公开(公告)号：US20090262842A1

公开(公告)日：2009-10-22

申请号：US12105300

申请日：2008-04-18

申请人： Yongru Gu ,  Jun Ma

发明人： Yongru Gu ,  Jun Ma

IPC分类号： H04L27/28

CPC分类号： H04L27/2662 ,  H04L27/2676 ,  H04L27/2695

摘要： Identifying a trigger point of at least one OFDM decoder includes correlating a first time-domain sample of the at least one OFDM symbol with a second time-domain sample of the at least one OFDM symbol, processing the first time-domain sample and the second time-domain sample in the first moving average filter to determine a channel impulse response, comparing at least one correlation value of a first biggest path in the channel impulse response and a second biggest path in the channel impulse response, and determining a channel length of the channel impulse response based on a time duration of the channel impulse response. The OFDM decoder includes a first moving average filter and a second moving average filter.

摘要翻译： 识别至少一个OFDM解码器的触发点包括将至少一个OFDM符号的第一时域样本与至少一个OFDM符号的第二时域样本进行相关，处理第一时域样本和第二时域采样 在第一移动平均滤波器中的时域采样以确定信道脉冲响应，将信道脉冲响应中的第一最大路径的至少一个相关值与信道脉冲响应中的第二最大路径进行比较，以及确定信道脉冲响应的信道长度 基于信道脉冲响应的持续时间的信道脉冲响应。 OFDM解码器包括第一移动平均滤波器和第二移动平均滤波器。

公开(公告)号：US07599441B2

公开(公告)日：2009-10-06

申请号：US11471187

申请日：2006-06-20

申请人： Jun Ma ,  Nabil Yousef

发明人： Jun Ma ,  Nabil Yousef

IPC分类号： H04L5/12 ,  H04L23/02 ,  H04L27/06

CPC分类号： H04L25/067 ,  H04L1/0041 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/0071 ,  H04L27/34 ,  H04L27/38

摘要： A DVB-H bit-interleave coded modulation/demodulation system and method includes a convolutional encoder; an interleaver operatively connected to the convolutional encoder; a quadrature amplitude modulation (QAM) mapper operatively connected to the interleaver; a channel component operatively connected to the QAM mapper; a QAM demapper operatively connected to the channel component; a de-interleaver operatively connected to the QAM demapper; and a Viterbi decoder operatively connected to the de-interleaver. Preferably, the interleaver comprises a bit-wise interleaver and a symbol-wise interleaver operatively connected to the bit-wise interleaver. Preferably, the de-interleaver comprises a bit-wise de-interleaver; and a symbol-wise de-interleaver operatively connected to the bit-wise de-interleaver. The de-interleaver may be adapted to decode a soft decision metric for any of a QPSK, 16QAM, and 64QAM modulation. The de-interleaver may be adapted to decode a soft decision metric computation comprising a log-likelihood ratio soft decision metric of a binary bit stream of a signal.

摘要翻译： DVB-H位交织编码调制/解调系统和方法包括卷积编码器; 可操作地连接到卷积编码器的交织器; 可操作地连接到交织器的正交幅度调制（QAM）映射器; 可操作地连接到QAM映射器的信道分量; 可操作地连接到信道分量的QAM解映射器; 可操作地连接到QAM解映射器的解交织器; 以及可操作地连接到解交织器的维特比解码器。 优选地，交织器包括可操作地连接到逐位交织器的逐位交织器和符号方式的交织器。 优选地，解交织器包括位逐去交织器; 以及可操作地连接到逐位解交织器的符号式解交织器。 解交织器可以适于解码用于QPSK，16QAM和64QAM调制中的任何一个的软判决度量。 解交织器可以适于解码包括信号的二进制比特流的对数似然比软判决度量的软判决度量计算。

