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1. 发明申请

WO1996011526A1 DIGITAL QAM AND VSB MODULATOR AND DEMODULATOR 审中-公开
标题翻译：数字QAM和VSB调制器和解调器
公开(公告)号：WO1996011526A1
公开(公告)日：1996-04-18
申请号：PCT/US1995012220
申请日：1995-09-29
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： SCIENTIFIC-ATLANTA, INC. , MONTREUIL, Leo
IPC分类号： H03C01/60
CPC分类号： H03C3/40 , H03C3/04 , H03D1/2245 , H03D1/2254 , H03D3/007 , H03D3/245 , H03D2200/0031 , H04L27/0008 , H04L27/02 , H04L27/38 , H04L27/3836 , H04N5/4401
摘要： A digital data demodulator/decoder (30) for either a quadrature amplitude (QAM) or vestigial sideband (VSB) modulated signal includes a quadrature detector (32, 33) feeding through digital filters (38, 39) to a decoder (50) which switches between the in-phase and quadrature outputs of the digital filters (38, 39).
摘要翻译：用于正交幅度（QAM）或残留边带（VSB）调制信号的数字数据解调器/解码器（30）包括通过数字滤波器（38,39）馈送到解码器（50）的正交检测器（32,33）在数字滤波器（38,39）的同相和正交输出之间切换。

2. 发明申请

WO2008084419A3 PREDISTORTION OF PULSE MODULATOR FOR CORRECTION OF SLEWING DISTORTION 审中-公开
标题翻译：脉冲调制器的预处理修正失真
公开(公告)号：WO2008084419A3
公开(公告)日：2008-08-28
申请号：PCT/IB2008050017
申请日：2008-01-04
申请人： NXP BV , VROMANS JAN S , DEKKERS JAN C A , DE JONG GERBEN W
发明人： VROMANS JAN S , DEKKERS JAN C A , DE JONG GERBEN W
IPC分类号： H03F1/32 , H03C3/04 , H03K7/10
CPC分类号： H03C3/04 , H03C5/00 , H03F1/3282
摘要： The present invention relates to a circuit arrangement and method of applying predistortion to a baseband signal used for modulating a pulse-shaped signal, wherein an envelope information of the baseband signal is detected and slewing distortions of the pulse- shaped signal are reduced by applying at least one of a phase modulation and a duty cycle 5 modulation to the baseband signal as additional predistortion in response to the detected envelope information. Thereby, slewing distortions in the pulse-shaped signal are removed or at least reduced.
摘要翻译：本发明涉及一种将预失真应用于用于调制脉冲信号的基带信号的电路装置和方法，其中基带信号的包络信息被检测并且脉冲形信号的回转失真通过施加在对基带信号进行相位调制和占空比5调制中的至少一个作为响应于检测到的包络信息的附加预失真。因此，脉冲形信号中的回转失真被去除或至少减少。

3. 发明申请

WO2015066309A2 SIDEBAND SUPPRESSION IN ANGLE MODULATED SIGNALS 审中-公开
标题翻译：角度调制信号中的边带抑制
公开(公告)号：WO2015066309A2
公开(公告)日：2015-05-07
申请号：PCT/US2014063126
申请日：2014-10-30
申请人： ZBW LLC
发明人： COWAN SAM
IPC分类号： H04L27/20 , H04B1/04
CPC分类号： H04L27/20 , H03C3/04 , H03C2200/0058 , H04B1/04 , H04L27/12
摘要： In an angle modulated radio transmitter, the total power is the same when modulated or unmodulated. Angle modulation produces multiple sideband pairs. The power in the sidebands is derived from the carrier. When a complex modulating waveform is used, the power (and therefore the amplitude) of the carrier varies. A system and method is provided for dramatically minimizing, to nearly zero, the bandwidth needed to transmit digital information using sideband suppression of angle modulated signals. The systems described use various techniques to suppress sideband pairs, leaving the carrier signal. The amplitude variations of the carrier are used to convey information. In some examples, techniques are used to filter and/or phase out one or more sideband pairs, leaving the carrier signal.
摘要翻译：在角度调制无线电发射机中，当调制或未调制时，总功率相同。角度调制产生多个边带对。边带的功率来源于载波。当使用复调制波形时，载波的功率（因此振幅）变化。提供了一种系统和方法，用于使用角度调制信号的边带抑制将数字信息传输所需的带宽大致最小化到接近零。所描述的系统使用各种技术来抑制边带对，留下载波信号。载波的幅度变化用于传送信息。在一些示例中，使用技术来过滤和/或去除一个或多个边带对，留下载波信号。

