Correlative Or Matched Filter Patents (Class 375/343)
  • Patent number: 11653366
    Abstract: A wireless device selects a first downlink reference signal from one or more downlink reference signals based on a received signal strength of the first downlink reference signal being above a value. Based on an index of the first downlink reference signal, a radio network identifier is determined. A downlink control information (DCI) addressed to the radio network identifier and indicating one or more random access occasions (ROs) is received. In response to receiving the DCI, a preamble is transmitted via one of the one or more ROs.
    Type: Grant
    Filed: February 2, 2022
    Date of Patent: May 16, 2023
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventors: Nazanin Rastegardoost, Esmael Dinan, Hyoungsuk Jeon, Hua Zhou, Kai Xu
  • Patent number: 11611369
    Abstract: A data receiver is configured to receive a signal including a plurality of partial data packets, wherein the plurality of partial data packets each include part of a data packet, wherein the data receiver includes a multi-stage correlator that is configured to perform multi-stage correlation to detect the partial data packets in the received signal, wherein a second correlation stage of the multi-stage correlator operates based on correlation results of a first correlation stage of the multi-stage correlator.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: March 21, 2023
    Inventors: Eberhard Gamm, Gerd Kilian, Jakob Kneißl, Josef Bernhard, Markus Siebenhaar
  • Patent number: 11570706
    Abstract: Aspects relate to Layer 1/Layer 2-centric inter-cell mobility communication systems where measurement information from at least one user equipment (UE) is sent to a base station. Based on this information, the base station may select at least one of a remote radio head (RRH), a serving cell, or a cell assigned with a physical cell ID that serves a particular UE using one of Layer 1 or Layer 2 control signaling based on the received measurement information and a system serving cell configuration or mode of operation. Additionally, an indication may be provided of whether cell configurations are the same for target and source cells in an inter-cell handover and a UE may utilize the same source cell configuration during a handover when connecting with the target cell when the configurations match or at least partially match.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: January 31, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Qian Zhang, Yan Zhou, Tao Luo
  • Patent number: 11558147
    Abstract: Methods and apparatus for decoding received uplink transmissions using log-likelihood ratio optimization. In an embodiment, a method includes soft-demapping resource elements based on soft-demapping parameters as part of a process to generate log-likelihood ratios (LLR) values, decoding the LLRs to generate decoded data, and identifying a target performance value. The method also includes determining a performance metric from the decoded data, and performing a machine learning algorithm that dynamically adjusts the soft-demapping parameters to move the performance metric toward the target performance value.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: January 17, 2023
    Assignee: Marvell Asia Pte, Ltd
    Inventors: Sabih Guzelgoz, Hong Jik Kim
  • Patent number: 11539568
    Abstract: There is provided an apparatus for detecting repetitive information in data packets communicated between a first node and a second node over a wireless network. The apparatus includes a processing circuitry. The processing circuitry is configured to: (a) collect samples of a data communication signal transmitted between said first node and the second node over said wireless network at a plurality of respective times; (b) group the collected samples into a plurality of sequences of samples; (c) combine the sequences of samples into at least one united signal; and (d) based on an analysis of the at least one united signal, provide a signal indicative of repetitive information in a plurality of data packets carried by said data communication signal.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: December 27, 2022
    Inventors: Assaf Monsa Chermon, Hanan Leizerovich
  • Patent number: 11533207
    Abstract: A radio receiver comprises a matched filter bank and a decision unit. The matched filter bank has a plurality of filter modules for generating correlation-strength data from a sampled radio signal, each filter module being configured to cross-correlate the sampled signal with data representing a respective filter sequence. The decision unit is configured to use the correlation-strength data to generate a sequence of decoded symbols from the sampled signal. The matched filter bank and/or decision unit are configured to determine the value of each symbol in the sequence in part based on the value of a respective earlier decoded symbol from the sequence of decoded symbols.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: December 20, 2022
    Assignee: Nordic Semiconductor ASA
    Inventors: Daniel Ryan, Wei Li
  • Patent number: 11533126
