公开(公告)号：US08649688B2

公开(公告)日：2014-02-11

申请号：US13016161

申请日：2011-01-28

申请人： Douglas L. McGhan ,  Ian B. Betty

发明人： Douglas L. McGhan ,  Ian B. Betty

IPC分类号： H04B10/04

CPC分类号： H04L27/2089 ,  H04L27/2028 ,  H04L27/2096

摘要： The present disclosure provides Radio Frequency (RF) drive level control systems and methods for an Electro-Optic (EO) M-ary Phase-Shift Keying (M-PSK) phase modulator. Specifically, an M-PSK drive waveform is tightly controlled for maximum symmetry in the associated constellation. In an exemplary embodiment, the present disclosure includes an M-PSK transmitter, an M-PSK electro-optic phase modulator, and phase modulation method that each control RF drive level based upon a carrier suppression ratio defined as a measure of ratio of a modulated time-averaged E-field to the magnitude of the E-field. In an exemplary embodiment, the carrier suppression ratio is measured based on a modulation depth measurement.

摘要翻译： 本公开提供了用于电光（EO）M相移键控（M-PSK）相位调制器的射频（RF）驱动电平控制系统和方法。 具体地说，M-PSK驱动波形被紧密地控制在相关星座中的最大对称性。 在一个示例性实施例中，本公开包括M-PSK发射机，M-PSK电光相位调制器和相位调制方法，其中每个控制RF驱动电平基于载波抑制比定义为调制的比率的量度 时间平均的电场到电场的幅度。 在示例性实施例中，基于调制深度测量来测量载波抑制比。

公开(公告)号：US5446760A

公开(公告)日：1995-08-29

申请号：US937001

申请日：1992-08-31

申请人： Richard A. Bienz ,  Daniel J. Morelli

发明人： Richard A. Bienz ,  Daniel J. Morelli

IPC分类号： H04L25/03 ,  H04L27/20 ,  H04L27/04 ,  H04L27/12

CPC分类号： H04L27/2028 ,  H04L25/03866

摘要： A digital pulse shaping and phase modulation network is used for reducing out-of-band spectral energy. This network is used in conjunction with a NCO (numerically controlled oscillator) which includes a linear phase input port. This circuit converts rectangular data pulses into a user programmed shape. The shape pulses are then modulated onto the carrier via the linear phase port. Depending on the preprogrammed pulse shape, the out-of-band spectral energy is significantly reduced.

摘要翻译： 数字脉冲整形和相位调制网络用于降低带外频谱能量。 该网络与包括线性相位输入端口的NCO（数控振荡器）结合使用。 该电路将矩形数据脉冲转换为用户编程的形状。 形状脉冲然后通过线性相位端口调制到载体上。 根据预编程的脉冲形状，带外频谱能量显着降低。

公开(公告)号：US20080159438A1

公开(公告)日：2008-07-03

申请号：US11961987

申请日：2007-12-20

申请人： Joseph M. Kulinets ,  Peter R. Nuytkens

发明人： Joseph M. Kulinets ,  Peter R. Nuytkens

IPC分类号： H04L27/12 ,  H03C3/00

CPC分类号： H03C3/0925 ,  H03C3/0933 ,  H04L25/03866 ,  H04L27/12 ,  H04L27/2028

摘要： Methods and apparatus for signal transmission utilizing directly modulated frequency shift keying. Embodiments of the present invention provide a fractional (non-integer) N oscillator to directly modulate a baseband signal for transmission using a programmable digital raised cosine generator, providing a tunable Gaussian FSK transmitter.

摘要翻译： 利用直接调制频移键控的信号传输方法和装置。 本发明的实施例提供了一种分数（非整数）N个振荡器，用于使用可编程数字升余弦发生器直接调制用于传输的基带信号，从而提供可调高斯FSK发射机。

公开(公告)号：US06553080B2

公开(公告)日：2003-04-22

申请号：US09753439

申请日：2001-01-03

申请人： Howard L. Resnikoff ,  Mark Tigerman

发明人： Howard L. Resnikoff ,  Mark Tigerman

IPC分类号： H03K706

CPC分类号： H04L27/2028 ,  H04L25/03834 ,  H04L27/0004 ,  H04L27/22

摘要： A communication system and method for continuous phase modulation providing for transmission of a phase-modulated carrier having a phaseform representative of concurrently transmitted symbols. The phaseform of the phase-modulated signal is a sum of shift bi-orthogonal functions, each term in that sum being weighted by one of the overlapping symbols. The communication system and method provide full-response demodulation for the recovery of a particular symbol from among the concurrently transmitted symbols by selecting a receiving filter function shift bi-orthogonal to the transmitter filter function corresponding to the particular symbol. The communication system and method then provide for nulling, by integration over a time interval during which the particular symbol is transmitted, those transmitter filter functions that do not correspond to the particular symbol. This results in the separation of the particular symbol from the other concurrently transmitted symbols.

