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21. 发明公开

EP0190583A2 Receiver for phase shift modulated carrier signals 失效
标题翻译：接收器，用于相移键控的载波信号。
公开(公告)号：EP0190583A2
公开(公告)日：1986-08-13
申请号：EP86100579.1
申请日：1986-01-17
申请人： GENERAL ELECTRIC COMPANY
发明人： Hughes, William Chesley
IPC分类号： H04L27/22
CPC分类号： H04L27/2273 , H04L2027/0032 , H04L2027/0048 , H04L2027/0067
摘要： Method and apparatus are disclosed for providing a local oscillator signal which is in phase and frequency synchronism with a carrier signal wherein the frequency of the carrier is a constant multiple of the frequency of a reference waveform. A phase detector detects the phase of the local oscillator relative to the carrier and provides a signal to a microprocessor indicative of this phase. The microprocessor provides the local oscillator and responds to a reference waveform threshold detector to determine the number of local oscillator pulses provided during one cycle of the reference and to maintain this number to equal the constant multiple. The microprocessor further responds to the phase detector to adjust the phase of the local oscillator and thereby maintain phase synchronism with the carrier.

22. 发明公开

EP0154963A2 Quarternary differential PSK demodulator 失效
标题翻译： Demodulatorfürvierphasendifferenzmodulierte Signale。
公开(公告)号：EP0154963A2
公开(公告)日：1985-09-18
申请号：EP85102752.4
申请日：1985-03-11
申请人： VICTOR COMPANY OF JAPAN, LIMITED
发明人： Ishigaki, Yukinobu , Hirohashi, Kazutoshi
IPC分类号： H04L27/22
CPC分类号： H04L27/2273 , H04L2027/0048 , H04L2027/0067 , H04L2027/0073
摘要： In a quarternary differential PSK demodulator, a QPSK input signal is applied to first and second synchronous detectors to which carriers with a 90-degree phase difference therebetween are respectively applied from a voltage-controlled oscillator. A first double-balanced phase detector multiplies the outputs from the synchronous detectors. A second phase detector squares the output of the second synchronous detector. A third double-balanced phase detector provides multiplication of the outputs of the first and second double-balanced phase detector to generate an output having four times the frequency of the outputs of synchronous detectors to cancel the information carried by the input PSK signal. A loop filter converts the output of the third phase detector to a DC phase control signal to be applied the voltage-controlled oscillator.
摘要翻译：在四分之一差分PSK解调器中，将QPSK输入信号施加到第一和第二同步检测器，其中分别从压控振荡器施加90度相位差的载波。第一个双平衡相位检测器将来自同步检测器的输出相乘。第二相位检测器对第二同步检波器的输出进行平方。第三双平衡相位检测器提供第一和第二双平衡相位检测器的输出的相乘以产生具有同步检测器的输出的四倍频率的输出，以消除由输入的PSK信号携带的信息。环路滤波器将第三相位检测器的输出转换为要施加压控振荡器的DC相位控制信号。

23. 发明授权

EP3119030B1 NARROW BAND RECEIVER 有权
公开(公告)号：EP3119030B1
公开(公告)日：2018-03-21
申请号：EP16182849
申请日：2007-11-30
申请人： TELENSA HOLDINGS LTD
发明人： MASSAM PETER DAVID , BOWDEN PHILIP ALAN , HOWE TIMOTHY DAVID , JACKSON TIMOTHY
IPC分类号： H04L7/04
CPC分类号： H04L7/042 , H04L7/046 , H04L27/0014 , H04L27/16 , H04L27/2657 , H04L2027/0026 , H04L2027/0048 , H04L2027/0065 , H04L2027/0095
摘要： A method of identifying frequency data for use in adjusting a frequency offset of a receiver is described. A signal is received, comprising a set of slots, at least one of the slots comprising a preamble portion and being transmitted at a predetermined transmission frequency. The predetermined frequency is within a known range of frequencies. The method comprises dividing the range of frequencies into a plurality of frequency bands. For each data item contained within the preamble portion, a magnitude of signal received within each frequency band is identified, and a plurality of pairs of frequency bands identified. For at least some of the plurality of pairs of frequency bands, a first signal magnitude identified for one of the frequency bands is subtracted from a second signal magnitude identified for the other frequency band, whereby to demodulate the signal within at least part of said preamble portion. The subtracted signal magnitudes are combined with output from an oscillator tuned to a fundamental of a period associated with the preamble portion. For each pair frequency bands, the signal magnitudes are accumulated over the preamble portion, whereby to identify frequency data for use in adjusting a frequency offset of the receiver.

