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公开(公告)号：KR1020100042028A
公开(公告)日：2010-04-23
申请号：KR1020080101136
申请日：2008-10-15
Applicant: 세종대학교산학협력단
IPC: H04L27/26
CPC classification number: H04L27/2649 , H04L1/0631 , H04L1/0643 , H04L27/34
Abstract: PURPOSE: A method and an apparatus for decode hybrid STBC signals are provided to demodulation performance of MIMO OFDM system by reducing the deterioration of performance in an SM signal interference effect at a conventional hybrid-STBC modulation mode. CONSTITUTION: A channel estimation process is performed by receiving a hybrid STBC signal(100). An STBC signal is detected from the received hybrid STBC signal(110). The SM signal is detected by eliminating a detected STBC signal from the received hybrid STBC signal(120). The STBC signal is repeatedly detected by eliminating the detected SM signal from the received hybrid STBC signal(130). The STBC signal is determined as a final STBC signal(140).
Abstract translation: 目的：通过降低传统混合STBC调制模式下的SM信号干扰效应中性能的恶化，将混合STBC信号解码的方法和装置提供给MIMO OFDM系统的解调性能。 构成：通过接收混合STBC信号（100）来执行信道估计处理。 从所接收的混合STBC信号（110）检测STBC信号。 通过从接收到的混合STBC信号（120）中消除检测到的STBC信号来检测SM信号。 通过从接收到的混合STBC信号（130）中消除检测到的SM信号来重复检测STBC信号。 STBC信号被确定为最终STBC信号（140）。
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公开(公告)号：KR100939357B1
公开(公告)日：2010-01-29
申请号：KR1020070103695
申请日：2007-10-15
Applicant: 세종대학교산학협력단
Abstract: 본 발명은 다중 안테나를 사용하는 무선 통신 시스템에서의 향상된 신호 검출장치 및 그 방법을 개시한다.
본 발명에 따르면, 다중 안테나를 사용하는 디지털 무선 통신 시스템에서 보다 더 정확한 전송신호의 검출을 위해 효율적인 신호 검출 방법을 적용함으로써 신호의 검출성능을 효과적으로 증가시킬 수 있으며, 그 결과 기존의 QRD-M검출방식에 비해 매우 적은 양의 성능 감쇄를 가지며 통신 시스템의 복잡도를 크게 낮출 수 있으며, 특히, 필요에 따라서 그 검출에 대한 설정을 다양하게 변화시켜 무선 통신 시스템의 복잡도와 검출성능을 조절할 수 있다는 장점을 제공한다.-
公开(公告)号：KR1020090118758A
公开(公告)日：2009-11-18
申请号：KR1020080044737
申请日：2008-05-14
Applicant: 세종대학교산학협력단
IPC: H04L27/26
CPC classification number: H04L27/2626 , H04L5/006
Abstract: PURPOSE: A multi-carrier transmitter and a method thereof are provided to reduce complexity and overhead by selecting a different modulation mode to a subcarrier according to a channel environment. CONSTITUTION: A modulation mode selecting part(10) receives a channel environment value through a feedback channel from a receiver(2). The modulation mode selecting part selects a modulation mode which determines a bit number assigned to a subcarrier based on the channel environment value. The modulation mode selecting part selects a modulation mode which determines a bit number assigned to a subcarrier based on an error rate. A bit assigning part(11) assigns the bit number to each subcarrier according to the selected modulation mode. A sub-block setting part(12) determines a modulation mode by binding adjacent subcarriers into a sub-block. A demodulator(21) demodulates a signal transmitted from a transmitter(1) according to the modulation mode. A channel environment value calculating part(22) calculates a channel environment value by using the demodulated signal.
