-
公开(公告)号：US11303306B2
公开(公告)日：2022-04-12
申请号：US17153223
申请日：2021-01-20
申请人： Parsons Corporation
摘要： Capturing, extracting and storing narrowband IQ data for later processing enables timely and efficient analysis. As wideband capture of RF information includes noise and non-signal elements, the present invention detects, extracts and stores narrowband IQ signals for later assessment. By transforming a high-volume data stream to a collection of smaller narrowband signals with greatly reduced storage and on-board processing requirements the present invention facilitates the capability to analyze signals of interest in an otherwise denied environment.
-
公开(公告)号：US10560134B2
公开(公告)日：2020-02-11
申请号：US15888612
申请日：2018-02-05
申请人： Tan Huy Ho , Xinyu Xu , David Neal Wessel
发明人： Tan Huy Ho , Xinyu Xu , David Neal Wessel
摘要： A system and method for frequency-agnostic multiband aggregation of received signals is disclosed for use in high capacity communication. The system includes two up-conversion mixer stages and one down-conversion mixer stage, with SAW filter banks or other band pass filter banks used to select frequency bands of interest for aggregation based on configurable multiband combination settings. The method provides for the design of optimal multiband aggregation configuration settings.
-
公开(公告)号：US10476678B2
公开(公告)日：2019-11-12
申请号：US15469667
申请日：2017-03-27
发明人： Yiran Xu , Gang Wang , Sixiao Wei , Genshe Chen , Khanh Pham , Erik Blasch
摘要： Methods and systems for cyber secure data communications are provided. In some embodiments, a method for transmitting data comprises: performing a marker-based data encoding process to embed a digital watermark into each of a plurality of original data flows to be transmitted to a plurality of receivers; performing a non-orthogonal multiple access process to allocate transmission powers to the plurality of original data flows, such that the plurality of original data flows are simultaneously superposed on a carrier frequency to generate a superposed signal; performing a noise modulation process to modulate the superposed signal to generate a noise-like signal and a reference noise signal; transmitting the noise-like signal and the reference noise signal through orthogonally polarized antennas; and performing a portal-based data integrity analysis process to check whether a receiver in the plurality of receivers is compromised or manipulated.
-
公开(公告)号：US10305709B2
公开(公告)日：2019-05-28
申请号：US15679917
申请日：2017-08-17
申请人： Synaptics Japan GK
发明人： Yoshihiko Hori , Takefumi Seno , Keiichi Itoigawa , Jun Kurosawa , Takashi Tamura , Hideaki Kuwada , Kazuhiko Kanda , Tomoo Minaki
摘要： A semiconductor device includes first and second buffers respectively outputting reception data and clock signals; a latch circuit latching the reception data signal in response to the reception clock signal; a delay circuitry delaying the reception clock signal by a set delay time; and a delay control circuitry which searches a first delay time while increasing the set delay time from an initial value; searches a second delay time while increasing the set delay time from the first delay time; searches a third delay time while decreasing the set delay time from the second delay time; and determines an optimum delay time from the first and third delay times. The first and third delay times are determined so that the reception data is stabilized to a first value and the second delay time is determined so that the reception data is stabilized to a second value.
-
公开(公告)号：US10305477B2
公开(公告)日：2019-05-28
申请号：US16112434
申请日：2018-08-24
摘要： This disclosure relates to leakage current reduction in integrated circuits (ICs). In one aspect, an IC can include a digital logic circuit and a polarization circuit. The digital logic circuit can have a plurality of inputs and can include a plurality of logic gates. The polarization circuit can receive a standby signal and a digital input signal comprising a plurality of bits. When the standby signal is deactivated, the polarization circuit can control the plurality of inputs of the digital logic circuit based on the digital input signal. However, when the standby signal is activated the polarization circuit can control the plurality of inputs of the digital logic circuit to a low power state associated with a smaller leakage current of the plurality of logic gates relative to at least one other state of the digital logic circuit.
