
    • 최형진원경훈
    • H04B7/14H04B7/02H04L27/26
    • H04B7/026H04B7/155H04B7/2606H04W84/047
    • PURPOSE: A cooperative STBC-OFDM(Space-Time Block Coded-Orthogonal Frequency Division Multiplexing) signal relaying method, a receiving method, a relay device, a receiving device, and a transceiving system are provided to obtain a diversity gain without exchanging information between a source node and a relay node. CONSTITUTION: A receiving unit(910) receives a first transmission signal from a source node. A transmission unit(920) encodes a second transmission signal before a symbol section of a first transmission signal. The transmission unit transmits the encoded signal to a destination node. The destination node encodes signals received from the source node and a relay node by removing interference signals. [Reference numerals] (900) Relay device; (910) Receiving unit; (920) Transmission unit
    • 目的:提供协作STBC-OFDM(空时块编码 - 正交频分复用)信号中继方法,接收方法,中继设备,接收设备和收发系统,以获得分集增益,而不在 源节点和中继节点。 构成:接收单元(910)从源节点接收第一传输信号。 发送单元(920)在第一发送信号的符号部分之前对第二发送信号进行编码。 发送单元将编码信号发送到目的地节点。 目的地节点通过去除干扰信号来编码从源节点和中继节点接收的信号。 (附图标记)(900)继电器件; (910)接收单元; (920)传输单元
    • 35. 发明公开
    • OFDM 시스템을 위한 도플러 주파수 추정 방법 및 도플러 주파수를 추정하는 수신기
    • 多普勒频率估计方法及OFDM系统多普勒频率估计的接收机
    • KR1020120019860A
    • 2012-03-07
    • KR1020100083399
    • 2010-08-27
    • 성균관대학교산학협력단
    • 최형진장준희김정인
    • H04L27/26H04B1/16
    • H04L27/2647
    • PURPOSE: A method for estimating a doppler frequency and a receiver for estimating a doppler frequency for an OFDM(Orthogonal Frequency Division Multiplexing) system are provided to improve the performance of a receiver by offering an excellent performance for estimating a doppler frequency. CONSTITUTION: A method for estimating a doppler frequency through a receiver in an orthogonal frequency division multiplexing system includes a step in which a channel frequency response is estimated for a pilot symbol in a block received. The method for estimating the doppler frequency includes the step in which an average correlation value of the channel frequency response is calculated. The method for estimating the doppler frequency includes the step in which the average value of accumulated R1 is calculated for the block of Nacc. The method for estimating the doppler frequency includes the step in which the doppler frequency is calculated based on the average value of the R1 calculated.
    • 目的:提供一种用于估计多普勒频率的方法和用于估计OFDM(正交频分复用)系统的多普勒频率的接收机,以通过提供用于估计多普勒频率的优异性能来提高接收机的性能。 构成:用于在正交频分复用系统中通过接收机估计多普勒频率的方法包括对接收到的块中的导频符号估计信道频率响应的步骤。 用于估计多普勒频率的方法包括计算信道频率响应的平均相关值的步骤。 用于估计多普勒频率的方法包括对于Nacc的块计算累积R1的平均值的步骤。 用于估计多普勒频率的方法包括基于所计算的R1的平均值来计算多普勒频率的步骤。
    • 37. 发明公开
    • P-SCH 검출 방법 및 이를 위한 수신기
    • P-SCH检测方法和接收器
    • KR1020110041200A
    • 2011-04-21
    • KR1020090098265
    • 2009-10-15
    • 성균관대학교산학협력단
    • 최형진장준희정명진
    • H04B1/69H04W48/16
    • H04L27/2675H04B1/692H04J11/0069H04L27/2657
    • PURPOSE: A P-SCH(Primary Synchronization CHannel) detection method and a receiver for the same are provided to minimize the deterioration of the P-SCH detection performance due to the correlation characteristic deterioration in a multi path fading environment. CONSTITUTION: A frequency offset estimator(110) comprises a linear phase rotation value estimating unit and phase rotation amount calculation unit. The frequency offset estimator estimates the phase rotation amount rotated by the frequency offset. A compensator(120) compensates according to the phase rotation value which is offered from the frequency offset estimator. A correlator(130) performs cross correlation based on the phase rotation value compensated received signal. A P-SCH detector(140) detects a P-SCH based on the output from the correlator.
    • 目的:提供P-SCH(主同步信道)检测方法及其接收机,以便由于多径衰落环境中的相关特性劣化而使P-SCH检测性能的恶化最小化。 构成:频率偏移估计器(110)包括线性相位旋转值估计单元和相位旋转量计算单元。 频率偏移估计器估计旋转频率偏移的相位旋转量。 补偿器(120)根据从频率偏移估计器提供的相位旋转值进行补偿。 相关器(130)基于相位旋转值补偿的接收信号执行互相关。 P-SCH检测器(140)根据相关器的输出来检测P-SCH。
    • 38. 发明公开
    • 무선 통신 시스템의 채널 및 간섭 추정 방법 및 장치
    • 一种无线通信系统中信道和干扰估计的方法及其装置
    • KR1020100070478A
    • 2010-06-28
    • KR1020080129037
    • 2008-12-18
    • 삼성전자주식회사성균관대학교산학협력단
    • 김성수최형진한정수장준희
    • H04B7/005H04B15/00H04L27/26
    • H04L27/2695H04L27/265H04L27/2691
    • PURPOSE: A method for estimating a channel and interference of a wireless communication system and a device thereof are provided to perform channel estimation and interference estimation by using a reference symbol of a received signal and a temporarily detected data symbol. CONSTITUTION: A detector detects a temporary data symbol in a received signal which the channel compensation and interference cancellation are performed. A channel estimator(380) presumes an initial channel by using a reference symbol of a received signal including a reference symbol and a data symbol. The channel estimator presumes a final channel by using the temporary data symbol. An interference estimator presumes an initial interference by using the reference symbol of a received signal including the reference symbol and the data symbol. The interference estimator presumes a final interference by using the presumed final channel and the temporary data symbol.
