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1.发明授权公开(公告)号：US06707863B1
公开(公告)日：2004-03-16
申请号：US09305139
申请日：1999-05-04
IPC分类号： H03D324
CPC分类号： H04L27/3827 , H04L27/3809
摘要： A multidetector (40) circuit for use in a plurality of carrier recovery systems (10, 70) for recovery for a suppressed carrier modulated signal. The multidetector (40) receives demodulated, in-phase x and quadrature phase y components of a baseband signal (sn(t)) and generates output signals for use in a plurality of carrier recovery systems (10, 70). The multidetector (40) generates a lock detection signal that varies primarily in accordance with a lock signal x2y2 and a fourth-order amplitude detection signal (x2+y2)2 for use in either system. The multidetector particularly generates a phase error signal xy(x2−y2) for use in a Costas carrier recovery system (10). The multidetector also generates a second-order amplitude detection signal (x2+y2) for use in either system which can be used to adjust the amplitude of the incoming, modulated signal in order to control the loop gain of the carrier recovery phase locked loop.
摘要翻译： 一种用于多个载波恢复系统（10,70）中用于恢复被抑制的载波调制信号的多检测器（40）电路。 多检测器（40）接收基带信号（sn（t））的解调的同相x和正交相位y分量，并产生用于多个载波恢复系统（10,70）的输出信号。 多检测器（40）产生主要根据锁定信号x 2 y 2和四阶振幅检测信号（x 2 + y 2）<2>而变化的锁定检测信号，用于 在任一系统中使用。 多检测器特别产生用于科斯塔斯载波恢复系统（10）中的相位误差信号xy（x 2 -y 2）。 多检测器还产生用于任一系统的二阶振幅检测信号（x 2 + y 2），该信号可用于调节输入调制信号的振幅，以便控制 载波恢复锁相环。
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公开(公告)号：US4622683A
公开(公告)日：1986-11-11
申请号：US670440
申请日：1984-11-08
申请人： Jack K. Basham , Kenton T. T. Ho , Eric M. Mrozek
发明人： Jack K. Basham , Kenton T. T. Ho , Eric M. Mrozek
IPC分类号： H04L7/027 , H04L27/18 , H04L27/227 , H04L27/14
CPC分类号： H04L27/2276 , H04L7/0272 , H04L7/0278
摘要： A clock and carrier recovery circuit, and a related method, for use in a minimum shift keying (MSK) receiver demodulator. The clock and carrier recovery circuit uses ringing filters to lock onto two frequency-doubled tone components of a received MSK signal. A signal having the same frequency as the clock is recovered by taking the difference of the outputs of the two filters. The output of each filter is then combined separately with a signal having a frequency to produce to signals, each having a frequency equal to twice the carrier frequency and having complementary amplitude modulation. These two signals are summed to cancel the amplitude modulation and the resulting sum signal, having constant amplitude and a frequency twice that of the carrier, is divided by two to recover the carrier signal.
摘要翻译： 时钟和载波恢复电路以及相关方法，用于最小移位键控（MSK）接收机解调器。 时钟和载波恢复电路使用振铃滤波器锁定接收到的MSK信号的两个倍频音调分量。 通过取两个滤波器的输出的差来恢复具有与时钟相同频率的信号。 然后将每个滤波器的输出与具有频率的信号分开组合以产生信号，每个信号具有等于载波频率的两倍的频率并具有互补幅度调制。 将这两个信号相加以消除幅度调制，并将具有恒定幅度和载波两倍频率的结果和信号除以2以恢复载波信号。
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公开(公告)号：US07193486B2
公开(公告)日：2007-03-20
申请号：US11038354
申请日：2005-01-19
申请人： Eric M. Mrozek , Flavia S. Fong , Mark Kintis
发明人： Eric M. Mrozek , Flavia S. Fong , Mark Kintis
摘要： A comb frequency generator that is tunable to vary the width of the pulses in the output signal and achieve a maximum power output at different harmonic frequencies. A wavefront compression device receives a sinusoidal input signal and provides wavefront compression to create a compressed signal having a series of periodic fast edges. A delay device receives the fast-edge compressed signal and delays the fast-edge signal to create a delayed fast-edge signal. A combining device receives the original fast-edge compressed signal and the delayed fast-edge compressed signal to generate an output signal including a series of pulses having a width determined by the delay of the delayed signal. In one embodiment, the delay device is a shorted transmission line stub having a length selectively set by a series of MEM devices. In another embodiment, the delay device is an NLTL variable time delay device that delays the fast-edge signal.
摘要翻译： 梳状频率发生器，可调谐以改变输出信号中的脉冲宽度，并实现不同谐波频率下的最大功率输出。 波前压缩装置接收正弦输入信号并提供波前压缩以产生具有一系列周期性快速边缘的压缩信号。 延迟装置接收快速边缘压缩信号并延迟快速边缘信号以产生延迟的快速边缘信号。 组合装置接收原始快速边缘压缩信号和延迟的快速边缘压缩信号，以产生包括具有由延迟信号的延迟确定的宽度的一系列脉冲的输出信号。 在一个实施例中，延迟装置是具有由一系列MEM装置选择性地设置的长度的短路传输线短截线。 在另一个实施例中，延迟装置是延迟快速边缘信号的NLTL可变时间延迟装置。
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