公开(公告)号：US07411894B2

公开(公告)日：2008-08-12

申请号：US10666514

申请日：2003-09-18

申请人： Jung-Min Ro ,  Jingyl Liao ,  Hai Wang ,  Yongchun Chen ,  Fengming Cao ,  Pan-Yuh Joo ,  Dong-Seek Park

发明人： Jung-Min Ro ,  Jingyl Liao ,  Hai Wang ,  Yongchun Chen ,  Fengming Cao ,  Pan-Yuh Joo ,  Dong-Seek Park

IPC分类号： H04J11/00 ,  H04J3/00 ,  H04J1/00

CPC分类号： H04L27/2607

摘要： A transceiver system and method in an OFDM communication system which enables exact symbol synchronization acquisition and improves performance for frequency offset and channel estimation. In the apparatus, a guard interval filling unit copies data at a predetermined interval in an input data row inputted to be transmitted, and fills in the copied data in the preset guard interval in the input data row. A selection unit selectively receives an output data row outputted from the guard interval filling means and unique words having a constant amplitude and a non-periodic auto-correlation characteristic, and outputs the OFDM symbol in which the unique words are inserted in the output data row.

摘要翻译： OFDM通信系统中的收发机系统和方法，其能够精确地进行符号同步采集并提高频偏和信道估计的性能。 在该装置中，保护间隔填充单元以预定的时间间隔复制输入的要输出的输入数据列中的数据，并在输入数据行中以预设的保护间隔填充复制的数据。 选择单元选择性地接收从保护间隔填充装置输出的输出数据行和具有恒定幅度和非周期性自相关特性的唯一字，并将其中插入有唯一字的OFDM符号输出到输出数据行 。

公开(公告)号：US20090010229A1

公开(公告)日：2009-01-08

申请号：US12158962

申请日：2005-12-22

申请人： Muhammad Kazmi ,  Jingyl Liao

发明人： Muhammad Kazmi ,  Jingyl Liao

IPC分类号： H04J3/00

CPC分类号： H04W52/243 ,  H04W52/06 ,  H04W52/346

摘要： The invention relates to a method of globally balancing the transmit power in a cellular radio system with tight reuse of frequencies, to a central controller node, and to an access point that in combination with conventional power control schemes balances the downlink transmission power on reused frequencies in order to balance co-channel interference in a multi-cell environment. The power balancing scheme dynamically assigns a token to or takes a token away from an individual reused radio channel based on quality of, or based on transmission power in the channel. A token, if taken away from the channel, inhibits conventional power control thereby freezing the transmission power in the channel on its current power level. A token, if assigned or re-assigned to channel, re-assumes conventional power control thereby allowing dynamic variation of the transmission power in the channel in accordance with the conventional power control.

摘要翻译： 本发明涉及一种全球平衡蜂窝无线电系统中的发射功率与频率的紧密重用，中央控制器节点以及接入点的方法，该接入点结合常规的功率控制方案，将重新使用的频率上的下行链路传输功率平衡 以平衡多小区环境中的同信道干扰。 功率平衡方案基于质量或基于信道中的传输功率动态地将令牌分配给令牌或从令牌远离个体重用无线电信道。 令牌，如果从通道中取走，则禁止传统的功率控制，从而冻结通道当前功率水平的发射功率。 令牌，如果被分配或重新分配给信道，则重新采用传统的功率控制，从而允许根据常规功率控制在信道中的发射功率的动态变化。