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1.发明授权
公开(公告)号：US4355401A
公开(公告)日：1982-10-19
申请号：US191154
申请日：1980-09-26
申请人： Masao Ikoma , Noboru Saegusa , Yoshihiko Akaiwa , Ichirou Takase
发明人： Masao Ikoma , Noboru Saegusa , Yoshihiko Akaiwa , Ichirou Takase
CPC分类号： H04L27/2275 , H04L27/0008 , H04L27/14 , H04L27/2035
摘要： According to the present invention, a radio apparatus has a section for receiving an analog signal and a digital angle-modulated carrier wave signal. The analog signal and digital angle-modulated carrier wave output of the receiver section are demodulated to provide first and second demodulated signals. A clock signal is regenerated from the output of either the demodulating means or receiver section. A control signal selectively operates a switch for passing either the first or the second demodulated signals. The regenerated clock signal controls the switch.
摘要翻译： 根据本发明，无线电设备具有用于接收模拟信号和数字角度调制载波信号的部分。 对接收机部分的模拟信号和数字角度调制载波输出进行解调，以提供第一和第二解调信号。 时钟信号从解调装置或接收机部分的输出再生。 控制信号选择性地操作用于通过第一或第二解调信号的开关。 再生的时钟信号控制开关。
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公开(公告)号：US07098734B2
公开(公告)日：2006-08-29
申请号：US10947271
申请日：2004-09-23
IPC分类号： H03F1/26
CPC分类号： H03F1/3258 , H03F2201/3224
摘要： A memory effect distortion component compensating unit compensates for a distortion component caused by a memory effect of an amplifier by using a time difference of results from raising an input signal to even power. For example, the amplifier may include a memory effect distortion component compensating unit having an even power raising unit for raising an input signal to even power, an even power raising result delaying unit for delaying a signal of a result of even power raising, an even power raising result time difference detecting unit for detecting a difference between a signal of an even power raising result and a delayed signal, an input signal multiplying unit for multiplying a signal of a detection result by an input signal, a distortion compensation coefficient multiplying unit for multiplying a signal of a multiplication result by a distortion compensation coefficient, and a distortion compensation coefficient multiplication result adding unit for adding an input signal and a signal of a multiplication result.
摘要翻译： 存储器效应失真分量补偿单元通过使用将输入信号提升为均匀功率的结果的时间差来补偿由放大器的存储器效应引起的失真分量。 例如，放大器可以包括具有用于将输入信号提升为均匀功率的均匀上电单元的存储器效应失真分量补偿单元，用于延迟均匀功率提升的结果的信号的均匀上电结果延迟单元， 功率提升结果时间差检测单元，用于检测均匀功率提升结果的信号与延迟信号之间的差;输入信号乘法单元，用于将检测结果的信号乘以输入信号;失真补偿系数乘法单元，用于 将相乘结果的信号乘以失真补偿系数，以及用于将输入信号和乘法结果的信号相加的失真补偿系数乘法结果相加结果单元。
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公开(公告)号：US5181182A
公开(公告)日：1993-01-19
申请号：US813806
申请日：1991-12-26
申请人： Kenzo Urabe , Yoshihiko Akaiwa
发明人： Kenzo Urabe , Yoshihiko Akaiwa
IPC分类号： G06F1/035
CPC分类号： G06F1/0356 , G06F2101/04
摘要： A multi-level band-restricted waveform generator in which a modulation wave prior to band restriction (M-level signal sequence) is broken into elementary waveforms and a plurality (N-nary) of prestored waveform components corresponding to the elementary waveforms after predetermined band restrictions are read out of a read-only memory for generating waveform components and added to generate a desired multi-level band-restricted waveform.
