公开(公告)号：EP1926268A2

公开(公告)日：2008-05-28

申请号：EP07113912.5

申请日：2007-08-07

申请人： Samsung Electronics Co., Ltd.

发明人： Kim, Hyun-chin ,  Choi, Woo-young ,  Seo, Young-kwang ,  Kim, Du-ho

IPC分类号： H04L27/22

CPC分类号： H04L27/22 ,  H04L27/0014 ,  H04L27/2275 ,  H04L27/2338 ,  H04L2027/0036 ,  H04L2027/0057 ,  H04L2027/0069 ,  H04L2027/0085

摘要： A demodulation method using phase detection and a corresponding apparatus are provided. The demodulation method includes detecting phase information by sampling a received signal, synchronizing at least one clock signal by using the detected phase information, oversampling the received signal by the synchronized clock signal, and demodulating the received signal by using the oversampled result. In this way, the demodulating apparatus can demodulate the modulated signal, and use a digital filter for removing a jitter.

摘要翻译： 提供了使用相位检测的解调方法和相应的装置。 解调方法包括通过对接收到的信号进行采样来检测相位信息，通过使用所检测的相位信息使至少一个时钟信号同步，通过同步的时钟信号对接收的信号进行过采样，以及通过使用过采样结果来解调接收的信号。 以这种方式，解调装置可以对调制信号进行解调，并使用数字滤波器去除抖动。

公开(公告)号：EP1794966A2

公开(公告)日：2007-06-13

申请号：EP05804002.3

申请日：2005-09-30

申请人： Efficient Channel Coding Inc.

发明人： THESLING, William ,  MO, Fan

IPC分类号： H04L27/22

CPC分类号： H04L7/10 ,  H04L7/04 ,  H04L27/0014 ,  H04L27/2275 ,  H04L2027/003 ,  H04L2027/0034 ,  H04L2027/0036 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04L2027/0095

摘要： Novel receiver systems and methods are disclosed to facilitate coarse frequency and frame recovery in an adaptive or otherwise variable coding system. Information contained in a header may be used to estimate and minimize phase and frequency errors The header information may also be used to adjust phase estimates. Phase and frequency information may thereafter be corrected using adaptive phase and frequency synchronization techniques on frame-by-frame basis.

公开(公告)号：EP0913963B1

公开(公告)日：2006-07-26

申请号：EP98120086.8

申请日：1998-10-23

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Okubo, Seiji ,  Fujimura, Akinori ,  Miyake, Makoto

IPC分类号： H04L7/033 ,  H03L7/095

CPC分类号： H04L27/2332 ,  H03L7/095 ,  H03L7/107 ,  H04L7/033 ,  H04L7/046 ,  H04L2027/003 ,  H04L2027/0036

公开(公告)号：EP1330088B1

公开(公告)日：2006-02-01

申请号：EP03009280.3

申请日：1993-03-26

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Oshima, Mitsuaki

IPC分类号： H04L27/26

CPC分类号： H04L1/0057 ,  H03M13/23 ,  H03M13/253 ,  H03M13/256 ,  H03M13/2936 ,  H03M13/35 ,  H03M13/356 ,  H03M13/6538 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0054 ,  H04L1/0058 ,  H04L1/0059 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/007 ,  H04L5/0007 ,  H04L5/0046 ,  H04L27/02 ,  H04L27/04 ,  H04L27/183 ,  H04L27/2602 ,  H04L27/2604 ,  H04L27/2627 ,  H04L27/2649 ,  H04L27/3405 ,  H04L27/3488 ,  H04L27/36 ,  H04L27/38 ,  H04L27/3854 ,  H04L2001/0098 ,  H04L2027/0036 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04N5/4401 ,  H04N5/455 ,  H04N7/015 ,  H04N7/24 ,  H04N11/004 ,  H04N19/30 ,  H04N19/37 ,  H04N19/60 ,  H04N19/63 ,  H04N21/234327 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/440272 ,  H04N21/44209 ,  H04N21/4425 ,  H04N21/4621 ,  H04N21/631

公开(公告)号：EP1523146A2

公开(公告)日：2005-04-13

申请号：EP04022606.0

申请日：2004-09-22

申请人： Micronas GmbH

发明人： Bock, Christian, Dr.

