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    • 51. 发明授权
    • Split analog/digital polynomial nonlinear term generator with reduced number of analog-to-digital converters
    • 具有减少数字模数转换器的分离模拟/数字多项式非线性项发生器
    • US08150356B2
    • 2012-04-03
    • US12687113
    • 2010-01-13
    • Edward KeehrSeyed Ali Hajimiri
    • Edward KeehrSeyed Ali Hajimiri
    • H04B1/10
    • H04B1/109
    • A polynomial nonlinear term generator is configured to receive an RF signal. An analog cubic term generator generates an analog cubic term signal and an analog square term generator generates an analog square term signal, both derived from the RF signal. A cubic term mixer assembly mixes a local oscillator (LO) signal with the cubic term signal to generate a synthetic IM3 signal. A square term ADC provides a digital square term signal and a cubic term ADC provides a digital cubic term signal. At least one digital multiplier has a first multiplier input terminal configured to receive a selected one of the digital square term signal and the digital cubic term signal, and a second multiplier input terminal configured to receive the digital square term signal. The multiplier provides as output a digital IMn product where n is greater than 3. A corresponding method is also described.
    • 多项式非线性项发生器被配置为接收RF信号。 模拟三次项发生器产生模拟三次项信号,并且模拟平方项发生器产生从RF信号导出的模拟平方项信号。 立体词混合器组件将本地振荡器(LO)信号与三次项信号混合以产生合成的IM3信号。 平方项ADC提供数字平方项信号,三次项ADC提供数字立方项​​信号。 至少一个数字乘法器具有被配置为接收数字平方项信号和数字三次项信号中所选择的一个的第一乘法器输入端子,以及被配置为接收数字平方项信号的第二乘法器输入端子。 乘数提供n大于3的数字IMn乘积作为输出。还描述了相应的方法。
    • 52. 发明授权
    • Transmitter architecture based on antenna parasitic switching
    • 基于天线寄生切换的发射机架构
    • US08073392B2
    • 2011-12-06
    • US11744278
    • 2007-05-04
    • Aydin BabakhaniDavid B. RutledgeSeyed Ali Hajimiri
    • Aydin BabakhaniDavid B. RutledgeSeyed Ali Hajimiri
    • H04B1/00H04B15/00
    • H04B1/04
    • The invention is a radio transmitter that includes an antenna having at least one driven element and at least one reflector element. The driven element is electrically coupled to a radio carrier source. At least one of the driven elements or the at least one reflector element, includes at least one switch to modulate the radio carrier. Also, a secure communication system includes a radio transmitter configured to transmit a modulated signal within an information beam width. Also, a method for modulating a radio signal includes the steps of causing the transmitted carrier signal to be modulated by the modulation signal in response to switching the at least one reflector switch. Also, a method for selecting desirable antenna reflector switch combinations includes performing a mathematical simulation to determine whether the combination of reflector switch positions results in a modulated signal that can be demodulated within an information beam width.
    • 本发明是一种无线电发射器,其包括具有至少一个从动元件和至少一个反射器元件的天线。 从动元件电耦合到无线电载体源。 驱动元件或至少一个反射器元件中的至少一个包括至少一个调制无线电载体的开关。 此外,安全通信系统包括被配置为在信息波束宽度内发送调制信号的无线电发射机。 此外,一种用于调制无线电信号的方法包括以下步骤:响应于切换至少一个反射器开关,使所发送的载波信号由调制信号进行调制。 此外,用于选择期望的天线反射器开关组合的方法包括执行数学模拟以确定反射器开关位置的组合是否产生可在信息波束宽度内被解调的调制信号。
    • 54. 发明申请
    • DIGITAL AND ANALOG IM3 PRODUCT COMPENSATION CIRCUITS FOR AN RF RECEIVER
    • 数字和模拟IM3 RF射频接收机的产品补偿电路
    • US20110110473A1
    • 2011-05-12
    • US12952237
    • 2010-11-23
    • Edward KeehrSeyed Ali Hajimiri
    • Edward KeehrSeyed Ali Hajimiri
    • H04B1/10
    • H04B1/1018
    • Third-order intermodulation products (IM3) are attenuated in RF receivers by providing a typical main signal path and a parallel auxiliary signal path in which the IM3 products are accentuated, and the output from the main signal path is adaptively filtered to attenuate the IM3 products. In one embodiment, a multirate filter bank (MRFB) with asymmetric analysis and synthesis sections is used to detect and isolate the IM3 products. In another embodiment an analog nonlinear term generator is placed at the front of the auxiliary signal path. The analog nonlinear term generator takes advantage of the nonlinearities of a differential MOSFET circuit and a multiplier to extract the IM3 products in the RF input signal. The outputs of the main signal path and the auxiliary signal path are inputs to a complex least mean squares filter to attenuate the IM3 products in the resulting signal.
