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1. 发明授权

US07826554B2 Digital transmitter 有权
标题翻译：数字发射机
公开(公告)号：US07826554B2
公开(公告)日：2010-11-02
申请号：US11685003
申请日：2007-03-12
申请人： Tanbir Haque , Leonid Kazakevich
发明人： Tanbir Haque , Leonid Kazakevich
IPC分类号： H04K1/02
CPC分类号： H04L27/361 , H03F3/217 , H03F3/24 , H03F2200/331 , H03F2200/336 , H04B1/0014 , H04B1/0475 , H04B2001/0408 , H04L27/362 , H04L27/364
摘要： In a digital Cartesian modulation transmitter, an encoder generates 1-bit logic signals from in-phase and quadrature signals. A single bit digital modulator multiplexes the 1-bit logic signals for Cartesian I/Q modulation. A digital upconverter (DUC) upconverts the multiplexed 1-bit logic signal. A digital power amplifier (DPA) generates a radio frequency (RF) signal based on the upconverted signal. In a digital polar modulation transmitter, an encoder converts a magnitude signal to a first 1-bit logic signal. A digital phase modulator modulates a carrier using a phase signal to generate a second 1-bit logic signal. A DUC upconverts the second 1-bit logic signal. A first-in first-out (FIFO) memory stores the first 1-bit logic signal. A combiner combines angle information contained in the second 1-bit logic signal with magnitude information contained in the first 1-bit logic signal stored in the FIFO memory. A DPA generates an RF signal based on the combined signal.
摘要翻译：在数字笛卡尔调制发射机中，编码器从同相和正交信号中产生1位逻辑信号。单位数字调制器将1位逻辑信号复用为笛卡尔I / Q调制。数字上变频器（DUC）将多路复用的1位逻辑信号上变频。数字功率放大器（DPA）基于上变频信号产生射频（RF）信号。在数字极化调制发射机中，编码器将幅度信号转换为第一个1位逻辑信号。数字相位调制器使用相位信号来调制载波以产生第二个1位逻辑信号。 DUC将第二个1位逻辑信号上变频。先进先出（FIFO）存储器存储第一个1位逻辑信号。组合器将包含在第二1位逻辑信号中的角度信息与存储在FIFO存储器中的第一1位逻辑信号中包含的幅度信息相结合。 DPA根据组合信号产生RF信号。

2. 发明授权

US07660561B2 Method and system for implementing smart antennas and diversity techniques 失效
标题翻译：实现智能天线和分集技术的方法和系统
公开(公告)号：US07660561B2
公开(公告)日：2010-02-09
申请号：US10769690
申请日：2004-01-22
申请人： Leonid Kazakevich , Gerard Klahn , Fatih Ozluturk
发明人： Leonid Kazakevich , Gerard Klahn , Fatih Ozluturk
IPC分类号： H03C7/02
CPC分类号： H04B7/0868 , H04B7/0811 , H04B7/0857
摘要： Method and apparatus for transfer of signals from multiple antennas down to baseband over a common radio frequency (RF) chain. Antenna selection having greater flexibility and applicability to both uplink and downlink is obtained by giving priority to the antenna receiving a better/best quality signal. Measurements are taken by at least a channel estimator during each time slot to determine the weighting to be given to the antenna with the better/best quality signal. Techniques and apparatus are provided to take measurements over a range of intervals from time slots to single symbols, for example, to select the best signal. The techniques described herein may be used individually, and in some cases are combined to receive additional benefits in efficiency. For example, one or more of recent and/or current channel estimation, history, optimization may be employed, in addition to channel estimation, to determine signal quality.
摘要翻译：用于通过公共射频（RF）链将信号从多个天线向下传输到基带的方法和装置。通过优先考虑接收更好/最佳质量信号的天线，获得对上行链路和下行链路具有更大灵活性和适用性的天线选择。在每个时隙期间由至少一个信道估计器进行测量，以确定将以更好/最佳质量信号给予天线的加权。提供了技术和装置，以在从时隙到单个符号的间隔范围内进行测量，例如选择最佳信号。本文描述的技术可以单独使用，并且在一些情况下被组合以获得效率的附加益处。例如，除了信道估计之外，可以采用近期和/或当前信道估计，历史，优化中的一个或多个来确定信号质量。

