-
公开(公告)号：KR1020080079578A
公开(公告)日：2008-09-01
申请号：KR1020070118533
申请日：2007-11-20
CPC classification number: H04B7/0491 , H04L27/2608 , H04L27/2626
Abstract: A signal transmission method and a downlink frame generation method are provided to be capable of magnifying a time diversity gain within a TTI(Transmission Time Interval) of broadcasting channel information by applying a precoding vector switching diversity method to the broadcasting channel information, as efficiently removing interference. A channel encoder generates and outputs channel-encoded BCH(Broadcasting Channel) data(S201). An SCH(Synchronization Channel) symbol generator generates and outputs plural SCH symbols(S203). Plural other channel symbols are generated and outputted(S205). Precoding vectors are applied to BCH symbols to output the BCH symbols, while the SCH symbols and the other channel symbols are switched, then the switched symbols are outputted to the first and second transmitters(S207).
Abstract translation: 提供了一种信号传输方法和下行链路帧生成方法，其能够通过对广播信道信息应用预编码向量切换分集方法来放大广播信道信息的TTI（传输时间间隔）内的时间分集增益，作为有效地去除 干扰。 信道编码器生成并输出信道编码BCH（广播信道）数据（S201）。 SCH（同步信道）符号发生器产生并输出多个SCH符号（S203）。 生成并输出多个其他通道符号（S205）。 将预编码向量应用于BCH符号以输出BCH符号，同时切换SCH符号和其它信道符号，然后将切换的符号输出到第一和第二发射机（S207）。
-
公开(公告)号：KR1020080077899A
公开(公告)日：2008-08-26
申请号：KR1020070121320
申请日：2007-11-27
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0456 , H04L5/0007 , H04L27/2605
Abstract: A signal transmitting method and a signal receiving method are provided to demodulate broadcast channel information effectively when an MS(Mobile Station) is located at a sector boundary. A down-converter converts a received downlink signal into a baseband signal and outputs the same(S301). An SCH(Synchronization Channel) BCH(Broadcast Channel) band filter filters an SCH band signal and a BCH band signal from the baseband signal and outputs the same(S303). A cell searching unit checks a home sector and one or more target sectors through the SCH band signal(S305). A guard interval removing unit removes a guard interval such as a CP from the SCH band signal and the BCH band signal(S307). A Fourier transforming unit performs FFT(Fast Fourier Transform) on the guard interval-removed SCH band signal and BCH band signal to generate a plurality of SCH reception symbols and a plurality of BCH reception symbols transmitted in a plurality of subcarriers, and outputs the same(S309). A channel estimating unit checks whether there is a target sector which has been searched by the cell searching unit(S311). If the cell searching unit fails to acquire an ID of a target sector, the channel estimating unit estimates a channel state from the SCH reception symbols of a home sector(S313). A BCH demodulating unit estimates BCH symbols from the BCH reception symbols outputted from the Fourier transforming unit(S315). A BCH decoder performs decoding on the plurality of BCH symbols to generate BCH information(S321).
Abstract translation: 提供一种信号发送方法和信号接收方法，用于当MS（移动站）位于扇区边界时有效地解调广播信道信息。 下变频器将接收到的下行链路信号转换为基带信号并输出（S301）。 SCH（同步信道）BCH（广播信道）频带滤波器对来自基带信号的SCH频带信号和BCH频带信号进行滤波并输出（S303）。 小区搜索单元通过SCH频带信号检查归属扇区和一个或多个目标扇区（S305）。 保护间隔去除单元从SCH频带信号和BCH频带信号中去除诸如CP的保护间隔（S307）。 傅立叶变换单元对保护间隔去除的SCH频带信号和BCH频带信号执行FFT（快速傅立叶变换），以产生在多个子载波中发送的多个SCH接收符号和多个BCH接收符号，并输出 （S309）。 信道估计单元检查是否存在由小区搜索单元搜索的目标扇区（S311）。 如果小区搜索单元未能获取目标扇区的ID，则信道估计单元从家庭扇区的SCH接收符号估计信道状态（S313）。 BCH解调单元从从傅里叶变换单元输出的BCH接收符号估计BCH码元（S315）。 BCH解码器对多个BCH符号执行解码以产生BCH信息（S321）。
-
公开(公告)号：KR1020080073192A
公开(公告)日：2008-08-08
申请号：KR1020070080064
申请日：2007-08-09
CPC classification number: H04W52/245 , H04W52/42
Abstract: A random access preamble transmission method is provided to enable an MS(Mobile Station) to send a random access preamble by selecting one of antennas according to a downlink channel state, thereby reducing delay time occurring when the random access preamble is transmitted. An MS receives a BCH(Broadcasting Channel) signal periodically transmitted from a base station(S100). The MS measures received power for each of two antennas(S101). The MS determines an antenna having high received power as a random access preamble transmission antenna(S102). The MS determines received power of the MS(S103). The MS determines random access preamble transmission power by using an open loop power control method(S104). The MS transmits a random access preamble of the determined transmission power by using the determined transmission antenna(S105).