Abstract translation: 目的：提供一种多载波发射机及其方法，以通过根据信道环境向子载波选择不同的调制模式来降低复杂度和开销。 构成：调制模式选择部分（10）通过来自接收机（2）的反馈信道接收信道环境值。 调制模式选择部分根据信道环境值选择确定分配给子载波的比特数的调制模式。 调制模式选择部分选择基于错误率确定分配给子载波的比特数的调制模式。 比特分配部分（11）根据选择的调制方式将比特数分配给每个子载波。 子块设置部分（12）通过将相邻子载波绑定到子块中来确定调制模式。 解调器（21）根据调制模式解调从发送器（1）发送的信号。 信道环境值计算部（22）使用解调信号来计算信道环境值。
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74.发明授权디.씨.엠.을 사용하는 유.더블유.비.용엠.비.-오.에프.디.엠 시스템에서 효율적인 연판정 복조방법 및 그 장치 失效用于在MB-OFDM UWB系统中的DCM的有效的SFT决定解码的方法和装置
公开(公告)号：KR100880664B1
公开(公告)日：2009-01-30
申请号：KR1020070103697
申请日：2007-10-15
Applicant: 세종대학교산학협력단
IPC: H04L27/26
CPC classification number: H04L27/2649 , H04L25/03318 , H04L27/2695 , H04L2201/06
Abstract: The efficient soft-decision demodulation method and the apparatus are provided from the MB-OFDM UWB system using the DCM is provided to reduce the loss of diversity by using the channel state information. The receiver comprises the pre-processor(40), the decision metric part(41), the channel estimator(42), the reliability decision unit(43) and soft-decision demodeulator(44). The pre-processor extracts the baseband signal from the received DCM MB-OFDM signal. The pre-processor converts the extracted signal into the digital signal. The pre -processor performs the FFT(Fast Fourier Transform) about the digital signal. The channel estimator estimates the channel from the signal passing through FFT. The channel estimation is performed by using the channel estimation sequence.
Abstract translation: 提供了使用DCM的MB-OFDM UWB系统提供的高效软判决解调方法和装置，以通过使用信道状态信息来减少分集丢失。 接收机包括预处理器（40），判定度量部分（41），信道估计器（42），可靠性判定单元（43）和软判决解码器（44）。 预处理器从接收到的DCM MB-OFDM信号中提取基带信号。 预处理器将提取的信号转换成数字信号。 预处理器执行关于数字信号的FFT（快速傅里叶变换）。 信道估计器从通过FFT的信号估计信道。 通过使用信道估计序列来进行信道估计。
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公开(公告)号：KR1020080004917A
公开(公告)日：2008-01-10
申请号：KR1020060063847
申请日：2006-07-07
Applicant: 세종대학교산학협력단
CPC classification number: H04L1/0054 , H04B7/0857
Abstract: An apparatus for efficient signal detection in a multiple antenna system and a method thereof are provided to increase capacity of a system by optimally and stably detecting signals. An apparatus for efficient signal detection in a multiple antenna system includes an antenna array(10), a candidate group setting unit(20), a signal detection unit(30), and a final signal selection unit(40). The antenna array consists of an antenna group of a plurality of antennas and receives signals through multiple antennas. The candidate group setting unit determines number, V, of temporary candidate groups for signal detection. The signal detection unit includes first and second units. The first unit detects V symbols at first. The second unit detects M-1 length of V detection rows to detect final M length of V candidate groups. The final signal selection unit selects a signal row nearest to a receiving signal through ML(Maximum Likelihood) to determining the signal as a final detection signal.
Abstract translation: 提供了一种用于多天线系统中的有效信号检测的装置及其方法，以通过最佳和稳定地检测信号来增加系统的容量。 一种用于多天线系统中有效信号检测的装置，包括天线阵列（10），候选群组设定单元（20），信号检测单元（30）和最终信号选择单元（40）。 天线阵列由多个天线的天线组组成，并通过多个天线接收信号。 候选组设定单元确定用于信号检测的临时候选组的数量V. 信号检测单元包括第一和第二单元。 第一个单元首先检测V符号。 第二单元检测V检测行的M-1长度以检测V个候选组的最终M长度。 最终信号选择单元通过ML（最大似然）选择最接近于接收信号的信号行，以将该信号确定为最终检测信号。
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Patent Agency Ranking
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公开(公告)号：KR102063643B1
公开(公告)日：2020-01-08
申请号：KR1020190107494
申请日：2019-08-30
Applicant: 세종대학교산학협력단
IPC: H04B7/155 , H04B17/336 , G06N20/00
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