公开(公告)号：US07578989B2

公开(公告)日：2009-08-25

申请号：US11743634

申请日：2007-05-02

申请人： David Moy ,  Chunming Niu ,  Jun Ma ,  Jason M. Willey

发明人： David Moy ,  Chunming Niu ,  Jun Ma ,  Jason M. Willey

IPC分类号： C01B31/34

CPC分类号： B82Y30/00 ,  B01J21/18 ,  B01J27/22 ,  B01J35/023 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/168 ,  C01B32/18 ,  C01B32/907 ,  C01B32/949 ,  C01B2202/34 ,  C01B2202/36 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/13 ,  C01P2004/50 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2004/82 ,  C01P2006/10 ,  C01P2006/14 ,  C01P2006/60 ,  C01P2006/80 ,  C10G25/003 ,  C10G45/02 ,  C10G45/60 ,  C10G2300/1081 ,  C10G2300/1088 ,  C10G2300/202 ,  C30B23/00 ,  C30B29/605 ,  D01F9/12 ,  D01F11/122

摘要： Compositions including carbide-containing nanorods and/or oxycarbide-containing nanorods and/or carbon nanotubes bearing carbides and oxycarbides and methods of making the same are provided. Rigid porous structures including oxycarbide-containing nanorods and/or carbide containing nanorods and/or carbon nanotubes bearing carbides and oxycarbides and methods of making the same are also provided. The compositions and rigid porous structures of the invention can be used either as catalyst and/or catalyst supports in fluid phase catalytic chemical reactions. Processes for making supported catalyst for selected fluid phase catalytic reactions are also provided.

公开(公告)号：US20080176069A1

公开(公告)日：2008-07-24

申请号：US11841800

申请日：2007-08-20

申请人： Jun Ma ,  Howard Tennent

发明人： Jun Ma ,  Howard Tennent

IPC分类号： B32B9/00

CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/152 ,  C01B32/16 ,  C01B32/162 ,  C01B2202/02 ,  C01B2202/36 ,  Y10S977/735 ,  Y10S977/742 ,  Y10S977/75 ,  Y10T428/13 ,  Y10T428/2918

摘要： Methods of preparing single walled carbon nanotubes from a metal catalyst having deposited thereon fullerenes are provided. Fullerenes are deposited onto a metal catalyst precursor or metal catalyst. In the presence of a carbon containing gas, the metal catalyst precursor/fullerene composition is then exposed to conditions suitable for reducing the metal catalyst precursor, for subliming the fullerene and for growing single walled carbon nanotubes. The fullerenes form the end caps for the resulting single walled carbon nanotubes, which are uniform in diameter.

公开(公告)号：US20080176052A1

公开(公告)日：2008-07-24

申请号：US11841676

申请日：2007-08-20

申请人： Jun Ma ,  Alan Fiseher ,  Robert Hoch

发明人： Jun Ma ,  Alan Fiseher ,  Robert Hoch

IPC分类号： D01F9/12 ,  B32B5/02

CPC分类号： B82B1/00 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/16 ,  C01B32/174

摘要： The invention relates to carbon nanotube structures containing both single walled and multi walled carbon nanotubes, and methods for preparing same. These carbon nanotube structures include but are not limited to macroscopic two and three dimensional structures of carbon nanotubes such as assemblages, mats, plugs, networks, rigid porous structures, extrudates, etc. The carbon nanotube structures of the present invention have a variety of uses, including but not limited to, porous media for filtration, adsorption, chromatography; electrodes and current collectors for supercapacitors, batteries and fuel cells; catalyst supports, (including electrocatalysis), etc.

摘要翻译： 本发明涉及含有单壁和多壁碳纳米管的碳纳米管结构及其制备方法。 这些碳纳米管结构包括但不限于碳纳米管的宏观二维和三维结构，例如组合物，垫，塞子，网络，刚性多孔结构，挤出物等。本发明的碳纳米管结构具有多种用途 包括但不限于用于过滤，吸附，色谱的多孔介质; 用于超级电容器，电池和燃料电池的电极和集电器; 催化剂载体（包括电催化）等

