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公开(公告)号：KR100895101B1
公开(公告)日：2009-04-28
申请号：KR1020070081612
申请日：2007-08-14
Applicant: 한국전자통신연구원
Abstract: 본 발명은 OFDM 셀룰러 시스템에서의 동기 채널의 전송 방법 및 장치에 관한 것으로, 복수의 주 동기 채널 신호와 부 동기 채널 신호를 포함하는 동기 채널 신호를 다중화하고 상기 동기 채널 신호를 프리코딩할 때 사용할 프리코딩 벡터를 선택한 후, 상기 동기 채널 신호와 상기 프리코딩 벡터를 곱한다.
동기 채널 전송, OFDM 셀룰러 시스템, 빔형성-
32.发明授权
公开(公告)号：KR100889754B1
公开(公告)日：2009-03-24
申请号：KR1020070089928
申请日：2007-09-05
Abstract: 본 발명은 ＯＦＤＭ 셀룰러 시스템에서의 셀 고유번호 개수 증가에 적합한 동기신호 전송방법 및 동기채널 프레임 구조에 관한 것으로, 무선통신 시스템에서의 순방향 동기신호 전송방법에 있어서, 복수 개의 심볼로 구성되는 프레임을 생성하는 단계와 상기 프레임을 순방향 링크를 통해 전송하는 단계를 포함하고, 상기 프레임은 동일한 시간의 심볼 내의 주파수에 따라 구분된 주동기채널(P-SCH) 및 부동기채널(S-SCH)을 포함하며, 상기 주동기채널과 상기 부동기채널을 이용하여 검출된 코드번호의 패턴에 의해 셀 식별자를 특정하는 것을 특징으로 하며, 일정 시간 범위에서 부동기채널 신호의 반복 패턴이 증가하게 함으로써 단말기의 주파수 오차 추정 성능을 향상시키는 효과가 있다.
주동기채널(P-SCH), 부동기채널(S-SCH), 동기신호, 순방향 링크 프레임-
公开(公告)号：KR100885476B1
公开(公告)日：2009-02-24
申请号：KR1020070042760
申请日：2007-05-02
Abstract: 본 발명은 직교 주파수 분할 다중 접속(Orthogonal Frequency Division Multiple Access: 이하, OFDMA) 시스템에서의 하향링크 스케줄링 정보 송/수신 방법 및 장치에 관한 것으로, 이 송신 방법은 OFDMA 시스템의 하향 링크 자원으로 구성된 자원블록들 중에서, 적어도 하나의 자원블록을 각 단말에 할당하는 할당단계; 상기 각 단말에 대해, 상기 할당된 자원블록 중에서 소정의 조건에 따라 자원블록을 선택하는 선택단계; 상기 각 단말에 대해, 상기 단말의 자원할당정보 및 상기 단말을 식별하기 위한 식별정보를 포함하는 스케줄링 정보를 생성하는 생성단계; 및 상기 각 단말에 대해, 선택된 자원블록을 이용하여 상기 단말의 스케줄링 정보를 전송하는 전송단계를 포함한다. 본 발명에 따르면, 스케줄링의 자유도를 줄이지 않으면서 스케줄링 정보의 전송에 사용되는 하향 링크 자원의 량을 줄일 수 있다.
OFDM, OFDMA, 하향링크 제어정보, 스케줄링 정보, 자원할당 정보, 개별적 코딩, 그룹별 코딩, 비트맵-
公开(公告)号：KR100884382B1
公开(公告)日：2009-02-17
申请号：KR1020070073319
申请日：2007-07-23
Abstract: 프리앰블 생성 장치는 주파수 영역에서 시퀀스를 생성하고, 시퀀스를 푸리에 역변환하여 시간 영역에서 푸리에 역변환 신호를 생성하며, 푸리에 역변환 신호를 인터폴레이션하여 프리앰블을 생성한다. 이를 통해 큰 크기의 DFT/IDFT를 사용하지 않고 프리앰블을 생성할 수 있다.
프리앰블, 채널, 응답-
公开(公告)号：KR1020090009703A
公开(公告)日：2009-01-23
申请号：KR1020080063387
申请日：2008-07-01
Applicant: 한국전자통신연구원
CPC classification number: H04W48/16 , H04B1/70735 , H04B7/2656 , H04J11/0069 , H04L7/043 , H04L27/2613 , H04L27/2655 , H04W56/00 , H04W72/042 , H04W72/0446 , H04W88/08
Abstract: A method for generating a downlink frame and a method for searching a cell are provided to improve efficiency of searching the cell by receiving the downlink frame and to level interference between sectors by scrambling a short sequence to a scrambling sequence. A first shot sequence and a second short sequence indicating the cell group information are generated. A first scrambling sequence and a second scrambling sequence decided by a first synchronization sequence are generated(S510). A third scrambling sequence determined by the first shot sequence is generated. The first shot sequence is scrambled to the first scrambling sequence. The second short sequence is scrambled to the second scrambling sequence and the third scrambling sequence(S520). A second synchronization signal including the scrambled first shot sequence and the scrambled second short sequence is mapped in the frequency domain(S530). An OFDM transmission unit receives the frame of the downlink signal and transmits the frame through the transmission antenna(S540).
