-
公开(公告)号：KR1020120051460A
公开(公告)日：2012-05-22
申请号：KR1020100112903
申请日：2010-11-12
Applicant: 한국전자통신연구원 , 충남대학교산학협력단
IPC: H04J11/00
CPC classification number: H04B1/123 , H04J11/00 , H04L25/0224 , H04L27/2695
Abstract: PURPOSE: A receiving apparatus in an OFDM(Orthogonal Frequency Division Multiplexing) system is provided to detect reception signals by estimating distortion matrices combining the unbalanced component of in-phase signals and Quadrature-phase signals and a channel frequency response characteristic. CONSTITUTION: A distortion matrix estimating unit receives a preamble signal including two different long training field symbols. The distortion matrix estimating unit estimates a distortion matrix. An OFDM(Orthogonal Frequency Division Multiplexing) signal processing unit compensates for distortion components from the reception signals by using the distortion matrix. A transmitter includes a preamble generation unit and an OFDM signal processing unit. The preamble generation unit transmits the preamble through two symbol periods by applying Alamouti technique to make a 2x2 non-singular matrix. The OFDM signal processing unit processes transmission signals and the preamble by OFDM.
Abstract translation: 目的：提供OFDM（正交频分复用）系统中的接收装置，通过估计组合同相信号的不平衡分量和正交相位信号以及信道频率响应特性的失真矩阵来检测接收信号。 构成：失真矩阵估计单元接收包括两个不同的长训练场符号的前导码信号。 失真矩阵估计单元估计失真矩阵。 OFDM（正交频分复用）信号处理单元通过使用失真矩阵来补偿来自接收信号的失真分量。 发射机包括前导码生成单元和OFDM信号处理单元。 前导码生成单元通过应用Alamouti技术来形成2×2个非奇异矩阵，通过两个符号周期来发送前同步码。 OFDM信号处理单元通过OFDM处理发送信号和前导码。
-
Patent Agency Ranking
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。
-
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.
-
公开(公告)号：KR101279948B1
公开(公告)日：2013-07-05
申请号：KR1020110110181
申请日：2011-10-26
Applicant: 충남대학교산학협력단
Abstract: 본 발명은 단일 주파수 망(SFN-Single Frequency Network)내에 싱글 캐리어 주파수 분할 다중 접속(SC-FDE)기반의 3D 고선명 텔레비전의 환경 적응적 데이터 수신율을 보장할 수 있는 기술에 관한 것으로, 본 발명에 따른 고선명 텔레비전의 지상파 수신을 위한 계층변복조 시스템은 단일 주파수 망 내에서 단일 캐리어 주파수분할 다중 접속(SC-FDE : Single Carrier FDMA) 기반의 지상파 신호를 처리하는 송신부 및 수신부로 구성되되, 상기 송신부는 송신신호를 계층 변조하는 계층변조부, 채널 추정을 위한 보호구간인 UW(Unique Word)을 제공하는 보호구간제공부 및 상기 계층변조부와 상기 보호구간삽입부와 연결되어, 상기 계층변조부에서 생성된 변조 신호에 보호구간 신호를 삽입하여, 프레임을 구성하는 보호구간합성부를 포함하는 것을 기술적 특징으로 한다.
-
公开(公告)号：KR1020110116692A
公开(公告)日：2011-10-26
申请号：KR1020100036259
申请日：2010-04-20
Applicant: 충남대학교산학협력단
IPC: H04L27/26
CPC classification number: H04L27/2636 , H04L27/2089
Abstract: 본 발명의 일실시예에 따른 OFDM 시스템에서 직접변환 송수신기의 IQ 불균형 추정 및 보상 기법은, 하나의 OFDM(Orthogonal Frequency Division Multiplexing) 심벌을 사용하여 I/Q(In-phase/Quadrature-phase) 불균형 성분(ε
tx , ε
rx , θ
tx , θ
rx ) 및 왜곡 성분(α, β, γ, δ)을 추정하는 단계; 상기 왜곡 성분(α, β)을 입력받아 역 고속 푸리에 변환(IFFT: Inverse Fast Fourier Transform) 이후의 시간 영역에서 기저대역 송신신호를 왜곡시키는 단계; 및 상기 왜곡 성분(γ, δ)을 입력받아 고속 푸리에 변환(FFT: Fast Fourier Transform) 이전의 시간 영역에서 왜곡된 기저대역 수신신호를 보상하는 단계를 포함한다.-
公开(公告)号：KR1020130045768A
公开(公告)日：2013-05-06
申请号：KR1020110110181
申请日：2011-10-26
Applicant: 충남대학교산학협력단
CPC classification number: H04L27/26 , H04N11/008
Abstract: PURPOSE: A layer modulation and demodulation system for ground wave reception in a high definition television is provided to guarantee a minimum data receiving rate in a region having a low signal to noise ratio and a maximum data receiving rate in a region having a high signal to noise ratio. CONSTITUTION: A transmitter(100) includes a layer modulation unit(110), a protection range provider(120), and a protection range integrator(130). The layer modulation unit modulates a transmission signal by layer. The protection range provider provides a protection range for channel estimation. The protection range provider includes a frame by being connected to the layer modulation unit and a protection range insertion unit and inserting a protection range signal into the modulated signal generated in the layer modulation unit. A receiver(200) includes a synchronizer(210), a data separator(230), a channel processor(240), and an N range processor(235). The synchronizer is connected to a reception antenna and synchronizes a reception signal. The data separator is connected to the synchronizer and separates data from a UW range. The channel processor is connected to the data separator, estimates a channel in a frequency domain about a Q range, and compensates the channel in a frequency domain equalizer block. An N range processor is connected to the data separator and processes the signal of an N range.
Abstract translation: 目的：提供一种用于高分辨率电视中的地面波接收的层调制解调系统，以保证在具有较高信号的区域中具有低信噪比和最大数据接收速率的区域中的最小数据接收速率 噪音比。 构成：发射器（100）包括层调制单元（110），保护范围提供器（120）和保护范围积分器（130）。 层调制单元逐层调制发送信号。 保护范围提供者为信道估计提供保护范围。 保护范围提供者包括通过连接到层调制单元和保护范围插入单元的帧，并将保护范围信号插入到在层调制单元中生成的调制信号中。 接收器（200）包括同步器（210），数据分离器（230），通道处理器（240）和N范围处理器（235）。 同步器连接到接收天线并同步接收信号。 数据分离器连接到同步器，并将数据与UW范围分离。 信道处理器连接到数据分离器，估计频域中关于Q范围的信道，并补偿频域均衡器块中的信道。 N范围处理器连接到数据分离器并处理N范围的信号。
-
-
-
-
-
Search Results
6
records
(took 0.02 seconds)
