公开(公告)号：US07003058B2

公开(公告)日：2006-02-21

申请号：US10086127

申请日：2002-02-27

申请人： Susan E. Bach ,  Kurt W. Loheit ,  Remy O. Hiramoto

发明人： Susan E. Bach ,  Kurt W. Loheit ,  Remy O. Hiramoto

IPC分类号： H04D1/04 ,  H03D1/06 ,  H03K5/01 ,  H04B1/10 ,  H04L1/00

CPC分类号： H04B1/525 ,  H04J15/00

摘要： A telecommunication system includes a transmitter configured to modulate a forward link RF carrier with a first set of data; a receiver configured to demodulate a second set of data from a return link RF carrier; an orthomode transducer having two linear ports and a circular waveguide port, where one of the linear ports is connected as an input from the transmitter and another linear port is simultaneously connected as an output to the receiver; an antenna; and a linear-to-circular polarizer connected to the circular waveguide port and connected to the antenna, where the linear-to-circular polarizer is configured so that a first linear polarization at the circular waveguide port results in a first circular polarization at the antenna and a second circular polarization at the antenna results in a second linear polarization at the circular waveguide port.

公开(公告)号：US06674326B1

公开(公告)日：2004-01-06

申请号：US10174423

申请日：2002-06-17

申请人： Remy O. Hiramoto ,  Susan E. Bach ,  Suzanne E. Kubasek ,  Thomas Cooper

发明人： Remy O. Hiramoto ,  Susan E. Bach ,  Suzanne E. Kubasek ,  Thomas Cooper

IPC分类号： H03F126

CPC分类号： H03F3/58 ,  H03F1/3223

摘要： A digitally controllable nonlinear pre-equalizer system receiving an input signal and generating an output signal, the system including a splitter for dividing the input signal into a first signal path and a second signal path, an attenuator and a time delay element in the first signal path, the attenuator and the time delay element operable to generate a linear signal, a mixer and a vector modulator in the second signal path, the mixer being responsive to a signal from a digital to analog converter coupled to a processor chip providing a digital signal to the digital to analog converter, the mixer and vector modulator operable to generate a nonlinear signal, and a summer for summing the linear signal and the nonlinear signal to generate the output signal.

摘要翻译： 数字可控非线性预均衡器系统接收输入信号并产生输出信号，所述系统包括用于将输入信号分成第一信号路径和第二信号路径的分路器，第一信号中的衰减器和时间延迟元件 所述衰减器和所述延迟元件可操作以在所述第二信号路径中产生线性信号，混频器和矢量调制器，所述混频器响应于耦合到处理器芯片的数模转换器的信号，所述处理器芯片提供数字信号 数字到模拟转换器，混合器和向量调制器可操作以产生非线性信号，以及加法器，用于对线性信号和非线性信号求和以产生输出信号。

公开(公告)号：US07065153B2

公开(公告)日：2006-06-20

申请号：US10071954

申请日：2002-02-06

申请人： Susan E. Bach ,  Kurt W. Loheit ,  Remy O. Hiramoto ,  Daniel H. Koyama ,  Suzanne E. Kubasek ,  Craig Schulz

发明人： Susan E. Bach ,  Kurt W. Loheit ,  Remy O. Hiramoto ,  Daniel H. Koyama ,  Suzanne E. Kubasek ,  Craig Schulz

IPC分类号： H04L27/04 ,  H04L27/12 ,  H04L27/20

CPC分类号： H04L27/362 ,  H04L27/2064

摘要： In a system for modulating an RF carrier, the RF carrier is fed through a lowpass filter and phase shifted approximately −90 degrees. The RF carrier is also fed through a high pass filter and phase shifted approximately +90 degrees. A switch connected to the output of the lowpass filter and connected to the output of the highpass filter, selects and outputs either the −90 degree phase shifted carrier output from the lowpass filter or the +90 degree phase shifted carrier output from the highpass filter depending on a switching state determined by data bit information received at a data port to produce a BPSK modulated RF carrier. Two such BPSK modulators may be combined using lowpass and highpass filters to form a QPSK modulator. Two such QPSK modulators may be combined with an attenuator to form a QAM modulator.

摘要翻译： 在用于调制RF载波的系统中，RF载波馈送通过低通滤波器并且相差大约-90度。 RF载波也通过高通滤波器馈电，相移大约+90度。 连接到低通滤波器的输出并连接到高通滤波器的输出的开关，选择并输出从低通滤波器输出的-90度相移载波或从高通滤波器输出的+90度相移载波 在由在数据端口处接收的数据比特信息确定的切换状态下产生BPSK调制的RF载波。 两个这样的BPSK调制器可以使用低通和高通滤波器组合以形成QPSK调制器。 两个这样的QPSK调制器可以与衰减器组合以形成QAM调制器。