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    • 4. 发明授权
    • Radio receiver and diversity receiver
    • 无线电接收机和分集接收机
    • US06571090B1
    • 2003-05-27
    • US09613613
    • 2000-07-11
    • Yukihiro MoriyamaSaburo KameiHaruhiro NomaKouzou TokuyamaKazuhiko Nobunaga
    • Yukihiro MoriyamaSaburo KameiHaruhiro NomaKouzou TokuyamaKazuhiko Nobunaga
    • H04B702
    • H04B7/0822H04B7/0808H04B7/0888
    • The present invention relates to a radio receiver or a diversity receiver where reception waves respectively reaching a plurality N of branches in parallel are cyclically selected at a first frequency equal to a value of the product of a symbol frequency, the plurality N being a total number of branches, and a prescribed number E equal to or greater than “2”, the instantaneous values of selected reception waves are sequentially sampled at a second frequency equal to or higher than the first frequency, and a resulting sequence of instantaneous values is cyclically split at the first frequency, whereby sequences of instantaneous values individually corresponding to the plurality N of reception waves are output. In a radio transmission system applying the above radio receiver or diversity receiver, reception waves reaching a plurality of branches are received in parallel without largely increasing hardware in scale.
    • 无线电接收机或分集接收机技术领域本发明涉及一种无线电接收机或分集接收机,其中以等于符号频率乘积的值的第一频率循环地选择并行到达多个N个分支的接收波,多个N是总数 的分支和规定数量E等于或大于“2”,所选接收波的瞬时值以等于或高于第一频率的第二频率顺序采样,并且所得到的瞬时值序列被循环地分割 在第一频率处,输出与多个N个接收波分别对应的瞬时值序列。 在应用上述无线电接收机或分集接收机的无线电传输系统中,并行地接收到达多个分支的接收波,而不会大量增加硬件规模。
    • 5. 发明授权
    • Digital radio communication apparatus and method of controlling the same
    • 数字无线通信装置及其控制方法
    • US06307879B1
    • 2001-10-23
    • US09052388
    • 1998-03-31
    • Yukihiro Moriyama
    • Yukihiro Moriyama
    • H04B138
    • H04B1/40
    • A radio communication apparatus includes: a transmission unit for transmitting a radio wave; and a reception unit for receiving a radio wave and demodulating the same, the reception unit including: an analog filter provided in a first stage of the reception unit; a digital filter provided in a second stage of the reception unit so as to compensate a characteristic of the analog filter by having a filter characteristic of the digital filter varied by varying a tap factor; a test signal generation unit for supplying a test signal to the reception unit; an error state detection unit for detecting an error based on a digital demodulated signal derived from the test signal; and a tap factor setting unit for temporarily setting a tap factor of the digital filter that reduces a level of the error. Supplying of the test signal and detecting of the error are repeated until a target tap factor that minimizes the error is determined, whereupon the target tap factor is set in the digital filter.
    • 无线通信装置包括:发送无线电波的发送单元; 以及接收单元,用于接收无线电波并进行解调,所述接收单元包括:设置在所述接收单元的第一级中的模拟滤波器; 提供在所述接收单元的第二级中的数字滤波器,以便通过改变所述数字滤波器的滤波器特性来改变所述模拟滤波器的特性; 测试信号生成单元,用于向接收单元提供测试信号; 误差状态检测单元,用于基于从测试信号导出的数字解调信号来检测误差; 以及用于临时设置降低误差水平的数字滤波器的抽头因子的抽头因子设置单元。 重复提供测试信号和检测误差,直到确定最小化误差的目标抽头因子,从而在数字滤波器中设置目标抽头因子。
    • 8. 发明授权
    • Radio apparatus
    • 无线电设备
    • US6091941A
    • 2000-07-18
    • US192240
    • 1998-11-16
    • Yukihiro MoriyamaYuji KanekoKoji TakataMasaru Kabashima
    • Yukihiro MoriyamaYuji KanekoKoji TakataMasaru Kabashima
    • H01Q3/26H01Q11/12H03C3/40H04B1/04H04L27/36
    • H04L27/368H01Q11/12H01Q3/267H03C3/406H04B2001/0425
    • Disclosed is a radio apparatus in which modulating signals (I, Q signals) from an arithmetic/control unit are converted to analog signals, which are then applied to an orthogonal modulator. A modulated wave for transmission, which has been produced by orthogonally modulating a reference carrier wave by the modulating signals, is demodulated by the orthogonal detector. The arithmetic/control unit compares the modulating signals and the demodulated signals and, based upon the comparison, updates distortion compensation coefficients and applies pre-distortion processing to the modulating signal using the distortion compensation coefficients. Leakage carrier produced due to offset of the orthogonal modulator is detected and the arithmetic/control unit adjusts the level of the modulating signals or shifts the phase of the reference carrier wave in such a manner that the leakage carrier (offset) becomes zero.
    • 公开了一种无线电设备,其中将来自算术/控制单元的调制信号(I,Q信号)转换为模拟信号,然后将其应用于正交调制器。 通过正交检波器解调通过调制信号正交调制参考载波产生的用于传输的调制波。 算术/控制单元比较调制信号和解调信号,并且基于比较,更新失真补偿系数,并使用失真补偿系数对调制信号应用预失真处理。 检测由于正交调制器的偏移而产生的泄漏载波,并且算术/控制单元调节调制信号的电平或以使得泄漏载波(偏移)变为零的方式偏移参考载波的相位。