Abstract translation: 提供一种随机接入前同步码传输方法，使MS（移动台）能够根据下行链路信道状态选择一个天线来发送随机接入前同步码，从而减少发送随机接入前导码时发生的延迟时间。 MS接收从基站周期性发送的BCH（广播信道）信号（S100）。 MS测量两个天线中的每一个的接收功率（S101）。 MS确定具有高接收功率的天线作为随机接入前导码发射天线（S102）。 MS确定MS的接收功率（S103）。 MS通过使用开环功率控制方法来确定随机接入前导码发射功率（S104）。 MS通过使用所确定的发送天线来发送所确定的发送功率的随机接入前导码（S105）。
-
公开(公告)号：KR1020080049596A
公开(公告)日：2008-06-04
申请号：KR1020070074431
申请日：2007-07-25
CPC classification number: H04B7/2612 , H04W72/0413 , H04W74/006 , H04W74/0833
Abstract: A random access method and a random access response method are provided to enable an MS to select a downlink resource optimized to a downlink channel status and transmit information about the downlink resource to a BS(Base Station) when the MS attempts random access, thereby increasing the transfer rate of the random access response of the BS to improve the reliability of the random access response of the BS. A random access response method comprises the following steps of: transmitting a common pilot signal(S101); receiving the index of at least one downlink resource selected on the basis of the common pilot signal from an MS(Mobile Station)(S103); and transmitting a response to the random access of the MS by using the index of at least one downlink resource(S104).
Abstract translation: 提供了一种随机接入方法和随机接入响应方法，以使MS能够选择对下行链路信道状态优化的下行链路资源，并且当MS尝试随机接入时，向BS（基站）发送关于下行链路资源的信息，从而增加 BS的随机接入响应的传输速率，以提高BS的随机接入响应的可靠性。 随机接入响应方法包括以下步骤：发送公共导频信号（S101）; 基于来自MS（移动台）的公共导频信号，接收选择的至少一个下行链路资源的索引（S103）; 以及通过使用至少一个下行链路资源的索引来发送对所述MS的随机接入的响应（S104）。
-
公开(公告)号：KR100829505B1
公开(公告)日：2008-05-16
申请号：KR1020070010951
申请日：2007-02-02
Applicant: 한국전자통신연구원
IPC: H04B7/04
Abstract: 통신 시스템에서, 할당된 주파수 대역이 복수의 주파수 그룹으로 분할되고, 각 주파수 그룹에 복수의 프리코딩 행렬 중 일부 프리코딩 행렬이 할당되거나 복수의 송신 안테나 중 일부 송신 안테나가 할당되어 있다. 그리고 단말은 복수의 주파수 그룹 중에서 채널 특성이 좋은 주파수 그룹에 대한 정보를 기지국으로 피드백하고, 기지국은 단말로부터 피드백된 주파수 그룹과 해당 주파수 그룹에 할당된 프리코딩 행렬 또는 송신 안테나를 이용하여 신호를 송신한다.
