公开(公告)号：US20120045020A1

公开(公告)日：2012-02-23

申请号：US12859084

申请日：2010-08-18

申请人： Richard W.D. Booth ,  Gregoire Le Grand de Mercey

发明人： Richard W.D. Booth ,  Gregoire Le Grand de Mercey

IPC分类号： H04L27/36

CPC分类号： H04L27/362 ,  H03D7/00 ,  H03F3/24 ,  H03F2200/336

摘要： The digital RF transmitter includes a decoder for receiving the in phase (I) and quadrature (Q) digital baseband signals, a phase generator for generating eight waveforms at a carrier frequency where each phase is a multiple of 45 degrees, a first set of main amplifiers of fixed output power, a second set of auxiliary amplifiers of fixed output power such that the ratio of the voltage amplitudes at the outputs of the second set of auxiliary amplifiers to the voltage amplitudes at the outputs of the first set of main amplifiers is fixed at sqrt(2)−1, and a set of multiplexers for selecting one of the eight carrier waveforms, or an off signal, to transmit to each of the first set of main amplifiers and the second set of auxiliary amplifiers based on both the in phase (I) digital baseband signal and the quadrature (Q) digital baseband signal.

摘要翻译： 数字RF发射机包括用于接收同相（I）和正交（Q）数字基带信号的解码器，相位发生器，用于在每个相位为45度的倍数的载波频率处产生八个波形，第一组主 固定输出功率的放大器，具有固定输出功率的第二组辅助放大器，使得第二组辅助放大器的输出处的电压幅度与第一组主放大器的输出端的电压幅度的比率是固定的 在sqrt（2）-1处，以及一组多路复用器，用于选择八个载波波形中的一个或一个截止信号，以便基于两个内部信号发送到第一组主放大器和第二组辅助放大器中的每一个 （I）数字基带信号和正交（Q）数字基带信号。

公开(公告)号：US20090108951A1

公开(公告)日：2009-04-30

申请号：US12042689

申请日：2008-03-05

申请人： Stephan V. Schell ,  Richard W.D. Booth

发明人： Stephan V. Schell ,  Richard W.D. Booth

IPC分类号： H03K7/02

CPC分类号： H03K7/02 ,  H03F2200/339

摘要： A pulse amplitude modulation (PAM) signal generator that injects a copy of a pulse into the PAM baseband signal prior to frequency upconversion and power amplification. The pulse comprises a function of, or an extra copy of, a pulse in the PAM baseband signal. The pulse injector analyzes the PAM baseband signal for times when a predetermined threshold is exceeded and forms a pulse that is constructed and arranged to reduce the amplitude of the PAM baseband signal to a desired peak amplitude when the pulse is added to the PAM baseband signal.

摘要翻译： 脉冲幅度调制（PAM）信号发生器，其在频率上变频和功率放大之前将脉冲的副本注入到PAM基带信号中。 脉冲包括PAM基带信号中的脉冲的功能或额外的副本。 当超过预定阈值时，脉冲喷射器分析PAM基带信号，并形成一个脉冲，该脉冲被构造和布置成当脉冲被加到PAM基带信号时将PAM基带信号的幅度减小到期望的峰值幅度。

公开(公告)号：US20090257526A1

公开(公告)日：2009-10-15

申请号：US12395981

申请日：2009-03-02

申请人： Hua Wang ,  Paul Cheng-Po Liang ,  Richard W.D. Booth ,  Stephan V. Schell ,  Thomas E. Biedka

发明人： Hua Wang ,  Paul Cheng-Po Liang ,  Richard W.D. Booth ,  Stephan V. Schell ,  Thomas E. Biedka

IPC分类号： H04L27/36

CPC分类号： H04L25/03866

摘要： Methods and apparatus for conditioning communications signals based on detection of high-frequency in the polar domain. High-frequency events detected in a phase-difference component of a complex baseband signal in the polar domain are detected and used as a basis for performing hole-blowing on the complex baseband signal in the quadrature domain and/or nonlinear filtering either or both the magnitude and phase-difference components in the polar domain. Alternatively, high-frequency events detected in the phase-difference signal that correlate in time with low-magnitude events detected in a magnitude component of the complex baseband signal are used as a basis for performing hole-blowing on the complex baseband signal in the quadrature domain and/or nonlinear filtering either or both the magnitude and phase-difference components in the polar domain.

摘要翻译： 基于极区域中高频检测的通信信号调理方法和装置。 检测在极坐标域中的复基带信号的相差分量中检测到的高频事件，并将其用作在正交域中的复基带信号上执行空气吹扫和/或非线性滤波的基础 极化域中的幅度和相位差分量。 或者，在相位差信号中检测到的与在复基带信号的幅度分量中检测到的低幅度事件相关的高频事件被用作在正交中的复基带信号上执行吹空的基础 域和/或非线性滤波极化域中的幅度和相位差分量之一或二者。

公开(公告)号：US20080299919A1

公开(公告)日：2008-12-04

申请号：US12122610

申请日：2008-05-16

申请人： Matthew Mow ,  Richard W.D. Booth

发明人： Matthew Mow ,  Richard W.D. Booth

IPC分类号： H04B1/02

CPC分类号： H04B1/0483 ,  H03F1/02 ,  H03F3/24 ,  H04B2001/045

摘要： A communications transmitter having a main transmit chain for main signal features and one or more auxiliary transmit chains for auxiliary signal enhancements. In one embodiment, a communications signal is produced by digitally processing a representation of a desired signal so as to limit a trajectory of a signal represented by a resulting processed signal. A digital representation of a difference signal approximating a difference between the processed signal and the desired signal is produced. A first modulated, amplified signal is produced in dependence on the processed signal, and a second modulated, amplified signal is produced in response to the difference signal. The first modulated, amplified signal and the second modulated, amplified signal are combined to produce the desired signal. In this manner, a main transmit chain may be optimized with respect to other properties than signal quality (e.g., power efficiency), while one or more auxiliary transmit chains may be used to enhance the signal quality of the final signal.

摘要翻译： 具有用于主信号特征的主发射链和用于辅助信号增强的一个或多个辅助发射链的通信发射机。 在一个实施例中，通过数字处理期望信号的表示来产生通信信号，以限制由所得到的处理信号表示的信号的轨迹。 产生近似处理信号和期望信号之间的差的差分信号的数字表示。 根据经处理的信号产​​生第一调制的放大信号，并且响应于差分信号产生第二调制的放大信号。 第一调制放大信号和第二调制放大信号被组合以产生所需信号。 以这种方式，可以相对于信号质量（例如，功率效率）的其他属性来优化主发射链，而一个或多个辅助发射链可以用于增强最终信号的信号质量。