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81. 发明授权

US07280618B2 Digital baseband receiver including a high pass filter compensation module for suppressing group delay variation distortion incurred due to analog high pass filter deficiencies 失效
标题翻译：数字基带接收机包括一个高通滤波器补偿模块，用于抑制由于模拟高通滤波器缺陷而引起的群延迟变化失真
公开(公告)号：US07280618B2
公开(公告)日：2007-10-09
申请号：US10747644
申请日：2003-12-29
申请人： Alpaslan Demir , Leonid Kazakevich , Tanbir Haque
发明人： Alpaslan Demir , Leonid Kazakevich , Tanbir Haque
IPC分类号： H03D3/00
CPC分类号： H03D3/009
摘要： A digital baseband (DBB) radio frequency (RF) receiver includes a digital high pass filter compensation (HPFC) module used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFs) in the receiver. The digital HPFC module reduces a cutoff frequency, established by the HPFs for the real and imaginary signal component frequency domain responses by providing a first compensation signal having a first predetermined value (K1). The digital HPFC module adjusts the gain of the high pass response of the real and imaginary signal component frequency domains by providing a second compensation signal having a second predetermined value (K2).
摘要翻译：数字基带（RFB）射频接收机包括数字高通滤波器补偿（HPFC）模块，用于抑制在接收机中使用低成本模拟高通滤波器（HPF）引起的群延迟变化失真。数字HPFC模块通过提供具有第一预定值（K SUB> 1）的第一补偿信号来减少由HPF为实信号分量和虚信号分量频域响应建立的截止频率。数字HPFC模块通过提供具有第二预定值（K 2> 2）的第二补偿信号来调整实信号分量频域和虚信号分量频域的高通响应的增益。

82. 发明申请

US20070091865A1 Communication station having an improved antenna system 审中-公开
标题翻译：具有改进的天线系统的通信站
公开(公告)号：US20070091865A1
公开(公告)日：2007-04-26
申请号：US11607484
申请日：2006-12-01
申请人： Gary Lomp , Leonid Kazakevich , Jeffrey Polan , David Mesecher
发明人： Gary Lomp , Leonid Kazakevich , Jeffrey Polan , David Mesecher
IPC分类号： H04B7/216
CPC分类号： H04B7/0894 , H04J13/00 , H04W52/52
摘要： A communication station includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by the antenna system. The combined signal is in turn processed by a modem, which compensates for the known distortion in a manner which provides improved signal gain. The improved signal gain permits a reduction in transmit power and, accordingly, increased capacity of the communication station. Where the antenna system is to be remotely located from related signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along with the antenna system.
摘要翻译：通信站包括具有多个天线的天线系统和用于接收发送信号的延迟单元，并输出具有由天线系统赋予的已知失真的组合信号。组合的信号又由调制解调器进行处理，调制解调器以提供改善的信号增益的方式补偿已知的失真。改进的信号增益允许传输功率的降低，并因此降低通信站的容量。在天线系统要远离相关信号处理设备的地方，RF接收机/发射机和其他信号处理设备的单独单元被提供，使得RF接收机/发射机也可以与天线系统一起远程定位。

83. 发明授权

US07197341B2 Precise sleep timer using a low-cost and low-accuracy clock 失效
标题翻译：使用低成本和低精度时钟的精确睡眠定时器
公开(公告)号：US07197341B2
公开(公告)日：2007-03-27
申请号：US11000285
申请日：2004-11-30
申请人： Aykut Bultan , John W. Haim , Leonid Kazakevich
发明人： Aykut Bultan , John W. Haim , Leonid Kazakevich
IPC分类号： H04B1/38
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。