24. 发明公开

EP3078227A1 INTERFERENCE AID FREQUENCY OFFSET ESTIMATION FOR USER EQUIPMENT 有权转让
标题翻译： SCHÄTZUNGDES INTERFERENZHILFSFREQUENZVERSATZESFÜRBENUTZERVORRICHTUNG
公开(公告)号：EP3078227A1
公开(公告)日：2016-10-12
申请号：EP13898525.4
申请日：2013-12-06
申请人： Intel IP Corporation
发明人： ZHANG, Hong , LEI, Jie , FU, Yangzeng , TANG, Yunshuai , WANG, Zhen , JIA, Zhuanni , LI, Lei
IPC分类号： H04W52/00
CPC分类号： H04L27/0014 , H04J11/0036 , H04L25/0238 , H04L27/2657 , H04L2027/0026 , H04L2027/0048 , H04L2027/0065
摘要： A Frequency Offset estimation system, user equipment, and a communication system are provided. The Frequency Offset estimation system comprises a first Frequency Offset estimator to estimate wanted signal Frequency Offset of a wanted signal in an input signal; a second Frequency Offset estimator to estimate interferer Frequency Offset of an interferer in the input signal; and a Frequency Offset estimation combiner to generate a combined Frequency Offset estimation by combining estimates of the wanted signal Frequency Offset and the interferer Frequency Offset.
摘要翻译：提供频率偏移估计系统，用户设备和通信系统。频率偏移估计系统包括：第一频率偏移估计器，用于估计输入信号中有用信号的有用信号频率偏移; 用于估计干扰源的输入信号中的干扰源的频率偏移的第二频率偏移估计器; 和频率偏移估计组合器，通过组合有用信号频率偏移和干扰源频率偏移的估计来产生组合的频率偏移估计。

25. 发明授权

EP2717530B1 CARRIER SYNCHRONIZATION METHOD, CIRCUIT AND SYSTEM 有权
标题翻译：载波同步方法和系统电路
公开(公告)号：EP2717530B1
公开(公告)日：2015-09-16
申请号：EP12761273.7
申请日：2012-05-09
申请人： Huawei Technologies Co., Ltd.
发明人： LIU, Lianfu , MA, Jun
IPC分类号： H04L27/18 , H04L27/227 , H04L27/00
CPC分类号： H04J3/06 , H04B7/2643 , H04L27/0014 , H04L27/2273 , H04L2027/0024 , H04L2027/0048
摘要： Embodiments of the present invention provide a carrier synchronization method, circuit, and system, where the method includes: performing n times frequency multiplication on a received signal; performing narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and performing n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal, where n is a positive integer greater than or equal to 4. The circuit includes: an n times frequency multiplication unit, configured to perform n times frequency multiplication on a received signal; a filtering and shaping unit, configured to perform narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and an n times frequency division unit, configured to perform n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal, where n is a positive integer greater than or equal to 4. The system includes a demodulator and a carrier synchronization circuit. Compared with the prior art, in the embodiments of the present invention, carrier restoration transition time is reduced.

26. 发明公开

EP2883314A1 METHODS AND APPARATUS FOR COHERENT DUOBINARY SHAPED PM-QPSK SIGNAL PROCESSING 有权
标题翻译：用于相干双重形状PM-QPSK信号处理的方法和设备
公开(公告)号：EP2883314A1
公开(公告)日：2015-06-17
申请号：EP13827264.6
申请日：2013-08-08
申请人： ZTE (USA) Inc.
发明人： YU, Jianjun
IPC分类号： H04B10/25 , H04B10/61 , H04L27/01
CPC分类号： H04B10/6165 , H04B10/5167 , H04B10/5561 , H04B10/6162 , H04B10/6166 , H04J14/02 , H04J14/0282 , H04J14/06 , H04L25/03019 , H04L27/01 , H04L27/2096 , H04L27/223 , H04L27/34 , H04L2027/0048 , H04L2027/0067
摘要： Systems, devices and techniques for receiving a signal comprising a quadrature duobinary modulated signal include performing channel equalization of the received signal using a constant multi-modulus to obtain a set of channel estimation coefficients and a stream of symbols, partitioning, based on modulus, the stream of symbols into three partitions, estimating carrier frequency based on the partitioned stream of symbols, recovering a phase of the signal using a maximum likelihood algorithm, and decoding the partitioned stream of symbols to recover data.
摘要翻译：用于接收包括正交双二进制调制信号的信号的系统，设备和技术包括使用恒定多模数来执行接收信号的信道均衡以获得一组信道估计系数和符号流，基于模数进行划分，将符号流分成三个分区，基于划分的符号流估计载波频率，使用最大似然算法恢复信号的相位，以及解码分割的符号流以恢复数据。

