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1. 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.

2. 发明公开

EP1643705A1 TIMING EXTRACTION DEVICE AND METHOD, AND DEMODULATION DEVICE USING THE TIMING EXTRACTION DEVICE 审中-公开
标题翻译：定时超声诊断系统（VERFAHREN UND DEEMODULATIONSEINRICHTUNG MIT DER TIMING-EXTRAKTIONSEINRICHTUNG）
公开(公告)号：EP1643705A1
公开(公告)日：2006-04-05
申请号：EP04736273.6
申请日：2004-06-07
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： SOGA, Shigeru
IPC分类号： H04L27/22 , H04L27/00 , H04L7/027
CPC分类号： H04L7/027 , H04L7/007 , H04L27/2276
摘要： In a timing component extractor for a digital modulated signal, a frequency converting section 30 receives a complex baseband signal having a symbol rate fs and formed from an I signal and a Q signal, and converts frequency components ±fs/2, which are present in the complex baseband signal as the data changes, to frequency components ±fs/4. The I signal and Q signal of the complex baseband signal are then nonlinearly processed. In other words, multipliers 31, 32 square the I signal and the Q signal, respectively, and an adder 33 adds the respective results of the multipliers 31, 32. A BPF 34 extracts the frequency components ±fs/2 from the output of the adder 33, and outputs the extracted frequency components ±fs/2 as a timing signal. Accordingly, processing can be conducted at a sampling frequency which is twice the symbol rate fs. Moreover, timing extraction can be stably conducted without being affected by a carrier frequency offset.
摘要翻译：在数字调制信号的定时分量提取器中，频率转换部分30接收由I信号和Q信号形成的具有符号速率fs的复基带信号，并且将频率分量±fs / 2转换成复数基带信号作为数据变化，频率成分为±fs / 4。然后对复基带信号的I信号和Q信号进行非线性处理。换句话说，乘法器31,32分别对I信号和Q信号进行平方，并且加法器33将乘法器31,32的各个结果相加.BPF 34从频率分量±fs / 2中提取频率分量±fs / 2 并将所提取的频率分量±fs / 2作为定时信号输出。因此，可以以符号率fs的两倍的采样频率进行处理。此外，可以稳定地进行定时提取而不受载波频率偏移的影响。

3. 发明公开

EP0808047A1 Démodulateur numérique de signal modulé en phase 失效
标题翻译： Digitaler Demodulatorfürphasenmodulierte Signale
公开(公告)号：EP0808047A1
公开(公告)日：1997-11-19
申请号：EP97401055.5
申请日：1997-05-12
申请人： FRANCE TELECOM , LA POSTE
发明人： Levionnais, Philippe
IPC分类号： H04L27/227
CPC分类号： H04L27/2276
摘要： Le démodulateur permet de traiter un signal ayant une porteuse modulée par sauts de phase (0, π) et échantillonné à une cadence au moins double de la fréquence de la porteuse. Il comprend, en cascade, un premier multiplieur d'élévation au carré des échantillons successifs e(t) ; une boucle à verrouillage de phase réglée à la fréquence de la porteuse, réalisant un filtrage numérique programmable ; un diviseur de fréquence par deux, reconstituant la porteuse à partir de la sortie de la boucle à verrouillage de phase ; un second multiplieur recevant le signal d'entrée échantillonné et le signal de sortie du diviseur, un circuit d'ajustage de phase étant placé en avant du second multiplieur sur une de ses entrées ; et un filtre numérique passe-bas de sortie.
摘要翻译：解调器与采集电路（10）一起使用，该采集电路以等于载波频率的至少两倍的速率对输入的模拟信号进行采样和数字化。结果是平方（12）并且被施加到用作编程滤波器的锁相环（14）。为了恢复载波频率，数字分频器（16）经由诸如等待文件存储器的移相器（19）连接到数字化采样的乘法器（18），该等待文件存储器引入了方便数量的样本的移位。通过简单的低通数字滤波器（20）去除载波频率处的残余分量及其谐波。

4. 发明授权

EP0532504B1 CABLE TELEVISION RADIO FREQUENCY DATA PROCESSOR 失效
标题翻译：射频数据处理器有线电视
公开(公告)号：EP0532504B1
公开(公告)日：1997-06-04
申请号：EP91906937.7
申请日：1991-03-20
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： McMULLAN, Jay, Cauthern, Jr. , HODER, Douglas, John , HUNTLEY, Donald, Randolph
IPC分类号： H04L12/28 , H04L1/00 , H04B1/06 , H04H1/02 , H04J3/26
CPC分类号： H04N21/44222 , H04L5/06 , H04L27/2035 , H04L27/2276 , H04N7/10 , H04N7/17309 , H04N21/25891
摘要： A cable television radio frequency data processor (322) for receiving and processing data transmitted from a cable television terminal (315) to the headend (312) of a cable television system comprises a plurality of data receivers (810-813) for receiving the returned data, detectors associated with each receiver for providing an indication of received signal strength and a data processor (840). The data processor (840) responsive to the data receivers (810-813) eliminates redundant data and collects statistics on data throughput and, responsive to the detectors, collects statistics on received signal strength. The data processor (840) then may initiate recalibration of transmit signal levels or an appropriate selection of data transmit channels as required.