    Abstract: A method comprises: receiving, from a communication channel, non-binary multilevel symbols that represent corresponding multibit labels each including at least a least-significant bit (LSB) and a most-significant bit (MSB), the non-binary multilevel symbols mapped to the multibit labels according to set-partition labeling, which partitions the non-binary multilevel symbols between a first set and a second set according to a first value and a second value of the LSB, respectively; digitizing the non-binary multilevel symbols to produce symbol samples; and performing Soft-Output-Viterbi (SOV) equalization of the non-binary multilevel symbols based on the symbol samples, to produce decoded symbol information corresponding to the non-binary multilevel symbols.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: December 20, 2022
    Inventors: Stefan Helmut Müller-Weinfurtner, Andreas Bernhard Bisplinghoff
  • Patent number: 11522668
    Abstract: A method applicable to a receiver circuit, including: performing a cross-correlation operation upon at least one time-domain signal on at least one receiver path of the receiver circuit according to a local sequence signal, to estimate at least one time offset amount of the at least one time-domain signal as at least one time offset compensation amount; and, performing time offset compensation upon the at least one time-domain signal on the at least one receiver path according to the at least one time offset compensation amount.
    Type: Grant
    Filed: July 4, 2021
    Date of Patent: December 6, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventor: Lihua Wang
  • Patent number: 11474225
    Abstract: A chip-implementation of a millimeter wave MIMO radar comprises transmitters for transmitting short bursts of digitally modulated radar carrier signals and receivers for receiving delayed echoes of those signals. Various signal formats defined by the number of bits per transmit burst, the transmit burst duration, the receive period duration, the bitrate, the number of range bins, and the number of bursts per scan, facilitate the choice of modulating bit patterns such that when correlating for target echoes over an entire scan, the correlation codes for different ranges and different transmitters are mutually orthogonal or nearly so. In the event of imperfect orthogonality, simple orthogonalization schemes are revealed, such as subtraction of strong already-detected target signals for better detecting weaker signals or moving targets that are rendered non-orthogonal by their Doppler shift.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: October 18, 2022
    Assignee: Uhnder, Inc.
    Inventors: Paul W. Dent, Curtis Davis, Murtaza Ali
  • Patent number: 11476975
    Abstract: A receiver is configured to capture a plurality of linearly distorted OFDM symbols transmitted over a signal path. The receiver forms the captured OFDM symbols into an overlapped compound data block that includes payload data and at least one pseudo-extension, processes the overlapped compound block with circular convolution in the time domain using an inverse channel response, or frequency domain equalization, to produce an equalized compound block, and discards end portions of the equalized block to produce a narrow equalized block. The end portion corresponds with the pseudo-extension, and the narrow block corresponds with the payload data. The receiver cascades multiple narrow equalized blocks to form a de-ghosted signal stream of OFDM symbols. The OFDM symbols may be OFDM or OFDMA, and may or may not include a cyclic prefix, which will have a different length from the pseudo-extension.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: October 18, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas H. Williams, Gregory Charles White
  • Patent number: 11457423
    Abstract: A radio receiver device is arranged to store samples of incoming data symbols in an indexed memory portion having a length of A+B+C. A first data buffer 20-1 has an initial address at index 0 and a final address at index A-1. A timing adjustment buffer 22 has an initial address at index A and a final address at index A+B?1. A second data buffer 20-2 has an initial address at an index A+B and a final address at an index A+B+C?1. A buffer switch pointer 24 has a trigger address between the index 0 and the index A+B?1, at which it triggers a switch 26 from the first to the second buffer. If the current address matches the trigger address, the current address is set to the index A+B. Otherwise, the current address is incremented. If there is a timing offset between local and network clocks, the trigger address is moved to reduce the offset.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: September 27, 2022
    Assignee: Nordic Semiconductor ASA
    Inventors: Ilari Kukkula, Tapani Jaakola
  • Patent number: 11444811
    Abstract: Symbols are received on a downstream channel. A value of a channel synchronization parameter is determined based on the received symbols. An interference event on the downstream channel is detected. In response to detecting the interference event: an output signal is determined based on at least one cached value of the channel synchronization parameter, the at least one cached value being determined based on symbols received prior to and offset from the detecting of the interference event.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: September 13, 2022
