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1. 发明授权

US09178599B2 Diversity receiving device and diversity receiving method 有权
标题翻译：分集接收装置和分集接收方法
公开(公告)号：US09178599B2
公开(公告)日：2015-11-03
申请号：US14430314
申请日：2013-07-17
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Masataka Imao
IPC分类号： H04B7/10 , H04L1/02 , H04B7/08 , H04B7/12 , H04B15/00
CPC分类号： H04B7/08 , H04B7/12 , H04B15/00
摘要： A diversity receiving device includes receiving circuits, a diversity combining unit, and an oscillation controller. The receiving circuit performs frequency conversion of an analog received signal obtained at a first receiving system, by using a plurality of lower-side oscillation-frequency signals supplied from a first local oscillator, to generate a plurality of lower-side low-frequency signals, adds up the plurality of lower-side low-frequency signals to generate a first addition signal. The receiving circuit performs frequency conversion of an analog received signal obtained at a second receiving system, by using a plurality of higher-side oscillation-frequency signals supplied from a second local oscillator, to generate a plurality of higher-side low-frequency signals, and adds up the plurality of higher-side low-frequency signals to generate a second addition signal. The oscillation controller controls lower-side oscillation-frequencies so that frequency bands of the plurality of lower-side low-frequency signals become adjacent to one another and controls higher-side oscillation-frequencies so that frequency bands of the plurality of higher-side low-frequency signals become adjacent to one another.
摘要翻译：分集接收装置包括接收电路，分集组合单元和振荡控制器。接收电路通过使用从第一本机振荡器提供的多个下侧振荡频率信号来执行在第一接收系统获得的模拟接收信号的频率转换，以产生多个下侧低频信号，将多个下侧低频信号相加以产生第一相加信号。接收电路通过使用从第二本地振荡器提供的多个较高侧的振荡频率信号来执行在第二接收系统获得的模拟接收信号的频率转换，以产生多个较高侧的低频信号，并且将多个较高侧的低频信号相加以产生第二加法信号。振荡控制器控制下侧振荡频率，使得多个下侧低频信号的频带彼此相邻并且控制较高侧振荡频率，使得多个较低侧低频信号的频带低频率信号彼此相邻。

2. 发明授权

US10181942B2 Optical communication system, optical signal generation device, and optical signal reception device 有权
公开(公告)号：US10181942B2
公开(公告)日：2019-01-15
申请号：US15544792
申请日：2015-11-12
申请人： Mitsubishi Electric Corporation
发明人： Masataka Imao
IPC分类号： H04L7/00 , H04B10/516 , H04J14/08 , H04B10/114 , H04L7/04 , H04B10/50
摘要： An optical signal generation device in an optical communication system includes a control signal manager that outputs the number of information sequences and control signals, a timing manager that outputs a timing signal, signal multiplexers that generate multiplexed signal sequences by multiplexing in a time-division manner transmission information sequences and the control signals, pulse converters that convert the multiplexed signal sequences to pulse signal sequences, and transmission processing units that send transmission signal sequences whose intensities correspond to values of the pulse signal sequences. Each control signal includes an identification signal allowing each transmission information sequence to be identified, the timing signals change their values on a cycle of the minimum pulse width of the pulse signal sequences, and time positions at which values of the N timing signals vary are different from one another.

3. 发明授权

US10148474B2 Receiving device and receiving method, and transmitting/receiving system 有权
公开(公告)号：US10148474B2
公开(公告)日：2018-12-04
申请号：US15513889
申请日：2015-07-31
申请人： Mitsubishi Electric Corporation
发明人： Aki Kaizu , Masataka Imao , Eiji Matsuo
IPC分类号： H04L27/22 , H04L25/49 , H03L7/08 , H04B1/00 , H04L7/00 , H04L7/04
摘要： A receiving device includes: a receiver that receives a signal including PPM symbols; a clock generator that generates a clock for sampling; an A/D converter that digital-converts the received signal; a reference position detector that detects a leading position of the PPM symbols based on data from the A/D converter; and a clock error detector that detects a clock error. The clock error detector includes: a pulse position detector that detects a pulse position in the PPM symbols based on data from the reference position detector and A/D converter; a position error calculator that calculates a deviation of the pulse position based on data from the reference position detector, A/D converter, and pulse position detector; and a clock error calculator that calculates the clock error based on data from the position error calculator. The receiving device varies a frequency of the clock based on data from the clock error calculator.

4. 发明授权

US10091034B2 Reception device, reception method, and transmission reception system 有权
公开(公告)号：US10091034B2
公开(公告)日：2018-10-02
申请号：US15589547
申请日：2017-05-08
申请人： Mitsubishi Electric Corporation
发明人： Aki Oya , Masataka Imao
IPC分类号： H04L25/08 , H04L1/00 , H04L29/06 , H04L27/22 , H04L27/20
摘要： Provided are a reception device, a reception method and a transmission reception system capable of reducing the influence of distortion in a received signal and achieving high demodulation performance without performing a computation process having a great amount of calculations. The reception device receives a signal containing a known signal part and a data part, and includes a conversion unit that converts the signal received by a reception unit into a digital signal, a region determination unit that determines a nonuse region which is a periodic region containing distortion in the digital signal, on a basis of a first digital signal in the known signal part contained in the digital signal and a known signal held in advance, and a demodulation unit that performs demodulation on the digital signal by using a second digital signal in a region other than the nonuse region in the digital signal.

5. 发明申请

US20150288440A1 DIVERSITY RECEIVING DEVICE AND DIVERSITY RECEIVING METHOD 有权
标题翻译：多样化接收设备和多样性接收方法
公开(公告)号：US20150288440A1
公开(公告)日：2015-10-08
申请号：US14430314
申请日：2013-07-17
申请人： Mitsubishi Electric Corporation
发明人： Masataka Imao
IPC分类号： H04B7/08 , H04B15/00 , H04B7/12
CPC分类号： H04B7/08 , H04B7/12 , H04B15/00
摘要： A diversity receiving device includes receiving circuits, a diversity combining unit, and an oscillation controller. The receiving circuit performs frequency conversion of an analog received signal obtained at a first receiving system, by using a plurality of lower-side oscillation-frequency signals supplied from a first local oscillator, to generate a plurality of lower-side low-frequency signals, adds up the plurality of lower-side low-frequency signals to generate a first addition signal. The receiving circuit performs frequency conversion of an analog received signal obtained at a second receiving system, by using a plurality of higher-side oscillation-frequency signals supplied from a second local oscillator, to generate a plurality of higher-side low-frequency signals, and adds up the plurality of higher-side low-frequency signals to generate a second addition signal. The oscillation controller controls lower-side oscillation-frequencies so that frequency bands of the plurality of lower-side low-frequency signals become adjacent to one another and controls higher-side oscillation-frequencies so that frequency bands of the plurality of higher-side low-frequency signals become adjacent to one another.
摘要翻译：分集接收装置包括接收电路，分集组合单元和振荡控制器。接收电路通过使用从第一本机振荡器提供的多个下侧振荡频率信号来执行在第一接收系统获得的模拟接收信号的频率转换，以产生多个下侧低频信号，将多个下侧低频信号相加以产生第一相加信号。接收电路通过使用从第二本地振荡器提供的多个较高侧的振荡频率信号来执行在第二接收系统获得的模拟接收信号的频率转换，以产生多个较高侧的低频信号，并且将多个较高侧的低频信号相加以产生第二加法信号。振荡控制器控制下侧振荡频率，使得多个下侧低频信号的频带彼此相邻并且控制较高侧振荡频率，使得多个较低侧低频信号的频带低频率信号彼此相邻。

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