公开(公告)号：US08300728B1

公开(公告)日：2012-10-30

申请号：US12284726

申请日：2008-09-24

申请人： Theodore J. Hoffmann ,  David W. Cripe

发明人： Theodore J. Hoffmann ,  David W. Cripe

IPC分类号： H03C3/00

CPC分类号： H03C3/40 ,  H03C5/00 ,  H03C2200/0058

摘要： The invention is a method of transmitting a radio signal using a complex envelope elimination and restoration technique. The method includes receiving a radio frequency (RF) signal. Further, the method includes separating the RF signal into an in-phase baseband signal (I) and a quadrature baseband signal (Q). Still further, the method includes decomposing the (I) signal into a in-phase magnitude component and a in-phase phase component while decomposing the Q signal into a quadrature magnitude component and a quadrature phase component. Alternatively, the source signal could be digital baseband information. Digital signal processing could generate the phase and magnitude reference signals for the system.

摘要翻译： 本发明是一种使用复信封消除和恢复技术发送无线电信号的方法。 该方法包括接收射频（RF）信号。 此外，该方法包括将RF信号分离为同相基带信号（I）和正交基带信号（Q）。 此外，该方法包括将（I）信号分解为同相幅度分量和同相相位分量，同时将Q信号分解成正交幅度分量和正交相位分量。 或者，源信号可以是数字基带信息。 数字信号处理可以产生系统的相位和幅度参考信号。

公开(公告)号：US07605757B1

公开(公告)日：2009-10-20

申请号：US11809239

申请日：2007-05-31

申请人： David A. Gribble ,  Theodore J. Hoffmann ,  Jerzy K. Richter ,  Roger A Dana ,  Shannon D. Hauerwas

发明人： David A. Gribble ,  Theodore J. Hoffmann ,  Jerzy K. Richter ,  Roger A Dana ,  Shannon D. Hauerwas

IPC分类号： G01S1/00 ,  G01S13/00

CPC分类号： G01S1/46 ,  G01S1/045 ,  H04B1/0007

摘要： The present invention is an apparatus and method for simultaneously processing multiple communication and navigation signals. An apparatus of the present invention may comprise a single receiver with a direct radio frequency (RF) sampling front end, a single analog to digital converter, a digital downconverter and a digital signal processor. In an embodiment of the invention, the receiver of the present invention may simultaneously process navigation signals in the 108-118 MHz band and communication signals in the 118-137 MHz band.

摘要翻译： 本发明是用于同时处理多个通信和导航信号的装置和方法。 本发明的装置可以包括具有直接射频（RF）采样前端的单个接收器，单个模数转换器，数字下变频器和数字信号处理器。 在本发明的实施例中，本发明的接收机可以同时处理108-118MHz频带中的导航信号和118-137MHz频带中的通信信号。

公开(公告)号：US07039385B1

公开(公告)日：2006-05-02

申请号：US10452887

申请日：2003-06-02

申请人： Theodore J. Hoffmann ,  Mark M. Mulbrook

发明人： Theodore J. Hoffmann ,  Mark M. Mulbrook

IPC分类号： H04B1/16

CPC分类号： H04B1/1036

摘要： A radio has a tunable bandpass filter that is tuned by apparatus within the radio. A reference generator generates a reference signal for use in tuning the tunable bandpass filter. The tunable bandpass filter receives the reference signal and provides a filter output signal. A digital signal processing and control processor is connected to the tunable bandpass filter to receive the filter output signal. The digital signal processing and control processor has a phase comparison function that provides a phase error metric from the filter output signal. The digital signal processing and control processor tunes the tunable bandpass filter to provide a desired phase error metric signal thereby tuning the tunable bandpass filter to the desired center frequency. The digital signal processing and control processor stores tunable filter parameters for the desired center frequency. The tuning process may be repeated for several desired center frequencies of the tunable bandpass filter.

摘要翻译： 无线电装置具有可调谐带通滤波器，其由无线电装置调谐。 参考发生器产生用于调谐可调谐带通滤波器的参考信号。 可调谐带通滤波器接收参考信号并提供滤波器输出信号。 数字信号处理和控制处理器连接到可调谐带通滤波器以接收滤波器输出信号。 数字信号处理和控制处理器具有从滤波器输出信号提供相位误差度量的相位比较功能。 数字信号处理和控制处理器调谐可调谐带通滤波器以提供期望的相位误差度量信号，从而将可调谐带通滤波器调谐到期望的中心频率。 数字信号处理和控制处理器存储所需中心频率的可调滤波器参数。 对于可调谐带通滤波器的几个期望的中心频率，可以重复调谐过程。

公开(公告)号：US09137067B1

公开(公告)日：2015-09-15

申请号：US14109377

申请日：2013-12-17

申请人： Chenggang Xie ,  Theodore J. Hoffmann ,  Anders P. Walker

发明人： Chenggang Xie ,  Theodore J. Hoffmann ,  Anders P. Walker

IPC分类号： H04L27/20 ,  H04B7/00 ,  H03F3/24 ,  H04B1/02

CPC分类号： H04L27/20 ,  H03F1/0294 ,  H03F3/195 ,  H03F3/211 ,  H03F3/24 ,  H03F3/245 ,  H03F3/68 ,  H04B1/02 ,  H04B1/0483 ,  H04B7/00

摘要： High efficiency transmitters for electronically scanned arrays (also known as electronically steered antennas or ESAs) are disclosed. The transmitters in accordance with the present disclosure utilize outphasing power amplification. In one embodiment, the outphasing transmitter includes a phase shifting device. The phase shifting device is configured for phase shifting an input signal and providing a pair of phase shifted signals for each emitting element of the EAS. The outphasing transmitter also includes an outphasing power amplifier associated with each emitting element. Each outphasing power amplifier is configured for separately amplifying the pair of shifted signals for each emitting element and combining the separately amplified signals for each emitting element for transmission.

摘要翻译： 公开了用于电子扫描阵列（也称为电子导向天线或ESA）的高效发射机。 根据本公开的发射机利用了外部功率放大。 在一个实施例中，旁相变送器包括相移装置。 相移装置被配置为对输入信号进行相移，并为EAS的每个发射元件提供一对相移信号。 外相发射机还包括与每个发射元件相关联的外接功率放大器。 每个旁相功率放大器被配置为分别放大每个发射元件的一对移位信号，并且组合用于每个发射元件的单独放大的信号用于传输。