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公开(公告)号：US11258650B2
公开(公告)日：2022-02-22
申请号：US16726604
申请日：2019-12-24
发明人： Tianjian Zuo , Sen Zhang
摘要： A communication method, a communications apparatus, and a storage medium are disclosed, to reduce a probability that consecutive bit errors occur in a communications system. A received to-be-sent signal is modulated to obtain a modulated signal, and N rounds of operations are further performed on the modulated signal to obtain an encoded signal. An output of the 1st-round operation in the N rounds of operations is determined based on the modulated signal and an output that is of the Nth-round operation and that is processed by a first delay circuit, and an output of the ith-round operation in the N rounds of operations is determined based on an output of the (i−1)th-round operation and an output that is of the Nth-round operation and that is processed by a second delay circuit, where i is an integer greater than 1 and less than or equal to N.
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公开(公告)号：US20190199439A1
公开(公告)日：2019-06-27
申请号：US16287920
申请日：2019-02-27
发明人： Tianjian Zuo , Liang Zhang , Enbo Zhou
IPC分类号： H04B10/25 , H04B10/524
CPC分类号： H04B10/2503 , H04B10/524 , H04L27/26
摘要： Embodiments of the present disclosure disclose a signal modulation and demodulation method and system, and an apparatus, to eliminate SSBI generated in a modulation and demodulation method. The method includes: performing, by a transmit end, PAM encoding on an input signal to obtain a PAM signal; electrically modulating, by the transmit end, the PAM signal by using a first filter; converting, by the transmit end, the electrically modulated PAM signal into an analog signal; optically modulating, by the transmit end, the analog signal by using an electro-optic modulator to obtain an optical signal, and sending the optical signal. Another method includes receiving, by a receive end, the optical signal, and converting the optical signal into an electrical signal; electrically demodulating, by the receive end, the electrical signal by using a second filter; and performing PAM decoding, by the receive end, the electrically demodulated electrical signal to obtain a restored input signal.
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3.发明申请SIGNAL MODULATION METHOD, SIGNAL DEMODULATION METHOD, SIGNAL MODULATION APPARATUS, SIGNAL DEMODULATION APPARATUS AND SIGNAL TRANSMISSION SYSTEM 有权信号调制方法，信号解调方法，信号调制装置，信号解调装置和信号传输系统公开(公告)号：US20160112235A1
公开(公告)日：2016-04-21
申请号：US14983869
申请日：2015-12-30
发明人： Tianjian Zuo
CPC分类号： H04B10/548 , H04B10/541 , H04B10/556 , H04B10/616 , H04L25/14 , H04L25/4921 , H04L27/2637 , H04L27/2653
摘要： The present invention discloses a signal modulation method, including: demultiplexing an input signal into 2N sub-signals; grouping every two of the 2N sub-signals into a pair; performing filtering on two sub-signals in each pair; performing carrierless amplitude phase (CAP) modulation on the two sub-signals in each pair; modulating the two sub-signals in each pair to a same frequency band, to generate N pairs of CAP signals, where frequency bands of different pairs of sub-signals are different, and a spacing between center frequencies of two neighboring frequency bands is greater than or equal to an average value of baud rates of sub-signals corresponding to the two neighboring frequency bands; and combining the N pairs of CAP signals, and performing electro-optic modulation on a signal obtained after the combining. A signal demodulation method corresponding to the signal modulation method is further disclosed.
摘要翻译： 本发明公开了一种信号调制方法，包括：将输入信号解复用为2N个子信号; 将2N个子信号中的每两个分组成一对; 对每对中的两个子信号执行滤波; 对每对中的两个子信号执行无载波幅度相位（CAP）调制; 将每对中的两个子信号调制到相同的频带，以产生N对CAP信号，其中不同的子信号对的频带不同，并且两个相邻频带的中心频率之间的间隔大于 或等于对应于两个相邻频带的子信号的波特率的平均值; 并组合N对CAP信号，并对组合后获得的信号进行电光调制。 进一步公开了对应于信号调制方法的信号解调方法。
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公开(公告)号：US10911149B2
公开(公告)日：2021-02-02
申请号：US16857774
申请日：2020-04-24
发明人： Tianjian Zuo , Sen Zhang
IPC分类号： H04B10/54 , H04B10/556 , H04L27/34
摘要： A signal generation method and an electronic device pertain to the field of communications technologies, and include normalizing an I path of four-level signals and a Q path of four-level signals to obtain a normalized I path of four-level signals and a normalized Q path of four-level signals, mapping the normalized I path of four-level signals and the normalized Q path of four-level signals based on a normalization coefficient to obtain two paths of six-level signals, and driving a dual-drive Mach-Zehnder modulator (DDMZM) based on the six-level signals.