    • 目的:提供一种用于估计无线通信系统及其装置的信道和干扰的方法,以通过使用接收信号的参考符号和临时检测的数据符号来执行信道估计和干扰估计。 构成:检测器检测在执行信道补偿和干扰消除的接收信号中的临时数据符号。 信道估计器(380)通过使用包括参考符号和数据符号的接收信号的参考符号来假定初始信道。 信道估计器通过使用临时数据符号来假设最终的信道。 干扰估计器通过使用包括参考符号和数据符号的接收信号的参考符号来假设初始干扰。 干扰估计器通过使用推定的最终通道和临时数据符号来假设最终的干扰。
    • 39. 发明授权
    • 인말새트 통신의 하향 링크 수신기
    • Inmarsat通信的下行链路接收器
    • KR100956128B1
    • 2010-05-06
    • KR1020080025366
    • 2008-03-19
    • 성균관대학교산학협력단
    • 최형진한정수조병창
    • H04B7/14H04B1/06
    • H04L7/042
    • 인말새트 통신의 하향 링크 수신기가 개시된다. 인말새트(INMARSAT) 통신의 하향 링크 수신기는 아날로그 수신신호를 디지털로 변환하여 디지털 신호 r(k)를 출력하는 에이디씨(Analog to Digital Converter); 디지털 신호 r(k)를 이용하여 제1 데이터를 복원하는 제1 인터폴레이터(interpolater); r(k)와, r(k-1)의 켤레 복소수를 곱하여 차동 신호를 생성하고, 차동신호의 파워를 이용하여 유니크 워드(Unique Word)의 유무를 판단하는 UW 검출기; 차동신호를 입력받아 제2 데이터를 복원하는 제2 인터폴레이터; 제2 데이터에서 시간상 오차를 검출하여 시차를 출력하는 시차 검출기; 시차에 따른 심볼 복원 중심 상수 및 심볼 복원 간격 상수를 출력하는 컨트롤러를 포함하되, 심볼 복원 중심 상수 및 심볼 복원 간격 상수는 제1 및 제2 인터폴레이터에 입력되는 것을 특징으로 한다. 본 발명에 따르면, 인말새트 Mini-m 시스템을 이용한 통신환경에서, 수신되는 수신신호로부터 신뢰성이 있도록 데이터 심볼을 샘플링한다는 장점이 있다.
      인말새트, 하향 링크 수신기, 샘플링, 지터, 시차
    • 40. 发明公开
    • 광대역 무선접속 통신 시스템에서 주파수 동기를 위한 상관장치 및 방법
    • 宽带无线接入通信系统中频率同步的相关设备及方法
    • KR1020090084382A
    • 2009-08-05
    • KR1020080010538
    • 2008-02-01
    • 삼성전자주식회사성균관대학교산학협력단
    • 노희진이정길윤수진강훈백창현강준규최형진임세빈이대홍
    • H04L7/00H04L27/26
    • H04L27/2688H04L27/2659H04L27/2672H04L27/2675
    • A correlation apparatus for frequency synchronization in a broadband wireless access communication system and a correlation method thereof are provided to improve the frequency synchronization performance by performing the frequency synchronization according to the highest correlation value. A frequency synchronizing unit(300) includes a delay and conjugate complex processor(350) and a correlator(340). The delay and conjugate complex processor delays as much as the predetermined interval after the FFT(Fast Fourier Transform) and generates a first signal by multiplying the signal after the FFT(Fast Fourier Transform) processing by the conjugate complex processed reception signal. The correlation unit receives a first signal, a second signal, and a third signal, and obtains the highest correlation value by producing the differential correlation value about the first signal and third signal. The second signal is generated by multiplying the conjugate complex of the reference signal by the delayed signal based on the reference signal. The third signal is produced by the signal delaying the second signal by the conjugate complex signal. A frequency controller(330) performs the frequency synchronization according to the highest correlation value.
    • 提供宽带无线接入通信系统中的频率同步的相关装置及其相关方法,以通过根据最高相关值执行频率同步来提高频率同步性能。 频率同步单元(300)包括延迟和共轭复合处理器(350)和相关器(340)。 延迟和共轭复合处理器在FFT(快速傅立叶变换)之后的预定时间间隔延迟并且通过将FFT(快速傅里叶变换)处理之后的信号乘以共轭复数处理的接收信号而产生第一信号。 相关单元接收第一信号,第二信号和第三信号,并且通过产生关于第一信号和第三信号的差分相关值来获得最高相关值。 通过基于参考信号将参考信号的共轭复乘乘以延迟的信号来产生第二信号。 第三信号由通过共轭复信号延迟第二信号的信号产生。 频率控制器(330)根据最高的相关值进行频率同步。