    Assignee: Intel Corporation
    Inventors: Bernard Arambepola, Thushara Hewavithana
  • Patent number: 11444663
    Abstract: Methods and apparatus for orthogonal stream spatial multiplexing. In one embodiment, a method includes splitting and modulating a data stream into n MIMO RF spatial streams and coupling them to corresponding switchable polarization antenna elements controlled via orthogonal binary codes for transmission. Each transmitted stream manifests as time-varying-polarization-orthogonal to the other n?1 spatial streams. The method includes reception of the streams at their destination using corresponding antenna elements controlled by the same set of orthogonal codes. Thus, each of the n transmitted spatial streams is polarization-match-filtered, unambiguously separated and individually recovered from all the others upon reception for subsequent demodulation and MIMO spatial recombination into the original data stream.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: September 13, 2022
    Inventor: Carlos A. Rios
  • Patent number: 11412387
    Abstract: The disclosed embodiments relate to a system that camouflages EMI fingerprints in EMI emissions from a computing system to enhance system security. During operation, the system monitors the EMI emissions from the computer system during operation of the computer system to produce corresponding EMI signals. Next, the system determines a dynamic amplitude of the EMI emissions based on the EMI signals. If the dynamic amplitude of the EMI emissions drops below a threshold value, the system executes synthetic transactions, which have interarrival times that, when superimposed on a workload of the computer system, cause the computer system to produce randomized EMI emissions.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: August 9, 2022
    Assignee: Oracle International Corporation
    Inventors: Kenny C. Gross, Ashin George, Guang C. Wang
  • Patent number: 11391847
    Abstract: Structures and techniques are disclosed that can be used to reduce or remove code multipath error in GNSS receivers by implementing one or more monitoring correlators in a multipath-error estimation and correction (MEC) module. The MEC module detects and provides for correction of correlation peak distortion. In exemplary embodiments, a code tracking loop integrates all-chip-edges of a PRN, and a narrow-correlator is used to update the tracking loop rate while a multipath estimation module implements a blanked correlator to estimate and remove the multipath bias from the code tracking loop measurements.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: July 19, 2022
    Assignee: NovAtel Inc.
    Inventor: Ali Broumandan
  • Patent number: 11387858
    Abstract: Various data transmission detection systems are described. A receiver input through which a wireless data transmission signal is received may be present. A plurality of mixers in communication with the receiver input may be present, which may be digitally implemented. A data transmission detector may be present that receives a mixed wireless data transmission signal from each mixer and creates a plurality of scores. A match detection module may be present that receives the scores and identifies a highest score. The signal mapped to the highest score to be selected for further processing.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: July 12, 2022
    Assignee: Hughes Network Systems, LLC
    Inventor: Qiujun Huang
  • Patent number: 11368199
    Abstract: A reception unit in a radio communication apparatus receives wirelessly a signal configured with a preamble from another radio communication apparatus. The synchronization detection unit uses the preamble included in the signal received by the reception unit to detect synchronization with another radio communication apparatus. The signal accumulation unit accumulates a signal extracted from the signal received by the reception unit based on a timing at which the synchronization is detected by the synchronization detection unit. The combining unit combines the signals accumulated in the signal accumulation unit in accordance with a blind adaptive array antenna algorithm. The demodulation unit demodulates the signals combined by the combining unit.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: June 21, 2022
    Inventors: Hajime Katsuda, Yosuke Fujino, Kazunori Akabane
  • Patent number: 11336497
    Abstract: Systems and methods for a non-data-aided (NDA) approach to advanced OFDM timing are provided. This approach allows for accurate OFDM symbol timing and synchronization by avoiding inter-symbol interference (ISI) in multipath environments where an earliest arriving signal may not be the strongest signal. The NDA approach may rely on generating and applying a bias correction to a combined correlation result of the multi-path signals.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: May 17, 2022
    Assignee: Sirius XM Radio Inc.
