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公开(公告)号：US06587503B1
公开(公告)日：2003-07-01
申请号：US09455245
申请日：1999-12-06
IPC分类号： H04B1700
CPC分类号： H04B7/18523
摘要： An information processing apparatus in which an eye center measuring unit determines a code judgment point from a peak timing signal supplied from a timing signal generation circuit and an amplitude signal supplied from an interpolator and detected by an amplitude detector, and outputs it to a multiplier via an amplifier, a subtracter, and a reciprocal generating unit. A zero cross point measuring unit determines a code change point from a zero cross timing signal supplied from a timing signal generation circuit and an amplitude signal supplied from the interpolator and detected by the amplitude detector, and outputs it to the multiplier via a subtracter. The multiplier multiplies the supplied signals, and a dB converter converts a supplied signal into a signal in decibels and outputs the signal to a display circuit.
摘要翻译： 一种信息处理装置，其中眼睛中心测量单元根据从定时信号产生电路提供的峰值定时信号和由内插器提供并由振幅检测器检测的振幅信号来确定码判断点，并通过振幅检测器将其输出到乘法器 放大器，减法器和互逆生成单元。 零交叉点测量单元从由定时信号发生电路提供的零交叉定时信号和从内插器提供并由幅度检测器检测的振幅信号确定代码变化点，并通过减法器将其输出到乘法器。 乘法器将所提供的信号相乘，并且dB转换器将提供的信号转换成分贝的信号，并将该信号输出到显示电路。
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公开(公告)号：US07779442B1
公开(公告)日：2010-08-17
申请号：US09623780
申请日：1999-09-30
CPC分类号： H04N21/435 , H04N7/10 , H04N7/17354 , H04N21/235 , H04N21/23608 , H04N21/2362 , H04N21/4344 , H04N21/4345 , H04N21/4432
摘要： This invention relates to an information delivery system and method, an information transmission apparatus and method, and an information receiving apparatus and method for delivering a digital multi-channel service signal through a satellite and a cable network. A QPSK demodulation circuit demodulates an inputted TS and outputs it to an error correction circuit. The error correction circuit corrects the inputted signal and outputs it to a network information (NIT) conversion circuit. The NIT conversion circuit replaces the NIT for CS waves with NIT for cable TV and outputs it to a QAM demodulation circuit. The QAM demodulation circuit demodulates the inputted signal and pouts it to a frequency conversion circuit. The frequency conversion circuit converts the frequency of the inputted signal into a predetermined value and outputs the signal to a signal mixer.
摘要翻译： 信息传递系统和方法，信息传输装置和方法以及用于通过卫星和有线网络发送数字多频道业务信号的信息接收装置和方法。 QPSK解调电路对输入的TS进行解调并将其输出到纠错电路。 误差校正电路校正输入信号并将其输出到网络信息（NIT）转换电路。 NIT转换电路用NIT替代用于有线电视的CS波的NIT，并将其输出到QAM解调电路。 QAM解调电路对输入的信号进行解调并将其截止到频率转换电路。 频率转换电路将输入信号的频率转换为预定值，并将该信号输出到信号混合器。
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公开(公告)号：US20050255844A1
公开(公告)日：2005-11-17
申请号：US11185562
申请日：2005-07-20
IPC分类号： H04B1/60 , H04B15/00 , H04L12/28 , H04W16/10 , H04W16/14 , H04W28/00 , H04W28/18 , H04W48/08 , H04W84/12
CPC分类号： H04W16/14 , H04B1/69 , H04B1/7163 , H04B1/7183 , H04W16/10 , H04W28/18 , H04W48/08
摘要： A communication system that permits the coexistence of a plurality of ultrawide band (UWB) radio communication networks that use different signal systems is achieved by using the same beacon signal and specifying the format of part of the control command among a plurality of UWB radio communication networks that use different signal systems, as defined, for example, by impulse period, impulse width, spreading ratio, and spreading code. When one UWB network receives a beacon signal from another UWB network, judging from the received beacon signal it grasps the transmission parameter that is used by another party and performs time-division on the transmission frame period for its own system.