IPC分类号： H04L27/38

CPC分类号： H04L27/38 ,  H04L27/227 ,  H04L2027/0032 ,  H04L2027/0036

摘要： Die Erfindung bezieht sich auf ein Verfahren zum Synchronisieren einer Schaltungsanordnung (1) beim Empfang eines in den mehrdimensionalen komplexen Signalraum gemischten, modulierten Signals (sa, sd, A ) in insbesondere einem QAM-Empfänger, bei dem mit einem Entscheider (15, 15', 15*) durch Analyse des Empfangssignals im komplexen Koordinatenraum (I, Q) unter Verwendung von Regelungsparametern (ΔR, ρ, t i ) ein Symbol (S) entschieden wird und zumindest einer der Regelungsparameter (ΔR, ρ, t i ) für spätere Entscheidungen angepasst wird.
Zur Verbesserung des Verfahrens, insbesondere schnelleren Bereitstellung eines entschiedenen Symbols ohne lange Verzögerungen durch die Komponenten der Regelungsschleife wird vorgeschlagen, dass dem Entscheider (15',15*) ein vorläufiger, insbesondere geschätzter Korrekturwinkel für eine momentane Rotation unabhängig von einer Regelung eines lokalen Oszillators als Regelungsparameter (ρ) zugeführt wird.

摘要翻译： 解调器（1）在一个信号源（2），E G的条目上的模拟信号（SA）拾取 调谐器。 该模拟信号是一般在频带被限制的中频的位置和在（3），用于转换模拟 - 数字转换器（ADC）馈送到转换成数字信号（SD），以由ADC到带通滤波器（5）被引导。 因此独立claimsoft包括用于电路结构的电路进行同步。

公开(公告)号：EP1067785B1

公开(公告)日：2005-03-30

申请号：EP00114281.9

申请日：2000-07-04

申请人： Thomson Licensing S.A.

发明人： Bouillet, Aaron Reel ,  White, David Glen

IPC分类号： H04N5/455 ,  H04N5/12

CPC分类号： H03L7/091 ,  H03L7/10 ,  H03L2207/06 ,  H04L25/03019 ,  H04L27/066 ,  H04L2025/03598 ,  H04L2025/03732 ,  H04L2027/0036 ,  H04L2027/0038 ,  H04L2027/0087 ,  H04N5/126

公开(公告)号：EP1035697B9

公开(公告)日：2005-01-12

申请号：EP00114578.8

申请日：1993-09-24

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Oshima, Mitsuaki

IPC分类号： H04L27/02 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34

CPC分类号： H04L1/0059 ,  H03M13/256 ,  H03M13/356 ,  H04L1/004 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/006 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/02 ,  H04L27/04 ,  H04L27/183 ,  H04L27/2602 ,  H04L27/2604 ,  H04L27/3488 ,  H04L27/3854 ,  H04L2027/0036 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04N5/4401 ,  H04N5/455 ,  H04N7/015 ,  H04N7/24 ,  H04N11/004 ,  H04N19/00 ,  H04N19/30 ,  H04N19/37 ,  H04N19/63 ,  H04N21/234327 ,  H04N21/2365 ,  H04N21/2383 ,  H04N21/4347 ,  H04N21/4382 ,  H04N21/440227 ,  H04N21/64792

摘要： At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of subchannels, wherein the subchannels are differentiated by changing the length of a guard time slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.

公开(公告)号：EP1035695B9

公开(公告)日：2005-01-12

申请号：EP00114575.4

申请日：1993-09-24

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Oshima, Mitsuaki

IPC分类号： H04L27/02 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34

CPC分类号： H04L1/0059 ,  H03M13/256 ,  H03M13/356 ,  H04L1/004 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/006 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/02 ,  H04L27/04 ,  H04L27/183 ,  H04L27/2602 ,  H04L27/2604 ,  H04L27/3488 ,  H04L27/3854 ,  H04L2027/0036 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04N5/4401 ,  H04N5/455 ,  H04N7/015 ,  H04N7/24 ,  H04N11/004 ,  H04N19/00 ,  H04N19/30 ,  H04N19/37 ,  H04N19/63 ,  H04N21/234327 ,  H04N21/2365 ,  H04N21/2383 ,  H04N21/4347 ,  H04N21/4382 ,  H04N21/440227 ,  H04N21/64792

摘要： At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of subchannels, wherein the subchannels are differentiated by changing the length of a guard time slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.

