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    Method, system and apparatus for balanced frequency up-conversion of a baseband signal
    8.
    发明授权
    Method, system and apparatus for balanced frequency up-conversion of a baseband signal 有权
    用于基带信号平衡上变频的方法，系统和装置

    公开(公告)号：US08571135B2

    公开(公告)日：2013-10-29

    申请号：US13323550

    申请日：2011-12-12

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

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

    CPC分类号： H04B1/0475 ,  H03C3/40 ,  H03D3/006 ,  H03D7/00 ,  H04L25/03

    摘要： A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the baseband signal in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the baseband signal. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal. The sampling modules that perform the sampling can be configured in either a series or a shunt configuration. In embodiments of the invention, DC offset voltages are minimized between the sampling modules to minimize or prevent carrier insertion into the harmonic images.

    摘要翻译： 平衡发射机直接从基带到RF RF转换基带信号。 上转换过程是足够的线性，即使在对频谱增长有严格要求的通信应用中也不需要IF处理。 在运行中，平衡调制器以平衡和差分的方式对基带信号进行子谐波采样，从而产生谐波丰富的信号。 谐波丰富的信号包含以抽样频率的倍数重复的多个谐波图像，其中每个谐波包含必要的信息以重构基带信号。 根据相对于彼此相移的第一和第二控制信号执行差分采样。 在本发明的实施例中，控制信号具有脉冲宽度（或孔径），其操作以改善在谐波丰富信号中的期望谐波的能量传递。 然后可以利用带通滤波器从谐波丰富的信号中选择所需要的谐波。 执行采样的采样模块可以以串联或分流配置进行配置。 在本发明的实施例中，采样模块之间的DC偏移电压最小化，以最小化或防止载波插入到谐波图像中。

    Method and system for down-converting an electromagnetic signal, and transforms for same
    10.
    发明授权
    Method and system for down-converting an electromagnetic signal, and transforms for same 有权
    用于下变频电磁信号的方法和系统，并对其进行转换

    公开(公告)号：US08223898B2

    公开(公告)日：2012-07-17

    申请号：US12776173

    申请日：2010-05-07

    申请人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses, Jr. ,  Gregory S. Rawlins ,  Michael W. Rawlins

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H03D7/00

    摘要： Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.

    摘要翻译： 本文描述了用于电磁（EM）信号的下变频的方法，系统和装置，以及其组合和子组合。 简言之，在实施例中，本发明通过接收EM信号并且在载波信号的近似半周期（½，1½，2½等）上递归地操作）来操作。 可以以载波信号的次谐波速率执行递归运算。 本发明积累了递归运算的结果，并使用累加结果形成降频转换信号。 在一个实施例中，EM信号被下变频到中频（IF）信号。 在另一个实施例中，EM信号被下变频为基带信息信号。 在另一个实施例中，EM信号是频率调制（FM）信号，其被下变频成非FM信号，例如相位调制（PM）信号或幅度调制（AM）信号。