84. 发明授权

US07162218B2 System and method for a direct conversion multi-carrier processor 有权
标题翻译：直接转换多载波处理器的系统和方法
公开(公告)号：US07162218B2
公开(公告)日：2007-01-09
申请号：US10456300
申请日：2003-06-06
申请人： Timothy A. Axness , Leonid Kazakevich
发明人： Timothy A. Axness , Leonid Kazakevich
IPC分类号： H04B1/26 , H04B1/38
CPC分类号： H04L5/06 , H03G3/3052 , H04B1/30 , H04L27/2608 , H04L27/3845
摘要： A radio communications device such as a receiver, transmitter or transceiver provides direct conversion of quadrature signals between a radio frequency signal and a plurality of resolved channels. The device provides block processing of multiple RF carriers in a wireless communication system using a direct conversion transmitter/receiver and baseband signal processing.
摘要翻译：诸如接收机，发射机或收发机之类的无线电通信设备在射频信号和多个解决的信道之间提供正交信号的直接转换。该设备使用直接转换发射机/接收机和基带信号处理在无线通信系统中提供多个RF载波的块处理。

85. 发明申请

US20060166630A1 Dynamic bias for RF power amplifiers 失效
公开(公告)号：US20060166630A1
公开(公告)日：2006-07-27
申请号：US11368802
申请日：2006-03-06
申请人： Leonid Kazakevich , Patrick Cabrol
发明人： Leonid Kazakevich , Patrick Cabrol
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H03F1/0222 , H03F1/02 , H03F1/0205 , H03F1/0233 , H03F1/0261 , H03F1/0266 , H03F1/30 , H03F3/24 , H03F2200/451 , H03F2200/474 , H03G3/3042 , H03G3/3084 , H04B2001/0416 , H04B2001/045 , H04W52/08 , H04W52/52
摘要： A method for wireless communication that dynamically adjusts RF amplifier operating bias for the subscriber unit's transmitter in response to a power control signal. The invention provides high-efficiency RF power amplification for applications where the available power source is limited. The invention uses a power control signal resident in wireless communication system architectures with a detector and voltage to current converter to arrive at a dynamic amplifier operating bias.

86. 发明申请

US20060133546A1 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：US20060133546A1
公开(公告)日：2006-06-22
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： H04L27/08
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。

87. 发明授权

US07050418B2 Modem for processing CDMA signals 有权
公开(公告)号：US07050418B2
公开(公告)日：2006-05-23
申请号：US10417384
申请日：2003-04-16
申请人： Gary R. Lomp , Leonid Kazakevich , Jeffrey S. Polan , David K. Mesecher
发明人： Gary R. Lomp , Leonid Kazakevich , Jeffrey S. Polan , David K. Mesecher
IPC分类号： H04B7/216
CPC分类号： H04B7/0894 , H04J13/00 , H04W52/52
摘要： A modem is configured for demodulating a communication signal associated with a unique code-division multiple access (CDMA) code. The modem includes an adaptive matched filter and a vector correlator. The vector correlator generates filter coefficients for the adaptive matched filter based on signal distortion determined by the vector correlator. The vector correlator has a processing capacity of at least eleven chips whereby the vector correlator compensates for a known phase distortion and for multipath distortion ascertainable within its processing capacity. The adaptive matched filter processes communication signals with the unique CDMA code using coefficients generated by the vector correlator.

88. 发明申请

US20060057980A1 Transmitter circuit with modulated power amplifier bias control based on RF carrier envelope tracking 审中-公开
标题翻译：基于RF载波包络跟踪的调制功率放大器偏置控制的发射机电路
公开(公告)号：US20060057980A1
公开(公告)日：2006-03-16
申请号：US11195887
申请日：2005-08-03
申请人： Tanbir Haque , Leonid Kazakevich
发明人： Tanbir Haque , Leonid Kazakevich
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H03F1/0272 , H03F1/02 , H03F1/0238 , H03F3/24 , H03F3/245 , H03F2200/435 , H04B1/0475 , H04B2001/045
摘要： The present invention is a transmitter circuit in which envelope tracking of a power amplifier output is used to derive its power supply modulation. The circuit includes a power amplifier for amplifying an RF signal, a voltage power source and a switching amplifier for producing a modulated output responsive to the envelope of the amplified RF signal. The transmitter circuit further comprises a peak detector that eliminates the transmit carrier signal in the power supply modulation signal. A fraction of the PA output is utilized by the switching amplifier and the peak detector to produce a signal that follows the baseband signal envelope and is used to modulate the bias of the power amplifier.
摘要翻译：本发明是一种发射机电路，其中使用功率放大器输出的包络跟踪来导出其电源调制。电路包括用于放大RF信号的功率放大器，电压电源和开关放大器，用于响应于放大的RF信号的包络产生调制的输出。发射机电路还包括消除电源调制信号中的发射载波信号的峰值检测器。开关放大器和峰值检测器利用PA输出的一小部分产生跟随基带信号包络的信号，并用于调制功率放大器的偏置。