    Inventors: Edward Schell, Carl Scarpa
  • Patent number: 11330635
    Abstract: This application provides an information transmission method and apparatus. The method includes: sending, by a network device, first information, where the first information indicates a first parameter, and the first parameter is at least one of 237, 216, 195, 173, 152, 137, 132, 127, 121, 117, 112, 108, 103, 99, 94, 91, 89, 86, 84, 81, 77, 74, 72, 69, 68, 67, 66, 64, 63, 62, 61, 59, 58, and 57, or at least one of 153, 137, 122, 109, 97, 85, 81, 77, 74, 71, 68, 65, 63, 60, 57, 55, 53, 51, 50, 48, 47, and 45. According to the information transmission method and apparatus provided in this application, information used to generate a random access preamble sequence can be configured for a terminal device.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: May 10, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhiheng Guo, Fredrik Berggren, Xinqian Xie, Yue Zhao
  • Patent number: 11310838
    Abstract: Certain aspects of the present disclosure provide techniques and apparatus for signaling channel preemption indications that enable a user equipment (UE) of a first type to take one or more actions on resources that are re-allocated to an UE of a second type. An exemplary method generally includes determining that resources allocated for a scheduled transmission by a first user equipment (UE) of a first type overlaps with uplink channel resources allocated to a second UE of a second type. The method also includes signaling, based on the determination, an uplink preemption indication (ULPI), to the second UE, that identifies at least some of the overlapping resources.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: April 19, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Chih Ping Li, Jing Jiang, Jing Sun, Wanshi Chen, Seyedkianoush Hosseini, Jay Kumar Sundararajan, Yi Huang
  • Patent number: 11290177
    Abstract: Disclosed embodiments relate to modular antenna systems. In one example, an antenna system includes M user terminal elements, each being application-agnostic and including an antenna either to generate an incoming signal in response to incident satellite radio waves or to transmit an outgoing signal, and an active circuit to process the incoming and outgoing signals, a control circuit to control the processing performed by the M active circuits, and N user terminal modules (UTM) each including a daisy-chain of O of the M active circuits, each UTM further including a buffer placed after every P active circuits in order to correct any degradation that has occurred in the daisy-chain, and wherein M can be adjusted so that an antenna area and a corresponding throughput and bandwidth available to an application are adjustable and scalable.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: March 29, 2022
    Assignee: UTVATE Corporation
    Inventors: Siamak Ebadi, Stefan William Turkowski, Andres Felipe Osorio, Amin Reda
  • Patent number: 11265093
    Abstract: A method for compensating group delay variations in a CDMA spread spectrum receiver, comprising: receiving an RF signal; generating an ideal replica signal; filtering the RF signal by one or more filters; obtaining an ideal auto-correlation function (ACF) of the ideal replica signal; distorting the ideal ACF to generate a distorted ACF by a filtering model of the one or more filters; aligning the ideal ACF and the distorted ACF; calculating a set of correction factors based on a ratio of the ideal ACF and the distorted ACF; calculating a cross-correlation signal based on the filtered RF signal and the ideal replica signal; and obtaining a compensated correlation signal by applying the set of correction factors to the cross-correlation signal.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: March 1, 2022
    Assignee: u-blox AG
    Inventor: Clemens Buergi
  • Patent number: 11258650
    Abstract: A communication method, a communications apparatus, and a storage medium are disclosed, to reduce a probability that consecutive bit errors occur in a communications system. A received to-be-sent signal is modulated to obtain a modulated signal, and N rounds of operations are further performed on the modulated signal to obtain an encoded signal. An output of the 1st-round operation in the N rounds of operations is determined based on the modulated signal and an output that is of the Nth-round operation and that is processed by a first delay circuit, and an output of the ith-round operation in the N rounds of operations is determined based on an output of the (i?1)th-round operation and an output that is of the Nth-round operation and that is processed by a second delay circuit, where i is an integer greater than 1 and less than or equal to N.
