公开(公告)号：US20180205399A1

公开(公告)日：2018-07-19

申请号：US15407679

申请日：2017-01-17

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Cynthia D. BARINGER ,  Mohiuddin AHMED ,  Hsuanyu PAN ,  Yen-Cheng KUAN ,  James Chingwei LI ,  Emilio A. SOVERO ,  Timothy J. TALTY

IPC分类号： H04B1/00 ,  H04J1/20

CPC分类号： H04B1/001 ,  H04J1/20

摘要： A apparatus for dynamically modifying filter characteristics of a delta-sigma modulator in order to receive and transmit radio frequency signals over a wide frequency range. The system is used for wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a cellular radio architecture that employs a combination of a single circulator, programmable band-pass sampling radio frequency (RF) front-end and optimized digital baseband that is capable of supporting all current cellular wireless access protocol frequency bands.

公开(公告)号：US20130343173A1

公开(公告)日：2013-12-26

申请号：US13914822

申请日：2013-06-11

申请人： NXP B.V.

发明人： Seyed Amir Reza Ahmadi Mehr ,  Robert Bogdan Staszewski ,  Mark Pieter van der Heijden

IPC分类号： H04J1/20

CPC分类号： H04J1/20 ,  H04B1/0483 ,  H04B2001/0491

摘要： The invention provides a transmitter comprising two (or more) phase locked loops controlling respective oscillators, and implementing different phase modulation. Multiple phases are derived from the respective oscillators, and an edge rotator forms an output signal from a combination of the phases. The oscillators can operate at different frequencies, neither of which is an integer multiple of the other, whereas the output signals of the multiplexers of the first and second phase locked loops are closer in frequency and can be the same. This reduces the problem of pulling, with a circuit that can be implemented with low power and area and with the versatility of being digitally intensive.

摘要翻译： 本发明提供一种发射器，包括两个（或多个）锁相环，用于控制相应的振荡器，并实现不同的相位调制。 从相应的振荡器导出多个相位，并且边缘旋转器从相位的组合形成输出信号。 振荡器可以以不同的频率工作，这两个频率都不是另一个的整数倍，而第一和第二锁相环的多路复用器的输出信号在频率上更接近，并且可以相同。 这减少了拉动的问题，具有可以实现低功率和面积并且具有数字密集性的通用性的电路。

公开(公告)号：US3917906A

公开(公告)日：1975-11-04

申请号：US36948173

申请日：1973-06-13

申请人： COASTCOM INC

发明人： JOHNSON J WALTER ,  BORCHERS HERBERT H

IPC分类号： H04J1/04 ,  H04J1/08 ,  H04J1/20 ,  H04N7/081 ,  H04J1/12

CPC分类号： H04N7/081 ,  H04J1/04 ,  H04J1/08 ,  H04J1/20

摘要： A system for multiplexing multiple information channels adjacent to the video spectrum on a TV microwave or cable unit by frequency modulating a high frequency subcarrier at wide deviation with one or composite information signals, translating the modulated subcarrier to a frequency adjacent to and above the video spectrum, and then bridging it into the video circuit at a level 20 dB or more below the peak video signal of the video spectrum. The system recovers the transmitted subcarrier from the video spectrum, synthesizes the subcarrier frequencies exclusive of most of the video interference in a limited bandwidth, and then detects the modulation of the synthesized subcarrier frequency.

