会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明申请
    • Apparatus and method for estimating and compensating sampling frequency offset
    • 用于估计和补偿采样频率偏移的装置和方法
    • US20090135978A1
    • 2009-05-28
    • US12073819
    • 2008-03-11
    • Chi-Tung ChangTzu-Wen SungChuen-Heng WangYu-Ling Chen
    • Chi-Tung ChangTzu-Wen SungChuen-Heng WangYu-Ling Chen
    • H04L7/00H04L25/00
    • H04L27/2657H04L27/0014H04L27/2675H04L2027/0067
    • An apparatus and method for estimating and compensating sampling frequency offset are disclosed. Particularly, a linear mathematical scheme is employed to calculate the related phase difference for saving use of multipliers and storage circuit used for sampling frequency offset estimation and compensation in the conventional art. The preferred embodiment of the invention has a first step to receive signals by the offset estimating circuit. Next, the phase value for each signal is calculated, and the pilot signal therein is retrieved. Next, a phase difference is obtained by subtraction operation between the received symbols and the delayed pilot symbols. And a circuit for storing the phase differences is incorporated. Next, a phase difference between the adjacent symbols is obtained by accumulating the phases and processing the least-error-sum-of-squares operation. Therefore, an estimation value of the sampling frequency offset of a communication system is obtained, and further to compensate the offset.
    • 公开了一种用于估计和补偿采样频率偏移的装置和方法。 特别地,采用线性数学方案来计算用于节省使用乘法器的相关相位差和用于采样频率偏移估计和补偿的存储电路。 本发明的优选实施例具有通过偏移估计电路接收信号的第一步骤。 接下来,计算每个信号的相位值,并且检索其中的导频信号。 接下来,通过在接收到的符号和延迟的导频符号之间的减法运算获得相位差。 并且并入存储相位差的电路。 接下来,相邻符号之间的相位差通过累积相位和处理最小二乘方差运算来获得。 因此,获得通信系统的采样频率偏移的估计值,并进一步补偿偏移。
    • 2. 发明申请
    • Apparatus and method for adaptively calculating symbolic start position
    • 自适应计算符号起始位置的装置和方法
    • US20100124175A1
    • 2010-05-20
    • US12292223
    • 2008-11-14
    • Chi-Tung ChangTzu-Wen SungYu-Ling Chen
    • Chi-Tung ChangTzu-Wen SungYu-Ling Chen
    • H04J1/16H04L12/56
    • H04L7/042H04L27/2656H04L27/2675H04L27/2692
    • An apparatus and a method for adaptively calculating a start position of a series of symbols are provided. The method is applied to a frame synchronization circuit that implements the apparatus for calculating the symbolic start position of a packet-switching communication system. Even under the situations such as higher frequency offset, the frequency offset value approaching zero or unstable frequency offset, the frame synchronization circuit using the claimed method still can estimate the symbolic start position. The preferred method includes a first step of retrieving the signals in a unit of packets, and calculating their delay correlation value. Next, a control circuit is incorporated to retrieve multiple groups of symbols, and to set the parameters of the systems as a basis for identifying the system's property. After that, it's to estimate the symbolic start position.
    • 提供了一种用于自适应地计算一系列符号的开始位置的装置和方法。 该方法应用于实现用于计算分组交换通信系统的符号开始位置的装置的帧同步电路。 即使在较高的频率偏移,频率偏移值接近零或不稳定的频率偏移的情况下,使用所要求保护的方法的帧同步电路仍然可以估计符号开始位置。 优选的方法包括以分组为单位检索信号并计算其延迟相关值的第一步骤。 接下来,结合控制电路来检索多组符号,并且将系统的参数设置为用于识别系统属性的基础。 之后,它是估计象征性的起始位置。
    • 6. 发明申请
    • Method and a circuit for estimating the signal quality of a communication channel and a wireless receiving apparatus using the same
    • 用于估计通信信道的信号质量的方法和电路以及使用该通信信道的无线接收装置
    • US20090092179A1
    • 2009-04-09
    • US11987028
    • 2007-11-27
    • Chi-Tung ChangChun-Yi WuYu-Ling Chen
    • Chi-Tung ChangChun-Yi WuYu-Ling Chen
    • H04Q1/20
    • H04L1/20H04L1/0002
    • A method for estimating the signal quality of a communication channel is disclosed. Firstly, an input signal passes through a match filter at the initial stage of an estimation period. Next, the output of the match filter is calculated to obtain the noise reference value within a pre-determined period. The output value of the match filter and the noise reference value are compared. When the output value of the match filter is larger than the noise reference value, a valid power value is obtained according to the output value of the match filter. The valid power values are accumulated. Finally, a SNR is calculated according to the noise reference value and the accumulated valid power value at the end of the estimation period. Thereby, the signal quality of the wireless communication channel is estimated according to the SNR, and the signal transmission rate is determined.