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4.发明授权Radio communication system, and apparatus, method, and computer program for said radio communication system 有权无线电通信系统以及用于所述无线电通信系统的装置，方法和计算机程序公开(公告)号：US06980819B2
公开(公告)日：2005-12-27
申请号：US11185562
申请日：2005-07-20
IPC分类号： H04B1/60 , H04B15/00 , H04L12/28 , H04W16/10 , H04W16/14 , H04W28/00 , H04W28/18 , H04W48/08 , H04W84/12
CPC分类号： H04W16/14 , H04B1/69 , H04B1/7163 , H04B1/7183 , H04W16/10 , H04W28/18 , H04W48/08
摘要： A communication system that permits the coexistence of a plurality of ultrawide band (UWB) radio communication networks that use different signal systems is achieved by using the same beacon signal and specifying the format of part of the control command among a plurality of UWB radio communication networks that use different signal systems, as defined, for example, by impulse period, impulse width, spreading ratio, and spreading code. When one UWB network receives a beacon signal from another UWB network, judging from the received beacon signal it grasps the transmission parameter that is used by another party and performs time-division on the transmission frame period for its own system.
摘要翻译： 允许使用不同信号系统的多个超宽带（UWB）无线电通信网络共存的通信系统通过使用相同的信标信号并且在多个UWB无线电通信网络中指定控制命令的一部分的格式来实现 使用不同的信号系统，例如通过脉冲周期，脉冲宽度，扩频比和扩展码所定义的信号系统。 当一个UWB网络从另一个UWB网络接收到信标信号时，根据接收到的信标信号判断其掌握由另一方使用的传输参数，并对其自身的系统进行传输帧周期的时分。
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公开(公告)号：US4683586A
公开(公告)日：1987-07-28
申请号：US566899
申请日：1983-12-29
CPC分类号： H04K1/06
摘要： A scrambling system for an audio frequency signal is disclosed which employs a timebase-compressing and/or expanding system to measure the compressed and/or expanded amount of a segment time length caused in a transmission recording and reproducing system. In the scrambling system of the present invention, a marker signal is inserted into a portion between the adjoining segments and transmitted from an encoder side to a decoder side, while at the decoder side, this marker signal is detected, the synchronization is achieved by this marker signal along the compression and expansion of the segment length and the respective segments are rearranged to the original correct order. Thus, the connected portion between the segments can be made smooth so that it is possible to obtain the scrambling system for an audio frequency signal having high accuracy and high reliability.
摘要翻译： 公开了一种用于音频信号的加扰系统，其采用时基压缩和/或扩展系统来测量在传输记录和再现系统中引起的段时间长度的压缩和/或扩展量。 在本发明的加扰系统中，标记信号被插入相邻段之间的部分并从编码器侧传送到解码器侧，而在解码器侧检测到该标记信号，通过该同步被实现 沿着段长度的压缩和扩展的标记信号和相应的段被重新排列成原始的正确顺序。 因此，可以使分段之间的连接部分平滑，从而可以获得具有高精度和高可靠性的音频信号的加扰系统。
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公开(公告)号：US3939425A
公开(公告)日：1976-02-17
申请号：US506691
申请日：1974-09-17
申请人： Masakatsu Toyoshima
发明人： Masakatsu Toyoshima
CPC分类号： H03G3/34 , H03D1/2281
摘要： A noise-squelching circuit in which a phase-locked loop supplies an identifiable output signal that distinguishes between those times when the voltage-controlled oscillator in the loop is locked onto an incoming carrier, and those times when it is not. This identifiable signal controls a muting circuit to allow the information modulated onto the incoming carrier to pass through the muting circuit to an output terminal only when the loop is locked to an incoming signal but not when the loop is not locked onto a carrier.
摘要翻译： 一种噪声抑制电路，其中锁相环提供可识别的输出信号，其区分当环路中的压控振荡器锁定到输入载波上的那些时间，以及当不存在的时间。 该可识别信号控制静音电路，以便仅当环路被锁定到输入信号时才允许调制到输入载波上的信息通过静音电路到达输出端子，而不是当环路未锁定到载波上时。
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公开(公告)号：US4958381A
公开(公告)日：1990-09-18
申请号：US148591
申请日：1988-01-26
申请人： Masakatsu Toyoshima
发明人： Masakatsu Toyoshima
IPC分类号： H04N7/173
CPC分类号： H04N7/173 , H04N2007/17372 , H04N2007/17381
摘要： An information transmitting system capable of two way communication, suitable for use in transmitting information signals between a central control unit and a plurality of terminal apparatus units. Each terminal apparatus unit may be located at a different passenger seat in an aircraft, a train, a bus, or the like. The signals transmitted from each terminal apparatus to the central control unit are transmitted by way of two channels. In one operating mode, one channel is used as a random access channel, and the other is used as a polling channel. When polling transmission is not effected, the polling channel is used as a second random access channel, so that the system may efficiently transmit many information signals on two random access channels.
