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1.发明授权Digital receiver with system for controlling the operating mode of an adaptive equalizer 失效具有用于控制自适应均衡器的操作模式的系统的数字接收器公开(公告)号：US08265129B1
公开(公告)日：2012-09-11
申请号：US09078555
申请日：1998-05-14
IPC分类号： H04W4/00
CPC分类号： H04N5/4446 , H03D1/24 , H03D5/00 , H04B1/28 , H04L1/0054 , H04L27/0008 , H04L27/06 , H04L27/38 , H04N5/4401
摘要： A radio receiver for receiving a selected digital HDTV signal, irrespective of whether it is a complex-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal, using the same tuner. The tuner supplies a final IF signal in a 6 MHz frequency band, the lowest frequency of which is not appreciably more than 2.38 MHz. The final IF signal is digitized for synchrodyning to baseband, with the 2.375 MHz difference between the carrier frequencies of QAM and VSB signals being taken into account in the digital synchrodyning circuitry. The carrier frequencies of the QAM and VSB final IF signals are regulated to be submultiples of symbol frequency by applying automatic frequency and phase control signals developed in the digital circuitry to a local oscillator of the tuner. The presence of the pilot carrier accompanying a selected VSB HDTV signal is detected for automatically switching the radio receiver for operation in a VSB signal reception mode. The absence of pilot carrier accompanying a selected QAM HDTV signal is detected for automatically switching the radio receiver for operation in a QAM signal reception mode.
摘要翻译： 一种用于使用相同的调谐器接收所选数字HDTV信号的无线电接收机，而不管其是复调幅度调制（QAM）还是残留边带（VSB）信号。 调谐器在6 MHz频段提供最终的IF信号，其最低频率不会高于2.38 MHz。 最后的IF信号被数字化以与基带同步，其中在数字同步电路中考虑了QAM和VSB信号的载波频率之间的2.375MHz差。 通过将数字电路中开发的自动频率和相位控制信号应用于调谐器的本地振荡器，QAM和VSB最终IF信号的载波频率被调节为符号频率的分数。 检测伴随选定的VSB HDTV信号的导频载波的存在，以便自动切换无线电接收机以在VSB信号接收模式下操作。 检测到伴随选定的QAM HDTV信号的导频载波的缺失，用于自动切换无线电接收机以进行QAM信号接收模式的操作。
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2.发明授权Modulation device, demodulation device, modulation method and demodulation method 有权调制装置，解调装置，调制方式及解调方式公开(公告)号：US08121213B2
公开(公告)日：2012-02-21
申请号：US10565380
申请日：2004-07-26
IPC分类号： H03C1/52
CPC分类号： H04L27/2332 , H03C1/60 , H03D1/24 , H04B1/68 , H04L27/04 , H04L27/06 , H04L27/2053 , H04L27/2338
摘要： A modulation apparatus is disclosed that enables significant improvements in signal transmission rate in a limited frequency band as compared with conventional modulation schemes. The modulation apparatus has first and second frequency-increasing single side band (SSB) modulators. The modulators are configured to have respective carrier frequencies with a difference by a frequency corresponding to the symbol frequency (i.e. fundamental frequency of the input symbol). An adder combines a lower side band (LSB) signal obtained from the SSB modulator set for a higher carrier frequency, and an upper side band (USB) signal obtained from the SSB modulator set for a lower carrier frequency to obtain a modulation signal.
摘要翻译： 公开了一种与常规调制方案相比在有限频带中显着改善信号传输速率的调制装置。 调制装置具有第一和第二增频单边带（SSB）调制器。 调制器被配置为具有相应的载波频率，其频率与符号频率（即，输入符号的基频）相对应的频率。 加法器组合从用于较高载波频率的SSB调制器集获得的下边带（LSB）信号和从用于较低载波频率的SSB调制器获得的上边带（USB）信号，以获得调制信号。
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公开(公告)号：US07529535B2
公开(公告)日：2009-05-05
申请号：US10555269
申请日：2004-04-29
CPC分类号： H03D1/24 , H03D1/2281 , H04L27/066 , H04N5/455
摘要： A demodulator which is arranged to demodulate a first signal with the aid of a second signal, comprises a first bandpass (30) filter arranged to recover the first signal (36) from a received signal (10) and a second bandpass filter (32) arranged to recover the second signal (30) from the received signal (10). Wherein the passband of the second bandpass filter (32) is substantially narrower than the passband of the first bandpass filter (30).
