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公开(公告)号：US11671793B2
公开(公告)日：2023-06-06
申请号：US17313473
申请日：2021-05-06
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Abstract: The present disclosure describes systems and methods for time-of-arrival (TOA) estimation techniques. Some embodiments of the disclosure provide for estimating radio propagation path parameters based on a training signal received over a set of active frequencies. The radio propagation path parameters (e.g., fading coefficients for each path) are used to reconstruct a channel frequency response on null frequencies (e.g., frequencies that did not include or carry the received training signal). A time-of-arrival parameter can then be estimated based on the estimated channel frequency response and the reconstructed channel frequency response (e.g., the channel frequency response estimated using both active frequencies and null frequencies).
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Patent Agency Ranking
2.发明申请公开(公告)号：US20230111606A1
公开(公告)日：2023-04-13
申请号：US17805698
申请日：2022-06-07
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Abstract: One or more aspects of the techniques and models described herein provide for bidirectional recurrent neural network (BiRNN)-based digital pre-distortion techniques for radio frequency (RF) power amplifiers (PAs). As an example, a digital pre-distorter (DPD) system may implement residual learning and long short-term memory (LSTM) projection layer features to reduce computational complexity and memory requirements. Implementing the described unconventional techniques of applying residual learning in RNN (e.g., in BiLSTM), using LSTM projection to develop a DPD structure, or both, may provide several advantages over preexisting techniques. For instance, the complexity in training and pre-distortion may be reduced and significantly less memory may be required to store the DPD neural network coefficients (e.g., while achieving similar or better linearization performance compared to other LSTM models). Further, faster training convergence speed may be achieved (e.g., compared to other LSTM models).
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公开(公告)号：US20240348273A1
公开(公告)日：2024-10-17
申请号：US18422913
申请日：2024-01-25
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Paul Nicholas Fletcher , Donghan Kim , Fei Tong , Ziming He
CPC classification number: H04B1/0475 , H03F1/3241 , H03F3/245 , H03F2200/451 , H04B2001/0408
Abstract: A distortion apparatus for a power amplifier comprises: pre-distortion circuitry that comprises a memory polynomial look-up-table (LUT) circuit; and post-distortion circuitry that updates the pre-distortion circuitry based on an output of the power amplifier. The pre-distortion circuitry comprises a plurality of LUTs. Each LUT corresponds to a different memory depth of a memory polynomial of a Volterra series. Each LUT indexed by an instantaneous power of an input sample delayed by an amount corresponds to a respective memory depth of each LUT. An output of the memory polynomial LUT circuit corresponds to a summation of an output of each LUT multiplied by the input sample delayed by the amount corresponding to the respective memory depth of each LUT, and an output of the pre-distortion circuitry is provided to the power amplifier.
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公开(公告)号：US20240171426A1
公开(公告)日：2024-05-23
申请号：US18207427
申请日：2023-06-08
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Ziming He
IPC: H04L25/02 , H04B17/336 , H04L25/03
CPC classification number: H04L25/0202 , H04B17/336 , H04L25/03828
Abstract: A communication device, including a receiver configured to receive a signal from a transmitter, the signal including a plurality of data symbols; and at least one processor configured to: obtain a channel estimate and an estimated carrier frequency offset based on a result of an interference detection indicating whether interference is detected in the plurality of data symbols, obtain a data symbol of the plurality of data symbols, obtain a compensated data symbol corresponding to the data symbol based on the estimated carrier frequency offset, obtain an equalized compensated data symbol by performing channel equalization on the compensated data symbol based on the channel estimate, and demodulate and decode the equalized compensated data symbol to obtain decoded data.
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公开(公告)号：US20220191245A1
公开(公告)日：2022-06-16
申请号：US17455485
申请日：2021-11-18
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Fei Tong , Ziming He , Jacob Sharpe
Abstract: A method for detecting a modification, due to an interferer, of a wireless channel between a transmitting device and a receiving device. First and second samples of channel frequency response (CFR) of the wireless channel are measured within a time interval less than or equal to a pre-established static time interval throughout which the wireless channel is expected to exhibit a static characteristic in an environment without any interferer. An interferer is detected to have modified the wireless channel when a similarity condition reflecting a degree of similarity between the first and second CFR samples is not satisfied.
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公开(公告)号：US20220191646A1
公开(公告)日：2022-06-16
申请号：US17313473
申请日：2021-05-06
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Abstract: The present disclosure describes systems and methods for time-of-arrival (TOA) estimation techniques. Some embodiments of the disclosure provide for estimating radio propagation path parameters based on a training signal received over a set of active frequencies. The radio propagation path parameters (e.g., fading coefficients for each path) are used to reconstruct a channel frequency response on null frequencies (e.g., frequencies that did not include or carry the received training signal). A time-of-arrival parameter can then be estimated based on the estimated channel frequency response and the reconstructed channel frequency response (e.g., the channel frequency response estimated using both active frequencies and null frequencies).
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