公开(公告)号：US20110103514A1

公开(公告)日：2011-05-05

申请号：US12846169

申请日：2010-07-29

申请人： Sung-Ik PARK ,  Hyoungsoo Lim ,  Heung-Mook Kim ,  Donghoon Kang ,  Wangrok Oh

发明人： Sung-Ik PARK ,  Hyoungsoo Lim ,  Heung-Mook Kim ,  Donghoon Kang ,  Wangrok Oh

IPC分类号： H04L27/04 ,  H03D1/24

CPC分类号： H04L27/02 ,  H03C1/547 ,  H03D1/2245 ,  H03D2200/008

摘要： A transmitter for transmitting data in a communication system includes: a serial/parallel (S/P) conversion unit configured to convert data into an I signal and a Q signal; multiplication units configured to multiply the converted I and Q signals by orthogonal sequences, respectively; conversion units configured to Hilbert-transform the I and Q signals multiplied by the orthogonal sequences; addition units configured to add the I and Q signals multiplied by the orthogonal sequences and the Hilbert-transformed Q and I signal, respectively; and an intermediate frequency (IF)/radio frequency (RF) unit configured to up-convert the added I signal and the added Q signal and transmit the converted I and Q signals.

摘要翻译： 一种用于在通信系统中传输数据的发射机包括：串行/并行（S / P）转换单元，被配置为将数据转换为I信号和Q信号; 乘法单元，分别被配置为通过正交序列来乘法转换的I和Q信号; 转换单元，被配置为希尔伯特变换乘以正交序列的I和Q信号; 附加单元，被配置为分别加上乘以正交序列的I和Q信号以及希尔伯特变换的Q和I信号; 以及中频（IF）/射频（RF）单元，被配置为对所添加的I信号和所添加的Q信号进行上变频，并发送所转换的I和Q信号。

公开(公告)号：US20180269890A1

公开(公告)日：2018-09-20

申请号：US15919962

申请日：2018-03-13

申请人： Associated Universities, Inc.

发明人： Omar Artemi Yeste Ojeda

IPC分类号： H03M1/12 ,  H04B1/00 ,  H04L7/00 ,  H03D3/00

CPC分类号： H03M1/1245 ,  H03D3/007 ,  H03D2200/008 ,  H04B1/0042 ,  H04L7/0008

摘要： Methods and systems for generating a digital representation of the amplitude and phase of a bandpass signal are disclosed. The methods comprise filtering the bandpass signal with a bandpass filter, generating the real and imaginary parts of the complex analytic signal with a quadrature hybrid, determining the amplitude of the complex analytic signal by adding an even power-law transform of the real and imaginary parts of the complex analytic signal, and determining the phase of the complex analytic signal by comparing the real and imaginary parts of the complex analytic signal to zero and comparing an even power-law transform of the real and imaginary parts of the complex analytic signal to each other. Analog to digital converters and methods of converting complex analytic signals to digital signals are also disclosed.

公开(公告)号：US4902979A

公开(公告)日：1990-02-20

申请号：US321697

申请日：1989-03-10

申请人： Charles M. Puckette, IV

发明人： Charles M. Puckette, IV

IPC分类号： H03D3/00 ,  H03D7/00

CPC分类号： H03D3/008 ,  H03D2200/0054 ,  H03D2200/008 ,  H03D3/006 ,  H03D7/00

摘要： A homodyne down-converter, for use in an IF signal demodulator and the like, includes an analog-to-digital converter (ADC) which receives the IF analog signal for conversion to a digital data stream by sampling at a sampling rate frequency substantially equal to four times the IF signal frequency. A digital mixer controllably inverts the sampled data to convert the data to baseband, before a circuit removes the effects of DC offset in the analog IF signal applied to the ADC. A discrete Hilbert Transform filter is used for generating streams of sequential in-phase I' and quadrature-phase Q' data words, which are resampled to temporally align the two data word streams at a new data rate, thus effectively removing sample offset without the need for separate misalignment correction circuitry.