-
公开(公告)号：US10193659B2
公开(公告)日：2019-01-29
申请号：US15362364
申请日：2016-11-28
发明人： Paul Dean Alexander
IPC分类号： H04L27/06 , H03K9/00 , H03D1/00 , H04L1/00 , H04L25/02 , H03M13/41 , H03M13/00 , H04L25/03 , H04L27/26 , H03M13/11 , H03M13/29 , H04L1/20
摘要： The present invention relates to a method and apparatus for channel estimation between a transmitter and a receiver in a wireless communications system. In one arrangement, the method comprises: receiving at the receiver a first sequence of bits representing a first sequence of coded symbols transmitted over the communications channel; decoding the first sequence of coded symbols using maximum-likelihood based decoding including: generating traceback outcomes by tracing backwards the first sequence of bits through a maximum-likelihood based traceback path, the traceback outcomes including a first portion associated with a first traceback depth and a second portion associated with a second traceback depth that is deeper than the first traceback depth; generating a channel estimate of the communications channel based on the first portion of the traceback outcomes; and generating an estimate of at least some information bits coded in the first sequence of coded symbols based on the second portion of the traceback outcomes.
-
公开(公告)号：US10044547B2
公开(公告)日：2018-08-07
申请号：US14927794
申请日：2015-10-30
发明人： Fu-Lung Hsueh , William Wu Shen , Lan-Chou Cho
摘要： A digital code recovery circuit includes a data transmitter that outputs either input data or a preamble code as transmitter data. A radio frequency interconnect (RFI) transmitter modulates carrier signals based on the transmitter data and transmits the modulated carrier signals over a channel to an RFI receiver that demodulates the carrier signals to obtain recovered transmitter data. A calibration storage device stores preamble data and a calibration circuit receives the recovered transmitter data. If the recovered transmitter data originated from the preamble code, the calibration circuit determines a set of digital calibration adjustments from the recovered transmitter data and the preamble data. If the recovered transmitter data originated from the input data, the calibration circuit applies the set of digital calibration adjustments to the recovered transmitter data to obtain adjusted digital code and outputs the adjusted digital code.
-
公开(公告)号：US10044452B2
公开(公告)日：2018-08-07
申请号：US15816941
申请日：2017-11-17
申请人： KANDOU LABS, S.A.
发明人： Brian Holden , Amin Shokrollahi , Anant Singh
IPC分类号： H03K9/00 , H04L27/06 , H04B17/364 , H04B3/00 , H04B5/00 , H04L25/02 , H04B3/02 , H04L1/06 , H04L7/04 , H04L25/08 , H04L25/03 , H04L25/49
摘要： Advanced detectors for vector signaling codes are disclosed which utilize multi-input comparators, generalized on-level slicing, reference generation based on maximum swing, and reference generation based on recent values. Vector signaling codes communicate information as groups of symbols which, when transmitted over multiple communications channels, may be received as mixed sets of symbols from different transmission groups due to propagation time variations between channels. Systems and methods are disclosed which compensate receivers and transmitters for these effects and/or utilize codes having increased immunity to such variations, and circuits are described that efficiently implement their component functions.
-
公开(公告)号：US10020912B2
公开(公告)日：2018-07-10
申请号：US14206427
申请日：2014-03-12
申请人： SANS R&D, LLC
发明人： Nikola Alic , John G. Proakis
CPC分类号： H04L1/0006 , H04L1/0009 , H04L1/0045 , H04L25/0216 , H04L25/03171 , H04L69/04
摘要： The present invention relates to a method of improving the performance in bandwidth constrained communication systems while reducing the complexity of the equalizer used for information retrieval, as well as to improving the capacity of communication systems. The said properties are achieved by appropriate information encoding, prior to signal shaping before transmission, whereas the equalizer complexity is reduced by applying the intersymbol interference shortening filter prior to the information retrieving equalization. A proper combination of the recounted elements is capable of providing a qualitatively improved and previously unsuspected performance, as compared to its constituent elements.
-
公开(公告)号：US09991908B2
公开(公告)日：2018-06-05
申请号：US15271512
申请日：2016-09-21
申请人： The Boeing Company
发明人： Gary A. Ray
CPC分类号： H04B1/0053 , G01S7/021 , G06T7/0081 , G06T7/11 , H04B1/1638
摘要： A blind source separation (BSS) system comprises means for gathering wideband signal power spectral information without using special Fourier transform hardware/software systems and without using extremely large signal memories. The method involves taking the combined energy output of a large set of BSS filters that are operating under a blind source separation algorithm that looks for signals of interest, along with instantaneous filter characteristics such as center frequency, bandwidth and spectral response, and records a weighted spread energy into a frequency- and time-based histogram. This information can then be used to compare against the BSS signal output and signal energy which does not correspond to existing signal output is added to additional BSS signal output. This system can operate in real time, but uses long-term averaging to enhance signal detection.
-
-
-
-
-
-
-
-
-
搜索结果
1226 条记录 (耗时 0.029 秒)