摘要翻译： 一种用于在TV微波或电缆单元上与视频频谱相邻的多个信息信道通过用一个或复合信息信号以宽偏差频率调制高频副载波来复用多个信道的系统，将调制的子载波转换成与视频频谱相邻和高于视频频谱 ，然后在低于视频频谱的峰值视频信号的20 dB或更高的水平下将其桥接到视频电路。 系统从视频频谱中恢复发送的副载波，在有限的带宽内合成排除大多数视频干扰的子载波频率，然后检测合成副载波频率的调制。

公开(公告)号：US3736507A

公开(公告)日：1973-05-29

申请号：US3736507D

申请日：1971-08-19

申请人： COMMUNICATIONS SATELLITE CO

发明人： WOLEJSZA C ,  CACCIAMANI E

IPC分类号： H04L27/22 ,  H04L27/18 ,  H04L27/20 ,  H04L27/227 ,  H04J1/20

CPC分类号： H04L27/2071 ,  H04L27/2275

摘要： In a four phase PSK modulation/demodulation communications link phase ambiguity is resolved. At the transmitter a separate unique word modulates each of the phase quadrature components of the carrier frequency. At the receive end of the link, if the recovered carrier is locked onto the 0* phase of the received signal the two unique words will appear correctly in respective quadrature channels. However, if the recovered coherent carrier locks onto the wrong phase of the received carrier any combination of the following errors will occur: the unique words will appear in the wrong channels, the unique word in the first channel will be inverted, the unique word in the second channel will be inverted. Also the data will be garbled. The unique words, or their complements, are detected in the quadrature channels, and the channel outputs are altered, e.g., inverted or reversed, to result in the correct unique word appearing correctly at the outputs of the quadrature channels. The correction of the unique word results in an ungarbling of the data bits at the receiver.

摘要翻译： 在四相PSK调制/解调通信链路中，相位模糊度得以解决。 在发射机处，单独的唯一字调制载波频率的每个相位正交分量。 在链路的接收端，如果恢复的载波被锁定在接收信号的0°相位上，则两个独特的字将正确显示在相应的正交信道中。 然而，如果恢复的相干载波锁定到接收载波的错误相位，则会发生以下错误的任何组合：唯一的单词将出现在错误的信道中，第一个信道中的唯一字将被反转，唯一的字在 第二个通道将被反转。 数据也会乱码。 在正交信道中检测到唯一的字或其补码，并且改变信道输出，例如反相或反转，以产生在正交信道的输出处正确出现的正确唯一字。 唯一字的校正导致接收器处的数据位的解除加载。

公开(公告)号：US3718766A

公开(公告)日：1973-02-27

申请号：US3718766D

申请日：1971-07-30

申请人： COLLINS RADIO CO

发明人： STOVER H

IPC分类号： H04J1/20 ,  H04J9/00 ,  H04L27/20 ,  H04L27/227

CPC分类号： H04J1/20 ,  H04J9/00 ,  H04L27/2039 ,  H04L27/2276

摘要： A COMMUNICATIONS SYSTEM EMPLOYS TANDEM PHASE MODULATION FOR MULTIPLEXING NARROW BAND ANALOG DATA WITH VERY HIGH SPEED DIGITAL DATA. THE NARROW BAND DATA IS APPLIED AS LINEAR PHASE MODULATION OF THE SYSTEM CARRIER, WHILE THE HIGH SPEED DIGITAL DATA IS APPLIED AS PHASE-SHIFT MODULATION OF THE CARRIER.

D R A W I N G

公开(公告)号：US3491207A

公开(公告)日：1970-01-20

申请号：US3491207D

申请日：1965-10-07

申请人： SUPERIOR CONTINENTAL CORP

发明人： BIRCK MICHAEL J

IPC分类号： H04J1/20 ,  H04J3/02

CPC分类号： H04J1/20

公开(公告)号：US2380982A

公开(公告)日：1945-08-07

申请号：US46539842

申请日：1942-11-12

申请人： BELL TELEPHONE LABOR INC

发明人： DOREN MITCHELL

IPC分类号： H04J1/20

CPC分类号： H04J1/20

公开(公告)号：US20120243558A1

公开(公告)日：2012-09-27

申请号：US13408403

申请日：2012-02-29

申请人： Masato OZAWA

发明人： Masato OZAWA

IPC分类号： H04J1/20

CPC分类号： H04L5/16 ,  G09G5/006 ,  G09G2370/12 ,  H04L25/0272 ,  H04L27/10

摘要： A signal transmission system including a transmitting device and a receiving device, including: the transmitting device including: a first modulator that modulates a frequency of a control signal; and a first multiplexer that multiplexes the frequency-modulated control signal onto a DVI (Digital Visual Interface) signal to be transmitted to the receiving device via a single network cable; and the receiving device including: a first separator that separates the frequency-modulated control signal from the multiplexed DVI signal; and a first demodulator that demodulates the separated control signal.