5. 发明公开

EP0732833A1 Carrier recovery circuit 失效
标题翻译： Trägerrückgewinnungsschaltung
公开(公告)号：EP0732833A1
公开(公告)日：1996-09-18
申请号：EP96103691.0
申请日：1996-03-08
申请人： NEC CORPORATION
发明人： Chiba, Kenichiro
IPC分类号： H04L27/227
CPC分类号： H04L27/2276
摘要： The invention provides a carrier recovery circuit which reduces the amount of calculation processing recovered to renew the tap coefficients of an adaptive filter to achieve improvement performance at low signal-to-noise ratio and make high speed pull in possible. Tap coefficients of variable coefficient filter 12 of adaptive line enhancer 1 are blocked into a plurality of blocks, and switches of switch circuit 14 individually corresponding to the blocks are selected by coefficient renewal control circuit 3 and renewal of the tap coefficients of the selected block is executed by adaptive algorithm circuit 13. Since all tap coefficients need not necessarily be renewed at a time in each symbol cycle, only the tap coefficients of the selected block are renewed. Thus although the adaptive speed of the adaptive emission line emphasizer decreases, the adaptive line enhancer can be constructed with a narrower band. Further, by varying the number of blocks to be selected in response to frame synchronizing information, prior to establishment of frame synchronization the number of blocks to be selected can be reduced and high speed pull in is realized.
摘要翻译：本发明提供一种载波恢复电路，其减少恢复的计算处理量以更新自适应滤波器的抽头系数，以在低信噪比下实现改进性能并且可能进行高速拉动。自适应线增强器1的可变系数滤波器12的抽头系数被阻塞成多个块，并且由系数更新控制电路3选择单独对应于块的开关电路14的开关，并且所选块的抽头系数的更新为由自适应算法电路13执行。由于在每个符号周期中不必一次更新所有抽头系数，所以仅更新所选块的抽头系数。因此，虽然自适应发射线强调器的自适应速度降低，但是自适应线增强器可以被构造成具有较窄的频带。此外，通过根据帧同步信息改变要选择的块的数量，在建立帧同步之前，可以减少要选择的块的数量，并实现高速提取。

6. 发明公开

EP0732022A1 METHOD AND APPARATUS FOR COHERENT COMMUNICATION RECEPTION IN A SPREAD-SPECTRUM COMMUNICATION SYSTEM 有权转让
标题翻译：方法和设备的相干接收消息在扩频传输系统
公开(公告)号：EP0732022A1
公开(公告)日：1996-09-18
申请号：EP95930789.0
申请日：1995-07-31
申请人： MOTOROLA, INC.
发明人： LING, Fuyun , SEXTON, Thomas, A. , BRUCKERT, Gene
IPC分类号： H04L27 , H04B1 , H04J3 , H04L7 , H04L25
CPC分类号： H04B1/7087 , H04B1/707 , H04B1/7117 , H04B2201/70703 , H04B2201/70705 , H04J3/0605 , H04L25/0202 , H04L27/2276
摘要： A method and apparatus is provided for facilitating coherent communication reception. A received reference symbol coded spread-spectrum communication signal is despread with a spreading code to derive a stream of reference samples (152) and a stream of data samples (158). The channel response is estimated by utilizing the stream of reference samples (152). An offset frequency detector (443) determines an offset to be applied to the received signal via a frequency locked loop (456), while a timing control (176) compensates for slow timing drift and fast fading based on power estimates derived from the stream of reference samples (152) and/or the stream of data samples (158). A rate estimator determines the rate at which the information was encoded, and the rate information is used to optimize the timing control (176), frequency offset detector (443) and channel estimator (154). Thus an improved detection of estimated data symbols from the stream of received data samples (158) is provided.

7. 发明公开

EP0632610A1 Dispositif de détection de mot unique dans un système BPSK - TDMA 失效
标题翻译： Einrichtung zur Erkennung vonEinzewörternin einem BPSK-TDMA-System。
公开(公告)号：EP0632610A1
公开(公告)日：1995-01-04
申请号：EP94401445.5
申请日：1994-06-27
申请人： ALCATEL TELSPACE
发明人： Sehier, Philippe , Lepape, Yannick
IPC分类号： H04J3/06 , H04L27/22
CPC分类号： H04L27/2276 , H04L7/042
摘要： Un dispositif de récupération de la porteuse d'un signal de type TDMA fournit l'enveloppe complexe (r k ) de ce signal sur une voie réelle (P) et une voie imaginaire (Q). Des moyens de décalage angulaire (60,61) de π/4 de la constellation de l'enveloppe complexe (r k ) fournissent un signal complexe (Z k ) sur une voie principale et sur une voie auxiliaire. Des moyens (65,66,67,68,69) de détection d'énergie pilotent un multiplexeur (70) pour qu'il fournisse à un corrélateur (71) la voie, réelle ou imaginaire, porteuse de l'énergie la plus importante. Le corrélateur (71) calcule le niveau de corrélation (x) entre le signal de sortie du multiplexeur (70) et un mot unique (MU) de référence. Des moyens de comparaison (72,73,74) du niveau de corrélation (x) avec une valeur de seuil (S) indiquent la détection du mot unique (MU) dans le signal de la voie appliquée au corrélateur (71).
摘要翻译：用于恢复TDMA类型信号的载波的装置在真实信道（P）和虚信道（Q）上提供该信号的复包络（rk）。用于通过复信封（rk）的星座的pi / 4进行角位移的装置（60,61）在主通道和辅助通道上提供复信号（Zk）。能量检测装置（65,66,67,68,69）驱动多路复用器（70），使得其将具有最高能量的实际或虚拟的信道提供给相关器（71）。相关器（71）计算来自多路复用器（70）的输出信号与唯一参考字（MU）之间的相关度（x）。用于将相关度（x）与阈值（S）进行比较的装置（72,73,74）表示对施加到相关器（71）的信道的信号中的唯一字（MU）的检测。