    • 公开了一种用于估计通信信道的信号质量的方法。 首先,在估计周期的初始阶段,输入信号通过匹配滤波器。 接下来,计算匹配滤波器的输出,以在预定周期内获得噪声参考值。 比较匹配滤波器的输出值和噪声参考值。 当匹配滤波器的输出值大于噪声参考值时,根据匹配滤波器的输出值获得有效的功率值。 累积有效功率值。 最后,根据估计周期结束时的噪声参考值和累计有效功率值计算SNR。 因此,根据SNR估计无线通信信道的信号质量,并确定信号传输速率。
    • 7. 发明授权
    • Flash memory storage device and read/write method
    • 闪存存储设备和读/写方式
    • US07516296B2
    • 2009-04-07
    • US11581430
    • 2006-10-17
    • Chi-Tung ChangChia-Wei HouKuo-Hsiang HsuWen-Hao Cheng
    • Chi-Tung ChangChia-Wei HouKuo-Hsiang HsuWen-Hao Cheng
    • G06F12/06
    • G06F12/0246
    • A memory storage device and a read/write method thereof, first defining logically the flash memory as at least one particular data management area and at least one common data management area; next, determining the logical block address located in the particular data management area or the common data management area according to data transmitted to an external system by an area decision mechanism, wherein the method of writing to the particular data management area is by using a method of dynamic deviation value, and the method of writing to the common data management area is by using a method of same displacement value. Whereby, the particular data management area can be avoided moving frequently caused by updating data from the external system to improve read/write performance of the flash memory.
    • 一种存储器存储设备及其读/写方法,首先将闪速存储器逻辑地定义为至少一个特定数据管理区域和至少一个公共数据管理区域; 接下来,根据通过区域判定机构发送给外部系统的数据来确定位于特定数据管理区域或公共数据管理区域中的逻辑块地址,其中写入特定数据管理区域的方法是使用方法 的动态偏差值,并且写入公共数据管理区域的方法是通过使用相同位移值的方法。 由此,可以避免特定的数据管理区域通过从外部系统更新数据而频繁地移动,以提高闪速存储器的读/写性能。
    • 8. 发明申请
    • Method to Access Storage Device Through Universal Serial Bus
    • 通过通用串行总线访问存储设备的方法
    • US20080276037A1
    • 2008-11-06
    • US12172672
    • 2008-07-14
    • Chi-Tung ChangChing-Wen Wang
    • Chi-Tung ChangChing-Wen Wang
    • G06F12/02
    • G06F3/0656G06F3/0613G06F3/0679
    • A method accessing a flash memory storage device through universal serial bus (USB) of the present invention includes a flash controller and a flash memory, wherein the method includes connecting the storage device to a USB interface of an electronic device; outputting a plurality of accessing instructions to the flash controller via the electronic device; deciding which data is needed to be temporarily saved in a cache memory and a priority of the accessing instructions according to the characteristic of the file system and the content of preceding instructions of the flash controller; and writing the data temporarily saved in the cache memory into the flash memory according to the priority of the flash controller. The objective of the method of the present invention is to enhance the operation efficiency of the storage device.
    • 通过本发明的通用串行总线(USB)访问闪存存储设备的方法包括闪存控制器和闪速存储器,其中该方法包括将存储设备连接到电子设备的USB接口; 经由电子设备向闪存控制器输出多个访问指令; 根据文件系统的特性和闪存控制器的前述指令的内容,确定需要临时保存在高速缓冲存储器中的数据和访问指令的优先级; 并根据闪存控制器的优先级将临时保存在高速缓冲存储器中的数据写入闪速存储器。 本发明的方法的目的是提高存储装置的操作效率。
    • 10. 发明申请
    • Integrated hub control chip
    • 集成集线器控制芯片
    • US20080120454A1
    • 2008-05-22
    • US11638481
    • 2006-12-14
    • Chi-Tung ChangShih-Min LanI-Chieh Lin
    • Chi-Tung ChangShih-Min LanI-Chieh Lin
    • G06F3/00
    • G06F13/4022G06F2213/0042
    • An integrated hub control chip is applied to a motherboard of an application system. The integrated hub control chip contains an upstream port transceiver, an upstream port controller, a relaying circuit unit, a keyboard control module, a digital camera control module, a storage medium control module, and a relaying circuit controller. The keyboard control module, the digital camera control module, and the storage medium control module are directly connected to the relaying circuit controller. The relaying circuit controller switches the transmission path of the relaying circuit unit according to the transmission speed of these control modules. The upstream port controller controls the transmission direction of the upstream port transceiver to accomplish the data communication with the motherboard. The objects of saving the circuit space of motherboard, reducing the hardware cost, and increasing the purposes and expansibility of the integrated hub control chip can therefore be achieved.
    • 将集成的集线器控制芯片应用于应用系统的主板。 集成集线器控制芯片包括上行端口收发器,上游端口控制器,中继电路单元,键盘控制模块,数字照相机控制模块,存储介质控制模块和中继电路控制器。 键盘控制模块,数码相机控制模块和存储介质控制模块直接连接到继电电路控制器。 中继电路控制器根据这些控制模块的传输速度切换中继电路单元的传输路径。 上行端口控制器控制上行端口收发器的传输方向,完成与主板的数据通信。 因此可以实现节省主板电路空间,降低硬件成本,增加集成集线器控制芯片的目的和可扩展性的目的。