    Type: Grant
    Filed: December 24, 2019
    Date of Patent: February 22, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Tianjian Zuo, Sen Zhang
  • Patent number: 11259299
    Abstract: It is an object to provide a sequence allocating method that, while maintaining the number of Zadoff-Chu sequences to compose a sequence group, is configured to make it possible to reduce correlations between different sequential groups. This method comprises the steps of setting a standard sequence with a standard sequence length and a standard sequence number in a step, setting a threshold value in accordance with an RB number in a step, setting a sequence length corresponding to RB number in a step, judging whether ¦r/N-rb/Nb¦=Xth(m) is satisfied in a step, including a plurality of Zadoff-Chu sequences with a sequence number and a sequence length in a sequence group in a step if the judgment is positive, and allocating the sequence group to the same cell in a step.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: February 22, 2022
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takashi Iwai, Daichi Imamura, Tomofumi Takata, Yoshihiko Ogawa
  • Patent number: 11252002
    Abstract: There is disclosed a radio node for a wireless communication network, the radio node being adapted for processing reference signaling based on a coding, the coding being based on a Golay sequence. The disclosure also pertains to related devices and methods.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: February 15, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Henrik Sahlin, Ansuman Adhikary, Johan Axnäs, Robert Baldemair, Andres Reial
  • Patent number: 11146299
    Abstract: Embodiments of the invention include a wakeup receiver (WRX) featuring a charge-domain analog front end (AFE) with parallel radio frequency (RF) rectifier, charge-transfer summation amplifier (CTSA), and successive approximation analog-to-digital converter (SAR ADC) stages. The WRX operates at very low power and exhibits above-average sensitivity, random pulsed interferer rejections, and yield over process.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: October 12, 2021
    Assignee: EVERACTIVE, INC.
    Inventor: Kuo-Ken Huang
  • Patent number: 11137500
    Abstract: A method, apparatus, computer program, data structure, signal relating to: causing correlation of a digital signal provided by a receiver with a motion-compensated correlation code, wherein the motion-compensated correlation code is a correlation code that has been compensated before correlation using one or more phasors dependent upon an assumed or measured movement of the receiver.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: October 5, 2021
    Assignee: Focal Point Positioning Limited
    Inventors: Ramsey Faragher, Nicolas Couronneau, Mark Crockett, Peter Duffett-Smith
  • Patent number: 11133890
    Abstract: Adaptive multi-standard signal classification and synchronization is disclosed. Devices, systems and methods include an auto-correlation bank and a signal classifier to efficiently and reliably distinguish signals of wireless protocols, such as Bluetooth, 1 megabit-per-second (Mbps) Bluetooth low energy (BLE), 2 Mbps BLE, long range (LR) BLE, ZigBee (ZB), high-rate ZB, and so on. The auto-correlation bank includes a set of auto-correlators with different delays, which facilitate distinguishing between the different wireless protocols. Exemplary aspects can further distinguish and/or compensate for interference sources, such as WiFi, constant wave (CW) clock sources, and so on. In some examples, a frequency offset of an incoming signal can be output for further signal processing. In a parallel path, a cross-correlation circuit facilitates synchronization to the incoming signal based on a signal type identified by the signal classifier.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: September 28, 2021
    Assignee: Qorvo US, Inc.