3. 发明授权

US07489672B2 RLAN wireless telecommunication system with RAN IP gateway and methods 有权
标题翻译： RLAN无线电信系统，具有RAN IP网关和方法
公开(公告)号：US07489672B2
公开(公告)日：2009-02-10
申请号：US10329099
申请日：2002-12-23
申请人： Prabhakar R. Chitrapu , Narayan Parappil Menon , Fatih M. Ozluturk , Leonid Kazakevich
发明人： Prabhakar R. Chitrapu , Narayan Parappil Menon , Fatih M. Ozluturk , Leonid Kazakevich
IPC分类号： H04B7/216
CPC分类号： H04W88/005 , H04L12/5692 , H04L12/66 , H04L2012/6481 , H04W88/16 , H04W92/14
摘要： Mobility management in a wireless network having a Radio Access Network Internet Protocol (RAN IP) gateway enabling voice connectivity to the public Internet is provided. The system may serve as a stand-alone system or be incorporated into a UMTS network with a conventional Core Network for providing concurrent wireless telecommunication services for multiple user equipments.
摘要翻译：提供了具有使能到公共因特网的语音连接的无线电接入网络因特网协议（RAN IP）网关的无线网络中的移动性管理。该系统可以用作独立系统，或者与用于为多个用户设备提供同时的无线电信服务的常规核心网络并入UMTS网络中。

4. 发明申请

US20080240259A1 GAIN CONTROL METHOD AND APPARATUS 失效
标题翻译：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。

5. 发明申请

US20080070536A1 METHOD AND APPARATUS FOR ESTIMATING AND CONTROLLING INITIAL TIME SLOT GAIN IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：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。

6. 发明授权

US07336701B2 Method for implementing a communication transceiver impairment emulator 失效
标题翻译：实现通信收发器损伤仿真器的方法
公开(公告)号：US07336701B2
公开(公告)日：2008-02-26
申请号：US10322166
申请日：2002-12-18
申请人： Kenneth P. Kearney , Leonid Kazakevich , Timothy A. Axness , James Nolan
发明人： Kenneth P. Kearney , Leonid Kazakevich , Timothy A. Axness , James Nolan
IPC分类号： H04B17/00
CPC分类号： H04B17/0087 , H04B17/391
摘要： A method for emulating signal impairments to enable dynamic evaluation of transmit and receive modem performance through the use of computer-generated models enabling both an evaluation of system performance as well as a comparison of results obtained from system designs respectively exposed to both impaired and unimpaired conditions to enable direct comparison as well as comparison with standardized measurement values to facilitate system design activities prior to any hardware implementation.
摘要翻译：一种用于模拟信号损伤的方法，以通过使用计算机生成的模型来动态评估发送和接收调制解调器的性能，从而能够对系统性能进行评估，并对从分别暴露于受损和未受损条件的系统设计获得的结果进行比较以实现直接比较以及与标准测量值的比较，以便在任何硬件实施之前促进系统设计活动。

7. 发明申请

US20080020725A1 Digital baseband receiver with DC discharge and gain control circuits 审中-公开
标题翻译：具有直流放电和增益控制电路的数字基带接收器
公开(公告)号：US20080020725A1
公开(公告)日：2008-01-24
申请号：US11904063
申请日：2007-09-25
申请人： Alpaslan Demir , Leonid Kazakevich , Fatih Ozluturk , Geetha Narayan
发明人： Alpaslan Demir , Leonid Kazakevich , Fatih Ozluturk , Geetha Narayan
IPC分类号： H04B7/00
CPC分类号： H04B1/30 , H03D3/008
摘要： A digital baseband (DBB) receiver for receiving and processing a wireless communication signal. The DBB receiver includes at least one low noise amplifier (LNA), at least one demodulator, a direct current (DC) discharge circuit and an LNA control circuit. The LNA selectively amplifies the communication signal. The demodulator outputs analog real and imaginary signal components on real and imaginary signal paths, respectively, in response to receiving the communication signal from the LNA. The DC discharge circuit selectively discharges DC accumulating on at least one of the real and imaginary signal paths. The LNA control circuit turns the LNA on or off.
摘要翻译：一种用于接收和处理无线通信信号的数字基带（DBB）接收机。 DBB接收器包括至少一个低噪声放大器（LNA），至少一个解调器，直流（DC）放电电路和LNA控制电路。 LNA选择性地放大通信信号。解调器响应于接收到来自LNA的通信信号，分别在实信号路径和虚信号路径上输出模拟实信号和虚信号分量。直流放电电路选择性地放电积累在实信号路径和虚信号路径中的至少一个上的DC。 LNA控制电路打开或关闭LNA。