公开(公告)号：US20080174291A1

公开(公告)日：2008-07-24

申请号：US12056784

申请日：2008-03-27

申请人： Anders Hansson ,  Thomas Sahlstrom ,  Jun Ma ,  Mattias Andersson

发明人： Anders Hansson ,  Thomas Sahlstrom ,  Jun Ma ,  Mattias Andersson

IPC分类号： G05F1/10

CPC分类号： H02M3/33515 ,  H02M1/4225 ,  H02M3/33523 ,  H02M2001/0009 ,  H02M2001/0012 ,  H02M2001/007 ,  Y02B70/126

摘要： The present invention relates to a switched mode power supply with programmable digital control and to a power supply system comprising a plurality of switched mode power supplies. The input terminals and the output terminals of the switched mode power supply system are separated by an insulation barrier, and the switched mode power supply comprises a conversion stage having at least one switching element. The switching element of the conversion stage, as well as any switching elements of a possible pre-regulator, is digitally controlled by a programmable digital circuit. In one embodiment of the switched mode power supply, the programmable digital circuit is located on the primary side of the insulation barrier.

公开(公告)号：US20080151799A1

公开(公告)日：2008-06-26

申请号：US11615292

申请日：2006-12-22

申请人： Nabil R. Yousef ,  Jun Ma ,  Chaoliang T. Chen

发明人： Nabil R. Yousef ,  Jun Ma ,  Chaoliang T. Chen

IPC分类号： G08C17/00

CPC分类号： H04N21/443 ,  H04H20/426 ,  H04N21/4382 ,  H04N21/4436 ,  H04N21/64315

摘要： A system and method of performing re-synchronization for a Digital Video Broadcasting over Handheld (DVB-H) receiver, wherein the method comprises performing a time division multiplexing (TDM) data burst transmission sequence on bits of data received by the DVB-H receiver; performing a data bit re-synchronization sequence on the DVB-H receiver; removing an on-chip timer and internal state registers in the DVB-H receiver; and allowing the DVB-H receiver to power off in between receipt of data bursts. Preferably, the removing process reduces the time to perform the re-synchronization in the DVB-H receiver. Preferably, the data bit re-synchronization sequence comprises performing an automatic gain control (AGC) lock process; performing a model and guard detecting process; performing a frequency offset estimation process; performing a transmit parameter signaling (TPS) detection process; performing a timing and carrier loop lock process; and performing an equalizer delay process.

摘要翻译： 一种用于对手持式数字视频广播（DVB-H）接收机执行重新同步的系统和方法，其中所述方法包括对由DVB-H接收机接收的数据位执行时分复用（TDM）数据脉冲串传输序列 ; 在DVB-H接收机上执行数据比特重新同步序列; 去除DVB-H接收机中的片上定时器和内部状态寄存器; 并允许DVB-H接收机在接收到数据脉冲串之间断电。 优选地，去除过程减少了在DVB-H接收机中执行重新同步的时间。 优选地，数据比特重新同步序列包括执行自动增益控制（AGC）锁定过程; 执行模型和保护检测过程; 执行频偏估计处理; 执行传输参数信令（TPS）检测过程; 执行定时和载波循环锁定过程; 并执行均衡器延迟处理。

公开(公告)号：US20080031802A1

公开(公告)日：2008-02-07

申请号：US11256902

申请日：2005-10-21

申请人： Jun Ma ,  Asif Chishti ,  Lein Ngaw ,  Alan Fischer ,  Robert Braden

发明人： Jun Ma ,  Asif Chishti ,  Lein Ngaw ,  Alan Fischer ,  Robert Braden

IPC分类号： D01F9/12

CPC分类号： H01G9/058 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B2202/02 ,  C01B2202/06 ,  C01B2202/36 ,  H01G11/34 ,  H01G11/36 ,  Y02E60/13

摘要： Methods of treating single walled and multiwalled carbon nanotubes with ozone are provided. The carbon nanotubes are treated by contacting the carbon nanotubes with ozone at a temperature range between 0° C. and 100° C. to yield functionalized nanotubes which are greater in weight than the untreated carbon nanotubes. The carbon nanotubes treated according to methods of the invention can be used to prepare complex structures such as three dimensional networks or rigid porous structures which can be utilized to form electrodes for fabrication of improved electrochemical capacitors. Useful catalyst supports are prepared by contacting carbon nanotube structures such as carbon nanotube aggregates, three dimensional networks or rigid porous structures with ozone in the temperature range between 0° C. and 100° C.