Abstract translation: 提供了一种用于生成下行链路帧的方法和用于搜索小区的方法，以通过接收下行链路帧来提高搜索小区的效率，并通过将短序列加扰到加扰序列来对扇区之间的干扰进行等级化。 产生指示单元组信息的第一次序列和第二个短序列。 产生由第一同步序列决定的第一加扰序列和第二加扰序列（S510）。 产生由第一拍摄序列确定的第三加扰序列。 第一个播放序列被加扰到第一个加扰序列。 将第二短序列加扰到第二加扰序列和第三加扰序列（S520）。 在频域中映射包括加扰的第一拍摄序列和加扰的第二短片段的第二同步信号（S530）。 OFDM发送单元接收下行链路信号的帧，并通过发送天线发送帧（S540）。
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Patent Agency Ranking
公开(公告)号：KR1020090009102A
公开(公告)日：2009-01-22
申请号：KR1020080056236
申请日：2008-06-16
CPC classification number: H04J11/0069 , H04J11/0076 , H04J13/16 , H04L5/0007 , H04L5/0053 , H04L27/26 , H04L27/261 , H04W48/16 , H04L25/03866
Abstract: A method for generating a downlink frame and a method for searching a cell are provided to improve cell searching performance by reducing interference between sectors by scrambling two sequences with different scrambling codes. A sequence generator generates a plurality of sequences, and a plurality of scrambling sequences and transmits the sequences to the synchronization signal generator(S410). A synchronization signal generator generates a second synchronization signal by using the plurality of sequences received from the sequence generator, and the plurality of scrambling sequences(S420). A frequency mapping device maps the data to be transmitted by using the synchronization signal generated in the synchronization signal generator and transmission traffic data as the time and frequency domains and generates the frame of the downlink signal(S430). The OFDM transmitter receives the frame of the downlink signal and transmits the frame through a transmission antenna(S440).
Abstract translation: 提供一种用于生成下行链路帧的方法和用于搜索小区的方法，以通过利用不同扰码对两个序列进行扰频来减少扇区之间的干扰来提高小区搜索性能。 序列生成器生成多个序列和多个加扰序列，并将序列发送到同步信号发生器（S410）。 同步信号发生器通过使用从序列发生器接收的多个序列和多个加扰序列来产生第二同步信号（S420）。 频率映射设备通过使用在同步信号发生器中生成的同步信号和传输业务数据作为时间和频域来映射要发送的数据，并生成下行链路信号的帧（S430）。 OFDM发射机接收下行链路信号的帧，并通过发送天线发送帧（S440）。
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公开(公告)号：KR1020080110555A
公开(公告)日：2008-12-18
申请号：KR1020080056568
申请日：2008-06-16
IPC: H04J11/00
CPC classification number: H04L5/0016 , H04J13/0074 , H04L5/0017 , H04L5/0019 , H04L5/0021 , H04L5/0037 , H04L5/0048 , H04L5/0053 , H04L5/0055 , H04J11/0023 , H04L1/12
Abstract: A method for transmitting signal in wireless communication system using time and frequency domain at the same time is provided to efficiently reduce interference between cells by using a code hopping method. A method for transmitting signal in wireless communication system using time and frequency domain at the same time comprises the following steps: a step for assigning an identical frequency domain discrimination sequence and a unlike time domain discrimination sequence into a plurality of terminals by a resource index according to the first slot in a first slot; and a step for assigning a unlike frequency domain discrimination sequence and a unlike time domain discrimination sequence into a plurality of terminals by a resource index according to the second slot in a second slot.
