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公开(公告)号：US11012266B2
公开(公告)日：2021-05-18
申请号：US16221389
申请日：2018-12-14
发明人： Song Pan , Liwei Shen , Guangsheng Chen
摘要： Provided are a sub-carrier estimation method in a multi-carrier communication system and an apparatus. The method includes: receiving a data frame transmitted by a transmitting end, and extracting a training sequence from the data frame; performing fast Fourier transform operation on the training sequence and a preset reference sequence, respectively, to obtain frequency domain data of the training sequence and frequency domain data of the reference sequence, and conjugately multiplying the two kinds of frequency domain data; extracting real part of conjugate multiplication result; averaging values in each column of an M×N array, respectively, to obtain an output array of 1 row and N columns; and estimating, according to the value in each column of the output array of 1 row and N columns, whether valid data is transmitted over N sub-carriers corresponding to the output array of 1 row and N columns.
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公开(公告)号：US09722831B2
公开(公告)日：2017-08-01
申请号：US15164741
申请日：2016-05-25
发明人： Liwei Shen , Ruijin Liu , Song Pan
IPC分类号： H04L27/14 , H04L27/152 , H04B1/10 , H03J1/00 , H04L27/148
CPC分类号： H04L27/152 , H03J1/0008 , H04B1/1027 , H04L27/148
摘要： The invention provides a carrier frequency offset processing method, an apparatus and a receiver. The method comprises: receiving, through a software and hardware interface, an estimated value of frequency offset of a data packet transmitted by an automatic frequency offset control module; collecting the received estimated value of frequency offset of the data packet and performing statistical analysis to obtain a statistical value of carrier frequency offset between a receiving module and a transmitting module; and dynamically adjusting, according to the statistical value of carrier frequency offset, a bandwidth of a low-pass filter through the software and hardware interface. The invention realizes dynamic adjustment of the bandwidth of the low-pass filter in the process of a receiver receiving signals, solving the problem of the impact on processing performance brought by the fixed bandwidth of a low-pass filter in the prior art.
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3.发明授权公开(公告)号：US11641295B1
公开(公告)日：2023-05-02
申请号：US17543906
申请日：2021-12-07
发明人： Liwei Shen , Guangsheng Chen , Song Pan
摘要： A method and device for estimating a carrier frequency offset, and a computer-readable storage medium are provided. The method includes: determining a target area where a phase discrimination signal is located, wherein the target area is one of N numbers of candidate areas, the N numbers of candidate areas correspond to different value ranges, an union range of the N numbers of candidate areas is [π, −π], and N≥2; determining a first estimation value of a direct current component corresponding to the phase discrimination signal based on the target area; and performing a carrier frequency offset compensation on the phase discrimination signal based on the first estimation value of the direct current component.
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