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公开(公告)号：US20200252132A1
公开(公告)日：2020-08-06
申请号：US16857774
申请日：2020-04-24
发明人： Tianjian Zuo , Sen Zhang
IPC分类号： H04B10/54 , H04B10/556
摘要： This disclosure provides a signal generation method and an electronic device, and pertains to the field of communications technologies. A mapping process is increased in this disclosure, to convert a four-level signal into a six-level signal, so that a dual-drive Mach-Zehnder modulator DDMZM is driven based on the six-level signal, thereby reducing a signal-to-noise ratio requirement of an input signal, improving a noise resistance capability of a transmit end, reducing impact from crosstalk between signals, and reducing a requirement standard on components such as a DAC and a driver. In addition, in embodiments of this disclosure, an amplitude requirement of a drive signal is greatly reduced, so that the amplitude requirement of the drive signal is reduced, and a power consumption requirement is further reduced, thereby reducing working pressure of the DDMZM, and improving overall system performance.
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公开(公告)号：US20180026734A1
公开(公告)日：2018-01-25
申请号：US15722369
申请日：2017-10-02
发明人： Liang ZHANG , Tianjian Zuo , Enbo Zhou
IPC分类号： H04J1/02 , H04B10/556
CPC分类号： H04J1/02 , H04B10/5561 , H04L27/04 , H04L27/2096
摘要： The present invention discloses a digital signal processor, including: a signal generation unit, configured to generate a first digital signal and a second digital signal; a first modulation unit, configured to modulate the first digital signal to obtain a third digital signal; a second modulation unit, configured to modulate the second digital signal to obtain a fourth digital signal; a first phase shifting unit, configured to perform phase shifting on the third digital signal, to output the third digital signal and a fifth digital signal; a second phase shifting unit, configured to perform phase shifting on the fourth digital signal, to output the fourth digital signal and a sixth digital signal; an adder, configured to calculate a sum of the third digital signal and the fourth digital signal, to obtain a seventh digital signal; and a subtractor, configured to subtract the sixth digital signal from the fifth digital signal.
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公开(公告)号：US10608742B2
公开(公告)日：2020-03-31
申请号：US16287920
申请日：2019-02-27
发明人： Tianjian Zuo , Liang Zhang , Enbo Zhou
IPC分类号： H04B10/04 , H04B10/25 , H04L27/26 , H04B10/54 , H04B10/524
摘要： Embodiments of the present disclosure disclose a signal modulation and demodulation method and system, and an apparatus, to eliminate SSBI generated in a modulation and demodulation method. The method includes: performing, by a transmit end, PAM encoding on an input signal to obtain a PAM signal; electrically modulating, by the transmit end, the PAM signal by using a first filter; converting, by the transmit end, the electrically modulated PAM signal into an analog signal; optically modulating, by the transmit end, the analog signal by using an electro-optic modulator to obtain an optical signal, and sending the optical signal. Another method includes receiving, by a receive end, the optical signal, and converting the optical signal into an electrical signal; electrically demodulating, by the receive end, the electrical signal by using a second filter; and performing PAM decoding, by the receive end, the electrically demodulated electrical signal to obtain a restored input signal.
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公开(公告)号：US10389462B2
公开(公告)日：2019-08-20
申请号：US15722369
申请日：2017-10-02
发明人： Liang Zhang , Tianjian Zuo , Enbo Zhou
IPC分类号： H04J1/02 , H04B10/556 , H04L27/04 , H04L27/20
摘要： The present invention discloses a digital signal processor, including: a signal generation unit, configured to generate a first digital signal and a second digital signal; a first modulation unit, configured to modulate the first digital signal to obtain a third digital signal; a second modulation unit, configured to modulate the second digital signal to obtain a fourth digital signal; a first phase shifting unit, configured to perform phase shifting on the third digital signal, to output the third digital signal and a fifth digital signal; a second phase shifting unit, configured to perform phase shifting on the fourth digital signal, to output the fourth digital signal and a sixth digital signal; an adder, configured to calculate a sum of the third digital signal and the fourth digital signal, to obtain a seventh digital signal; and a subtractor, configured to subtract the sixth digital signal from the fifth digital signal.
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公开(公告)号：US09900106B2
公开(公告)日：2018-02-20
申请号：US14983869
申请日：2015-12-30
发明人： Tianjian Zuo
IPC分类号： H04B10/548 , H04L25/14 , H04L27/26 , H04L25/49
CPC分类号： H04B10/548 , H04B10/541 , H04B10/556 , H04B10/616 , H04L25/14 , H04L25/4921 , H04L27/2637 , H04L27/2653
摘要： The present invention discloses a signal modulation method, including: demultiplexing an input signal into 2N sub-signals; grouping every two of the 2N sub-signals into a pair; performing filtering on two sub-signals in each pair; performing carrierless amplitude phase (CAP) modulation on the two sub-signals in each pair; modulating the two sub-signals in each pair to a same frequency band, to generate N pairs of CAP signals, where frequency bands of different pairs of sub-signals are different, and a spacing between center frequencies of two neighboring frequency bands is greater than or equal to an average value of baud rates of sub-signals corresponding to the two neighboring frequency bands; and combining the N pairs of CAP signals, and performing electro-optic modulation on a signal obtained after the combining. A signal demodulation method corresponding to the signal modulation method is further disclosed.
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