公开(公告)号：EP1463253A1

公开(公告)日：2004-09-29

申请号：EP03290760.2

申请日：2003-03-26

申请人： ALCATEL

发明人： Milani, Renato ,  Verbana, Gianfranco ,  Spalvieri, Arnaldo ,  Albanese, Matteo ,  Rinaldi, Ivan

IPC分类号： H04L27/00

CPC分类号： H04L27/0014 ,  H04L2027/0018 ,  H04L2027/0028 ,  H04L2027/0036 ,  H04L2027/0057

摘要： Method and system for frequency synchronization in an optical telecommunication system, preferably in a free space optics (FSO) system, wherein a carrier signal is generated at the transmitter side by means of a modulator used for modulating the information bearing signal such that the frequency of said carrier signal (44) is derived from the clock frequency (23) of the information bearing signal itself, or a multiple thereof; and wherein at the receiver side the received information bearing signal is demodulated by a demodulator by multiplying it by the carrier signal in such a way that the frequency of carrier signal is derived from the clock frequency of the information bearing signal recovered at the demodulator itself or a multiple thereof.

摘要翻译： 通过用于调制信息承载检查信号的调制器的方式在发射机侧，生成用于在光通信系统的频率同步，优选地在自由空间光学器件（FSO）系统，worin的载波信号的方法和系统做了的频率 所述载波信号（44）从所述信息承载信号本身，或者其倍数的时钟频率（23）导出的; 和worin在接收器侧所接收的信息承载信号由解调器通过在寻求一种方式由所述载波信号乘以解调做载波信号的频率从在解调器本身或恢复的信息承载信号的时钟频率导出 其倍数。

公开(公告)号：EP1463233A2

公开(公告)日：2004-09-29

申请号：EP04015313.2

申请日：2003-10-22

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Nakahara, Hideki ,  Tanaka, Koichiro ,  Mori, Kenichi ,  Urabe, Yoshio ,  Takai, Hitoshi

IPC分类号： H04L7/04 ,  H04L27/233

CPC分类号： H04L7/041 ,  H04L7/0334 ,  H04L7/046 ,  H04L27/2332 ,  H04L2027/0036 ,  H04L2027/0067 ,  H04L2027/0095

摘要： A detected signal (111) contains a preamble portion which includes symbol alternations, followed by a unique word portion, and a data portion. The unique word is selected to minimize the probability of erroneously detecting symbol alternations due to symbol errors. Each time a symbol alternation is detected, a correction value calculation section (102) averages the phase shift in the detected signal (111) for a predetermined length, thereby calculating a correction value (115). The correction value determination section (103) stores a plurality of correction values (115) in a chronological order. When the unique word portion is detected, the correction value determination section (103) retains, as an effective correction value (118), a correction value which is arrived at by going back a predetermined number of correction values among the stored correction values. A phase rotation section (104) corrects the phase of the detected signal (111) by using an effective correction value (118) calculated by the correction value determination section (103).

摘要翻译： 检测信号（111）包含前导码部分，其包括符号替换，后面是唯一字部分和数据部分。 选择唯一的字以最小化由于符号错误而错误地检测符号变化的概率。 每当检测到符号交替时，校正值计算部（102）将检测信号（111）中的相移平均为预定长度，由此计算校正值（115）。 校正值确定部分（103）以时间顺序存储多个校正值（115）。 当检测到唯一字部分时，校正值确定部分（103）保留通过在所存储的校正值中返回预定数量的校正值而得到的校正值作为有效校正值（118）。 相位旋转部（104）通过使用由校正值确定部（103）计算的有效校正值（118）来校正检测信号（111）的相位。