89. 发明授权

US07013257B1 Communication transmission impairment emulator 失效
标题翻译：通信传输损耗仿真器
公开(公告)号：US07013257B1
公开(公告)日：2006-03-14
申请号：US09712888
申请日：2000-11-15
申请人： James Nolan , Leonid Kazakevich , Fryderyk Tyra , Robert Regis , Fred Schreider
发明人： James Nolan , Leonid Kazakevich , Fryderyk Tyra , Robert Regis , Fred Schreider
IPC分类号： G06F9/455
CPC分类号： H04B17/0087
摘要： A communication system emulator digitally emulates a plurality of signal impairments created by the transmitter and receiver components and communication medium in a typical communication system, for use in evaluating and refining modem design. A variety of linear and non-linear distortion characteristics are impressed on baseband signals between modulators and demodulators to evaluate and refine modem performance without requiring transmission frequency components or communication channel. The emulator comprises transmit modules, receive modules and communication media modules, and can accept or output analog or digital signals. Each module is configurable to allow modeling of simplex or duplex communication, or a common base station with multiple users transmitting or receiving, all configurations with or without communication media impairment emulation. Each module can be configured to add a plurality of linear and non-linear impairments to a baseband signal.
摘要翻译：通信系统仿真器在典型的通信系统中数字地仿真由发射机和接收机组件和通信介质创建的多个信号损伤，用于评估和完善调制解调器设计。在调制器和解调器之间的基带信号上施加了各种线性和非线性失真特性，以评估和优化调制解调器性能，而不需要传输频率分量或通信信道。仿真器包括发射模块，接收模块和通信媒体模块，并且可以接收或输出模拟或数字信号。每个模块都可配置为允许对单通道或双工通信进行建模，或者是具有多个用户发送或接收的所有配置的通用介质损伤仿真的所有配置。每个模块可以被配置为向基带信号添加多个线性和非线性损伤。

90. 发明申请

US20050233713A1 Method and system for compensating for phase variations caused by transmitter activation 失效
标题翻译：用于补偿由发射器激活引起的相位变化的方法和系统
公开(公告)号：US20050233713A1
公开(公告)日：2005-10-20
申请号：US10863977
申请日：2004-06-09
申请人： Leonid Kazakevich , Tanbir Haque , Alpaslan Demir , Robert Troiano
发明人： Leonid Kazakevich , Tanbir Haque , Alpaslan Demir , Robert Troiano
IPC分类号： H03C1/62 , H03F1/02 , H03F1/06 , H03F1/14 , H03F1/30 , H03F3/24 , H04B1/04
CPC分类号： H03F3/24 , H03F1/0205 , H03F1/0211 , H03F1/14 , H03F1/305 , H03F2200/336
摘要： A method and apparatus that reduces the amount of constellation rotation due to power amplifier (PA) insertion phase variation during activation (i.e., turn on) of a transmitter. This is accomplished by applying an instantaneous phase rotation during the transmitter turn on at digital baseband to counteract and minimize unwanted phase variations.
摘要翻译：一种减少由于功率放大器（PA）在发射机的激活（即导通）期间插入相位变化引起的星座旋转量的方法和装置。这是通过在发射机在数字基带处接通时施加瞬时相位旋转来实现的，以抵消并最小化不期望的相位变化。

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