专利检索 ipc:"H04H20/36" 第 1 页

1.

发明公开
METHOD AND APPARATUS FOR PULSE OVERLAP PRE-COMPENSATION IN DIGITALLY MODULATED SIGNALS 审中-公开
标题翻译：方法和装置IMPULSÜBERLAPPUNGSVORKOMPENSATION在数字调制信号

公开(公告)号：EP1456991A4

公开(公告)日：2009-06-24

申请号：EP02794173

申请日：2002-12-06

申请人： IBIQUITY DIGITAL CORP

发明人： KROEGER BRIAN W , BRONDER JOSEPH B

IPC分类号： H04J11/00 , H04L25/03 , H04H20/36 , H04H60/07 , H04L27/26

CPC分类号： H04H60/07 , H04H20/36 , H04L25/03343 , H04L27/2627 , H04L2025/03414

摘要： A method of pre-compensating for pulse overlap in a digitally modulated signal comprises the steps of receiving a sequence of pulses, (62) modulating the first sequence of pulses to produce a first sequence of demodulated pulses, (68) demodulating the first sequence of modulated pulses to produce a first sequence of demodulated pulses, (70) combining the first sequence of demodulated pulses with the first sequence of pulses to produce a first sequence of error pulses, (74) modulating the first sequence of error pulses to produce a first sequence of modulated error pulses, and (78) combining the first sequence of modulated error pulses with the first sequence of modulated pulses to produce a first sequence of compensated pulses.

2.

发明授权
VERFAHREN UND VORRICHTUNG ZUR ÜBERTRAGUNG VON ZUSATZDATEN, BEZÜGLICH ALTERNATIVER DIGITALER SENDEFREQUENZEN, IN EINEM ANALOGEN RUNDFUNKÜBERTRAGUNGSSYSTEM 有权
标题翻译：方法和装置用于转移额外的数据，涉及备选数字传输频率，在模拟广播系统

公开(公告)号：EP1784934B1

公开(公告)日：2012-09-26

申请号：EP05753998.3

申请日：2005-05-31

申请人： ROBERT BOSCH GMBH

发明人： LAUTERBACH, Thomas , HOFMANN, Frank

IPC分类号： H04H20/22 , H04H20/36

CPC分类号： H04H20/36 , H04H20/22

3.

发明公开
AM COMPATIBLE DIGITAL WAVEFORM FRAME TIMING RECOVERY AND FRAME SYNCHRONOUS POWER MEASUREMENT 失效
标题翻译：兼容下的一个数字波形卒中恢复和帧同步绩效衡量

公开(公告)号：EP0956675A4

公开(公告)日：2002-01-30

申请号：EP96928970

申请日：1996-08-21

申请人： USA DIGITAL RADIO INC

发明人： CARLIN BARRY W , DAPPER MARK J , GEILE MICHAEL J

IPC分类号： H04J11/00 , H04H20/36 , H04H20/49 , H04H40/27 , H04L5/02 , H04L7/00 , H04L27/26 , H04H1/00 , H04L27/14 , H04L27/16 , H04L27/22

CPC分类号： H04H20/36 , H04H20/49 , H04H40/27 , H04H2201/186 , H04H2201/20 , H04L5/023 , H04L27/2602 , H04L27/2656 , H04L27/2662

摘要： In a broadcast system having a complex waveform of digital and analog segments, frame timing is recovered (290) and the frame synchronous power (284) of the digital portion of the composite AM compatible Digital Audio Broadcast (DAB) waveform is measured by examining a portion of the signal (284). The frame timing necessary for proper demodulation is recovered from the received signal (200), and a signal power measurement for scaling (242) is provided (294). The composite AM compatible DAB waveform is produced by a modulation method in which a digital representation of an audio signal is encoded together with an analog amplitude modulated (AM) signal and transmitted simultaneously in the same frequency channel.