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Patent Agency Ranking
公开(公告)号：US20170048093A1
公开(公告)日：2017-02-16
申请号：US15341543
申请日：2016-11-02
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huang HUANG , Xi YAN , Sainan LI
CPC classification number: H04L27/2656 , H04L7/0016 , H04L27/26 , H04L27/2657 , H04L27/2675 , H04W56/004
Abstract: Embodiments of the present invention provide a frame synchronization method and apparatus, which can reduce impact of a carrier frequency offset. In those embodiment, a solution is provided and the solution includes: obtaining a received signal of a receiving antenna; calculating an auto-correlation value of the received signal and determining a time corresponding to the auto-correlation value that is of the received signal and that meets a first preset condition, as an initial estimation time; obtaining a carrier frequency offset estimation value according to the initial estimation time, the received signal, and a frequency offset estimation algorithm, and performing frequency offset compensation on the received signal by using the carrier frequency offset estimation value; calculating a cross-correlation value and an auto-correlation value of the received signal on which the frequency offset compensation has been performed. The embodiments of the present invention are used for frame synchronization.
Abstract translation: 本发明的实施例提供了一种可以减少载波频率偏移的影响的帧同步方法和装置。 在这些实施例中，提供一种解决方案，其解决方案包括：获得接收天线的接收信号; 计算接收信号的自相关值，并确定与接收信号的自相关值相对应并且满足第一预置条件的时间作为初始估计时间; 根据初始估计时间，接收信号和频率偏移估计算法获得载波频率偏移估计值，并通过使用载波频率偏移估计值对接收信号执行频偏补偿; 计算已经执行了频偏补偿的接收信号的互相关值和自相关值。 本发明的实施例用于帧同步。
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公开(公告)号：US20150098531A1
公开(公告)日：2015-04-09
申请号：US14516126
申请日：2014-10-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Dmitri RIABKOV , Xi YAN , Guangjian WANG
CPC classification number: H04L1/0054 , H04L25/067 , H04L27/38
Abstract: The present invention provides a signal demodulation method and device. The method includes: obtaining a symbol probability parameter, where the symbol probability parameter comprises: an amplitude ry and a phase angle φy of a receive signal, an amplitude rxj and a phase angle φxj of each constellation point xj in a decision constellation point set, and a standard deviation σn of Gaussian noise and a standard deviation πθ of phase noise;calculating, according to the symbol probability parameter, a symbol probability that a transmit signal is each constellation point xj in the decision constellation point set; and performing demodulation according to the symbol probability, and outputting demodulation information. The present invention improves an anti-phase-noise capability.
Abstract translation: 本发明提供一种信号解调方法和装置。 该方法包括：获得符号概率参数，其中符号概率参数包括：接收信号的振幅ry和相位角＆amp; y，决策中每个星座点xj的振幅rxj和相位角＆lt; xj 星座点集，以及高斯噪声和标准偏差的标准偏差＆amp; 的相位噪声; 根据符号概率参数，计算发射信号在决策星座点集合中的每个星座点xj的符号概率; 并根据符号概率进行解调，并输出解调信息。 本发明提高了抗相位噪声能力。
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公开(公告)号：US20200295872A1
公开(公告)日：2020-09-17
申请号：US16887915
申请日：2020-05-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xi YAN , Huixiao MA , Wai Kong Raymond LEUNG , Long LUO , Yan CUI
Abstract: Embodiments of this application provide a modulation method and apparatus. The method includes: receiving a code word sequence, where each code word includes N bits, and the code word sequence includes at least a first code word; mapping the code word sequence into M sequences, where each sequence includes N/M bits from the first code word; mapping the M sequences into a symbol sequence, where each symbol is corresponding to M bits, the M bits are respectively from the M sequences, first bits corresponding to N/M first-type symbols are from the first code word, and second bits corresponding to N/M second-type symbols are from the first code word. Thus a signal-to-noise ratio requirement during higher order modulation lowered.
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公开(公告)号：US20190013824A1
公开(公告)日：2019-01-10
申请号：US16130293
申请日：2018-09-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xi YAN , Huixiao MA , Wai Kong Raymond LEUNG , Long LUO , Yan CUI
CPC classification number: H03M7/40 , H03M13/25 , H04L1/0041 , H04L1/0058 , H04L1/0071
Abstract: Embodiments of this application provide a modulation method and apparatus. The method includes: receiving a code word sequence, where each code word includes N bits, and the code word sequence includes at least a first code word; mapping the code word sequence into M sequences, where each sequence includes N/M bits from the first code word; mapping the M sequences into a symbol sequence, where each symbol is corresponding to M bits, the M bits are respectively from the M sequences, first bits corresponding to N/M first-type symbols are from the first code word, and second bits corresponding to N/M second-type symbols are from the first code word. Thus a signal-to-noise ratio requirement during higher order modulation lowered.
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5.发明申请公开(公告)号：US20160072644A1
公开(公告)日：2016-03-10
申请号：US14942928
申请日：2015-11-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Huang HUANG , Xi YAN , Guangjian WANG
CPC classification number: H04L25/0204 , H04B7/0413 , H04B7/0615 , H04L5/0007 , H04L25/0224 , H04L25/0228 , H04L27/261 , H04L27/2647 , H04L2027/003
Abstract: Embodiments of the present invention provide a method for signal compensation. The method includes: receiving, by a receiver via N receiving antennas, a plurality of channel estimation preamble signals sent by M transmitting antennas of a remote transmitter, wherein the plurality of channel estimation preamble signals contain measurement signals of the M transmitting antennas; determining, by the receiver, channel estimation parameters and channel phase shift parameters according to the measurement signals of the M transmitting antennas of the remote transmitter; and determining, by the receiver, signal compensation according to the channel estimation parameters and the channel phase shift parameters. According to the method for signal compensation and the multiple-input multiple-output orthogonal frequency division multiplexing communication system provided by the embodiments of the present invention, accuracy of an estimated value of transmitted data is improved.
Abstract translation: 本发明的实施例提供了一种用于信号补偿的方法。 该方法包括：通过N个接收天线由接收机接收由远程发射机的M个发射天线发送的多个信道估计前导信号，其中多个信道估计前导信号包含M个发射天线的测量信号; 根据远程发射机的M个发射天线的测量信号，由接收机确定信道估计参数和信道相移参数; 以及由接收机根据信道估计参数和信道相移参数确定信号补偿。 根据本发明实施例提供的信号补偿方法和多输入多输出正交频分复用通信系统，提高了传输数据估计值的精度。
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