摘要翻译： 用于IF信号解调器等的零差下转换器包括模数转换器（ADC），其通过以基本相等的采样率频率进行采样来接收IF模拟信号以转换为数字数据流 到IF信号频率的四倍。 在电路消除了施加到ADC的模拟IF信号中的DC偏移的影响之前，数字混合器可控地反转采样数据以将数据转换为基带。 离散希尔伯特变换滤波器用于产生顺序同相I'和正交相位Q'数据字的流，这些数据字被重采样以便以新的数据速率对两个数据字流进行时间对准，从而有效地去除样本偏移，而没有 需要单独的不对准校正电路。

公开(公告)号：US4878029A

公开(公告)日：1989-10-31

申请号：US280073

申请日：1988-12-05

申请人： Gary J. Saulnier ,  Randy G. Herrera ,  Timothy E. Thiel

发明人： Gary J. Saulnier ,  Randy G. Herrera ,  Timothy E. Thiel

IPC分类号： H03H17/08 ,  H03D3/00 ,  H03D7/00 ,  H04L27/00

CPC分类号： H03D3/009 ,  H03D3/008 ,  H03D2200/0047 ,  H03D2200/005 ,  H03D2200/006 ,  H03D2200/007 ,  H03D2200/008 ,  H03D2200/0082 ,  H03D3/006 ,  H03D7/00

摘要： A complex digital sampling converter, for use with an IF demodulator, includes: an analog-to-digital converter (ADC) receiving the IF analog signal for conversion to a digital data stream by sampling at a sampling rate frequency substantially equal to four times the IF signal frequency; a digital mixer for converting the sampled data to baseband; a sorter for separating the interleaved sequential in-phase I data words and quadrature-phase Q data words into a pair of concurrent I and Q data word streams; and at least one of a circuit for removing the effects of any DC offset in the analog IF signal applied to the ADC, and a circuit for correcting misalignment errors in the concurrent I and Q streams. Preferably, both correction circuits are utilized, with the DC offset removal circuit using averaging of all of the baseband samples, and the misalignment correction circuit averaging each pair of quadrature-phased Q data words while compensating the in-phase I data streams for the extra delay in the averaged Q data.

摘要翻译： 与IF解调器一起使用的复数数字采样转换器包括：模数转换器（ADC），其接收IF模拟信号，用于通过以基本上等于四分之一倍的采样率频率进行采样来转换为数字数据流 中频信号频率; 用于将采样数据转换成基带的数字混合器; 分类器，用于将交织的顺序同相I数据字和正交相位Q数据字分离成一对并行I和Q数据字流; 以及用于去除施加到ADC的模拟IF信号中的任何DC偏移的影响的电路中的至少一个，以及用于校正并行I和Q流中的未对准误差的电路。 优选地，使用两个校正电路，其中DC偏移去除电路使用所有基带采样的平均，并且未对准校正电路对每对正交相位Q数据字进行平均，同时补偿同相I数据流的额外 延迟平均Q数据。

公开(公告)号：US4506228A

公开(公告)日：1985-03-19

申请号：US405318

申请日：1982-08-05

申请人： Karl-Dirk Kammeyer

发明人： Karl-Dirk Kammeyer

IPC分类号： H03B27/00 ,  H03B28/00 ,  H03D3/00 ,  H03D3/02 ,  H03K9/04

CPC分类号： H03D3/007 ,  H03B27/00 ,  H03B28/00 ,  H03D2200/0035 ,  H03D2200/005 ,  H03D2200/006 ,  H03D2200/008 ,  H03D3/006 ,  H03D3/02

摘要： FM Signals are demodulated on an entirely digital basis by converting the digitalized signal into a pair of signals which are substantially Hilbert transforms of each other. This requires at least one pair of nonrecursive filters having lower signal sample rates at the output than at the input. Each signal is delayed by one output sample interval, so that cross products of the delayed and undelayed Hilbert transforms can be formed, and the difference between them obtained. Finally, an arc-sine table is used to remove sine-function distortion. A single multiplier-accumulator provided with extra registers can perform all of the necessary arithmetical operations at the speeds required.

摘要翻译： FM信号通过将数字化信号转换为彼此基本上为希尔伯特变换的一对信号而在完全数字的基础上进行解调。 这需要至少一对非递归滤波器，在输出处具有比在输入处具有更低的信号采样率。 每个信号被延迟一个输出采样间隔，从而可以形成延迟和未延迟希尔伯特变换的交叉乘积，并获得它们之间的差异。 最后，使用电弧正弦表来消除正弦函数失真。 提供额外寄存器的单个乘法器累加器可以以所需的速度执行所有必要的算术运算。

公开(公告)号：US20190253066A1

公开(公告)日：2019-08-15

申请号：US16393556

申请日：2019-04-24

申请人： Associated Universities, Inc.

