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    • 84. 发明授权
    • Demodulation system capable of establishing synchronization in a
transient state
    • 解调系统能够在瞬态状态下建立同步
    • US4757266A
    • 1988-07-12
    • US896985
    • 1986-08-15
    • Yasuharu YoshidaMasato TaharaManabu YagiToru Matsuura
    • Yasuharu YoshidaMasato TaharaManabu YagiToru Matsuura
    • H04L27/38H03D3/18H03K9/10
    • H04L27/38
    • In a demodulation system comprising a demodulator (22) which demodulates a quadrature amplitude modulated signal into first and second sets of output digital signals by the use of a reference carrier signal (CA), a specific phase control signal is produced in a transient state by discriminating a plurality of areas and a plurality of zones defined on a phase plane of the modulated signal. The areas are defined by dividing the phase plane by both a pair of quadrant reference axes and a pair of auxiliary reference axes phase shifted by .pi./4 (radians) relative to the quadrant decision axes. The zones are defined along and adjacent to the auxiliary reference axes. First and second detection signals (S.sub.1 and S.sub.2) are produced by a read-only memory (35) as results of discrimination of the areas and the zones, respectively. The specific phase control signal is switched to a normal phase control signal produced in a normal state in the known manner. Alternatively, the first and the second detection signals may be supplied to a transversal equalizer (21) for controlling imaginary part weighting control signals.
    • 在包括通过使用参考载波信号(CA)将正交幅度调制信号解调为第一和第二组输出数字信号的解调器(22)的解调系统中,特定相位控制信号在过渡状态下由 鉴别在调制信号的相位平面上限定的多个区域和多个区域。 这些区域通过将相位平面除以一对象限参考轴和相对于象限决定轴相移相移π/ 4(弧度)的一对辅助参考轴来定义。 这些区域沿着辅助参考轴线并与其相邻。 第一和第二检测信号(S1和S2)分别由区域和区域的区分结果由只读存储器(35)产生。 特定相位控制信号以已知的方式切换到以正常状态产生的正常相位控制信号。 或者,第一和第二检测信号可以被提供给用于控制虚部加权控制信号的横向均衡器(21)。
    • 85. 发明授权
    • Transmission apparatus, radio communication apparatus, and transmission method
    • 发送装置,无线通信装置以及发送方法
    • US08798191B2
    • 2014-08-05
    • US13256186
    • 2010-12-17
    • Toru Matsuura
    • Toru Matsuura
    • H04L27/04H03F3/24H03F3/195H03F3/189H03F1/02H03F1/32H04B1/04
    • H03F1/3247H03F1/0222H03F1/3294H03F3/189H03F3/195H03F3/24H03F2200/336H03F2200/451H04B1/0475
    • Disclosed is a transmission apparatus, a radio communication apparatus, and a transmission method for making it possible to obtain stable characteristics by controlling the difference of time between an amplitude signal and a phase signal to an optimal point, without depending on a modulated signal nor making the circuit size larger. A multiplier (170) generates, in a pseudo manner, a digital modulated signal corresponding to a signal that is obtained by performing analog to digital conversion on a modulated signal that is generated by an amplitude modulator (140), by multiplying a digital amplitude signal that is obtained by performing analog to digital conversion on an amplitude signal by a digital angle modulated signal corresponding to a signal that is obtained by performing analog to digital conversion on an angle modulated signal. Distortion calculation section (180) calculates distortion of the digital modulated signal, control section (190) controls delay time based on the distortion of the digital modulated signal, and delay adjustment section (130) adjusts delay time until the amplitude signal is input to amplitude modulator (140), or delay time until the angle modulated signal is input to amplitude modulator (140).
    • 公开了一种发送装置,无线电通信装置和发送方法,用于通过将幅度信号和相位信号之间的时间差控制到最佳点来获得稳定的特性,而不依赖于调制信号,也不会使 电路尺寸较大。 乘法器(170)以伪方式产生与通过对由振幅调制器(140)产生的调制信号进行模数转换而获得的信号相对应的数字调制信号,通过将数字幅度信号 通过对与通过对角度调制信号进行模数转换获得的信号相对应的数字角度调制信号对振幅信号进行模数转换而获得。 失真计算部(180)计算数字调制信号的失真,控制部(190)基于数字调制信号的失真来控制延迟时间,延迟调整部(130)调整延迟时间,直到振幅信号输入到振幅 调制器(140)或直到角度调制信号被输入到幅度调制器(140)的延迟时间。
    • 86. 发明授权
    • Mismatch shaping for DAC
    • DAC的不匹配整形
    • US08378870B1
    • 2013-02-19
    • US13227268
    • 2011-09-07
    • Toru Matsuura
    • Toru Matsuura
    • H03M1/66
    • H03M1/0665H03M1/74H03M3/40H03M3/41H03M3/502
    • The present invention provides a DAC (Digital to Analog Converter) capable of generating a transfer function having a notch for reducing an error signal level in a desired frequency band.The DAC of the present invention includes a switch bank to which at least two reference signals are inputted and which selects any of these signals and outputs the selected signal through a plurality of paths, and an amplitude-phase control section which controls a reference signal selection operation of the switch bank on the basis of an input signal.