摘要翻译： 一种多级带限制波形发生器，其中频带限制之前的调制波（M级信号序列）被分解为基本波形和与预定频带之后的基本波形相对应的多个（N个）预先存储的波形分量 读出用于产生波形分量的只读存储器的限制，并且被添加以产生期望的多电平频带限制波形。
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公开(公告)号：US5097484A
公开(公告)日：1992-03-17
申请号：US417559
申请日：1989-10-05
申请人： Yoshihiko Akaiwa
发明人： Yoshihiko Akaiwa
CPC分类号： H04B7/082 , H04B7/0608 , H04B7/0811
摘要： In an antenna-selection diversity transmission and reception equipment which is in digital communication with a transmission and reception equipment having a single antenna, and performs transmission and reception with time division by using the same radio frequencies, the antenna-selection diversity transmission and reception equipment comprises a plurality of antennae, a receiving part having a receiving unit, comparing unit and selecting unit which are adapted for a receiving-antenna selection diversity, and a transmitting part having a memory unit for storing antenna information that was selected by the receiving part. An antenna for transmission is selected from the plurality of antennae at the time of transmission in accordance with the information of the memory unit.
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5.发明授权
公开(公告)号：US4652699A
公开(公告)日：1987-03-24
申请号：US746425
申请日：1985-06-19
申请人： Yoshihiko Akaiwa
发明人： Yoshihiko Akaiwa
摘要： A spectrum inversion type voice scrambler for secret speech communication comprises a first spectrum inversion section, a second inversion section and an adder for summing the outputs of the first and second inversion sections. A random signal generator produces two random signals for controlling, respectively, the spectrum inversion in the two inversion sections. The first inversion section is comprised of a modulator section composed of a variable frequency signal generator response to a random signal, a mixer receiving an input signal and the output of the variable frequency generator. The second inversion section includes three modulator sections the first and third of which are composed of a fixed frequency generator, a mixer and a low pass filter. The second modulator section is composed of a variable frequency generator responsive to the second random signal, a mixer and a low pass filter. The first modulator receives the input signal, while the third modulator has its output connected to the adder which also receives the output of the first spectrum inversion section. By the above arrangement only one type of filter, a low pass filter, is needed.
摘要翻译： 用于秘密语音通信的频谱反转型语音加扰器包括第一频谱反转部分，第二反演部分和用于对第一和第二反转部分的输出求和的加法器。 随机信号发生器产生两个随机信号，分别用于控制两个反演部分中的频谱反演。 第一反转部分包括由可变频率信号发生器响应随机信号组成的调制器部分，接收输入信号的混合器和可变频率发生器的输出。 第二反转部分包括三个调制器部分，第一和第三部分由固定频率发生器，混频器和低通滤波器组成。 第二调制器部分由响应于第二随机信号的可变频率发生器，混频器和低通滤波器组成。 第一调制器接收输入信号，而第三调制器的输出连接到加法器，该加法器也接收第一频谱反转部分的输出。 通过上述布置，仅需要一种类型的滤波器，即低通滤波器。
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公开(公告)号：US5710995A
公开(公告)日：1998-01-20
申请号：US782187
申请日：1997-01-16
CPC分类号： H04B7/0874 , H04B1/1081 , H04B7/0848
摘要： An FM radio receiver, particularly for mobile receivers, reduces the effects of multipath distortion. It selects either an adaptive process (constant modulus algorithm or CMA) or a antenna diversity process depending on the circumstances of the instantaneous reception. The receiver reduces both the decline of the level of received signals with the diversity process and waveform distortion with the CMA process.
摘要翻译： 特别是用于移动接收机的FM无线电接收机减少了多径失真的影响。 它根据瞬时接收的情况选择自适应过程（恒模算法或CMA）或天线分集过程。 接收机通过CMA过程减少了分集过程和波形失真的接收信号电平的下降。
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7.发明授权Digital radio communication system utilizing quadrature modulated carrier waves 失效利用正交调制载波的数字无线电通信系统
公开(公告)号：US4817116A
公开(公告)日：1989-03-28
申请号：US722256
申请日：1985-04-12
IPC分类号： H04L27/20 , H04L27/233 , H04L27/10
CPC分类号： H04L27/2071 , H04L27/2334 , Y02B60/50
摘要： In order to achieve the spectrum economy and reduce the power consumption of a transmitter and reduce the error rate at a receiver and simplify receiver circuitry, at least one bit stream to be transmitted is quadrature modulated in a manner that the signal points do not define a trace on a complex amplitude plane which passes through the origin of the plane coordinates or in the vicinity thereof. The received signal is hard limited and frequency-discriminated to determine the instantaneous angular velocity of the received signal and is integrated to detect the phase variation between two consecutive received signals, and thereafter is decided with respect to the phase variation according to the decision threshold levels 0 and .+-..pi. radians.