摘要翻译： 一种用于连续相位调制的通信系统和方法，用于传输具有代表并发传输符号的相位的相位调制载波。 相位调制信号的相位是移位双正交函数的总和，其中该项的每个项由一个重叠符号加权。 通信系统和方法通过选择与特定符号相对应的发射机滤波器函数双正交的接收滤波器函数移位来提供用于从同时发送符号中恢复特定符号的全响应解调。 然后，通信系统和方法通过在特定符号被发送的时间间隔内的积分来提供对于不对应于特定符号的那些发射机滤波器功能的归零。 这导致特定符号与其他同时传输的符号的分离。

公开(公告)号：US06298099B1

公开(公告)日：2001-10-02

申请号：US09469581

申请日：1999-12-22

申请人： Howard L. Resnikoff ,  Mark Tigerman

发明人： Howard L. Resnikoff ,  Mark Tigerman

IPC分类号： H03D300

CPC分类号： H04L27/2028 ,  H04L25/03834 ,  H04L27/0004 ,  H04L27/22

摘要： A communication system and method for continuous phase modulation providing for transmission of a phase-modulated carrier having a phaseform representative of concurrently transmitted symbols. The phaseform of the phase-modulated signal is a sum of shift bi-orthogonal functions, each term in that sum being weighted by one of the overlapping symbols. The communication system and method provide full-response demodulation for the recovery of a particular symbol from among the concurrently transmitted symbols by selecting a receiving filter function shift bi-orthogonal to the transmitter filter function corresponding to the particular symbol. The communication system and method then provide for nulling, by integration over a time interval during which the particular symbol is transmitted, those transmitter filter functions that do not correspond to the particular symbol. This results in the separation of the particular symbol from the other concurrently transmitted symbols.

公开(公告)号：US5428643A

公开(公告)日：1995-06-27

申请号：US98694

申请日：1993-07-28

申请人： Charles J. H. Razzell

发明人： Charles J. H. Razzell

IPC分类号： H04L25/49 ,  H04L25/03 ,  H04L27/20

CPC分类号： H04L27/2071 ,  H04L25/03859 ,  H04L27/2028

摘要： A digital modulator in which symbols representing bits are encoded and assigned to respective points of constellation of points representing the modulation scheme. The quadrature components of a vector representing each of the constellation points are contained in a truth table (14) in which the columns comprise the respective constellation points and the rows comprise the relative in-phase and quadrature component values. In response to the assignment of a symbol to a constellation point the appropriate column in the truth table is read out in parallel as a binary word and the bits of the word are applied to respective first stages (S10) of a plurality of shift registers (SR1 to SR8) which store the histories of the respective component values for the previous (N-1) symbols. Outputs of each of the stages (S1 to S10) of each shift register are applied as an address to a look-up table (16) storing the filter response sequences to all combinations of N bits to obtain weighted filter response sequences representative of the particular combination of bits currently stored in the stages (S1 to S 10) of each shift register (SR1 to SR8). The in-phase and quadrature phase weighted filter response sequences are combined and converted to analogue signals which are applied to a respective frequency up-conversion stage (18,20).

摘要翻译： 一种数字调制器，其中表示比特的符号被编码并分配给表示调制方案的点的星座的各个点。 表示每个星座点的矢量的正交分量被包含在真值表（14）中，其中列包括相应的星座点，并且行包括相对同相和正交分量值。 响应于将符号分配给星座点，真值表中的适当列作为二进制字并行地读出，并且该字的位被应用于多个移位寄存器的相应的第一级（S10）（S10） SR1至SR8），其存储先前（N-1）个符号的各个分量值的历史。 将每个移位寄存器的每个级（S1至S10）的输出作为地址应用于存储过滤器响应序列到N位的所有组合的查找表（16），以获得代表特定的加权滤波器响应序列 当前存储在每个移位寄存器（SR1至SR8）的级（S1至S10）中的位的组合。 同相和正交相位加权滤波器响应序列被组合并转换成应用于相应的上变频级（18,20）的模拟信号。

公开(公告)号：US5027372A

公开(公告)日：1991-06-25

申请号：US21918

申请日：1987-03-04

申请人： Hee Wong

发明人： Hee Wong

IPC分类号： H04L27/00 ,  H04L27/20

CPC分类号： H04L27/0008 ,  H04L27/2028

摘要： A differential phase shift keying (DPSK) modulator utilizes time-domain filtering techniques. The DPSK modulator includes a data scrambler which receives a serial digital data input signal and generates an output signal representing the dibit value of the serial input sequence. The dibit signal is differentially encoded and then provided to a history generator which produces phase modulating vectors utilizing pulse density modulation (PDM). The carrier waveform is then modulated utilizing the modulating vectors to generate a DPSK output signal.

摘要翻译： 差分相移键控（DPSK）调制器利用时域滤波技术。 DPSK调制器包括数据加扰器，其接收串行数字数据输入信号并产生表示串行输入序列的二进制值的输出信号。 双向信号被差分编码，然后提供给使用脉冲密度调制（PDM）产生相位调制矢量的历史发生器。 然后使用调制向量来调制载波波形，以产生DPSK输出信号。

公开(公告)号：US20180309477A1

公开(公告)日：2018-10-25

申请号：US15961731

申请日：2018-04-24

申请人： Chaos Prime, Inc.