摘要翻译： 一种解调器，其被配置为借助于第二信号来解调第一信号，包括第一带通滤波器，被配置为从接收信号（10）和第二带通滤波器（32）恢复第一信号（36） 被布置成从接收信号（10）恢复第二信号（30）。 其中第二带通滤波器（32）的通带基本上比第一带通滤波器（30）的通带窄。
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公开(公告)号：US20030102906A1
公开(公告)日：2003-06-05
申请号：US10274447
申请日：2002-10-18
申请人： NIPPON HOSO KYOKAI
IPC分类号： H03D001/00
CPC分类号： H03D1/24
摘要： To improve the quality of the demodulated signal without altering the form in which an AM radio wave is transmitted, the received amplitude-modulated signal is converted to a single-sideband signal, and the information signal demodulated from the phase term of this converted single-sideband signal.
摘要翻译： 为了提高解调信号的质量而不改变AM无线电波的形式，接收的幅度调制信号被转换为单边带信号，并且从该转换的单频带信号的相位解调的信息信号， 边带信号。
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5.发明申请公开(公告)号：US20020025782A1
公开(公告)日：2002-02-28
申请号：US09934870
申请日：2001-08-21
申请人： Yoji MAKISHIMA
发明人： Masaki Tatemori , Yoji Makishima
IPC分类号： H04B001/68
CPC分类号： H04B1/0092 , H03D1/24 , H04B1/005 , H04B1/302 , H04B1/68
摘要： An SSB radio communication system and radio apparatus applicable to ultra high frequencies such as a VHF band and UHF band. In the transmitting side, a carrier wave is amplitude modulated by modulation input signals which comprise a constant amplitude, sine wave shaped reference pulse having a predetermined width and period and a sine wave shaped modulation pulse signal having an amplitude representing two- or multi-value digital values having the same width as the reference pulse signal and which are formed based on the amplitude of the reference pulse signal, and the modulated pulse signals are transmitted on a single side band, while in its receiving side the gain of received signals is automatically adjusted based on the reference pulse signal that is the value of the peak of the received signals. Further, in the transmitting side, the period or frequency of the reference pulse signal is also formed in synchronism with the carrier wave frequency, and in the receiving side, a local carrier wave frequency to be given to a demodulator is determined based on the period of frequency of the reference pulse signal.
摘要翻译： 适用于超高频（如VHF频带和UHF频段）的SSB无线电通信系统和无线电设备。 在发送侧，载波通过调制输入信号进行幅度调制，该调制输入信号包括具有预定宽度和周期的恒定振幅正弦波形参考脉冲和具有表示二值或多值的振幅的正弦波形调制脉冲信号 具有与参考脉冲信号相同的宽度并且基于参考脉冲信号的幅度形成的数字值，并且调制的脉冲信号在单个边带上发送，而在其接收侧中，接收信号的增益被自动地 基于作为接收信号的峰值的参考脉冲信号进行调整。 此外，在发送侧，参考脉冲信号的周期或频率也与载波频率同步地形成，并且在接收侧中，基于周期来确定给予解调器的本地载波频率 的参考脉冲信号的频率。
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6.发明授权Radio receivers for receiving both VSB and QAM digital television signals with carriers offset by 2.69 MHz 失效用于接收VSB和QAM数字电视信号的无线电接收机，载波被2.69MHz偏移公开(公告)号：US06333767B1
公开(公告)日：2001-12-25
申请号：US09066893
申请日：1998-04-28
IPC分类号： H04N327
CPC分类号： H04N5/4446 , H03D1/24 , H03D5/00 , H04B1/28 , H04L1/0054 , H04L27/02 , H04N5/4401 , H04N5/455
摘要： A radio receiver uses the same tuner for receiving a selected digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal. The tuner supplies a final IF signal in a 6-MHz-wide frequency band, the lowest frequency of which is not appreciably more than 2.69 MHz. The final IF signal is digitized at a rate that is a multiple of both the symbol frequencies of the QAM and VSB signals, for synchrodyning to baseband, with the 2.69 MHz difference between the carrier frequencies of QAM and VSB signals being taken into account in the digital synchrodyning circuitry. The carrier frequencies of the QAM and VSB final IF signals are regulated to be submultiples of the multiple of both the symbol frequencies of the QAM and VSB signals by applying automatic frequency and phase control signals developed in the digital circuitry to a local oscillator of the tuner.
