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1. 发明公开

EP3119030A1 NARROW BAND RECEIVER 有权
标题翻译： SCHMALBANDEMPFÄNGER
公开(公告)号：EP3119030A1
公开(公告)日：2017-01-18
申请号：EP16182849.6
申请日：2007-11-30
申请人： Telensa Holdings Limited
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.
摘要翻译：描述了一种识别用于调整接收机的频率偏移的频率数据的方法。接收信号，包括一组时隙，所述时隙中的至少一个包括前同步码部分并以预定的发送频率发送。预定频率在已知的频率范围内。该方法包括将频率范围分成多个频带。对于包含在前同步码部分内的每个数据项，识别在每个频带内接收的信号的幅度，并且识别多个频带对。对于多对频带中的至少一些，从为另一个频带识别的第二信号幅度中减去为频带之一识别的第一信号幅度，从而在所述前同步码的至少一部分内对信号进行解调一部分。减去的信号幅度与调谐到与前导码部分相关联的周期的基波的振荡器的输出组合。对于每对频带，信号幅度在前导码部分上累积，从而识别用于调整接收机的频率偏移的频率数据。

2. 发明授权

EP1913747B1 Fast carrier frequency error estimation algorithm using sychronization sequence 有权转让
标题翻译：算法误差估计更快的载波频率由同步序列的装置
公开(公告)号：EP1913747B1
公开(公告)日：2010-12-15
申请号：EP06800404.3
申请日：2006-07-28
申请人： ITT Manufacturing Enterprises, Inc.
发明人： RASMUSSEN, Donald, John , BARNETT, Gregory, Thomas
IPC分类号： H04L27/00
CPC分类号： H04L27/0014 , H04B1/70752 , H04L2027/003 , H04L2027/0048 , H04L2027/0067
摘要： Methods and apparatus for determining carrier frequency error of a serial offset quadrature pulse shaped signal, such as a minimum shift keyed (MSK) signal, are disclosed. Carrier frequency error is determined by receiving a quadrature pulse shaped signal having a synchronization sequence (400) , detecting synchronization of the quadrature pulse shaped signal (402) , and storing a baseband inphase (I) signal and a baseband quadrature (Q) signal of the synchronization sequence while detecting synchronization (404) . After detecting synchronization, overlapped segments of the stored baseband I and Q signals are read and correlated with the sychronization sequence stored locally (406) . Carrier frequency error is then estimated based on phase differences between each of the correlated segments (406) .

3. 发明公开

EP1796337A3 Recovery of frequency jumps in QPSK modulated microwaves radio links 审中-公开
标题翻译：频率在QPSK跳频的校正调制微波无线电链路
公开(公告)号：EP1796337A3
公开(公告)日：2007-09-19
申请号：EP06005741.1
申请日：2006-03-21
申请人： Andrew Telecommunication Products S.r.l.
发明人： Vannucchi, Alessandro
IPC分类号： H04L27/00 , H04L27/38 , H03D3/00 , H04L7/033 , H03J7/02
CPC分类号： H04L27/0014 , H03J7/02 , H04L27/22 , H04L2027/003 , H04L2027/0048 , H04L2027/0053 , H04L2027/0065
摘要： The invention relates to a method for tracking Local Oscillators (LOs) phase hits and frequency clicks (fast frequency jumps) in Microwave Radio links using QPSK modulation. It consists of an AFC (Automatic Frequency Control) system, split into a "slow" carrier frequency recovery feedback subsystem (10) followed by a "fast" frequency tracking feedforward subsystem (11). The first subsystem is designed for recovering the average carrier frequency offset at the input of the demodulator, which is slowly varying with time, while the feedforward part of the AFC is designed for correcting fast frequency jumps, mainly due to microphonics of the local oscillators used in the up and/or down conversion of the modulated signal. A CTL (Carrier Tracking Loop) following the AFC system, will take care of all, if any, of the small frequency deviations introduced by the feedforward control.