发明人： Omar Artemi Yeste Ojeda

IPC分类号： H03M1/12 ,  H03D3/00 ,  H04L7/00 ,  H04B1/00

CPC分类号： H03M1/1245 ,  H03D3/007 ,  H03D2200/008 ,  H03M1/365 ,  H04B1/0042 ,  H04L7/0008

摘要： Methods and systems for generating a digital representation of the amplitude and phase of a bandpass signal are disclosed. The methods comprise filtering the bandpass signal with a bandpass filter, generating the real and imaginary parts of the complex analytic signal with a quadrature hybrid, determining the amplitude of the complex analytic signal by adding an even power-law transform of the real and imaginary parts of the complex analytic signal, and determining the phase of the complex analytic signal by comparing the real and imaginary parts of the complex analytic signal to zero and comparing an even power-law transform of the real and imaginary parts of the complex analytic signal to each other. Analog to digital converters and methods of converting complex analytic signals to digital signals are also disclosed.

公开(公告)号：US08270533B2

公开(公告)日：2012-09-18

申请号：US12846169

申请日：2010-07-29

申请人： Sung-Ik Park ,  Hyoungsoo Lim ,  Heung-Mook Kim ,  Donghoon Kang ,  Wangrok Oh

发明人： Sung-Ik Park ,  Hyoungsoo Lim ,  Heung-Mook Kim ,  Donghoon Kang ,  Wangrok Oh

IPC分类号： H04L27/04 ,  H03D1/24

CPC分类号： H04L27/02 ,  H03C1/547 ,  H03D1/2245 ,  H03D2200/008

摘要： A transmitter for transmitting data in a communication system includes: a serial/parallel (S/P) conversion unit configured to convert data into an I signal and a Q signal; multiplication units configured to multiply the converted I and Q signals by orthogonal sequences, respectively; conversion units configured to Hilbert-transform the I and Q signals multiplied by the orthogonal sequences; addition units configured to add the I and Q signals multiplied by the orthogonal sequences and the Hilbert-transformed Q and I signal, respectively; and an intermediate frequency (IF)/radio frequency (RF) unit configured to up-convert the added I signal and the added Q signal and transmit the converted I and Q signals.

摘要翻译： 一种用于在通信系统中传输数据的发射机包括：串行/并行（S / P）转换单元，被配置为将数据转换为I信号和Q信号; 乘法单元，分别被配置为通过正交序列来乘法转换的I和Q信号; 转换单元，被配置为希尔伯特变换乘以正交序列的I和Q信号; 附加单元，被配置为分别加上乘以正交序列的I和Q信号以及希尔伯特变换的Q和I信号; 以及中频（IF）/射频（RF）单元，被配置为对所添加的I信号和所添加的Q信号进行上变频，并发送所转换的I和Q信号。

公开(公告)号：US5521938A

公开(公告)日：1996-05-28

申请号：US276073

申请日：1994-07-01

申请人： Kenneth A. Stewart ,  Robert T. Love

发明人： Kenneth A. Stewart ,  Robert T. Love

IPC分类号： H03D3/00 ,  H04B1/26 ,  H04B1/707 ,  H04B1/69

CPC分类号： H04B1/0021 ,  H03D3/007 ,  H04B1/0003 ,  H04B1/0032 ,  H04B1/0046 ,  H04B1/26 ,  H03D2200/005 ,  H03D2200/0056 ,  H03D2200/006 ,  H03D2200/0068 ,  H03D2200/0072 ,  H03D2200/008

摘要： An efficient apparatus for performing frequency conversion from a final IF frequency to a baseband frequency is described. A counter (401) generates two logical signals G1 (402) and G2 (403) which are passed to an exclusive-OR gate (404) and a multiplexer (406). When a control signal (411) is deasserted, multiplexer (406) passes signal G1 to I1 and signal G2 to I2; when control signal (411) is asserted, multiplexer (406) passes binary signal G1 to I2 (410) and signal G2 to I1 (407). Similarly, multiplexer (405) swaps its input real and imaginary samples when the output of exclusive-OR gate (404) is asserted; otherwise, it performs no operation on its input samples. Signals I1 (407) and I2 (410) are used to control arithmetic inverters (408) and (409) respectively. When the controlling signal for either inverter is asserted, the inverter performs arithmetic inversion, otherwise it performs no operation.