주파수, 그룹, 피드백, 빔형성, MIMO, 프리코딩 행렬-
Patent Agency Ranking
公开(公告)号：KR1020080039780A
公开(公告)日：2008-05-07
申请号：KR1020070078967
申请日：2007-08-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2626 , H04B7/0456 , H04L1/0668 , H04L5/225 , H04L25/497 , H04L27/2695
Abstract: A method and an apparatus for transmitting SCH(Synchronous CHannel) signals and BCH(Broadcast CHannel) signals in a mobile communication system are provided to improve the performance of channel estimation and to increase the efficiency of broadcast channel demodulation by transmitting a plurality of SCH preambles and a plurality of BCH signals through respectively different beams. An SCH preamble and BCH multiplexer multiplexes two SCH preambles and two BCH signals(S310). A precoding vector multiplexer selects precoding vectors to be used for precoding(S320). A precoder executes precoding by multiplying the preambles and the BCH signals by the selected precoding vectors(S330). An IFFT(Inverse Fast Fourier Transformer) converts the precoded SCH preambles in time-domain Tx signals through inverse fast fourier transformation(S340). An RF(Radio Frequency) transmitter converts the analog Tx signals into RF signals and transmits them through an antenna(S350).
Abstract translation: 提供一种用于在移动通信系统中发送SCH（同步信道）信号和BCH（广播信道）信号的方法和装置，以提高信道估计的性能，并通过发送多个SCH前导码来提高广播信道解调的效率 和多个BCH信号分别通过不同的光束。 SCH前导码和BCH复用器复用两个SCH前导码和两个BCH信号（S310）。 预编码矢量复用器选择要用于预编码的预编码矢量（S320）。 预编码器通过将前同步码和BCH信号乘以所选择的预编码矢量来执行预编码（S330）。 IFFT（快速傅里叶逆变换器）通过反向快速傅立叶变换将时域Tx信号中的预编码的SCH前导码转换（S340）。 RF（射频）发射器将模拟Tx信号转换成RF信号并通过天线发送它们（S350）。
-
公开(公告)号：KR1020080023163A
公开(公告)日：2008-03-12
申请号：KR1020070090476
申请日：2007-09-06
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2601 , H04B7/02 , H04B7/155 , H04L25/0202 , H04L25/03866
Abstract: A method for transmitting signals, a method for creating a downlink frame, and a method for receiving signals are provided to improve a decoding performance by coherently decoding a broadcasting channel through presuming a channel by using a synchronization channel. A method for transmitting signals includes a step of applying a plurality of precoding vectors to a plurality of synchronous channel symbols. The precoding vector equal to the synchronous channel symbol is applied to a broadcasting channel symbol adjacent at the synchronous channel symbol. One frame has a plurality of sub-frames. The precoding vector has a different value according to each sub-frame. The precoding vector has a different value according to each sector. A precoding vector group has the precoding vectors. The precoding vector is applied with a different sequence in each sector of the sub-frames. The precoding vector is applied with a different sequence according to a cell.
Abstract translation: 提供一种用于发送信号的方法，一种用于创建下行链路帧的方法和一种用于接收信号的方法，用于通过使用同步信道预测信道来对广播信道进行相干解码来提高解码性能。 用于发送信号的方法包括将多个预编码向量应用于多个同步信道符号的步骤。 等同于同步信道符号的预编码向量被应用于在同步信道符号附近的广播信道符号。 一帧具有多个子帧。 根据每个子帧，预编码向量具有不同的值。 预编码向量根据每个扇区具有不同的值。 预编码向量组具有预编码向量。 在子帧的每个扇区中以不同的顺序应用预编码向量。 预编码向量根据小区应用不同的序列。
-
公开(公告)号：KR100801284B1
公开(公告)日：2008-02-04
申请号：KR1020060086983
申请日：2006-09-08
Applicant: 한국전자통신연구원
Abstract: 직교 주파수 분할 다중(orthogonal frequency division multiplexing, OFDM) 방식 기반의 셀룰러 시스템의 이동국이 수신된 신호로부터 데이터를 복원하는 방법을 제공한다. 이동국은 수신 신호를 푸리에 변환, 등화하고, 수신 신호에 포함된 상기 이동국과 무선 접속된 셀 내의 페이딩으로 인한 간섭 성분 - 자기셀 페이딩 성분 - 과 인접 셀의 페이딩으로 인한 간섭 성분 - 타셀 페이딩 성분 - 이 포함된 채널 계수를 검출한다. 그리고 이동국은 수신 신호에 포함된 잡음 성분을 검출하여, 등화된 수신 시호, 채널 계수와 상기 수신 신호에 포함된 잡음 성분을 이용하여 로그 가능도비를 계산한 후 연판정을 수행하여 수신된 신호를 결정한다.
