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1. 发明公开

EP1001580A1 Demodulator for differential phase shift keying signal using a maximum likelihood sequence estimator 失效
标题翻译： Demodulatorfürphasenumgetastetes Signal mit Maximalwahrscheinlichkeits-Folgeschätzer
公开(公告)号：EP1001580A1
公开(公告)日：2000-05-17
申请号：EP00103523.7
申请日：1992-03-19
申请人： SONY CORPORATION
发明人： Sato, Teruo
IPC分类号： H04L27/227 , H04L25/03
CPC分类号： H04L27/2276 , H04L25/03273 , H04L27/2275
摘要： The present invention is directed to a differential phaseshift keying (PSK) signal demodulator in which an error rate provided when a signal modulated according to a π/4-shift DQPSK modulation system is demodulated can be improved. The differential PSK signal demodulator includes means (4 to 10) for judging changing traces of signal points from outputs of an I-axis level discriminating device (1) and a Q-axis level discriminating device (2) to select an optimum path, thus making it possible to reduce a bit error rate (BER).
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。差分PSK信号解调器包括用于从I轴电平识别装置（1）和Q轴电平鉴别装置（2）的输出判断信号点的变化轨迹的装置（4至10），以选择最佳路径可以降低误码率（BER）。

2. 发明公开

EP0637024A3 Magnetic reproducing apparatus with partial response decoder 失效
标题翻译：具有部分响应译码器的磁重放装置。
公开(公告)号：EP0637024A3
公开(公告)日：1998-03-25
申请号：EP94401752.4
申请日：1994-07-29
申请人： SONY CORPORATION
发明人： Sato, Teruo , Tonami, Yasuo
IPC分类号： G11B20/10
CPC分类号： G11B20/10009
摘要： A magnetic reproducing apparatus plays back a magnetic recording medium (2) on which digital data have been magnetically recorded through a partial response encoder (1). The magnetic reproducing apparatus includes a synchronizing signal data detector (3) for detecting a synchronizing signal data part from a reproduced signal data series, a transmission path characteristics estimator (4) for modeling an impulse response between a recording system (7) and a reproducing system (8) with the synchronizing signal data part detected by the synchronizing signal data detector (3) being used as a reference signal, and a decoder (5) for decoding a recorded signal data series according to a Viterbi algorithm based on a transmission model produced by the transmission path characteristics estimator (4).

3. 发明公开

EP0637024A2 Magnetic reproducing apparatus with partial response decoder 失效
标题翻译： MagnetischesWiedergabegerätmit Partial-Response-Decoder。
公开(公告)号：EP0637024A2
公开(公告)日：1995-02-01
申请号：EP94401752.4
申请日：1994-07-29
申请人： SONY CORPORATION
发明人： Sato, Teruo , Tonami, Yasuo
IPC分类号： G11B20/10
CPC分类号： G11B20/10009
摘要： A magnetic reproducing apparatus plays back a magnetic recording medium (2) on which digital data have been magnetically recorded through a partial response encoder (1). The magnetic reproducing apparatus includes a synchronizing signal data detector (3) for detecting a synchronizing signal data part from a reproduced signal data series, a transmission path characteristics estimator (4) for modeling an impulse response between a recording system (7) and a reproducing system (8) with the synchronizing signal data part detected by the synchronizing signal data detector (3) being used as a reference signal, and a decoder (5) for decoding a recorded signal data series according to a Viterbi algorithm based on a transmission model produced by the transmission path characteristics estimator (4).
摘要翻译：磁回放装置通过部分响应编码器（1）重放数字数据已被磁记录的磁记录介质（2）。磁再现装置包括用于从再现信号数据序列检测同步信号数据部分的同步信号数据检测器（3），用于对记录系统（7）和再现装置（7）之间的脉冲响应进行建模的传输路径特性估计器（4）使用由同步信号数据检测器（3）检测的同步信号数据部分的系统（8）作为参考信号;以及解码器（5），用于根据基于传输模型的维特比算法解码记录信号数据序列由传输路径特性估计器（4）产生。

4. 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.

5. 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）。

6. 发明授权

EP0504890B1 Demodulator for demodulating a pi/4-shift DQPSK signal 失效
标题翻译：解调器，用于解调一个π/ 4移键控DQPSK信号
公开(公告)号：EP0504890B1
公开(公告)日：2002-06-19
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

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