    Inventor: Andrew Fort
  • Patent number: 11122552
    Abstract: Technology for a Next Generation NodeB (gNB) operable to encode downlink control information (DCI) for transmission to a user equipment (UE) is disclosed. The gNB can identify DCI for transmission from the gNB. The gNB can determine that a size of the DCI exceeds a defined threshold. The gNB can divide the DCI into one or more DCI segments. Each DCI segment can include header information to enable the one or more DCI segments to be assembled at the UE. The gNB can encode the one or more DCI segments of the DCI for transmission from the gNB to the UE.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: September 14, 2021
    Assignee: APPLE INC.
    Inventors: Dae Won Lee, Gang Xiong, Hong He, Seunghee Han
  • Patent number: 11115770
    Abstract: A multi-channel decorrelator for providing a plurality of decorrelated signals on the basis of a plurality of decorrelator input signals is configured to premix a first set of N decorrelator input signals into a second set of K decorrelator input signals, wherein K<N. The multi-channel decorrelator is configured to provide a first set of K? decorrelator output signals on the basis of the second set of K decorrelator input signals. The multi-channel decorrelator is further configured to upmix the first set of K? decorrelator output signals into a second set of N? decorrelator output signals, wherein N?>K?. The multi-channel decorrelator can be used in a multi-channel audio decoder. A multi-channel audio encoder provides complexity control information for the multi-channel decorrelator.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: September 7, 2021
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Sascha Disch, Harald Fuchs, Oliver Hellmuth, Juergen Herre, Adrian Murtaza, Jouni Paulus, Falko Ridderbusch, Leon Terentiv
  • Patent number: 11109337
    Abstract: A method for estimating an arrival time of a wireless communication signal comprises the steps of: receiving a packet including a first preamble, a second preamble, and a start of frame delimiter (SFD) by a receiver; estimating, by the receiver, a first delay time on the basis of a time point of demodulating the SFD and the symbol length of the first preamble; and estimating, by the receiver, a second delay time on the basis of an accumulated correlation degree calculated by performing an accumulated correlation calculation on the second preamble.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 31, 2021
    Inventors: Jae Hong Eom, Yunho Jung, Jeonghyeon Cheon, Hyunsu Hwang
  • Patent number: 11074458
    Abstract: A system and method for searching a video stream collected by a camera in a video surveillance system for an object's placement or displacement is disclosed. The searching includes an interactive question/answer approach that allows for a video snippet including the object's placement or displacement to be found quickly without the need for complicated video analytics. During the search, frames from algorithmically selected points in the video stream are presented to a user for review. The user reviews each frame and indicates if he/she sees the object. Based on the user's response the searching algorithmically reduces the portion video stream that is searched until a snippet of a video is found that includes the object's placement or displacement.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: July 27, 2021
    Inventor: Shahar Daliyot
  • Patent number: 11055122
    Abstract: A device configured to emulate a string correlithm object in a correlithm object processing system includes a string correlithm object generator configured to output a string correlithm object comprising a plurality of sub-string correlithm objects. Each sub-string correlithm object is adjacent in n-dimensional space to a preceding sub-string correlithm object and a subsequent sub-string correlithm object to form a string. A node is configured to receive a plurality of discrete data values. A memory is configured to store a node table that associates sub-string correlithm objects with discrete data values such that a first sub-string correlithm object is associated with a first discrete data value and a second sub-string correlithm object is associated with a second discrete data value.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: July 6, 2021
    Assignee: Bank of America Corporation
    Inventor: Patrick N. Lawrence
  • Patent number: 11038729
    Abstract: Methods, systems, and devices for wireless communications are described. A device (e.g., a base station or a user equipment (UE)) may identify a sequence length corresponding to a number of resource blocks, and select a modulation scheme based on the sequence length. The device may select, from a set of sequences associated with the modulation scheme, a sequence having the sequence length. In some examples, the set of sequences may include at least one of a set of time domain phase shift keying computer-generated sequences or a set of frequency domain phase shift keying computer-generated sequences. The device may generate a reference signal for a data transmission based on the sequence and transmit the reference signal within the number of resource blocks.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: June 15, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Wei Yang, Yi Huang, Seyong Park, Gokul Sridharan, Peter Gaal, Alexandros Manolakos, Xiao Feng Wang, Tingfang Ji