摘要翻译： 为了实现频谱经济性并降低发射机的功耗并降低接收机的误码率并简化接收机电路，要传输的至少一个比特流以正交调制方式使得信号点不定义 在穿过平面坐标的原点或其附近的复振幅平面上的轨迹。 接收到的信号被硬限制并进行频率鉴别，以确定接收信号的瞬时角速度，并被积分以检测两个连续接收信号之间的相位变化，然后根据判定阈值水平相对于相位变化来确定 0和+/- pi弧度。
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8.发明授权
公开(公告)号：US4747101A
公开(公告)日：1988-05-24
申请号：US854961
申请日：1986-04-22
摘要： In order to effectively avoid cochannel interferences in a multi-station communications system utilizing a plurality of channels in common, the order of transmission channels to be used is determined utilizing a transmission priority assigned to each channel. The subject matter is characterized in that (a) the transmission priority of a selected channel is raised if the selected channel is not used at another station, and (b) is lowered if the selected channel is used at another station. This means that the past use records of the transmission channels are accumulated so that a good channel can be selected with high probability. In other words, a transmission channel with high priority is still ready to be used even if it was not selected in the preceding selection.
摘要翻译： 为了有效地避免利用多个信道共同的多站通信系统中的同信道干扰，使用分配给每个信道的传输优先级来确定要使用的传输信道的顺序。 主题的特征在于：（a）如果所选择的信道在另一个站不被使用，则提高所选信道的传输优先级，并且（b）如果所选信道在另一站使用则降低。 这意味着过去使用的传输信道的记录被累积，从而可以高概率地选择好的信道。 换句话说，高优先级的传输信道仍然可以被使用，即使在前面的选择中没有被选择。
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公开(公告)号：US4661970A
公开(公告)日：1987-04-28
申请号：US868140
申请日：1986-05-28
申请人： Yoshihiko Akaiwa
发明人： Yoshihiko Akaiwa
CPC分类号： H04M1/72505
摘要： A cordless telephone system includes a plurality of radiophones, each having a first transmitter and a first receiver of different transmission and reception frequencies; and a radio station, wired to a telephone line. The radio station comprises a second receiver and a second transmitter, each having the same reception and transmission frequencies as those of the radiophones; switching means for connecting an input terminal of the second transmitter and an output terminal of the second receiver to the telephone line, or for connecting the input terminal of the second transmitter and the output terminal of the second receiver; and control means for receiving a control signal from the second receiver and supplying a control signal to the switching means. Half duplex communication can be performed between the radiophones.
摘要翻译： 无线电话系统包括多个无线电话，每个无线电话具有不同发送和接收频率的第一发射机和第一接收机; 和一个连接到电话线的广播电台。 无线电台包括第二接收机和第二发射机，每个具有与无线电话相同的接收和发送频率; 切换装置，用于将第二发射机的输入端和第二接收机的输出端连接到电话线，或用于连接第二发射机的输入端和第二接收机的输出端; 以及控制装置，用于从第二接收器接收控制信号并向切换装置提供控制信号。 可以在无线电话之间执行半双工通信。
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10.发明授权
公开(公告)号：US4050038A
公开(公告)日：1977-09-20
申请号：US609489
申请日：1975-09-02
摘要： Isolators and asymmetrical circulators of the non-reciprocal type employing tapered conductors positioned upon a ferrimagnetic member wherein means are provided for creating a localized non-uniform D.C. magnetic field in the region of one edge of the tapered conductor and of a field strength sufficient to cause the ferrimagnetic slab to create a magnetic resonance condition within a predetermined frequency range.In one embodiment the non-uniform localized magnetic field is produced by a magnetic member positioned along said one edge.In another embodiment the magnetic member may be eliminated and the said one edge may be aligned with or extended beyond one edge of the ferrimagnetic slab to obtain the non-uniform magnetic field.
摘要翻译： 隔离器和不对称型的非对称型循环器采用位于铁氧体构件上的锥形导体，其中提供了用于在锥形导体的一个边缘的区域中产生局部非均匀DC磁场的装置和足以引起 铁磁板，以在预定频率范围内产生磁共振条件。
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