摘要翻译： 无线电接收机使用相同的调谐器来接收选择的数字电视（DTV）信号，而不管它是正交幅度调制（QAM）还是残留边带（VSB）信号。 调谐器在6MHz宽的频带中提供最终的IF信号，其最低频率不大于2.69MHz。 最后的IF信号以QAM和VSB信号的符号频率的倍数的数字化数字化，用于同步到基带，QAM和VSB信号的载波频率之间的2.69 MHz差异被考虑在 数字同步电路。 将QAM和VSB最终IF信号的载波频率通过将在数字电路中产生的自动频率和相位控制信号应用于调谐器的本地振荡器来调节为QAM和VSB信号的符号频率的倍数的分数 。
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7.发明授权System for controlling the operating mode of an adaptive equalizer within a digital TV signal receiver 失效用于控制数字TV信号接收机内的自适应均衡器的操作模式的系统
公开(公告)号：US5999223A
公开(公告)日：1999-12-07
申请号：US59345
申请日：1998-04-14
CPC分类号： H04N5/4446 , H03D1/24 , H03D5/00 , H04B1/28 , H04L1/0054 , H04L27/02 , H04N5/4401 , H04N5/455
摘要： A radio receiver for receiving a selected DTV signal that can be a quadrature-amplitude-modulation (QAM) signal or a vestigial sideband (VSB) signal synchrodynes the received signal to baseband and supplies the baseband signal to an adaptive equalizer. The presence of the pilot carrier accompanying a selected VSB DTV signal is detected for automatically switching the radio receiver for operation in a VSB signal reception mode, in which operating mode the adaptive equalizer is conditioned to respond to training signals included in the initial data segment of each data field of the VSB signal. The absence of pilot carrier accompanying a selected QAM DTV signal is detected for automatically switching the radio receiver for operation in a QAM signal reception mode, in which operating mode the adaptive equalizer is conditioned to operate without relying on the training signals included in the VSB signal.
摘要翻译： 用于接收可以是正交幅度调制（QAM）信号或残留边带（VSB）信号的所选择的DTV信号的无线电接收机将接收的信号同步到基带，并将基带信号提供给自适应均衡器。 检测伴随选定的VSB DTV信号的导频载波的存在，以便在VSB信号接收模式中自动切换无线电接收机以进行操作，其中自适应均衡器被操作以响应包括在初始数据段中的训练信号 VSB信号的每个数据字段。 检测到伴随选定的QAM DTV信号的导频载波的不存在用于自动切换无线电接收机以在QAM信号接收模式中操作，其中自适应均衡器被调节为操作的操作模式，而不依赖于包括在VSB信号中的训练信号 。
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8.发明授权Decimation of baseband DTV signals prior to channel equalization in digital television signal receivers 失效在数字电视信号接收机的信道均衡之前抽取基带DTV信号
公开(公告)号：US5966188A
公开(公告)日：1999-10-12
申请号：US21946
申请日：1998-02-11
CPC分类号： H04N5/4446 , H03D1/24 , H03D5/00 , H04B1/28 , H04L1/0054 , H04L1/0071 , H04N5/4401 , H04N5/455
摘要： A radio receiver uses the same tuner for receiving a selected digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal. The final IF signal is digitized at a rate that is a multiple of both the symbol frequencies of the QAM and VSB signals, for synchrodyning to baseband. The carrier frequencies of the QAM and VSB final IF signals are regulated to be submultiples of the multiple of both the symbol frequencies of the QAM and VSB signals by applying automatic frequency and phase control (AFPC) signals developed in the digital circuitry to a local oscillator of the tuner. Baseband DTV signals obtained by synchrodyning the final IF signals have a sample rate higher than symbol rate to facilitate symbol synchronization. The baseband DTV signals are decimated to symbol rate before performing channel equalization to reduce the number of multipliers required in the channel equalization filter.
摘要翻译： 无线电接收机使用相同的调谐器来接收选择的数字电视（DTV）信号，而不管它是正交幅度调制（QAM）还是残留边带（VSB）信号。 最后的IF信号以QAM和VSB信号的符号频率的倍数的速率被数字化，用于与基带同步。 通过将在数字电路中开发的自动频率和相位控制（AFPC）信号应用于本地振荡器，QAM和VSB最终IF信号的载波频率被调节为QAM和VSB信号的符号频率的倍数的倍数 的调谐器。 通过同步最终IF信号获得的基带DTV信号具有高于符号率的采样率，以促进符号同步。 在执行信道均衡之前，将基带DTV信号抽取到符号速率，以减少信道均衡滤波器中所需的乘法器数量。
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9.发明授权Reception mode control in radio receivers for receiving both VSB and QAM digital television signals 失效用于接收VSB和QAM数字电视信号的无线电接收机中的接收模式控制
公开(公告)号：US5959699A
公开(公告)日：1999-09-28
申请号：US82530
申请日：1998-05-21
CPC分类号： H04N5/4446 , H03D1/24 , H03D5/00 , H04B1/28 , H04H20/95 , H04H40/27 , H04L1/0054 , H04L27/0008 , H04L27/063 , H04L27/066 , H04L27/38 , H04L27/3827 , H04N5/4401 , H04N5/455 , H04L2027/0028 , H04L2027/0055 , H04L2027/0057 , H04L2027/0067 , H04L2027/0087 , H04L27/0012 , H04N5/46 , H04N7/08
摘要： A radio receiver uses the same tuner for receiving a selected digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal. The tuner supplies a final IF signal in a 6-MHz-wide frequency band, the lowest frequency of which is not appreciably more than 2.69 MHz. The final IF signal is digitized at a rate that is a multiple of both the symbol frequencies of the QAM and VSB signals, for synchrodyning to baseband, with the 2.69 MHz difference between the carrier frequencies of QAM and VSB signals being taken into account in the digital synchrodyning circuitry. The carrier frequencies of the QAM and VSB final IF signals are regulated to be submultiples of the multiple of both the symbol frequencies of the QAM and VSB signals by applying automatic frequency and phase control signals developed in the digital circuitry to a local oscillator of the tuner.
