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    • 1. 发明授权
    • Method for generating 2D OVSF codes in multicarrier DS-CDMA systems
    • 用于在多载波DS-CDMA系统中生成2D OVSF码的方法
    • US07197007B2
    • 2007-03-27
    • US10063771
    • 2002-05-11
    • Guu-Chang YangChia-Ming YangPei-Hsuan Lin
    • Guu-Chang YangChia-Ming YangPei-Hsuan Lin
    • H04J11/00
    • H04J13/0044H04J13/12H04L5/026
    • A code tree of two-dimensional orthogonal variable spreading factor (2D-OVSF) code matrices for a multicarrier direct-sequence code-division multiple-access (MC-DS/CDMA) communications system is generated by providing two sets of 2×2 orthogonal matrices {A(1)(2×2), A(2)(2×2)} and {B(1)(2×2), B(2)(2×2)}. The first set of 2×2 matrices is used to generate a pair of sibling nodes in the code tree that respectively represent matrices A(1)(2×2α) and A(2)(2×2α) by iterating the relationship: A(1)(2×21+β)=[A(1)(2×2β)A(2)(2×2β)], The matrices A(1)(2×2α) and A(2)(2×2α) are A(2)(2×21+β)=[A(1)(2×2β)−A(2)(2×2β)]. used to generate a child node of one of the sibling nodes. The child node contains an M×N matrix, which is found by iterating the relationship: A(i−1)(O×P)=[B(1)(2×2){circle around (×)}A(i/2)(0/2×P/2)] where {circle around (×)} indicates a Kronecker product. A(i)(O×P)=[B(2)(2×2){circle around (×)}A(i/2)(0/2×P/2)],
    • 通过提供两组2x2正交矩阵来生成用于多载波直接序列码分多址(MC-DS / CDMA)通信系统的二维正交可变扩频因子(2D-OVSF)码矩阵的码树 (2)/(2×2),(2×2),和(B) (1)(2x2),(2)(2x2)}。 第一组2x2矩阵用于在代码树中产生一对分别表示矩阵A 1(2)和(2)的兄弟节点 < / SUP2>< / SUB>< / SUP>< / SUP>(2) SUB>
    • 7. 发明授权
    • Video signal processing system with a dynamic ADC calibration loop and related methods
    • 视频信号处理系统采用动态ADC校准循环及相关方法
    • US07084795B2
    • 2006-08-01
    • US10908741
    • 2005-05-24
    • Sterling SmithChia-Ming Yang
    • Sterling SmithChia-Ming Yang
    • H03M1/10
    • H03M1/1028H03M1/12
    • A video signal processing system with a dynamic calibration loop of an ADC comprises a calibration switch for transmitting signals according to a control signal; a reference switch module for transmitting reference voltages according to a plurality of control signals; a reference voltage generator coupled to the reference switch module for providing the reference voltages; a coarse tuner coupled to the calibration switch and the reference switch module for coarse-tuning received signals; an ADC coupled to the coarse tuner for converting analog signals to digital signals; a fine-tuner coupled to the ADC for fine-tuning received signals; and a calibration logic module for controlling the calibration switch, the reference switch module, the coarse tuner, the ADC, and the fine tuner according to signals outputted from the fine tuner, so as to compensate errors of the ADC.
    • 具有ADC的动态校准环路的视频信号处理系统包括用于根据控制信号发送信号的校准开关; 参考开关模块,用于根据多个控制信号传输参考电压; 耦合到参考开关模块的参考电压发生器,用于提供参考电压; 耦合到校准开关的粗调谐器和用于对接收信号进行粗调的参考开关模块; 耦合到粗调谐器的ADC,用于将模拟信号转换成数字信号; 耦合到ADC的微​​调器,用于微调接收信号; 以及校准逻辑模块,用于根据从精细调谐器输出的信号来控制校准开关,参考开关模块,粗调谐器,ADC和精细调谐器,以补偿ADC的误差。