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公开(公告)号：KR1020140101642A
公开(公告)日：2014-08-20
申请号：KR1020130015072
申请日：2013-02-12
Applicant: 경북대학교 산학협력단 , 충남대학교산학협력단
CPC classification number: H04B7/04 , H04J13/0059 , H04B7/0667 , H04B7/0684 , H04L1/0618 , H04L25/0204
Abstract: The present invention relates to a single carrier-based hybrid LDC system apparatus, comprising the following an LDC unit encoding at least one symbol including a CP using a hybrid LDC technique; a training sequence generation unit generating a training sequence with a CAZAC sequence encoded into a STBC; a transmission device including a frame unit for forming one transmission frame with a data stream encoded into symbols by the LDC unit and the CAZAC sequence encoded into the STBC by the training sequence generation unit; a separation unit separating the CAZAC sequence encoded into the STBC from the data stream of the transmission frame transmitted from the transmission device; a channel estimation unit estimating a channel from a frequency domain using the CAZAC sequence separated by the separation unit; and a reception device including a symbol recovery unit recovering the symbol encoded by the hybrid LDC technique using information on the channel estimated by the channel estimation unit. According to the present invention, the single carrier-based hybrid LDC system can transmit data at a transmission rate higher than that of an existing single carrier system, so can be adopted in a next generation broadcast system, or a 3DTV or UDTV broadcast system requiring a high transmission throughput.
Abstract translation: 本发明涉及一种基于单载波的混合LDC系统装置，其包括以下LDC单元，其使用混合LDC技术编码包括CP的至少一个符号; 训练序列生成单元，生成具有编码到STBC中的CAZAC序列的训练序列; 发送装置，包括用于通过由LDC单元编码为符号的数据流和由训练序列生成单元编码到STBC中的CAZAC序列来形成一个传输帧的帧单元; 分离单元，将从编码成STBC的CAZAC序列与从所述传输装置发送的所述传输帧的数据流分离; 信道估计单元使用由分离单元分离的CAZAC序列估计来自频域的信道; 以及接收装置，其包括符号恢复单元，使用由信道估计单元估计的信道的信息来恢复由混合LDC技术编码的符号。 根据本发明，基于单载波的混合LDC系统可以以比现有的单载波系统更高的传输速率发送数据，因此可以在下一代广播系统或需要的3DTV或UDTV广播系统中采用 传输吞吐量高。
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公开(公告)号：KR101097295B1
公开(公告)日：2011-12-22
申请号：KR1020100036259
申请日：2010-04-20
Applicant: 충남대학교산학협력단
IPC: H04L27/26
Abstract: 본발명의일실시예에따른 OFDM 시스템에서직접변환송수신기의 IQ 불균형추정및 보상방법은, 하나의 OFDM(Orthogonal Frequency Division Multiplexing) 심벌을사용하여 I/Q(In-phase/Quadrature-phase) 불균형성분(&egr;, &egr;, &thetas;, &thetas;) 및왜곡성분(α, &bgr;, γ, δ)을추정하는단계; 상기왜곡성분(α, &bgr;)을입력받아역 고속푸리에변환(IFFT: Inverse Fast Fourier Transform) 이후의시간영역에서기저대역송신신호를왜곡시키는단계; 및상기왜곡성분(γ, δ)을입력받아고속푸리에변환(FFT: Fast Fourier Transform) 이전의시간영역에서왜곡된기저대역수신신호를보상하는단계를포함한다.
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公开(公告)号：KR100461543B1
公开(公告)日：2004-12-16
申请号：KR1020020062484
申请日：2002-10-14
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0669 , H04J13/004
Abstract: A Signal-to-interference ratio (SIR) measuring apparatus in a multiple antenna high data rate packet transmission system measures signal energy to interference energy ratio by using pilot signals that are orthogonal to each other between antennas signals and used by a receiver for separating the signals transmitted from all of the transmitting antennas from each other. The SIR measuring apparatus comprises a signal energy measuring unit, an interference energy measuring unit and a SIR measuring unit. The signal energy measuring unit measures signal energy by synthesizing after coherently integrating and non-coherently integrating values that are obtained by correlating a received signal with pilot patterns equal to the pilot patterns of transmitted antenna signals, respectively. The interference energy measuring unit measures interference energy by coherently integrating and non-coherently integrating after correlating the received signal with another pattern that is orthogonal to the pilot patterns of the transmitted antenna signals but is not transmitted. The SIR measuring unit measures SIR by using the measured signal energy and the measured interference energy.
Abstract translation: 多天线高数据速率分组传输系统中的信号干扰比（SIR）测量设备通过使用在天线信号之间彼此正交的导频信号来测量信号能量干扰能量比，并由接收器用于分离 从所有发射天线彼此发射的信号。 SIR测量装置包括信号能量测量单元，干扰能量测量单元和SIR测量单元。 信号能量测量单元通过在相干积分和非相干积分之后进行合成来测量信号能量，所述积分值通过将接收信号与导频模式分别相等于所发送的天线信号的导频模式相关而获得。 干扰能量测量单元在将接收信号与正交于发射天线信号的导频模式但未发射的另一模式相关后，通过相干积分和非相干积分来测量干扰能量。 SIR测量单元通过使用测量的信号能量和测量的干扰能量来测量SIR。
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公开(公告)号：KR1020040033408A
公开(公告)日：2004-04-28
申请号：KR1020020062484
申请日：2002-10-14
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0669 , H04J13/004
Abstract: PURPOSE: An apparatus and a method for measuring an SIR(Signal-to-Interference Ratio) in a multi-antenna high-speed packet transmission system is provided to measure an SIR using pilot signals, which are orthogonal between antenna signals. CONSTITUTION: The first antenna pattern correlator(503) executes correlation for Rx signals, received through an orthogonal code and scramble code correlator(502) from a baseband Rx signal processing part in a receiver, using the same pattern as a pilot symbol pattern outputted from the first antenna pattern generator of a transmitter. The second antenna pattern correlator(506) executes correlation for Rx signals, received through the orthogonal code and scramble code correlator(502) from the baseband Rx signal processing part, using the same pattern as a pilot symbol pattern outputted from the second antenna pattern generator. The Rx signals are inputted to the first and second antenna signal combiners(509) through coherent integrators(504,507) and I/Q squarer/combiners(505,508). The first and second antenna signal combiners(509) execute non-coherent combining for the signals and outputs Rx signal energy(510).
Abstract translation: 目的：提供一种用于测量多天线高速分组传输系统中的SIR（信号与干扰比）的装置和方法，以使用在天线信号之间正交的导频信号来测量SIR。 构成：第一天线方向图相关器（503）通过正交码和加扰码相关器（502）从接收机中的基带Rx信号处理部分接收的Rx信号执行相关性，使用与从 发射机的第一个天线方向图发生器。 第二天线方向图相关器（506）使用与从第二天线图形发生器输出的导频符号图案相同的图案，执行从基带Rx信号处理部分通过正交码和密码相关器（502）接收的Rx信号的相关性 。 Rx信号通过相干积分器（504,507）和I / Q平方/组合器（505,508）输入到第一和第二天线信号组合器（509）。 第一和第二天线信号组合器（509）执行信号的非相干组合并输出Rx信号能量（510）。
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