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：US20060122314A1

公开(公告)日：2006-06-08

申请号：US11035885

申请日：2005-01-18

申请人： Limin Wu ,  Shuxue Zhou ,  Yongchun Chen ,  Bo You ,  Guangxin Gu

发明人： Limin Wu ,  Shuxue Zhou ,  Yongchun Chen ,  Bo You ,  Guangxin Gu

IPC分类号： B60C1/00

CPC分类号： C08G63/672 ,  C08G18/4211 ,  C08K3/36 ,  C09D175/06 ,  C08L2666/54

摘要： A high solid polyester polyol/silica nanocomposite resin with low viscosity is synthesized by an in situ polymerization method, namely conducting condensation polymerization of polyol/diacid monomer with a molar ratio of 1.1˜1.5 in the presence of colloidal silica nanoparticles with a diameter of 10˜150 nm. The resulted nanocomposite resins has a solid content of >95%, molecular weight of 1000˜5000 g/mol and hydroxyl value of 80-200 mg KOH/g, and a viscosity in the range of 800-2000 mPa.s. The viscosities are especially lower than those obtained by a blending method. The nanosilica content in the nanocomposite resin is 1˜15% (based on the total solid content of nanocomposite resin). The high solid polyester polyol/silica nanocomposite resin was curable with isocyanate or melamine to prepare high solid transparent nanocomposite coatings with obviously improved abrasion and scratch resistance, hardness, weatherability etc.

公开(公告)号：US07476707B2

公开(公告)日：2009-01-13

申请号：US11035885

申请日：2005-01-18

申请人： Limin Wu ,  Shuxue Zhou ,  Yongchun Chen ,  Bo You ,  Guangxin Gu

发明人： Limin Wu ,  Shuxue Zhou ,  Yongchun Chen ,  Bo You ,  Guangxin Gu

IPC分类号： C08G63/02

CPC分类号： C08G63/672 ,  C08G18/4211 ,  C08K3/36 ,  C09D175/06 ,  C08L2666/54

摘要： A high solid polyester polyol/silica nanocomposite resin with low viscosity is synthesized by an in situ polymerization method, namely conducting condensation polymerization of polyol/diacid monomer with a molar ratio of 1.1˜1.5 in the presence of colloidal silica nanoparticles with a diameter of 10˜150 nm. The resulted nanocomposite resins has a solid content of >95%, molecular weight of 1000˜5000 g/mol and hydroxyl value of 80-200 mg KOH/g, and a viscosity in the range of 800-2000 mPa.s. The viscosities are especially lower than those obtained by a blending method. The nanosilica content in the nanocomposite resin is 1˜15% (based on the total solid content of nanocomposite resin). The high solid polyester polyol/silica nanocomposite resin was curable with isocyanate or melamine to prepare high solid transparent nanocomposite coatings with obviously improved abrasion and scratch resistance, hardness, weatherability etc.

摘要翻译： 通过原位聚合法合成具有低粘度的高固体聚酯多元醇/二氧化硅纳米复合材料树脂，即在直径为10的胶体二氧化硅纳米颗粒存在下摩尔比为1.1〜1.5的多元醇/二酸单体的导电缩聚 〜150nm。 所得纳米复合树脂的固体含量> 95％，分子量为1000〜5000g / mol，羟值为80-200mg KOH / g，粘度为800-2000mPa.s。 粘度特别低于通过混合方法获得的粘度。 纳米复合树脂的纳米二氧化硅含量为1〜15％（以纳米复合树脂的总固体含量计）。 高固体聚酯多元醇/二氧化硅纳米复合材料树脂可用异氰酸酯或三聚氰胺固化，以制备高固体透明纳米复合材料涂层，显着提高耐磨性和耐刮擦性，硬度，耐候性等。