摘要翻译： 描述用于从最终IF频率到基带频率执行频率转换的有效装置。 计数器（401）生成传递给异或门（404）和多路复用器（406）的两个逻辑信号G1（402）和G2（403）。 当控制信号（411）被断言时，多路复用器（406）将信号G1通过信号G1到信号G2到I2; 当控制信号（411）被断言时，多路复用器（406）将二进制信号G1传递给I2（410）和信号G2到I1（407）。 类似地，当异或门（404）的输出被断言时，多路复用器（405）交换其输入的实数和虚数样本; 否则，它对其输入样本不执行任何操作。 信号I1（407）和I2（410）分别用于控制算术逆变器（408）和（409）。 当任一变频器的控制信号有效时，变频器进行算术反转，否则不执行。

公开(公告)号：US5119199A

公开(公告)日：1992-06-02

申请号：US527859

申请日：1990-05-24

申请人： Etsurou Sakamoto

发明人： Etsurou Sakamoto

IPC分类号： H03D3/00 ,  H04N5/911 ,  H04N5/93

CPC分类号： H03D3/007 ,  H04N5/911 ,  H04N5/93 ,  H03D2200/0062 ,  H03D2200/008 ,  H03D3/006

摘要： An imput for receiving FM modulated video signals is connected to a first demodulator circuit, the output of which is connected to the first input of an adder. The input is also connected to a transversal filter, the output of which feeds a Hilbert transform circuit that has its output connected to a second demodulator circuit. The output of the second demodulator is connected to a second input of the adder, the adder providing an FM demodulated video signal with reduced moire and improved signal-to-noise ratio. In a second embodiment, the Hilbert transform circuit is formed by delay circuits and a subtraction circuit connected to subtract the output of the delay circuits from the input thereto. An adder is connected to add the output of the delay circuits to the input thereto. First and second demodulation circuits receive the outputs from the subtractor and adder, respectively, and the outputs of the first and second demodulation circuits are mixed to produce the FM demodulated video signal.

公开(公告)号：US5056115A

公开(公告)日：1991-10-08

申请号：US484858

申请日：1990-02-27

申请人： Bernard Meuriche

发明人： Bernard Meuriche

IPC分类号： G01R23/16 ,  H03B27/00 ,  H03B28/00 ,  H03D3/00 ,  H03D7/16 ,  H03L7/099 ,  H04L27/00 ,  H04L27/227

CPC分类号： H03D3/007 ,  G01R23/16 ,  H03L7/0991 ,  H04L27/2273 ,  H03B27/00 ,  H03B28/00 ,  H03D2200/0035 ,  H03D2200/005 ,  H03D2200/0062 ,  H03D2200/008 ,  H03D7/165 ,  H04L2027/0028 ,  H04L2027/0057

摘要： A device for the simultaneous division of a bandpass signal s(t)=x(t) cos .omega.ot-y(t) sin .omega.ot, .omega.o being an arbitrary angular velocity, into its components x(t), y(t), according to two carriers in quadrature cos .omega.ot and -sin .omega.ot at the angular velocity .omega.o, including a filter (3) for filtering the signal s(t), analog transform circuitry (8;25,26) for producing the Hilbert transform s(t) of the input signal s(t) provided in at least one of the channels of the device, a first sampler (6;21) for sampling the input signal s(t) and a second sampler (9;22) for sampling the Hilbert transform s(t), the samplers being controlled at a sampling frequency fe supplied by a sampling oscillator, fe being not less than 2F, F being the difference between fo=.omega.o/2.pi. and the frequency of the spectrum of the filtered input signal s(t) which is most distant from fo, and two analog-digital converters (7,10;23,24), associated with each sampler (6,9;21,22). The frequency fe and phase of the sampling oscillator are chosen as a function of fo in such a way that at any sampling instant te there is a relationship of the type: ##EQU1## The sampling frequency fe can be chosen to be smaller than fo and the values of the components according to the two carriers in quadrature at .omega.o, x and y, are directly available at the outputs of the analog-digital converters (7,10;23,24) at the sampling instant te.

摘要翻译： 用于将分量x（t），y（t）的带通信号s（t）= x（t）cosωot-y（t）sinωωt，ωo作为任意角速度同时划分的装置 ），根据包括用于滤波信号s（t）的滤波器（3）的角速度ωω的正交cosωωt和-sinωωt中的两个载波，模拟变换电路（8; 25,26）用于产生 设置在设备的至少一个通道中的输入信号s（t）的希尔伯特变换s（t），用于对输入信号s（t）进行采样的第一采样器（6; 21）和第二采样器 ; 22）用于对希尔伯特变换s（t）进行采样，采样器以采样振荡器提供的采样频率fe控制，fe不小于2F，F为f i =ωo / 2 pi与频率之间的差 与最远离fo的滤波输入信号s（t）的频谱以及与每个采样器（6,9; 21,22）相关联的两个模数转换器（7,10; 23,24）。 采样振荡器的频率fe和相位选择为fo的函数，使得在任何采样时刻te都有类型的关系：采样频率fe可以选择为小于fo， 在ωo，x和y处正交的两个载波的分量的值可以在采样时刻te的模拟数字转换器（7,10; 23,24）的输出处直接可用。