8. 发明授权

US07280812B2 Digital baseband receiver with DC discharge and gain control circuits 失效
标题翻译：具有直流放电和增益控制电路的数字基带接收器
公开(公告)号：US07280812B2
公开(公告)日：2007-10-09
申请号：US10832594
申请日：2004-04-27
申请人： Alpaslan Demir , Leonid Kazakevich , Fatih Ozluturk , Geetha Lakshmi Narayan
发明人： Alpaslan Demir , Leonid Kazakevich , Fatih Ozluturk , Geetha Lakshmi Narayan
IPC分类号： H04B7/00 , H04B7/16 , H04B1/16
CPC分类号： H04B1/30 , H03D3/008
摘要： A digital baseband (DBB) receiver for receiving and processing a wireless communication signal. The DBB receiver includes at least one low noise amplifier (LNA), at least one demodulator, a direct current (DC) discharge circuit and an LNA control circuit. The LNA selectively amplifies the communication signal. The demodulator outputs analog real and imaginary signal components on real and imaginary signal paths, respectively, in response to receiving the communication signal from the LNA. The DC discharge circuit selectively discharges DC accumulating on at least one of the real and imaginary signal paths. The LNA control circuit turns the LNA on or off.
摘要翻译：一种用于接收和处理无线通信信号的数字基带（DBB）接收机。 DBB接收器包括至少一个低噪声放大器（LNA），至少一个解调器，直流（DC）放电电路和LNA控制电路。 LNA选择性地放大通信信号。解调器响应于接收到来自LNA的通信信号，分别在实信号路径和虚信号路径上输出模拟实信号和虚信号分量。直流放电电路选择性地放电积累在实信号路径和虚信号路径中的至少一个上的DC。 LNA控制电路打开或关闭LNA。

9. 发明授权

US07248649B2 Digital baseband receiver including a time domain compensation module for suppressing group delay variation distortion incurred due to analog low pass filter deficiencies 失效
标题翻译：数字基带接收机包括用于抑制由于模拟低通滤波器缺陷而引起的组延迟变化失真的时域补偿模块
公开(公告)号：US07248649B2
公开(公告)日：2007-07-24
申请号：US10749634
申请日：2003-12-31
申请人： Alpaslan Demir , Leonid Kazakevich , Tanbir Haque
发明人： Alpaslan Demir , Leonid Kazakevich , Tanbir Haque
IPC分类号： H03D3/00 , H03K9/06
CPC分类号： H04L27/38 , H04L27/22
摘要： A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB receiver includes a demodulator, first and second analog low pass filters (LPFs), first and second digital gain control circuits, and a digital time domain compensation module which removes group delay variation distortion, introduced by the first and second analog LPFs, from real and imaginary signal components of the communication signal.
摘要翻译：用于接收和处理无线通信信号的数字基带（DBB）射频（RF）接收机。 DBB接收机包括解调器，第一和第二模拟低通滤波器（LPF），第一和第二数字增益控制电路以及数字时域补偿模块，其将由第一和第二模拟LPF引入的群延迟变化失真从通信信号的实信号分量和虚信号。

10. 发明申请

US20070135081A1 PRECISE SLEEP TIMER USING A LOW-COST AND LOW-ACCURACY CLOCK 失效
标题翻译：精密休眠定时器使用低成本和低精度时钟
公开(公告)号：US20070135081A1
公开(公告)日：2007-06-14
申请号：US11678105
申请日：2007-02-23
申请人： Aykut Bultan , John Haim , Leonid Kazakevich
发明人： Aykut Bultan , John Haim , Leonid Kazakevich
IPC分类号： H04B1/16
CPC分类号： H04W52/288 , H04W52/0216 , H04W52/0248 , H04W52/0293 , Y02D70/1242 , Y02D70/24
摘要： A wireless transmit/receive unit (WTRU) uses an oscillator providing accuracy for synchronized communications parameters in an active mode, and operates at reduced power during a discontinuous reception (DRX) mode. A real time clock (RTC) is used as the frequency standard during the reduced power operation, and a frequency adjustment is effected while the RTC is used as the frequency standard. By effecting the frequency adjustment, the RTC is able to be used as the frequency standard for substantial time periods, thereby reducing power consumption of the WTRU during the DRX mode.
摘要翻译：无线发射/接收单元（WTRU）使用振荡器提供在活动模式下的同步通信参数的精度，并且在不连续接收（DRX）模式期间以降低的功率工作。在降低功率运行期间，使用实时时钟（RTC）作为频率标准，并且在使用RTC作为频率标准时进行频率调整。通过进行频率调整，RTC能够用作相当长的时间段的频率标准，从而在DRX模式期间降低了WTRU的功耗。

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