8. 发明公开

EP0504890A3 Demodulator for demodulating a pi/4-shift DQPSK signal 失效
标题翻译：用于解调PI / 4位DQPSK信号的解调器
公开(公告)号：EP0504890A3
公开(公告)日：1993-10-27
申请号：EP92104799.9
申请日：1992-03-19
申请人： SONY CORPORATION
发明人： Sato, Teruo
IPC分类号： H04L27/22
CPC分类号： H04L27/2276 , H04L25/03273 , H04L27/2275
摘要： The present invention is directed to a demodulator for pi/4-shift DQPSK signals. The demodulator includes means (13,15) for rotating the reference phase axis in each symbol interval. The incoming signal is coherently demodulated (1,2), in such a way that the rotation of the signal and the rotation of the reference axis are never through the same angle, thus preventing the demodulator output assuming the zero level. According to another aspect of the invention, means (24 to 34) are provided for evaluating the changes in the locations of signal points.

9. 发明公开

EP0532504A4 CABLE TELEVISION RADIO FREQUENCY DATA PROCESSOR 失效
标题翻译：电缆电视无线电频率数据处理器
公开(公告)号：EP0532504A4
公开(公告)日：1993-08-04
申请号：EP91906937
申请日：1991-03-20
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： MCMULLAN, JAY, CAUTHERN, JR. , HODER, DOUGLAS, JOHN , HUNTLEY, DONALD, RANDOLPH
IPC分类号： H04H20/76 , H04L1/00 , H04L5/06 , H04L27/20 , H04L27/227 , H04N7/10 , H04N7/173 , H04B1/06 , H04H1/02 , H04J3/26
CPC分类号： H04N21/44222 , H04L5/06 , H04L27/2035 , H04L27/2276 , H04N7/10 , H04N7/17309 , H04N21/25891
摘要： A cable television radio frequency data processor (322) for receiving and processing data transmitted from a cable television terminal (315) to the headend (312) of a cable television system comprises a plurality of data receivers (810-813) for receiving the returned data, detectors associated with each receiver for providing an indication of received signal strength and a data processor (840). The data processor (840) responsive to the data receivers (810-813) eliminates redundant data and collects statistics on data throughput and, responsive to the detectors, collects statistics on received signal strength. The data processor (840) then may initiate recalibration of transmit signal levels or an appropriate selection of data transmit channels as required.

10. 发明公开

EP0504890A2 Demodulator for demodulating a pi/4-shift DQPSK signal 失效
标题翻译： Demodulator zur Demodulierung eines pi / 4-umgetasteten DQPSK-Signals。
公开(公告)号：EP0504890A2
公开(公告)日：1992-09-23
申请号：EP92104799.9
申请日：1992-03-19
申请人： SONY CORPORATION
发明人： Sato, Teruo
IPC分类号： H04L27/22
CPC分类号： H04L27/2276 , H04L25/03273 , H04L27/2275
摘要： The present invention is directed to a demodulator for pi/4-shift DQPSK signals. The demodulator includes means (13,15) for rotating the reference phase axis in each symbol interval. The incoming signal is coherently demodulated (1,2), in such a way that the rotation of the signal and the rotation of the reference axis are never through the same angle, thus preventing the demodulator output assuming the zero level.
According to another aspect of the invention, means (24 to 34) are provided for evaluating the changes in the locations of signal points.
摘要翻译：本发明涉及一种差分移相键控（PSK）信号解调器，其中当根据pi / 4位移DQPSK调制系统调制的信号被解调时提供的错误率可以得到改善。本发明的差分PSK信号解调器包括用于与检测到的符号被提供的定时同步地沿着逆时针方向将检测基准轴的相位相移（13,15）预定角度的装置，其中所述调制信号被同步检测（1,2），使得所述符号的旋转角度和检测基准轴的角度被禁止变得彼此相等，从而防止零电平被输出为解调输出。根据本发明的另一方面，差分PSK信号解调器包括用于从I轴电平鉴别装置（1）和Q轴电平鉴别装置（1）的输出判断信号点的变化轨迹的装置（24至34） 12）选择最佳路径，从而可以降低误码率（BER）。

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