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公开(公告)号：US4298989A
公开(公告)日：1981-11-03
申请号：US111188
申请日：1980-01-11
CPC分类号： H03J5/0281 , H03J1/005
摘要： In tuning apparatus, a sensor senses when a tune indicating signal has been produced by the IF section so as to enable an adjusting circuit to change the tuning condition of the apparatus by a predetermined frequency step and then to disable the adjusting circuit if the tune indicating signal still is sensed following this frequency change so as to maintain the last-attained tuning condition. Alternatively, if the tune indicating signal no longer is sensed after the tuning condition has been changed by the predetermined frequency step, the tuning section is returned to its preceding tuning condition by this predetermined frequency step. Consequently, if the received signal is a high level signal at a frequency within a predetermined range from a broadcast frequency, the tune indicating signal is produced when the tuning condition of the tuning section differs from the broadcast frequency by this predetermined frequency step; and the tuning condition then is changed by this step so as to arrive at the desired broadcast frequency. If, however, the received signal is a low level signal, the tune indicating signal is produced only when the tuning condition of the tuning section coincides with a desired broadcast frequency, and then this tuning condition is changed by one step followed by a return of one step to the proper condition.
摘要翻译： 在调谐装置中，传感器感测IF部分何时产生乐曲指示信号，以使得调整电路能够以预定频率步长改变装置的调谐状态，然后如果调谐指示 在该频率变化之后仍然感测到信号，以便保持最后达到的调谐条件。 或者，如果在调谐条件已经改变了预定频率步长之后不再感测到调谐指示信号，则调谐部分通过该预定频率步长返回到其先前的调谐条件。 因此，如果接收到的信号是从广播频率的预定范围内的频率的高电平信号，则当调谐部分的调谐条件与广播频率不同的预定频率步长时，产生乐曲指示信号; 然后通过该步骤改变调谐条件，以达到所需的广播频率。 然而，如果接收到的信号是低电平信号，则仅当调谐部分的调谐条件与期望的广播频率一致时才产生调谐指示信号，然后将该调谐条件改变一个步骤，然后返回 一步到适当的条件。
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公开(公告)号：US3971986A
公开(公告)日：1976-07-27
申请号：US499211
申请日：1974-08-21
摘要： An information transmitting system including a transmitter and at least one receiver. The transmitter includes a modulator which is modulated by a first control signal intermittently, and whose center frequency is changed continuously in response to a second control signal. The receiver is provided with a frequency discriminator which demodulates the first and second control signals and the first control signal is applied as a first remotely controllable signal in digital fashion and the second control signal is applied as a second remotely controllable signal in analog fashion in the receiver.
摘要翻译： 一种包括发射机和至少一个接收机的信息发射系统。 发射机包括由第一控制信号间歇地调制并且其中心频率响应于第二控制信号而连续改变的调制器。 接收机设置有频率鉴别器，其对第一和第二控制信号进行解调，并且第一控制信号以数字方式作为第一遥控信号施加，并且第二控制信号以模拟方式施加在第二遥控信号中 接收器。
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公开(公告)号：US3939424A
公开(公告)日：1976-02-17
申请号：US503100
申请日：1974-09-04
申请人： Ikuo Shimizu , Masakatsu Toyoshima
发明人： Ikuo Shimizu , Masakatsu Toyoshima
CPC分类号： H03L7/10 , H03D1/2281
摘要： A radio receiver with a phase-locked loop demodulator is described. The phase-locked loop includes a phase comparator, a variable frequency (voltage-controlled) oscillator, and a low pass filter. The capture range and lock range of the phase-locked loop are controlled in response to the tuning of the loop. In an AM receiver with a phase-locked loop the variable frequency oscillator of the loop supplies a reference carrier for a synchronous detector which is phase-locked to a modulated carrier. A band pass filter eliminates undesired modulation of the variable frequency oscillator by an undesired received signal.
摘要翻译： 描述了具有锁相环解调器的无线电接收机。 锁相环包括相位比较器，可变频率（电压控制）振荡器和低通滤波器。 响应于环路的调谐，控制锁相环的捕获范围和锁定范围。 在具有锁相环的AM接收机中，环路的可变频率振荡器为同步检波器提供参考载波，该同步检波器被锁相到调制载波。 带通滤波器通过不期望的接收信号消除了可变频率振荡器的不期望的调制。
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