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1.发明授权公开(公告)号：US11082153B2
公开(公告)日：2021-08-03
申请号：US16374549
申请日：2019-04-03
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng Liu , Chunlin Ji , Xingan Xu , Shasha Zhang
Abstract: The present application discloses a signal sampling and recovery method and apparatus applicable to an OvXDM system, and the OvXDM system. The method includes: constructing, based on design parameters, an observation matrix Φ that is irrelevant to an original signal y, wherein the observation matrix Φ is a two-dimensional M*S matrix, S is a length of the original signal y, and M is smaller than S; compressing the original signal y based on a formula Ycs=ΦY, to obtain a M*1 compressed signal Ycs, wherein Y is a S*1 column vector that is obtained according to the original signal y; and reconstructing the compressed signal Ycs based on a predetermined algorithm, so as to recover the original signal y. The present application implements accurate recovery of the original signal at a reduced sampling rate, thereby reducing hardware requirements of the system and improving feasibility of the technical solution.
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公开(公告)号：US10833792B2
公开(公告)日：2020-11-10
申请号：US16379744
申请日：2019-04-09
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng Liu , Chunlin Ji , Hao Zheng , Shasha Zhang
Abstract: An overlapped multiplexing-based modulation and demodulation method and device are disclosed. In the modulation method, a precoding structure is used, and a transmit end first performs parity check product code-based coding on an input information sequence, generates a factor graph for a coding result and according to a coding rule, then performs overlapped multiplexing-based modulation and coding, and transmits a coded signal by using an antenna. In the demodulation method, a signal is transmitted by using a channel, and after receiving the signal by using an antenna, a receive end first performs digital signal processing, including processes such as synchronization and equalization, then performs overlapped multiplexing-based demodulation and decoding, and finally performs factor graph-based belief propagation decoding on a decoding result, to finally obtain a decoded sequence. In this application, a product code-based decoding method is used, a parity check code is used as a subcode, and a belief propagation idea of the factor graph is applied to a decoder end. Therefore, a parity check product code in a simple structure is used. In addition, in the method, the factor graph is used in a decoding process, thereby reducing operation complexity.
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公开(公告)号：US10771303B2
公开(公告)日：2020-09-08
申请号：US16377149
申请日：2019-04-05
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng Liu , Chunlin Ji , Xingan Xu , Shasha Zhang
Abstract: In an overlapped multiplexing-based decoding method and device, and modulation and demodulation method and system provided in this application, a convolution operation with a header and without a tail is split into group operations with both a header and a tail by using a slide group decoding scheme and based on association between adjacent symbols in an OvXDM system, and then each group of sequences is decoded by using a corresponding decoding algorithm.
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公开(公告)号：US20190222335A1
公开(公告)日：2019-07-18
申请号：US16362400
申请日：2019-03-22
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng LIU , Chunlin JI , Hao ZHENG , Shasha ZHANG
CPC classification number: H04J3/06 , H04L1/00 , H04L1/0054 , H04L25/49
Abstract: This application discloses a soft value extraction method and device applicable to an OvXDM system, and the OvXDM system. In the method, waveform coding is performed on all symbols in a hard value sequence, to generate a predictive value after overlapped coding; the symbols in the hard value sequence are reversed one by one, and overlapped coding is performed on each reversed symbol and associated symbols before and after the reversed symbol, to generate a predictive value of the reversed symbol; and for each symbol in the hard value sequence, a soft value of the current symbol is calculated based on A×(+1−−1), where A is a coefficient related to a channel type, +1=∥yrx−y+1∥, and −1=∥yrx−y−1∥2; if y+1 is a predictive value of the symbol obtained after overlapped coding and before reversing, y−1 is a predictive value of the symbol obtained after overlapped coding and reversing; and yrx is a received signal sequence.
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公开(公告)号：US20190158323A1
公开(公告)日：2019-05-23
申请号：US16256894
申请日：2019-01-24
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng LIU , Chunlin JI , Changwei LV , Shasha ZHANG
IPC: H04L25/03
Abstract: The present invention provides a signal modulation method. The method includes: generating a transmit signal pulse waveform, where a width of the pulse waveform is τ, each pulse waveform is associated with n symbols (n>1), a width of each symbol is Δτ, and Δτ = τ n ; performing an operation on every n consecutive symbols in a to-be-sent symbol flow and the pulse waveform according to a preset operation manner, to generate an associated signal of the symbols and the pulse waveform; and sending the associated signal by using a transmission channel. The present invention helps improve spectral efficiency of a system. In addition, symbols are mutually constrained based on a correlation between the symbols, and information symbols are scattered to a plurality of symbols, thereby helping improve a capability of resisting noise and attenuation by a signal.