    • 三阶互调产物(IM3)通过提供典型的主信号路径和并行辅助信号路径在RF接收机中衰减,其中IM3产品被强调,并且来自主信号路径的输出被自适应滤波以衰减IM3产品 。 在一个实施例中,使用具有不对称分析和合成部分的多速率滤波器组(MRFB)来检测和隔离IM3产品。 在另一个实施例中,模拟非线性项发生器被放置在辅助信号路径的前面。 模拟非线性项发生器利用差分MOSFET电路和乘法器的非线性来提取RF输入信号中的IM3产品。 主信号路径和辅助信号路径的输出是复合最小均方滤波器的输入,以衰减所产生的信号中的IM3乘积。
    • 56. 发明申请
    • INCOMPRESSIBLE RF RECEIVER
    • 不可接收的RF接收器
    • US20100316172A1
    • 2010-12-16
    • US12817109
    • 2010-06-16
    • Edward KeehrSeyed Ali Hajimiri
    • Edward KeehrSeyed Ali Hajimiri
    • H04L27/06H04B1/10
    • H04B1/109H03D7/1458H03D7/1466
    • An incompressible receiver for minimizing undesired higher-order nonlinear distortion products includes a first receiver path configured to receive an input signal having at least one non-baseband frequency. A second receiver path is also configured to receive the input signal. The second receiver path includes at least one odd-order nonlinear distortion reference component and at least one even-order nonlinear distortion reference component. The distortion reference components are configured to be in an “on” state or in an “off” state. A combining element is configured to combine input signals from the first and second receiver paths such that the higher-order nonlinear distortion signals are substantially attenuated at an output of the combining element. An incompressible receiver that has an odd-order nonlinear distortion reference generator including a cubic term and at least one additional term of order greater than 3 and an incompressible receiver front end amplifier (IRFEA) are also described.
    • 用于最小化不期望的更高阶非线性失真产物的不可压缩接收器包括被配置为接收具有至少一个非基带频率的输入信号的第一接收器路径。 第二接收机路径还被配置为接收输入信号。 第二接收机路径包括至少一个奇数阶非线性失真参考分量和至少一个偶次非线性失真参考分量。 失真参考组件被配置为处于“开”状态或处于“关”状态。 组合元件被配置为组合来自第一和第二接收器路径的输入信号,使得较高阶非线性失真信号在组合元件的输出处基本衰减。 还描述了具有奇数阶非线性失真参考生成器的不可压缩接收器,其包括三次项和至少一个额外的大于3的阶数和不可压缩的接收机前端放大器(IRFEA)。
    • 58. 发明申请
    • NOISE SUPPRESSION TECHNIQUES IN HIGH PRECISION LONG-TERM FREQUENCY/TIMING MEASUREMENTS
    • 噪声抑制技术在高精度长期频率/时序测量
    • US20100245100A1
    • 2010-09-30
    • US12710334
    • 2010-02-22
    • Hua WangSeyed Ali HajimiriShouhei Kousai
    • Hua WangSeyed Ali HajimiriShouhei Kousai
    • G08B21/00G01R13/34
    • G01R29/26G01R31/31709
    • A frequency/timing measurement apparatus includes a reference source having a reference source output terminal. At least one target source has a target source output terminal. The at least one target source is communicatively coupled to the reference source. A frequency timing measurement block has a first input terminal electrically coupled to the reference source output terminal. A second input terminal is electrically coupled to the target source output terminal and at least one output terminal. The frequency timing measurement block is configured to perform a noise shaping technique to reduce measurement error attributable to a phase noise that is correlated between the reference source and the target source, and to provide a reduced correlated noise measurement at the at least one output terminal. A method to reduce correlated noise is also described.
    • 频率/定时测量装置包括具有参考源输出端的参考源。 至少一个目标源具有目标源输出端。 至少一个目标源通信地耦合到参考源。 频率定时测量块具有电耦合到参考源输出端的第一输入端。 第二输入端子电耦合到目标源输出端子和至少一个输出端子。 频率定时测量块被配置为执行噪声整形技术以减少归因于在参考源和目标源之间相关的相位噪声的测量误差,并且在至少一个输出端子处提供减小的相关噪声测量。 还描述了一种降低相关噪声的方法。
    • 59. 发明申请
    • DYNAMIC SCALABLE CONCURRENT COMMUNICATION AND MULTI-CORE RECEIVER ARCHITECTURE
    • 动态可量程通讯和多核心接收机架构
    • US20100075622A1
    • 2010-03-25
    • US12564454
    • 2009-09-22
    • Yu-Jiu WangSeyed Ali Hajimiri
    • Yu-Jiu WangSeyed Ali Hajimiri
    • H04B7/12
    • H04B1/30
    • An integrated multi-core RF device includes a common amplifier which outputs an amplified RF signal. A common transmission line is configured to supply the amplified RF signal to a plurality of common transmission line distribution connections. Each receiver core of a plurality of receiver cores has a receiver core RF input coupled to one of the plurality of common transmission line distribution connections. Each core is configured to be tunable to a channel and to output at least one baseband output per channel. The integrated multi-core RF device is configured to concurrently down convert a plurality of channels to corresponding down converted baseband signals. The integrated multi-core RF device is configured to allow dynamic selection of the one or more of the plurality of channels over time. A method to recover a DSCC receiver IC is also described.
    • 集成的多核RF器件包括输出放大的RF信号的公共放大器。 公共传输线被配置为将放大的RF信号提供给多个公共传输线分配连接。 多个接收器核心的每个接收器核心具有耦合到多个公共传输线路分配连接中的一个的接收机核心RF输入。 每个核心被配置为可调谐到通道并且每个通道输出至少一个基带输出。 集成多核RF装置被配置为同时将多个信道同时下变换为相应的下变频基带信号。 集成多核RF设备被配置为允许随时间动态地选择多个信道中的一个或多个。 还描述了恢复DSCC接收机IC的方法。