4. 发明公开

EP1241846A3 Phase-locked loop initialization via curve-fitting 审中-公开
标题翻译：通过曲线拟合来初始化锁相环
公开(公告)号：EP1241846A3
公开(公告)日：2006-06-07
申请号：EP02100252.2
申请日：2002-03-14
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： HEEGARD, Chris , MURPHY, Peter A.
IPC分类号： H04L27/227
CPC分类号： H04L27/2272 , H04L2027/0048 , H04L2027/0055 , H04L2027/0067
摘要： A method and apparatus for accurately estimating the carrier frequency offset and the carrier phase offset of a digitally modulated signal using a signal processing algorithm to initialize the state variables of a Phase-Locked Loop (PLL) is disclosed. A sequence of phase values is estimated from a received sequence of symbols and the angular effect due to the modulation format is removed from the sequence of phase values. A curve-fit algorithm based in one embodiment on the RLS algorithm is then applied to a sequence of unwrapped phase values to estimate the carrier frequency offset and the carrier phase offset.

5. 发明公开

EP1241846A2 Phase-locked loop initialization via curve-fitting 审中-公开
标题翻译：初步的einer Phasenregelschleife手套Kurvenanpassung
公开(公告)号：EP1241846A2
公开(公告)日：2002-09-18
申请号：EP02100252.2
申请日：2002-03-14
申请人： Texas Instruments Incorporated
发明人： HEEGARD, Chris , MURPHY, Peter A.
IPC分类号： H04L27/227
CPC分类号： H04L27/2272 , H04L2027/0048 , H04L2027/0055 , H04L2027/0067
摘要： A method and apparatus for accurately estimating the carrier frequency offset and the carrier phase offset of a digitally modulated signal using a signal processing algorithm to initialize the state variables of a Phase-Locked Loop (PLL) is disclosed. A sequence of phase values is estimated from a received sequence of symbols and the angular effect due to the modulation format is removed from the sequence of phase values. A curve-fit algorithm based in one embodiment on the RLS algorithm is then applied to a sequence of unwrapped phase values to estimate the carrier frequency offset and the carrier phase offset.
摘要翻译：公开了一种用于使用信号处理算法精确估计数字调制信号的载波频率偏移和载波相位偏移以初始化锁相环（PLL）的状态变量的方法和装置。从接收的符号序列估计相位值序列，并且从相位值序列中去除由于调制格式引起的角度影响。然后将基于RLS算法的一个实施例中的曲线拟合算法应用于展开的相位值序列以估计载波频率偏移和载波相位偏移。

6. 发明公开

EP1047235A1 CARRIER PHASE ESTIMATOR DEVICE AND DEMODULATOR 审中-公开
标题翻译：载波相位和预测DEMODULATOR
公开(公告)号：EP1047235A1
公开(公告)日：2000-10-25
申请号：EP99922526.1
申请日：1999-05-27
申请人： MITSUBISHI DENKI KABUSHIKI KAISHA
发明人： FUJIMURA, A., Mitsubishi Denki Kabushiki Kaisha , KOJIMA, T., Mitsubishi Denki Kabushiki Kaisha
IPC分类号： H04L27/22
CPC分类号： H04L27/227 , H04L2027/0048 , H04L2027/0067 , H04L2027/0073 , H04L2027/0081
摘要： A carrier phase estimation apparatus comprises a non-linear processor (20) which removes a modulated component from a received baseband signal to obtain a non-modulated complex data, a first moving average computing unit (25a) which computes a moving average of the non-modulated complex data, a carrier phase computing unit (24) which computes a carrier phase from a vector angle represented by the moving average, and a filter band computing unit (5) which controls a band of the first moving average computing unit (25a) by using data for r symbol in the past of the non-modulated complex data.