    • 本发明提供一种DAC(数模转换器),能够产生具有用于降低期望频带中的误差信号电平的陷波的传递函数。 本发明的DAC包括一个开关组,输入至少两个参考信号并选择这些信号中的任一个并通过多条路径输出所选择的信号;以及幅度相位控制部分,其控制参考信号选择 根据输入信号对开关组进行操作。
    • 87. 发明申请
    • ANGLE MODULATOR, TRANSMISSION DEVICE, AND WIRELESS COMMUNICATION DEVICE
    • 角度调制器,传输设备和无线通信设备
    • US20120020390A1
    • 2012-01-26
    • US13256894
    • 2010-12-17
    • Toru MatsuuraKenji Miyanaga
    • Toru MatsuuraKenji Miyanaga
    • H04B1/38H03C1/50H04B7/00H03C3/02
    • H04L27/20H03C3/095
    • Disclosed are an angle modulator, a transmission apparatus, and a radio communication apparatus that can compensate phase discontinuity when an operational mode of a voltage controlled oscillator is switched. Angle modulator (100) includes phase difference detection section (150) that detects a difference of phases between an input signal of subtractor (141) and an angle modulated signal, using the result of subtraction by subtractor (141) of frequency locked loop circuit (140); correction control section (160) that generates a control signal for compensating that difference of phases based on that difference of phases; correction section (120) that corrects the phase of the angle modulated signal by adding the control signal to an input signal of angle modulator (100), an input signal of loop filter (142), or an input signal of VCO (143) during a predetermined period after VCO (143) switches the operational mode (from time t3 to time t4).
    • 公开了一种角度调制器,发送装置和无线电通信装置,其可以在切换压控振荡器的操作模式时补偿相位不连续性。 角度调制器(100)包括相位差检测部分(150),其使用锁相环电路的减法器(141)减法的结果来检测减法器(141)的输入信号与角度调制信号之间的相位差 140); 校正控制部分(160),其基于所述相位差产生用于补偿所述相位差的控制信号; 校正部分(120),其通过将控制信号与角度调制器(100)的输入信号,环路滤波器(142)的输入信号或VCO(143)的输入信号相加来校正角度调制信号的相位, 在VCO(143)切换操作模式(从时间t3到时间t4)之后的预定时间段。
    • 89. 发明授权
    • Frequency modulation circuit, transmission circuit and communication device
    • 调频电路,传输电路及通讯装置
    • US07822392B2
    • 2010-10-26
    • US11936433
    • 2007-11-07
    • Toru Matsuura
    • Toru Matsuura
    • H04B1/66H04B1/04
    • H03C3/0925H03C3/0941H03C3/095H03C3/0958
    • Provided is a frequency modulation circuit for outputting a frequency-modulated signal with a high precision. A VCO 13 includes a first variable capacitor 132 having a predetermined capacitance change rate, and a second variable capacitor 133 having a greater capacitance change rate than that of the first variable capacitor 132. When the frequency modulation circuit is applied in a narrowband modulation method, a switch 15 switches a connection path of an open loop such that an input terminal and the first variable capacitor 132 are connected. On the other hand, when the frequency modulation circuit is applied in a wideband modulation method, the switch 15 switches the connection path of the open loop such that the input terminal and the second variable capacitor 133 are connected.
    • 提供了一种用于以高精度输出调频信号的频率调制电路。 VCO13包括具有预定电容变化率的第一可变电容器132和具有比第一可变电容器132的电容变化率更大的电容变化率的第二可变电容器133.当以窄带调制方式应用频率调制电路时, 开关15切换开环的连接路径,使得输入端子和第一可变电容器132连接。 另一方面,当以宽带调制方式应用频率调制电路时,开关15切换开环的连接路径,使得输入端子和第二可变电容器133连接。
    • 90. 发明授权
    • Dual-polarization receiver
    • 双极化接收机
    • US07742549B2
    • 2010-06-22
    • US11324332
    • 2006-01-04
    • Toru Matsuura
    • Toru Matsuura
    • H04B7/10H04L1/02
    • H04B1/126
    • A dual-polarization receiver for receiving polarized wave signals whose directions are different from each other has receiving demodulation units of a working system and a backup system for one of the polarized wave signals, and receiving demodulation units of a working system and a backup system for the other of the polarized wave signals. RF local oscillation circuits of frequency converting circuits of the working system are connected with a common REF oscillation circuit and RF local oscillation circuits of frequency converting circuits of the backup system are connected with a common REF oscillation circuit.
    • 用于接收方向不同的偏振波信号的双极化接收机已经接收了用于偏振波信号中的一个的工作系统和备用系统的解调单元,并且接收工作系统的解调单元和用于 另一个是偏振波信号。 工作系统的变频电路的RF本地振荡电路与公共REF振荡电路连接,备用系统的变频电路的RF本地振荡电路与公共REF振荡电路连接。