4. 发明申请

WO2008084419A2 ENHANCED PREDISTORTION FOR SLEWING CORRECTION 审中-公开
标题翻译：增强校正校正
公开(公告)号：WO2008084419A2
公开(公告)日：2008-07-17
申请号：PCT/IB2008/050017
申请日：2008-01-04
申请人： NXP B.V. , VROMANS, Jan, S. , DEKKERS, Jan, C., A. , DE JONG, Gerben, W.
发明人： VROMANS, Jan, S. , DEKKERS, Jan, C., A. , DE JONG, Gerben, W.
IPC分类号： H03K7/10 , H03K6/04 , H03C3/02
CPC分类号： H03C3/04 , H03C5/00 , H03F1/3282
摘要： The present invention relates to a circuit arrangement and method of applying predistortion to a baseband signal used for modulating a pulse-shaped signal, wherein an envelope information of the baseband signal is detected and slewing distortions of the pulse- shaped signal are reduced by applying at least one of a phase modulation and a duty cycle 5 modulation to the baseband signal as additional predistortion in response to the detected envelope information. Thereby, slewing distortions in the pulse-shaped signal are removed or at least reduced.
摘要翻译：本发明涉及一种将预失真应用于用于调制脉冲信号的基带信号的电路装置和方法，其中基带信号的包络信息被检测并且脉冲形信号的回转失真通过施加在对基带信号进行相位调制和占空比5调制中的至少一个作为响应于检测到的包络信息的附加预失真。因此，脉冲形信号中的回转失真被去除或至少减少。

5. 发明申请

WO1995027330A1 SYNCHRONOUS DETECTOR AND METHODS FOR SYNCHRONOUS DETECTION 审中-公开
标题翻译：同步调制器和同步调制方法
公开(公告)号：WO1995027330A1
公开(公告)日：1995-10-12
申请号：PCT/US1995004225
申请日：1995-04-05
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： SCIENTIFIC-ATLANTA, INC. , MONTREUIL, Leo
IPC分类号： H03D03/18
CPC分类号： H04L27/38 , H03C3/04 , H03C3/40 , H03D1/2245 , H03D1/2254 , H03D3/007 , H03D3/245 , H03D2200/0031 , H04L27/0008 , H04L27/02 , H04L27/3836 , H04N5/4401
摘要： A synchronous detector (200) has first and second mixer circuits (206, 208) and a voltage-controlled oscillator (212). The voltage-controlled oscillator provides a local oscillator signal directly to the second mixer circuit and indirectly to the first mixer circuit through a phase transformer (210). The output of the first and second mixer circuits are combined in a combiner circuitry (220) to produce a jitter cancelled output signal. The jitter cancelled output signal is filtered in a loop filter (214) and applied to the voltage-controlled oscillator to control the frequency and phase of the local oscillator signal. The combiner circuitry includes a summer (222) and a jitter cancellation filter (228). The jitter cancellation filter is preferably a high pass filter matched to spectrum of the signal detected. The output of the first mixer circuit is passed through the high pass filter into one input of the summer while the output of the second mixer circuit is passed to the second input of the summer. The output of the summer is passed to the loop filter.
摘要翻译：同步检测器（200）具有第一和第二混频器电路（206,208）和压控振荡器（212）。压控振荡器将本地振荡器信号直接提供给第二混频器电路，并通过相位变压器（210）间接地提供给第一混频器电路。第一和第二混频器电路的输出在组合器电路（220）中组合以产生抖动消除的输出信号。抖动消除的输出信号在环路滤波器（214）中被滤波，并且被施加到压控振荡器以控制本地振荡器信号的频率和相位。组合器电路包括加法器（222）和抖动消除滤波器（228）。抖动消除滤波器优选地是与所检测的信号的频谱匹配的高通滤波器。第一混频器电路的输出通过高通滤波器进入夏季的一个输入端，而第二混频器电路的输出被传递到夏季的第二输入端。夏季的输出将传递给环路滤波器。

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