摘要翻译： 提供了用臭氧处理单壁和多壁碳纳米管的方法。 通过使碳纳米管与臭氧在0℃至100℃之间的温度范围内接触来处理碳纳米管，以产生比未处理的碳纳米管重量更大的官能化纳米管。 根据本发明的方法处理的碳纳米管可用于制备复合结构，例如可用于形成用于制造改进的电化学电容器的电极的三维网络或刚性多孔结构。 通过使碳纳米管结构如碳纳米管聚集体，三维网络或刚性多孔结构与臭氧在0℃至100℃之间的温度范围内接触来制备有用的催化剂载体。

公开(公告)号：US07308053B2

公开(公告)日：2007-12-11

申请号：US11592286

申请日：2006-11-02

申请人： Nabil R. Yousef ,  Jun Ma ,  Jonathan S. Min

发明人： Nabil R. Yousef ,  Jun Ma ,  Jonathan S. Min

IPC分类号： H04L27/06

CPC分类号： H04B1/707 ,  H04B2201/70701 ,  H04L2027/0055

摘要： Iterative data-aided carrier CFO estimation for CDMA systems. Any communication receiver may be adapted to perform the iterative data-aided carrier CFO estimation. The iterative data-aided carrier CFO estimation is performed using a high accuracy method. The operation may be described as follows: a received signal is despread and buffered. Using the received preamble sequence, an initial estimate of the CFO is obtained. This estimate is used to correct the whole despread data. The corrected data using the initial CFO estimate is sliced. Each despread data symbol is divided by the corresponding sliced data decision. The obtained sequence is then averaged across different codes to obtain a less noisy sequence, which is then used to estimate the CFO again. The procedure can be repeated (iterated) to obtain a more accurate carrier frequency offset estimate; the number of times in which the procedure is repeated may be programmable or predetermined.

摘要翻译： CDMA系统的迭代数据辅助载波CFO估计。 任何通信接收机可以适于执行迭代数据辅助载波CFO估计。 使用高精度方法进行迭代数据辅助载波CFO估计。 该操作可以描述如下：接收信号被解扩和缓冲。 使用接收到的前导序列，获得CFO的初始估计。 该估计用于校正整个解扩数据。 使用初始CFO估计的校正数据被切片。 每个解扩数据符号被相应的切片数据判定划分。 然后将获得的序列在不同的代码之间进行平均，以获得较少的噪声序列，然后将其用于再次估计CFO。 可以重复（迭代）该过程以获得更准确的载波频率偏移估计; 重复该过程的次数可以是可编程的或预定的。

公开(公告)号：US07274842B2

公开(公告)日：2007-09-25

申请号：US11094411

申请日：2005-03-31

申请人： Peter M Gulvin ,  Jun Ma ,  Pinyen Lin

发明人： Peter M Gulvin ,  Jun Ma ,  Pinyen Lin

IPC分类号： G02B6/26

CPC分类号： B81B3/0024 ,  B81B2201/045

摘要： An actuator system that includes two beams that are formed into a diamond pattern. A crossbar is positioned at a midsection to connect the two beams. When power is applied to the two beams, the diamond pattern is driven vertically. An actuator system may also include a substrate and a first layer above a second layer on the substrate. The first and second layers include upper and lower beams joined together at one end of the layers. A method of forming an actuator system includes forming a first layer above a second layer on a substrate, joining the first and second layers together at one end of the layers, and forming upper and lower beams. The upper and lower beams may be different in width, length and thickness to control a vertical movement of the actuator system.

摘要翻译： 一种致动器系统，包括形成为菱形图案的两个梁。 横梁位于中部以连接两个梁。 当向两个光束施加电力时，垂直驱动金刚石图案。 致动器系统还可以包括衬底和衬底上的第二层上方的第一层。 第一层和第二层包括在层的一端处连接在一起的上梁和下梁。 形成致动器系统的方法包括在衬底上形成第二层以上的第一层，在层的一端将第一层和第二层结合在一起，并形成上梁和下梁。 上梁和下梁的宽度，长度和厚度可以不同，以控制致动器系统的垂直运动。