Abstract translation: 提供了一种在同时使用时域和频域的无线通信系统中发送信号的方法，以通过使用跳频方法来有效降低小区之间的干扰。 同时使用时域和频域在无线通信系统中发送信号的方法包括以下步骤：通过资源索引将相同的频域鉴别序列和不同的时域鉴别序列分配给多个终端的步骤 到第一槽中的第一槽; 以及通过第二时隙中的第二时隙的资源索引，将不同的频域判别序列和不同的时域判别序列分配给多个终端的步骤。
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公开(公告)号：KR1020080110176A
公开(公告)日：2008-12-18
申请号：KR1020070058589
申请日：2007-06-14
CPC classification number: H04L1/1812 , H04B7/0452 , H04L1/1621 , H04L5/0055 , H04L27/26
Abstract: A method for transmitting ACK/NACK though frequency division multiplexing for transmitting ACK/NACK bit is provided to improve efficiency of down link wireless resource by suggesting an efficient ACK/NACK channel transmitting method. A method for transmitting ACK/NACK though frequency division multiplexing for transmitting ACK/NACK bit supports HARQ(Hybrid Automatic Repeat request) in a wireless communications system supporting multi-user MIMO(Multi Input Multi Output). Mobile stations using an identical upward link resource performs a frequency division multiplexing. Mobile stations using a different upward link each other transmits ACK(ACKnowledgement)/NACK(Negative ACKnowledgement) multiplexed by a code division multiplexing or a frequency division multiplexing.
Abstract translation: 提供了一种通过用于发送ACK / NACK比特的频分复用来发送ACK / NACK的方法，通过提出有效的ACK / NACK信道发送方法来提高下行链路无线资源的效率。 通过用于发送ACK / NACK比特的频分复用来发送ACK / NACK的方法在支持多用户MIMO（多输入多输出）的无线通信系统中支持HARQ（混合自动重传请求）。 使用相同上行链路资源的移动台进行频分复用。 使用彼此不同的向上链路的移动站彼此发送通过码分复用或频分复用复用的ACK（确认）/ NACK（否定确认）。
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公开(公告)号：KR100874011B1
公开(公告)日：2008-12-17
申请号：KR1020070033617
申请日：2007-04-05
Applicant: 한국전자통신연구원
Abstract: An apparatus and a method for compensating the frequency offset in a wireless communication system are provided to perform the frequency offset compensation easily as having good performance, by having one compensation coefficient per sub carrier in a frequency domain. According to an apparatus for compensating frequency offset in a wireless communication system, a Fast Fourier Transform part(130) transforms a time domain signal into a frequency domain signal through FFT(Fast Fourier Transform). A frequency offset and channel estimation part(140) extracts a reference signal from the frequency domain signal, and then generates a frequency offset compensation coefficient and estimates a channel. A channel equalizing part(150) compensates frequency offset and performs channel equalization on the basis of the frequency offset compensation coefficient and the channel estimation result of the channel estimation part.
Abstract translation: 提供了一种用于补偿无线通信系统中的频率偏移的设备和方法，以便通过在频域中具有每个子载波一个补偿系数而容易地执行频率偏移补偿以具有良好的性能。 根据用于补偿无线通信系统中的频率偏移的设备，快速傅立叶变换部分（130）通过FFT（快速傅立叶变换）将时域信号变换为频域信号。 频率偏移和信道估计部分（140）从频域信号中提取参考信号，然后生成频率偏移补偿系数并估计信道。 信道均衡部分（150）补偿频率偏移，并且基于频率偏移补偿系数和信道估计部分的信道估计结果来执行信道均衡。
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公开(公告)号：KR100874003B1
公开(公告)日：2008-12-17
申请号：KR1020070072179
申请日：2007-07-19
Applicant: 한국전자통신연구원
Abstract: A method and an apparatus for transmitting a downlink pilot signal in a mobile communication system are provided to enable a BS(Base Station) to change a scrambling code allocated to each sector and change an interference sector in each sub frame and randomize interference between the sectors, thereby preventing the continuous deterioration of channel estimation capability generated by the multiple path of the interference sector. A method for transmitting a downlink pilot signal in a mobile communication system comprises the following steps of: generating and transmitting a first downlink pilot signal corresponding to a first sector; generating and transmitting a second downlink pilot signal which corresponds to a second sector and is different from the first downlink pilot signal; and differently generating the first downlink pilot signal and the second downlink pilot signal in each sub frame.
Abstract translation: 提供了一种用于在移动通信系统中发送下行链路导频信号的方法和设备，以使得BS（基站）能够改变分配给每个扇区的扰码并且改变每个子帧中的干扰扇区并随机化扇区之间的干扰 从而防止了由干扰扇区的多路径产生的信道估计能力的持续恶化。 一种在移动通信系统中发送下行导频信号的方法，包括以下步骤：生成并发送对应于第一扇区的第一下行导频信号; 生成并发送对应于第二扇区并且与所述第一下行导频信号不同的第二下行导频信号; 并在每个子帧中不同地生成第一下行导频信号和第二下行导频信号。
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