7. 发明公开

EP0614582A1 DIGITAL DEMODULATOR FOR PREAMBLE-LESS BURST COMMUNICATIONS 失效
标题翻译：数字解调器，用于无爆炸式通信
公开(公告)号：EP0614582A1
公开(公告)日：1994-09-14
申请号：EP92925347.0
申请日：1992-11-27
申请人： COMMUNICATIONS SATELLITE CORPORATION
发明人： RHODES, Smith, A.
IPC分类号： H03D1 , H04L7 , H04L27
CPC分类号： H04L27/2332 , H03D1/00 , H04L7/0029 , H04L7/0334 , H04L7/04 , H04L7/10 , H04L2027/0048 , H04L2027/0085
摘要： Un traitement effectué par un démodulateur numérique permet de recevoir une transmission (401) en rafale sans utilisation de préambule (Fig 3b) destinée à l'acquisition de la synchronisation. On suppose que la technique de modulation est une modulation par déplacement de phase bivalente (MDPB) (250) ou une modulation par déplacement de phase quadrivalente (MSPQ) (250). Les fonctions de synchronisation (506), de filtrage (504, 505) et de détection nécessaire pour le démodulateur sont exécutées séquentiellement par traitement numérique répété d'échantillons stockés (501) de bandes de base complexes de la rafale (401) de transmission reçue.
摘要翻译：由数字解调器执行的处理使得可以在不使用旨在获取同步的前导码（图3b）的情况下接收突发传输（401）。调制技术被假定为二价相移键控（BPSK）（250）或四价相移键控（MSPQ）（250）。通过对存储的接收到的传输突发（401）的复基带的采样（501）的重复数字处理，顺序地执行解调器所需的同步（506），滤波（504,505）和检测功能。。

8. 发明公开

EP0355587A2 Timing and carrier recovery in TDMA without preamble sequence 失效
标题翻译： Takt- undTrägerrückgewinnungfürTDMA ohnePräambelfolge。
公开(公告)号：EP0355587A2
公开(公告)日：1990-02-28
申请号：EP89114740.7
申请日：1989-08-09
申请人： NORTHERN TELECOM LIMITED
发明人： McNicol, John D.
IPC分类号： H04L27/22 , H04L7/033 , H04L7/02
CPC分类号： H04L7/0029 , H04L7/0274 , H04L27/2273 , H04L27/2276 , H04L27/2332 , H04L2027/003 , H04L2027/0048 , H04L2027/0095
摘要： A method of detecting the clock rate and recovering the carrier in a TDMA signal comprises the steps of: storing for a predetermined amount of time quadrature baseband components (I,Q) as sampled data (at 54); estimating the clock rate phase error of said baseband samples (at 55); correcting the clock phase of said baseband samples from the estimated clock phase error using interpolation over said sampled quadrature components (at 56); estimating the carrier phase error of said stored baseband time corrected quadrature samples (at 58); correcting the carrier phase of said stored baseband time corrected samples according to said estimated phase error (at 59) ; and forwarding said corrected clock and carrier signals to decision circuit means (60) for providing demodulated data. This method permits to minimize the frame overhead allocated to clock and carrier training sequences while maintaining a reliable data signal for error free transmission.
摘要翻译：一种在TDMA信号中检测时钟速率和恢复载波的方法包括以下步骤：将预定量的时间正交基带分量（I，Q）存储为采样数据（在54）; 估计所述基带样本的时钟速率相位误差（在55）; 使用在所述采样正交分量上的内插从估计的时钟相位误差校正所述基带样本的时钟相位（在56处）; 估计所述存储的基带时间校正正交样本的载波相位误差（58）; 根据所述估计的相位误差校正所述存储的基带时间校正采样的载波相位（在59）; 并将所述校正的时钟和载波信号转发到用于提供解调数据的决策电路装置（60）。该方法允许最小化分配给时钟和载波训练序列的帧开销，同时保持用于无差错传输的可靠数据信号。

9. 发明公开

EP0190583A3 Receiver for phase shift modulated carrier signals 失效
标题翻译：接收器用于相位调制的载波信号
公开(公告)号：EP0190583A3
公开(公告)日：1988-08-24
申请号：EP86100579
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.

10. 发明授权

EP2883314B1 METHODS AND APPARATUS FOR COHERENT DUOBINARY SHAPED PM-QPSK SIGNAL PROCESSING 有权
公开(公告)号：EP2883314B1
公开(公告)日：2018-07-25
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 , H04B10/516 , H04B10/556 , H04J14/02 , H04J14/06 , H04L25/03 , H04L27/20 , H04L27/22 , H04L27/34 , H04L27/00
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.

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