摘要翻译： 一种包括发送装置和接收装置的信号传输系统，包括：所述发送装置包括：调制控制信号的频率的第一调制器; 以及第一多路复用器，其将调频控制信号复用到将通过单个网络电缆发送到接收设备的DVI（数字视频接口）信号; 并且所述接收装置包括：第一分离器，其将所述调频控制信号与所述多路复用的DVI信号分离; 以及解调分离的控制信号的第一解调器。

公开(公告)号：US06961317B2

公开(公告)日：2005-11-01

申请号：US09967780

申请日：2001-09-28

申请人： Daniel Y. Abramovitch ,  Michael J. Weinstein ,  Heinz R. Plitschka

发明人： Daniel Y. Abramovitch ,  Michael J. Weinstein ,  Heinz R. Plitschka

IPC分类号： G01R31/28 ,  H04B3/46 ,  H04J3/00 ,  H04L1/00 ,  H04L1/24 ,  H04J1/20

CPC分类号： H04L1/242

摘要： A test system that includes a generator and an analyzer acting cooperatively to test a device having a plurality of device communication channels. The device has a plurality of inputs and corresponding outputs, each input being connected to a corresponding one of the outputs. The correspondence between the input and output channels may change if the device is turned off and on or if the device is not actively sending data from the inputs to the outputs. The test system determines a mapping between the device inputs and outputs prior to performing bit error rate testing utilizing a mapping test pattern. The test system can then switch to a bit error rate test pattern without causing the device to drift such that the correspondence between the input and output channels is lost.

摘要翻译： 一种包括发生器和分析器的测试系统，其协作地测试具有多个设备通信信道的设备。 该装置具有多个输入和相应的输出，每个输入连接到相应的输出之一。 输入和输出通道之间的对应关系可能会改变，如果设备关闭和打开，或者设备没有主动将数据从输入发送到输出。 在使用映射测试模式执行误码率测试之前，测试系统确定设备输入和输出之间的映射。 然后，测试系统可以切换到误码率测试模式，而不会导致设备漂移，使得输入和输出通道之间的对应关系丢失。

公开(公告)号：US5528581A

公开(公告)日：1996-06-18

申请号：US160001

申请日：1993-11-30

申请人： Paulus G. M. De Bot

发明人： Paulus G. M. De Bot

IPC分类号： H04B7/12 ,  H04B7/08 ,  H04J1/20 ,  H04J11/00 ,  H04L1/06 ,  H04L27/26 ,  H04J1/08

CPC分类号： H04L27/2647 ,  H04B7/0865 ,  H04L1/06 ,  H04L27/2602 ,  H04B7/084

摘要： In a diversity transmission system the problem arises that almost no improvement can be obtained when the signals to be received show frequency selective fading within the band width of the signal to be transmitted. To solve this problem the signal to be received is separated by filter banks into a number of sub-band signals. Corresponding sub-band signals of different filter banks are combined by the combiners into combined sub-band signals. These combined sub-band signals are combined to a broad band signal by a final combiner.

摘要翻译： 在分集传输系统中，出现这样的问题，当要被接收的信号在要传输的信号的带宽内显示出频率选择性衰落时，几乎不能获得改善。 为了解决这个问题，接收的信号被滤波器组分成多个子带信号。 不同滤波器组的相应子带信号由组合器组合成组合子带信号。 这些组合的子带信号由最终组合器组合成宽频带信号。