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Patent Agency Ranking
公开(公告)号：US20190081618A1
公开(公告)日：2019-03-14
申请号：US16184036
申请日：2018-11-08
Applicant: SHENZHEN SUPER DATA LINK TECHNOLOGY LTD.
Inventor： Ruopeng LIU , Chunlin JI , Jing NIE , YanQing TAN
Abstract: A metamaterial comprises a plurality of electrically controllable metamaterial units each comprising a varactor diode; the predetermined angle is an angle at which an electromagnetic wave is reflected from a surface of the metamaterial; there is an association relationship between the predetermined angle and the first phase difference; the method comprises: determining a first phase difference between electromagnetic waves reflected by two adjacent electrically controllable metamaterial units in a metamaterial based on a predetermined angle; determining a target capacitance of the varactor diode in each electrically controllable metamaterial unit based on the first phase difference; and adjusting a capacitance of the varactor diode in each electrically controllable metamaterial unit to the target capacitance.
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公开(公告)号：US20190074824A1
公开(公告)日：2019-03-07
申请号：US16184411
申请日：2018-11-08
Applicant: SHENZHEN SUPER DATA LINK TECHNOLOGY LTD.
Inventor： Ruopeng LIU , Chunlin JI , Jing NIE , Yanqing TAN
Abstract: The present invention discloses a metamaterial, and a method and an apparatus for adjusting a frequency of the metamaterial. The metamaterial includes a substrate material, and an electrically controllable microstructure unit array disposed on the substrate material and including a plurality of electrically controllable microstructure units. Each electrically controllable microstructure unit includes an external metal structure, an internal metal structure, and a varactor diode. The internal metal structure and the external metal structure define a ring-shaped channel. The varactor diode is disposed in the ring-shaped channel of each electrically controllable microstructure unit, and is configured for adjusting an operating frequency of each electrically controllable microstructure unit according to a voltage applied across the varactor diode. According to the present invention, a technical problem of failing to quickly and accurately adjust an operating frequency of the metamaterial in the prior art is solved.
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公开(公告)号：US10951346B2
公开(公告)日：2021-03-16
申请号：US16362485
申请日：2019-03-22
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng Liu , Chunlin Ji , Xingan Xu , Shasha Zhang
Abstract: This application discloses a decoding method for an OvXDM system, including: generating an augmented matrix B related to a received symbol information sequence; performing singular decomposition on the augmented matrix B; and performing decoding by using a total least square method, to obtain a decoded output information sequence. This application further discloses an OvXDM system. In a specific implementation of this application, decoding is performed by using the total least square method.
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公开(公告)号：US10742456B2
公开(公告)日：2020-08-11
申请号：US16256894
申请日：2019-01-24
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng Liu , Chunlin Ji , Changwei Lv , Shasha Zhang
Abstract: The present invention provides a signal modulation method. The method includes: generating a transmit signal pulse waveform, where a width of the pulse waveform is τ, each pulse waveform is associated with n symbols (n>1), a width of each symbol is Δτ, and Δτ = τ n ; performing an operation on every n consecutive symbols in a to-be-sent symbol flow and the pulse waveform according to a preset operation manner, to generate an associated signal of the symbols and the pulse waveform; and sending the associated signal by using a transmission channel. The present invention helps improve spectral efficiency of a system. In addition, symbols are mutually constrained based on a correlation between the symbols, and information symbols are scattered to a plurality of symbols, thereby helping improve a capability of resisting noise and attenuation by a signal.
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公开(公告)号：US20190229838A1
公开(公告)日：2019-07-25
申请号：US16254548
申请日：2019-01-22
Applicant: Shenzhen Super Data Link Technology Ltd.
Inventor： Ruopeng Liu , Chunlin Ji , Xingan Xu , Zihong Liu , Shasha Zhang
Abstract: This application discloses a fast decoding method and device suitable for an OvXDM system, and an OvXDM system. According to this method, there is no need to traverse all state nodes and expanded paths of the state nodes in a decoding process, and only some state nodes and paths are selected through measure sorting for expansion. Therefore, the decoding complexity can be greatly reduced and decoding efficiency is improved. The decoding complexity does not increase drastically as a number K of times of overlapped multiplexing increases, as in a conventional decoding solution. This resolves the problem that the spectral efficiency conflicts with the decoding complexity and the decoding efficiency.
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