摘要翻译： 无线电接收机使用相同的调谐器来接收选择的数字电视（DTV）信号，而不管它是正交幅度调制（QAM）还是残留边带（VSB）信号。 调谐器在6MHz宽的频带中提供最终的IF信号，其最低频率不大于2.69MHz。 最后的IF信号以QAM和VSB信号的符号频率的倍数的数字化数字化，用于同步到基带，QAM和VSB信号的载波频率之间的2.69 MHz差异被考虑在 数字同步电路。 将QAM和VSB最终IF信号的载波频率通过将在数字电路中产生的自动频率和相位控制信号应用于调谐器的本地振荡器来调节为QAM和VSB信号的符号频率的倍数的分数 。
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10.发明授权Carrier independent timing recovery system for a vestigial sideband modulated signal 失效载波独立定时恢复系统，用于残留边带调制信号
公开(公告)号：US5805242A
公开(公告)日：1998-09-08
申请号：US704787
申请日：1996-09-06
IPC分类号： H03D1/22 , H03D1/24 , H04L25/03 , H04L25/06 , H04L27/02 , H04L27/06 , H04N5/21 , H04N5/44 , H04N5/455 , H04L27/16
CPC分类号： H04L7/0278 , H03D1/24 , H04L25/0305 , H04L25/0307 , H04L25/061 , H04L25/067 , H04L27/02 , H04L27/066 , H04N21/4382 , H04N5/211 , H04N5/455 , H03D1/2254 , H04L2025/03382 , H04L2025/0363 , H04N5/4401
摘要： A television signal receiver for processing an HDTV signal transmitted in a vestigial sideband (VSB) format includes input complex filters shared by a timing recovery network (30) and a carrier recovery network (50). The filter network includes a pair of upper and lower band edge filters (20, 22) mirror imaged around the upper and lower band edges of the VSB signal for producing suppressed subcarrier AM output signals. The timing recovery network includes a phase detector (28, 38, 62) and responds to an AM signal derived from the two filters (via 26) for synchronizing a system clock (CLK). The carrier recovery network (50) also includes a phase detector (54, 60, 62, 64), and responds to outputs from one or both of the filters for producing an output error signal (.DELTA.) representing a phase/frequency offset of the VSB signal. The error signal is used to reduce or eliminate the offset to produce a recovered baseband or near baseband signal. A subsequent equalizer eliminates any residual phase offsets in the recovered signal.
摘要翻译： PCT No.PCT / US95 / 03131 Sec。 371日期1996年9月6日 102（e）1996年9月6日PCT PCT 1995年3月13日PCT公布。 公开号WO95 / 26074 日期1995年9月28日用于处理以残留边带（VSB）格式发送的HDTV信号的电视信号接收机包括由定时恢复网络（30）和载波恢复网络（50）共享的输入复合滤波器。 滤波器网络包括一对在VSB信号的上和下边缘边缘成像的上下边缘滤波器（20,22），用于产生抑制的副载波AM输出信号。 定时恢复网络包括相位检测器（28,38,62），并响应从两个滤波器（经由26）得到的用于同步系统时钟（CLK）的AM信号。 载波恢复网络（50）还包括相位检测器（54,60,62,64），并对来自一个或两个滤波器的输出进行响应，以产生表示相位/频率偏移的输出误差信号（DELTA） VSB信号。 误差信号用于减少或消除偏移以产生恢复的基带或近基带信号。 随后的均衡器消除了恢复信号中的任何残留相位偏移。
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