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7 条记录 (耗时 0.028 秒)

    Reducing power control errors in wireless communication system
    3.
    发明授权
    Reducing power control errors in wireless communication system 有权
    降低无线通信系统的功率控制误差

    公开(公告)号：US07415285B2

    公开(公告)日：2008-08-19

    申请号：US10256606

    申请日：2002-09-27

    申请人： Mansour A. Aldajani ,  Ali H. Sayed

    发明人： Mansour A. Aldajani ,  Ali H. Sayed

    IPC分类号： H04B7/00 ,  H04B1/04 ,  H04Q7/20 ,  H04B17/00

    CPC分类号： H04W52/223 ,  H04W52/08 ,  H04W52/36

    摘要： The present invention provides a method for predicting channel power fading in a wireless communications system. This prediction method estimates the channel power fading via oversampling of the received and transmitted powers. The prediction method is then combined with several proposed structures for closed loop power control. The resulting structures result in improved performance in wireless communications systems.

    摘要翻译： 本发明提供一种用于预测无线通信系统中的信道功率衰落的方法。 该预测方法通过接收和发射功率的过采样来估计信道功率衰落。 然后将预测方法与几个提出的闭环功率控制结构组合。 所得到的结构导致无线通信系统中的性能提高。

    Adaptive multi-bit delta and sigma-delta modulation
    4.
    发明授权
    Adaptive multi-bit delta and sigma-delta modulation 有权
    自适应多位增量和Σ-Δ调制

    公开(公告)号：US07391350B2

    公开(公告)日：2008-06-24

    申请号：US10529712

    申请日：2003-10-15

    申请人： Mansour A. Aldajani ,  Ali H. Sayed

    发明人： Mansour A. Aldajani ,  Ali H. Sayed

    IPC分类号： H03M3/00

    CPC分类号： H03M3/484 ,  H03M3/04 ,  H03M3/43 ,  H03M3/456

    摘要： An adaptive multi-bit delta and sigma-delta modulation and demodulation technique, wherein a one-bit modulator generates a binary output signal from an analog input signal and a multi-bit adapter for generating a scaling signal for scaling a step-size of the sigma-delta modulator.

    摘要翻译： 一种自适应多位增量和Σ-Δ调制和解调技术，其中一位调制器从模拟输入信号产生二进制输出信号和多位适配器，用于产生缩放信号，用于缩放 Σ-Δ调制器。

    Vision-based pointer tracking and object classification method and apparatus
    5.
    发明授权
    Vision-based pointer tracking and object classification method and apparatus 有权

    公开(公告)号：US07148913B2

    公开(公告)日：2006-12-12

    申请号：US10269797

    申请日：2002-10-12

    申请人： Patricia Trish Keaton ,  Sylvia Dominguez ,  Ali H. Sayed

    发明人： Patricia Trish Keaton ,  Sylvia Dominguez ,  Ali H. Sayed

    IPC分类号： H04N5/225 ,  G06F3/033

    CPC分类号： G06F3/042 ,  G06F3/011 ,  G06F3/0304 ,  G06K9/00375

    摘要： A vision-based pointer tracking and object recognizing system is presented. The system comprises a computer system including a processor, a memory coupled with the processor, an input coupled with the processor for receiving a series of image frames from a camera, and an output coupled with the processor for outputting a path of a pointer. The computer system includes a tracking system and a recognition system which are configured to accurately and efficiently track the fingertip of a user in order to allow the user to perform coarse segmentation of an object in preparation for object classification. The tracking system includes a Robust Tracking Filter that accommodates uncertainties. The object recognition system incorporates an invariant object recognition technique that allows objects to be recognized despite changes in user viewpoint.

    Adaptive sigma-delta modulation with improved dynamic range
    6.
    发明授权
    Adaptive sigma-delta modulation with improved dynamic range 有权
    具有改进的动态范围的自适应Σ-Δ调制

    公开(公告)号：US07073113B2

    公开(公告)日：2006-07-04

    申请号：US10332750

    申请日：2001-07-13

    申请人： Ali H. Sayed ,  Mansour A. Aldajani

    发明人： Ali H. Sayed ,  Mansour A. Aldajani

    IPC分类号： G06F11/00

    CPC分类号： H04L25/4927 ,  H03M3/484

    摘要： An adaptive sigma-delta modulation and demodulation technique, wherein a quantizer step-size is adapted based on estimates of an input signal to the quantizer, rather than on estimates of an input signal to the modulator.

    摘要翻译： 一种自适应Σ-Δ调制和解调技术，其中基于对量化器的输入信号的估计而不是对调制器的输入信号的估计来适应量化器步长。

    Method and apparatus for resolving multipath components for wireless location finding
    7.
    发明授权
    Method and apparatus for resolving multipath components for wireless location finding 有权

    公开(公告)号：US07068742B2

    公开(公告)日：2006-06-27

    申请号：US10214934

    申请日：2002-08-07

    申请人： Nabil R. Yousef ,  Ali H. Sayed

    发明人： Nabil R. Yousef ,  Ali H. Sayed

    IPC分类号： H04L1/02 ,  H04B7/10

    CPC分类号： H04L25/0212 ,  H04B1/1027 ,  H04B1/1081 ,  H04B7/005

    摘要： A method and apparatus that provides an accurate estimate of the time and amplitude of arrival of the first arriving overlapping multipath components (rays) in wireless locating finding systems. Overlapping fading multipath components for mobile-positioning are resolved by exploiting the fact that multipath components fade independently. Although fast channel fading is usually considered a challenge to the location finding process, it is used as an additional tool to detect and resolve overlapping multipath rays. A projection technique is also provided that exploits all possible a-priori channel information into a adaptive filtering algorithm, thus providing needed robustness to divergence of the adaptive algorithm that might result from possible severe data matrix ill-conditioning and high noise levels, which are common in wireless location applications.