发明人： Alan Michaels

IPC分类号： H04B1/7075 ,  H04L27/20 ,  H04L27/12

CPC分类号： H04B1/70754 ,  H04B1/707 ,  H04B2001/70724 ,  H04B2201/7073 ,  H04L27/122 ,  H04L27/2028 ,  H04L27/2035 ,  H04L27/2092

摘要： A candidate arbitrary-phase spread spectrum modulation technique that offers similar performance to spread continuous phase modulation (CPM) waveforms and additional capabilities for programming a chosen frequency domain spectra into the resulting spread spectrum signal. The proposed chaotic-FSK waveform is derived from high-order sequence-based spread spectrum signals, with multi-bit resolution chaos-based sequences defining incremental phase words, enabling real-time efficient generation of practically non-repeating waveforms. A result of the C-FSK formulation is a parameterized hybrid modulation capable of acting like a traditional sequence-based spread spectrum signal or a traditional frequency shift keying signal depending on chosen parameters. As such, adaptation in this modulation may be easily implemented as a time-varying evolution, increasing the security of the waveform while retaining many efficiently implementable receiver design characteristics of traditional PSK modulations.

公开(公告)号：US06631169B1

公开(公告)日：2003-10-07

申请号：US09472697

申请日：1999-12-27

申请人： Ming-Chou Wu ,  Hsu-Hsiang Tseng

发明人： Ming-Chou Wu ,  Hsu-Hsiang Tseng

IPC分类号： H03C300

CPC分类号： H04L27/2028 ,  H04L25/03834

摘要： The present invention is an apparatus and method for performing a Gaussian Minimum Shift Keying baseband modulation based on a reference phase to be simplified. The invention mainly comprises: a memory unit storing a plurality of parameters and their corresponding tabular data of a low pass Gaussian filter, the parameters and their corresponding tabular data being simplified in advance; the low pass filter being used for reducing the bandwidth of the apparatus and increasing the utilization of the bandwidth; and a processing unit based on the input digital data and the tabular data in the memory unit to generate the digital in-phase signal In and the digital quadrature-phase signal Qn.

摘要翻译： 本发明是一种用于基于要简化的参考相位执行高斯最小偏移键控基带调制的装置和方法。 本发明主要包括：存储多个参数的存储单元及其对应的低通高斯滤波器的表格数据，预先简化参数及其对应的表格数据; 低通滤波器用于降低设备的带宽并增加带宽的利用率; 以及基于输入数字数据和存储器单元中的表格数据的处理单元，以产生数字同相信号In和数字正交相位信号Qn。

公开(公告)号：US5187721A

公开(公告)日：1993-02-16

申请号：US671950

申请日：1991-07-08

申请人： Hee Wong

发明人： Hee Wong

IPC分类号： H04L27/00 ,  H04L27/20

CPC分类号： H04L27/2028 ,  H04L27/0008

摘要： The present invention provides a modulator/generator circuit which includes the following features: a 1200 baud 4-phase differential phase shift keying (DPSK) modulator, a 300 baud frequency shift keying (FSK) modulator, a dual tone multi-frequency (DTMF) generator and 2100/2225 Hz answer tone generators. The DPSK modulator utilizes time-domain filtering techniques. It includes a spectrum controller that shapes the in-band frequency spectrum and attenuates the adjacent channel frequency components to eliminate the conventional requirement of band-pass filters after the modulator. The FSK modulator also utilizes a spectrum controller which, during each data transition, sends out six intermediate frequencies to smooth the frequency changeover. DTMF generation is accomplished by multiplexing two sine-wave counters into a DPSK sinewave look-up ROM. By varying the duty cycle of the multiplexing control signal, the DTMF generator provides a digital pre-emphasis function that boosts the amplitude of the high-band frequencies as referenced to the low-band frequencies. The answer tone section of the circuit is accomplished by sharing portions of the FSK section since the two tones are embedded in the FSK frequencies. A digital DAC is provided for converting the modulated signal (parallel) to a serial bit stream. The modulated signal in analog form is available after a low cost low pass filter.

摘要翻译： 本发明提供了一种调制器/发生器电路，它包括以下特征：1200波特4相差分相移键控（DPSK）调制器，300波特频移键控（FSK）调制器，双音多频（DTMF） 发生器和2100/2225 Hz应答音发生器。 DPSK调制器利用时域滤波技术。 它包括一个频谱控制器，其形成带内频谱并衰减相邻信道频率分量，以消除调制器之后的带通滤波器的常规要求。 FSK调制器还使用频谱控制器，在每个数据转换期间，发送六个中频以平滑频率切换。 通过将两个正弦波计数器复用到DPSK正弦波查找ROM中来实现DTMF生成。 通过改变多路复用控制信号的占空比，DTMF发生器提供数字预加重功能，其以低频带频率为基准提升高频带的振幅。 电路的应答音部分通过共享FSK部分的部分来实现，因为两个音调被嵌入在FSK频率中。 提供数字DAC用于将调制信号（并行）转换为串行比特流。 模拟形式的调制信号在低成本低通滤波器之后可用。