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118 条记录 (耗时 0.019 秒)

    Simple smart-antenna system for MUD-enabled cellular networks
    1.
    发明授权
    Simple smart-antenna system for MUD-enabled cellular networks 有权
    用于支持MUD的蜂窝网络的简单智能天线系统

    公开(公告)号：US07130662B2

    公开(公告)日：2006-10-31

    申请号：US10331073

    申请日：2002-12-27

    申请人： Leonid Kazakevich ,  Rui Yang ,  Alexander Reznik

    发明人： Leonid Kazakevich ,  Rui Yang ,  Alexander Reznik

    IPC分类号： H04B1/38 ,  H04M1/00

    CPC分类号： H04B7/04

    摘要： A “smart antenna” method and system for use in cellular networks where the wireless transmit receive unit and/or the base station utilize multi-user detection (MUD). The interference to and from other users is taken into consideration to maximize the desired signal while eliminating or reducing interfering signals, thereby increasing overall system capacity.

    摘要翻译： 一种在无线发射接收单元和/或基站利用多用户检测（MUD）的蜂窝网络中使用的“智能天线”方法和系统。 考虑到来自其他用户的干扰以最大化期望的信号，同时消除或减少干扰信号，从而增加整个系统容量。

    Simple smart-antenna system for mud-enabled cellular networks
    2.
    发明申请
    Simple smart-antenna system for mud-enabled cellular networks 审中-公开
    用于支持泥浆的蜂窝网络的简单智能天线系统

    公开(公告)号：US20070049349A1

    公开(公告)日：2007-03-01

    申请号：US11590966

    申请日：2006-10-31

    申请人： Leonid Kazakevich ,  Rui Yang ,  Alexander Reznik

    发明人： Leonid Kazakevich ,  Rui Yang ,  Alexander Reznik

    IPC分类号： H04M1/00

    CPC分类号： H04B7/04

    摘要： A “smart antenna” method and system for use in cellular networks where the wireless transmit receive unit and/or the base station utilize multi-user detection (MUD). The interference to and from other users is taken into consideration to maximize the desired signal while eliminating or reducing interfering signals, thereby increasing overall system capacity.

    摘要翻译： 一种在无线发射接收单元和/或基站利用多用户检测（MUD）的蜂窝网络中使用的“智能天线”方法和系统。 考虑到来自其他用户的干扰以最大化期望的信号，同时消除或减少干扰信号，从而增加整个系统容量。

    Carrier offset estimator
    5.
    发明申请
    Carrier offset estimator 审中-公开
    载波偏移估计器

    公开(公告)号：US20070268978A1

    公开(公告)日：2007-11-22

    申请号：US11888168

    申请日：2007-07-31

    申请人： Leonid Kazakevich ,  Fatih Ozluturk ,  Alexander Reznik

    发明人： Leonid Kazakevich ,  Fatih Ozluturk ,  Alexander Reznik

    IPC分类号： H04L5/12

    CPC分类号： H04L27/3836 ,  H04L27/2332 ,  H04L27/3854 ,  H04L2027/0065 ,  H04L2027/0085

    摘要： A system for estimating carrier offset includes includes a transmitter configured to transmit a quadrature modulated signal, and a receiver. The receiver includes an input configured to receive the quadrature modulated signal, a local oscillator configured to generate cosine and sine waves at a carrier frequency of the quadrature modulated signal, at least one cosine mixer configured to generate a carrier frequency demodulated output, at least one sine mixer configured to generate a carrier frequency demodulated output, a plurality of lowpass filters configured to filter the demodulated output of the cosine and sine mixers to produce filtered cosine and sine signal components, and a carrier offset detection processor to estimate a carrier offset between the carrier frequency and a local oscillator frequency based on the filtered output of the lowpass filters.

    摘要翻译： 用于估计载波偏移的系统包括：发射机，被配置为发送正交调制信号;以及接收机。 所述接收机包括被配置为接收所述正交调制信号的输入端，被配置为在所述正交调制信号的载波频率上产生余弦和正弦波的本地振荡器，配置成产生载波频率解调输出的至少一个余弦混频器，至少一个 配置为产生载波频率解调输出的多个低通滤波器，多个低通滤波器，被配置为对余弦和正弦混频器的解调输出进行滤波，以产生滤波余弦和正弦信号分量;以及载波偏移检测处理器，用于估计载波偏移 基于低通滤波器的滤波输出的载波频率和本地振荡器频率。

