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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：US20180331866A1
公开(公告)日：2018-11-15
申请号：US16041910
申请日：2018-07-23
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Jacob C. Sharpe , Fei Tong , Myeong-Cheol Shin , Jeongtaek Lee
CPC classification number: H04L27/12 , H04L27/265 , H04L27/2657 , H04L27/2662 , H04L27/2672 , H04L27/2675 , H04L27/2682 , H04L27/2692 , H04W4/80
Abstract: A receiver configured to receive a frequency-modulated transmission having a preamble and a corresponding method are provided, the receiver having a buffer coupled to an input terminal for receiving the transmission, a time-to-frequency transformer coupled to the buffer, an energy aggregator coupled to the transformer, a preamble detector coupled to the aggregator, and a symbol synchronizer coupled to the detector; the method including receiving a sequence of time-domain frequency-modulated samples, transforming the sequence of time-domain samples into a spectrum of frequency-domain data, and matching an actual energy distribution over a plurality of discrete frequencies in the frequency-domain data with an expected energy distribution of the preamble to determine frequency error.
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公开(公告)号：US20240183965A1
公开(公告)日：2024-06-06
申请号：US18061510
申请日：2022-12-05
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Jacob Christopher Sharpe , Fei Tong
IPC: G01S11/08
CPC classification number: G01S11/08
Abstract: A one way ranging method estimates a distance between first and second wireless devices using a technique that involves exchanging dual tone RF signals between the devices and, at each of the first and second devices, maintaining “baseband coherence” between baseband signals carried by the RF signals transmitted and received by each respective device.
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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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5.发明授权公开(公告)号：US09160599B2
公开(公告)日：2015-10-13
申请号：US14095553
申请日：2013-12-03
Applicant: Samsung Electronics Co., Ltd.
Inventor： Chunyang Yu , Fei Tong , Paul C. McFarthing
IPC: H04L27/26
CPC classification number: H04L27/265 , H04L25/022 , H04L25/0258 , H04L27/2656 , H04L27/2671 , H04L27/2695
Abstract: Methods and apparatus are provided for receiving packets on a channel of an Orthogonal Frequency Division Multiplexing (OFDM) system. A time shift value for a packet is estimated using a channel estimation and an FFT size. A synchronization position of the packet on a channel is adjusted using the estimated time shift value, and a filter is applied to the adjusted channel to generate a smoothed channel estimate. Alternatively, a channel with a corrected packet synchronization position is estimated, and a smoothed channel is estimated by applying a filter to the estimated channel. Packets are received on the channel, at a receiver of the OFDM receiving apparatus, in accordance with the estimated smoothed channel.
Abstract translation: 提供了用于在正交频分复用（OFDM）系统的信道上接收分组的方法和装置。 使用信道估计和FFT大小来估计分组的时移值。 使用估计的时移值来调整分组在信道上的同步位置，并且将滤波器应用于经调整的信道以生成平滑信道估计。 或者，估计具有校正的分组同步位置的信道，并且通过对所估计的信道应用滤波器来估计平滑的信道。 根据估计的平滑信道，在OFDM接收装置的接收机处在信道上接收分组。
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Patent Agency Ranking
公开(公告)号：US11525909B2
公开(公告)日：2022-12-13
申请号：US16690857
申请日：2019-11-21
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Fei Tong , Jacob Christopher Sharpe
Abstract: A measurement method performed at a receiving device involves sequentially receiving RF signals, each comprising a different set of at least first and second tones at differing frequencies. Complex gain responses (CGRs) for each of the first and second tones of each of the RF signals are measured. A phase offset is determined between: i) a phase of the CGR of the second tone of a first RF signal, and ii) a phase of the CGR of the first tone of a second RF signal. A coherent channel frequency (CCF) response of the second tone of the second RF signal is computed by adjusting a phase of the CGR of the second tone of the first RF signal by the phase offset. A processor executes a signal paths calculation algorithm using the CCF response of the second tone of the second RF signal to determine an angle or time of arrival of the first RF signal.
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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：US10168416B1
公开(公告)日：2019-01-01
申请号：US15857921
申请日：2017-12-29
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Fei Tong
Abstract: A method of determining a time of arrival (ToA) of a wireless transmission includes: sampling a signal received in a wireless transmission to generate first data in a time domain, performing a FFT on the first data to generate second data in a frequency domain, dividing the second data by a reference signal to obtain a channel frequency response, performing and IDFT on the channel frequency response to obtain a channel impulse response, determining a peak in the channel impulse response; and determining the ToA based on the peak.
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公开(公告)号：US20250023592A1
公开(公告)日：2025-01-16
申请号：US18220235
申请日：2023-07-10
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Fei Tong , Paul Nicholas Fletcher
IPC: H04B1/04
Abstract: A method of digital memoryless pre-distortion includes receiving an input digital signal from a signal source, calculating a look-up table (LUT) address from the input signal and a power scale, updating an LUT value associated with the LUT address based on the input signal and an output signal that is output from a power amplifier to a wireless communications channel, linearizing the output signal with the updated LUT value, and outputting the output signal to the wireless communications channel. The steps of updating an LUT value associated with the LUT address and linearizing the output signal with the updated LUT value are repeated until a level of linearization is achieved that meets a pre-defined standard.
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公开(公告)号：US20200166631A1
公开(公告)日：2020-05-28
申请号：US16690857
申请日：2019-11-21
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Fei Tong , Jacob Christopher Sharpe
Abstract: A measurement method performed at a receiving device involves sequentially receiving RF signals, each comprising a different set of at least first and second tones at differing frequencies. Complex gain responses (CGRs) for each of the first and second tones of each of the RF signals are measured. A phase offset is determined between: i) a phase of the CGR of the second tone of a first RF signal, and ii) a phase of the CGR of the first tone of a second RF signal. A coherent channel frequency (CCF) response of the second tone of the second RF signal is computed by adjusting a phase of the CGR of the second tone of the first RF signal by the phase offset. A processor executes a signal paths calculation algorithm using the CCF response of the second tone of the second RF signal to determine an angle or time of arrival of the first RF signal.
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