27. 发明公开

EP2717530A4 CARRIER SYNCHRONIZATION METHOD, CIRCUIT AND SYSTEM 有权
标题翻译：载波同步过程，切换和系统
公开(公告)号：EP2717530A4
公开(公告)日：2014-09-17
申请号：EP12761273
申请日：2012-05-09
申请人： HUAWEI TECH CO LTD
发明人： LIU LIANFU , MA JUN
IPC分类号： H04L27/18 , H04L27/00 , H04L27/227
CPC分类号： H04J3/06 , H04B7/2643 , H04L27/0014 , H04L27/2273 , H04L2027/0024 , H04L2027/0048
摘要： Embodiments of the present invention provide a carrier synchronization method, circuit, and system, where the method includes: performing n times frequency multiplication on a received signal; performing narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and performing n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal, where n is a positive integer greater than or equal to 4. The circuit includes: an n times frequency multiplication unit, configured to perform n times frequency multiplication on a received signal; a filtering and shaping unit, configured to perform narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and an n times frequency division unit, configured to perform n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal, where n is a positive integer greater than or equal to 4. The system includes a demodulator and a carrier synchronization circuit. Compared with the prior art, in the embodiments of the present invention, carrier restoration transition time is reduced.
摘要翻译：本发明的实施例提供一种载波同步方法，电路和系统，其中该方法包括：对接收到的信号执行n次倍频; 执行窄带滤波至少两次，并在n次倍频后获得的信号进行至少两次矩形波整形; 对滤波和整形后得到的信号执行n次分频，以恢复载波信号，其中n为大于或等于4的正整数。该电路包括：n倍倍增单元，被配置为执行n 对接收信号进行倍频; 滤波和整形单元，被配置为执行至少两次的窄带滤波，并且在n次倍频之后获得的信号上进行至少两次矩形波整形; 以及n次分频单元，被配置为对滤波和整形后获得的信号执行n次分频，以恢复载波信号，其中n是大于或等于4的正整数。该系统包括解调器和载波同步电路。与现有技术相比，在本发明的实施例中，载波恢复转换时间减少。

28. 发明公开

EP1776798A4 METHOD FOR DETERMINING A RESIDUAL FREQUENCY OFFSET, COMMUNICATION SYSTEM, METHOD FOR TRANSMITTING A MESSAGE, TRANSMITTER, METHOD FOR PROCESSING A MESSAGE AND RECEIVER 审中-公开
标题翻译：一种用于确定REST频率偏移，通讯系统，方法用于发送邮件发件人，方法进行处理的消息和接收器
公开(公告)号：EP1776798A4
公开(公告)日：2011-01-12
申请号：EP05771339
申请日：2005-08-13
申请人： AGENCY SCIENCE TECH & RES
发明人： FUNG HO WANG , SUN SUMEI , HO CHIN KEONG , LIANG YING CHANG , WU YAN , LEI ZHONGDING
IPC分类号： H04J99/00 , H04L7/04 , H04J11/00
CPC分类号： H04L27/2613 , H04L27/266 , H04L27/2675 , H04L2027/0028 , H04L2027/0048 , H04L2027/0095

29. 发明公开

EP1999920A2 COMMUNICATIONS SYSTEM WITH BASEBAND PILOT INJECTED CARRIER (BPIC) MODULATION/DEMODULATION AND FRAME RECOVERY AND RELATED METHODS 审中-公开
标题翻译： WITH BPIC通信系统（基本频带INGE耦合导频载波）的调制/解调，恢复与重建和相关程序
公开(公告)号：EP1999920A2
公开(公告)日：2008-12-10
申请号：EP07752299.3
申请日：2007-03-06
申请人： Harris Corporation
发明人： BORITZKI, Daniel, L. , LUNTZ, Michael, Bernard
IPC分类号： H04L27/00
CPC分类号： H04L27/0008 , H04L27/2276 , H04L2027/0028 , H04L2027/0048 , H04L2027/0067 , H04L2027/0093
摘要： A communications system (30') may include a transmitting device (31') for transmitting a modulated signal therefrom based upon input data, and a receiving device (32') for receiving the modulated signal from the transmitting device. The transmitting device (31') may include a modulator (35'), a baseband injected pilot carrier (BPIC) generator (33') for generating BPIC data, and a framer (48' ) for interleaving BPIC data with the input data to define data frames input to the modulator. The receiving device (32' ) may include a demodulator (41'), a frame recoverer (49'), and a BPIC detector (40' ) cooperating with the demodulator for demodulating the modulated signal from the transmitting device (31') based upon the BPIC data and cooperating with the frame recoverer for recovering the data frames also based upon the BPIC data.

30. 发明公开

EP1096748A4 DIGITAL MODULATION SIGNAL MEASURING DEVICE AND METHOD CAPABLE OF EVALUATING SPECTRUM OF NOISE COMPONENT 有权
标题翻译：用于测量调制信号来也是能力的设备和方法，计算出噪声分量的谱
公开(公告)号：EP1096748A4
公开(公告)日：2005-07-27
申请号：EP00923002
申请日：2000-05-09
申请人： ANRITSU CORP
发明人： ITAHARA HIROSHI , GOTOU YOSHIHIDE
IPC分类号： H04B3/46 , H04B1/10 , H04B17/00 , H04L1/20 , H04L27/00
CPC分类号： H04L27/0014 , H04B17/23 , H04B17/309 , H04L1/206 , H04L2027/003 , H04L2027/0048
摘要： A digital modulation signal measuring device being so constructed as to correct a frequency error of a base band component contained in a digital modulation signal to be measured to generate a signal system having an ideal base band component, to detect, based on this ideal base band component, a noise component contained in the digital modulation signal, and to output (display) the spectrum of the detected noise component along with the spectrum of the base band component. The digital modulation signal measuring device can easily identify, while a digital modulation signal is actually being transmitted, the properties of a noise component contained in that digital modulation signal, thereby making it possible to easily estimate causes of the noise and improve a transmission quality.

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