    Method and system for code reuse and capacity enhancement using null steering
    7.
    发明申请
    Method and system for code reuse and capacity enhancement using null steering 有权
    使用零转向的代码重用和容量增强的方法和系统

    公开(公告)号：US20070171962A1

    公开(公告)日：2007-07-26

    申请号：US11731617

    申请日：2007-03-30

    申请人： Nadar Bolourchi ,  Leonid Kazakevich ,  Rui Yang

    发明人： Nadar Bolourchi ,  Leonid Kazakevich ,  Rui Yang

    IPC分类号： H04B1/00

    CPC分类号： H01Q3/2611 ,  H04B7/0617 ,  H04B7/0669 ,  H04J13/0077 ,  H04W88/08

    摘要： The number of users and data capacity of wireless systems are increased by employing apparatus and method for increasing the number of spreading codes available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes that may correlate to those already being used within the same sector/cell. This, in return, provides capacity improvement proportional to the number of added base station (BS) antennas for each cell. An antenna null steering technique for code allocation maintains the cross correlation properties of the codes only for the desired user and to obtain a gain in capacity improvement.

    摘要翻译： 通过采用用于增加系统中可用的扩展码数目的装置和方法来提高无线系统的用户数量和数据容量，提供一种机制来重用已经分配的扩展码或使用可能与已经分配的扩展码相关的代码 在相同的扇区/单元格内使用。 这反过来提供了与每个小区的增加的基站（BS）天线的数量成比例的能力提高。 用于代码分配的天线零点转向技术仅针对期望的用户维护代码的互相关性质，并获得容量改进的增益。

    GAIN CONTROL METHOD AND APPARATUS
    8.
    发明申请
    GAIN CONTROL METHOD AND APPARATUS 失效
    增益控制方法和装置

    公开(公告)号：US20080240259A1

    公开(公告)日：2008-10-02

    申请号：US12135288

    申请日：2008-06-09

    申请人： Leonid Kazakevich ,  Rui Yang

    发明人： Leonid Kazakevich ,  Rui Yang

    IPC分类号： H04B14/04

    CPC分类号： H03G7/06 ,  H03G3/001 ,  H03M1/1235

    摘要： An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.

    摘要翻译： 模拟/数字增益控制装置避免了与闭环AGC电路的性质相关的一些要求，并且不需要很多困难就可以满足剩余的要求，使用模数转换方法，通过压缩有效的ADC位数来增加有效的ADC位数 基带输入模拟信号使用对数电路。 在将压缩的模拟信号转换为数字信号之后，使用数字反对数处理或查找表（LUT）将数字信号扩展回原始的线性刻度。 由于反日志功能的性质，反日志进程输出的字大小大于输入字大小。 为了减小数字信号的字大小，可以应用开环归一化技术。

    METHOD AND APPARATUS FOR ESTIMATING AND CONTROLLING INITIAL TIME SLOT GAIN IN A WIRELESS COMMUNICATION SYSTEM
    9.
    发明申请
    METHOD AND APPARATUS FOR ESTIMATING AND CONTROLLING INITIAL TIME SLOT GAIN IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    用于无线通信系统中初始时间段增益的估计和控制的方法和装置

    公开(公告)号：US20080070536A1

    公开(公告)日：2008-03-20

    申请号：US11944852

    申请日：2007-11-26

    申请人： Rui Yang ,  Donald Grieco ,  Leonid Kazakevich

    发明人： Rui Yang ,  Donald Grieco ,  Leonid Kazakevich

    IPC分类号： H03G3/30 ,  H04L5/14

    CPC分类号： H03G3/3052 ,  H03G3/3036 ,  H03G3/3042 ,  H03G3/3047 ,  H04L5/1484 ,  H04M3/40

    摘要： In a time-division duplex (TDD) system, a reliable initialization scheme that is applicable to an automatic gain controller (AGC) at a base station is implemented in various forms depending on the availability of certain information such as signal-to-interference ratio (SIR), spreading factors and other parameters. A more accurate estimation of the initial control word of a gain-adjustable amplifier for one or more time slots is implemented. The scheme is applicable to AGC initialization for each time slot of the TDD system, but is also applicable to other systems of transmission, without limitation.

    摘要翻译： 在时分双工（TDD）系统中，可以根据某些信息的可用性（例如信号干扰比）来以各种形式实现适用于基站处的自动增益控制器（AGC）的可靠的初始化方案 （SIR），扩散因子等参数。 实现了用于一个或多个时隙的增益可调放大器的初始控制字的更准确的估计。 该方案适用于TDD系统的每个时隙的AGC初始化，但也适用于其他传输系统，但不限于此。