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    • 71. 发明公开
    • OFDM 셀 탐색 및 BCH 복조 방법
    • 用于OFDM系统的小区搜索和BCH解调方法
    • KR1020080035992A
    • 2008-04-24
    • KR1020070105751
    • 2007-10-19
    • 한국전자통신연구원삼성전자주식회사
    • 김일규박형근장갑석고영조이효석이준환김영훈방승찬황승구
    • H04B7/26H04L27/26
    • H04J11/0069H04B7/2643H04L27/2662H04L27/2678
    • Cell search and BCH(Broadcasting Channel) demodulation methods for an OFDM(Orthogonal Frequency Division Multiplexing) system are provided to obtain the synchronization with low complexity and to offer a simple receiver structure without blind detection due to time ambiguity. A terminal obtains a sync block synchronization and the first sync channel sequence number by the first sync channel symbol included in the received frame(S1200). The boundary and scrambling code group is detected by the sync block synchronization and the second sync channel symbol included in the frame received by the terminal(S1210). A process for obtaining the scrambling code is performed by the first sync channel sequence number and the scrambling code group(S1220). A BCH included in the frame received by the terminal is modulated by the scrambling code so that the information of the wireless communication system is obtained. In the boundary and scrambling code group detection process, the number of BCH antennas or the length of CP(Cyclic Prefix) are obtained.
    • 提供用于OFDM(正交频分复用)系统的小区搜索和BCH(广播信道)解调方法以获得低复杂度的同步,并且由于时间模糊性而提供简单的接收机结构而不会盲目检测。 终端通过接收到的帧中包括的第一同步信道符号获得同步块同步和第一同步信道序列号(S1200)。 通过由终端接收的帧中包含的同步块同步和第二同步信道符号来检测边界和扰码组(S1210)。 通过第一同步信道序列号和扰码组来执行用于获得扰码的处理(S1220)。 由终端接收的帧中包括的BCH被扰频调制,从而获得无线通信系统的信息。 在边界和扰码组检测过程中,获得BCH天线的数量或CP的长度(循环前缀)。
    • 72. 发明公开
    • 셀 간 이종 주파수 호핑을 이용한 랜덤 액세스 방법 및이를 수행하는 이동 통신 장치
    • 使用相邻细胞和移动通信设备之间的不同频率狩猎模式的随机访问方法
    • KR1020080012151A
    • 2008-02-11
    • KR1020070072450
    • 2007-07-19
    • 한국전자통신연구원삼성전자주식회사
    • 이효석김일규박형근고영조장갑석김영훈방승찬
    • H04W74/08H04J11/00
    • H04B7/0604H04W74/0833H04L27/2636H04W48/08
    • A random access method using heterogeneous frequency hopping patterns between cells and a mobile communication device for performing the method are provided to use hopping patterns when an RACH(Random Access Channel) of an MS(Mobile Station) is transmitted, thereby preventing collision of random access bursts between neighboring cells as obtaining a diversity gain in a frequency domain. A receiver(220) receives RACH information on a cell group to which an MS(200) belongs from a base station. A channel allocator(230) allocates channels to RACH bursts based on the RACH information. A transmitter(260) transmits the RACH bursts by the allocated channels. The allocator(230) comprises as follows. A controller(240) extracts random access hopping patterns set in the cell group from the transmitted burst information, and selects sub channels to which the bursts are to be transmitted according to the extracted patterns. An OFDMA(Orthogonal Frequency Division Multiple Access) modulator(250) allocates the sub channels to the bursts, and OFDMA-modulates the bursts.
    • 提供了一种在小区之间使用异构跳频模式的随机接入方法和用于执行该方法的移动通信设备,以便在发送MS(移动台)的RACH(随机接入信道)时,使用跳频模式,从而防止随机接入的冲突 在相邻小区之间突发,以获得频域中的分集增益。 接收机(220)从基站接收关于MS(200)所属的小区组的RACH信息。 信道分配器(230)基于RACH信息将信道分配给RACH突发。 发射机(260)通过所分配的信道发送RACH脉冲串。 分配器(230)包括如下。 控制器(240)从发送的脉冲串信息中提取在单元组中设置的随机接入跳变模式,并且根据提取的模式选择要发送脉冲串的子信道。 OFDMA(正交频分多址)调制器(250)将子信道分配给脉冲串,并且OFDMA调制脉冲串。