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    • 21. 发明授权
    • Blind selected mapping techniques for crest factor reduction of forward link CDMA signals
    • 盲目选择的前向链路CDMA信号波峰因数降低的映射技术
    • US07535950B2
    • 2009-05-19
    • US11301381
    • 2005-12-12
    • Ning ChenGuotong Zhou
    • Ning ChenGuotong Zhou
    • H04B1/69H04B7/216
    • H04B1/707H04B2201/70706
    • Disclosed are apparatus that implement blind selected mapping techniques that provide for crest factor reduction of forward link CDMA signals. Communication signals are processed using a mathematical algorithm that selectively maps a summed communication signal in a frame to another summed communication signal which has a smaller peak-to-average power ratio. The reduced dynamic range communication signal is amplified and transmitted to a receiver. At the receiver, the reduced power communication signal is processed using a mathematical algorithm that detects the selected mapping index used in the transmitter and converts the received signals into the original communication signals.
    • 公开了实现盲目选择的映射技术的设备,其提供前向链路CDMA信号的波峰因数降低。 使用选择性地将帧中的相加的通信信号映射到具有较小峰值与平均功率比的另一个相加的通信信号的数学算法来处理通信信号。 减小的动态范围通信信号被放大并发送到接收机。 在接收机处,使用检测发射机中使用的选择的映射索引的数学算法来处理降低功率的通信信号,并将接收的信号转换成原始的通信信号。
    • 22. 发明授权
    • Cleaning process and apparatus for silicate materials
    • 硅酸盐材料清洗工艺和设备
    • US07452475B2
    • 2008-11-18
    • US11061013
    • 2005-02-17
    • Samantha S. H. TanNing Chen
    • Samantha S. H. TanNing Chen
    • B44C1/22
    • C23C16/4404C23C16/4407
    • A method for treating a surface of a quartz substrate includes preparing a substrate to provide a working surface having an initial roughness; and then ultrasonically acid-etching the working surface to increase the roughness of the working surface by at least about 10%. In one embodiment, the initial surface roughness is greater than about 10 Ra, and in another embodiment the initial surface roughness is greater than about 200 Ra. In a still further embodiment, the initial surface area, if less than about 200 Ra, is increased to greater than about 200 Ra. In other embodiments of the present invention, the working surface roughness is increased by at least about 25% or at least about 50%. Simultaneous with the increase in surface area (as measured by the roughness), the surface defects are reduced to reduce particulate contamination from the substrate.
    • 一种用于处理石英基板的表面的方法包括制备基板以提供具有初始粗糙度的工作表面; 然后对工作表面进行超声波酸蚀,使工作表面的粗糙度增加至少约10%。 在一个实施方案中,初始表面粗糙度大于约10Ra,在另一个实施方案中,初始表面粗糙度大于约200Ra。 在另一个实施方案中,初始表面积(如果小于约200Ra)增加至大于约200Ra。 在本发明的其它实施例中,工作表面粗糙度增加至少约25%或至少约50%。 与表面积增加同步(通过粗糙度测量),表面缺陷减少,从而降低基材的颗粒污染。
    • 24. 发明申请
    • Power De-Rating Reduction In a Transmitter
    • 变送器功率降低
    • US20080043877A1
    • 2008-02-21
    • US11465976
    • 2006-08-21
    • Ning ChenJeffrey KeatingStephen C. MaJames W. McCoy
    • Ning ChenJeffrey KeatingStephen C. MaJames W. McCoy
    • H04L27/00
    • H04L27/2623
    • A wireless transmitter exhibits improved power de-rating reduction, which improves the power efficiency of non-constant envelop communication systems by: mapping N first samples of a first discrete Fourier transform (DFT) of a group of coded symbols to M sub-carriers according to a first sub-carrier mapping rule, where M is greater than N, performing a first inverse DFT (IDFT) on the M sub-carriers to provide M second samples, clipping the M second samples according to a clipping rule to provide M third samples, performing a second DFT on the M third samples, de-mapping the M third samples to N fourth samples, and mapping the N fourth samples to O subcarriers according to a predetermined second subcarrier mapping rule, where O is greater than or equal to M. The transmitter may be advantageously implemented within a single carrier transmission scheme, such as systems that implement a single carrier-frequency division multiple access (SC-FDMA) uplink transmission scheme.
    • 一种无线发射机具有改善的降低功率的功率,其通过以下方式提高了非恒定包络通信系统的功率效率:将编码符号组的第一离散付里叶变换(DFT)的N个第一采样映射到M个子载波, 对于M大于N的第一子载波映射规则,在M个子载波上执行第一反向DFT(IDFT)以提供M个第二采样,根据限幅规则对M个第二采样进行削波以提供M个 采样,对M个第三采样执行第二DFT,将M个第三采样去映射到N个第四采样,并根据预定的第二子载波映射规则将N个第四采样映射到O个子载波,其中O大于或等于 可以有利地在单载波传输方案中实现发射机,诸如实现单载波频分多址(SC-FDMA)上行链路传输方案的系统。
    • 26. 发明授权
    • Cleaning process and apparatus for silicate materials
    • 硅酸盐材料清洗工艺和设备
    • US07045072B2
    • 2006-05-16
    • US10627185
    • 2003-07-24
    • Samantha S. H. TanNing Chen
    • Samantha S. H. TanNing Chen
    • B44C1/22C03C15/00C03C25/68C23F1/00
    • C23C16/4404C23C16/4407
    • A method for treating a surface of a quartz substrate includes preparing a substrate to provide a working surface having an initial roughness; and then ultrasonically acid-etching the working surface to increase the roughness of the working surface by at least about 10%. In one embodiment, the initial surface roughness is greater than about 10 Ra, and in another embodiment the initial surface roughness is greater than about 200 Ra. In a still further embodiment, the initial surface area, if less than about 200 Ra, is increased to greater than about 200 Ra. In other embodiments of the present invention, the working surface roughness is increased by at least about 25% or at least about 50%. Simultaneous with the increase in surface area (as measured by the roughness), the surface defects are reduced to reduce particulate contamination from the substrate.
    • 一种用于处理石英基板的表面的方法包括制备基板以提供具有初始粗糙度的工作表面; 然后对工作表面进行超声波酸蚀,使工作表面的粗糙度增加至少约10%。 在一个实施方案中,初始表面粗糙度大于约10Ra,在另一个实施方案中,初始表面粗糙度大于约200Ra。 在另一个实施方案中,初始表面积(如果小于约200Ra)增加至大于约200Ra。 在本发明的其它实施例中,工作表面粗糙度增加至少约25%或至少约50%。 与表面积增加同步(通过粗糙度测量),表面缺陷减少,从而降低基材的颗粒污染。