OFDM, 간섭, 로그 가능도비Abstract translation: 提供了一种用于基于正交频分复用（OFDM）从蜂窝系统的移动站中的接收信号中恢复数据的方法。 移动站接收的信号进行傅立叶变换，均衡，并且由于在小区接入干扰分量磁性细胞衰落的衰落分量包括在接收的信号和无线电成本的移动站 - 和相邻由于在小区干扰分量-tasel衰落分量衰落 - 并检测包含的频道系数。 通过检测包含在接收信号中的噪声分量，则确定使用包括在接收到的信号中的噪声分量的一个和所述均衡的接收志保，信道系数通过执行软判决信号计算接收后对数似然比的移动站 的。
-
公开(公告)号：KR1020070121583A
公开(公告)日：2007-12-27
申请号：KR1020070061198
申请日：2007-06-21
Applicant: 한국전자통신연구원
CPC classification number: H04L25/0204 , H04L1/0071 , H04L1/06 , H04L5/0023 , H04L5/0037 , H04L5/005 , H04L5/0082 , H04L5/0092 , H04L25/0228 , H04L25/03828 , H04L27/2613 , H04L27/2655 , H04L2001/0093 , H04L5/0083
Abstract: Signal transmitting and receiving methods are provided to improve the receiving quality by reducing the block error rate of SCH(Synchronization Channel) and BCH(Broadcasting Channel) information and to decrease complexity of a mobile station as the mobile station needs not to perform blind detection for the number of transmitting antennas of a sector transmitter. A signal transmitting method is composed of steps of mapping plural SCH symbols and plural BCH symbols to the adjacent down-link frame; transmitting the down-link frame; allocating a first antenna to each SCH symbol; and allocating the first antenna to the BCH symbols adjacent to each SCH symbol. A step of mapping the symbols to the down-link frame comprises steps of allocating a first bandwidth to plural SCH symbols and allocating the first bandwidth to plural BCH symbols.
Abstract translation: 提供信号发送和接收方法，以通过减少SCH（同步信道）和BCH（广播信道）信息的块错误率来提高接收质量，并且随着移动台不需要执行盲检测，降低移动台的复杂度 扇区发射机的发射天线的数量。 信号发送方法包括将多个SCH符号和多个BCH符号映射到相邻的下行链路帧的步骤; 发送下行链路帧; 向每个SCH符号分配第一天线; 以及将第一天线分配给与每个SCH符号相邻的BCH符号。 将符号映射到下行链路帧的步骤包括以下步骤：将第一带宽分配给多个SCH符号，并将第一带宽分配给多个BCH符号。
-
70.发明授权ＯＦＤＭ 셀룰러 시스템에서의 셀 탐색 방법, 순방향 링크프레임 전송 방법 및 이를 이용하는 장치 및 순방향 링크프레임 구조 失效小区搜索方法，前向链路帧传输方法，使用相同和前向链路帧结构的装置
公开(公告)号：KR100779092B1
公开(公告)日：2007-11-27
申请号：KR1020060074309
申请日：2006-08-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2656 , H04J11/0069 , H04L5/0016 , H04L5/005 , H04L27/2613 , H04L27/2675
Abstract: OFDM 셀룰러 시스템에서의 셀 탐색 방법, 순방향 링크 프레임 전송 방법, 이를 이용하는 장치 및 순방향 링크 프레임 구조가 개시된다. 이 셀 탐색 장치는 각 셀로부터, 인접하는 동기 채널 심볼 간의 간격이 서로 다른 동기 채널 심볼을 복수 개 포함하는 순방향 링크 프레임에 따른 신호를 수신하고, 상기 수신신호의 동기 채널을 이용하여, 동기채널 심볼의 동기를 획득하는 동기 획득부; 및 상기 획득된 동기를 기초로, 상기 동기 채널 심볼 간의 간격 패턴을 이용하여 프레임 경계를 검출하는 경계 검출부를 포함한다. 본 발명에 따르면, 낮은 복잡도로 셀 탐색 시간을 줄일 수 있다.
-
-
-
-
-
-
-
-
-
Search Results
208
records
(took 0.031 seconds)