  • Patent number: 11012225
    Abstract: A synchronization detection method for new radio (NR) sidelink. In some embodiments, the method includes calculating a first delay compensated input signal, calculating a first correlation value, calculating a first correlation power, calculating a first weighted correlation power, and detecting a synchronization signal. The first delay compensated input signal may be based on an input signal, and an index of a first tap value. The first correlation value may be based on a first candidate sequence and the first delay compensated input signal. The first correlation power may be based on the first correlation value. The first weighted correlation power may be based on a first weighting factor, and the first correlation power. The detecting of the synchronization signal may include using the first weighted correlation power.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: May 18, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sili Lu, Hongbing Cheng
  • Patent number: 11002828
    Abstract: A method of using a multi-input multi-output (MIMO) antenna array for high-resolution radar imaging and wireless communication for advanced driver assistance systems (ADAS) utilizes a MIMO radar and at least one base station. The MIMO radar establishes wireless communication with the base station via an uplink signal. Likewise, the base station sends a downlink signal to the MIMO radar. Further, unlike conventional vehicle-to-everything (V2X) systems that filter the reflected uplink signal, the MIMO radar uses the reflected uplink signal to detect a plurality of targets. Accordingly, the MIMO radar derives spatial positioning data for each target from the reflected uplink signal.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: May 11, 2021
    Inventor: Tiejun Shan
  • Patent number: 10999105
    Abstract: Disclosed are a channel estimation method and device for improving accuracy of channel estimation so as to improve the performance of a receiver. The present application provides a channel estimation method, comprising: determining an equivalent pilot sequence by means of a historical effective frequency offset value; determining a sequence for multiple correlation by using the equivalent pilot sequence; and performing multiple correlation calculation of channel estimation by using the sequence for multiple correlation.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: May 4, 2021
    Inventors: Yuetan Chen, Xi Wang, Quanfei Hu
  • Patent number: 10992409
    Abstract: Provided in embodiments of the present disclosure is a wireless signal transmission method and device. The method includes: in presence of a plurality of sets of wireless signals having different configurations, cascading consecutive symbols in each of the plurality of sets of wireless signals into at least one symbol cascade block, where when lengths of valid symbols in any two sets of wireless signals of the plurality of sets of wireless signals having different configurations satisfy a proportional relationship of n:m, numbers of symbols in symbol cascade blocks of the two sets of wireless signals within a same time length satisfy a proportional relationship of m:n, and n and m are positive integers; and transmitting symbol cascade blocks of the plurality of sets of wireless signals in a preset order.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 27, 2021
    Inventors: Peng Hao, Junfeng Zhang, Feng Bi, Zhaohua Lu, Liujun Hu, Xinhui Wang, Gang Bai
  • Patent number: 10972139
    Abstract: Examples described herein include methods, devices, and systems which may compensate input data for nonlinear power amplifier noise to generate compensated input data. In compensating the noise, during an uplink transmission time interval (TTI), a switch path is activated to provide amplified input data to a receiver stage including a recurrent neural network (RNN). The RNN may calculate an error representative of the noise based partly on the input signal to be transmitted and a feedback signal to generate filter coefficient data associated with the power amplifier noise. The feedback signal is provided, after processing through the receiver, to the RNN. During an uplink TTI, the amplified input data may also be transmitted as the RF wireless transmission via an RF antenna. During a downlink TTI, the switch path may be deactivated and the receiver stage may receive an additional RF wireless transmission to be processed in the receiver stage.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: April 6, 2021
    Assignee: Micron Technology, Inc.
    Inventor: Fa-Long Luo
  • Patent number: 10965384
    Abstract: The invention relates to a method for suppressing an interference signal during detection of a chirp signal from an input signal (X), comprising the following steps: a. recording the input signal (X); b. calculating an output signal (R1) as a correlation from the recorded input signal (X) and a chirp reference signal (CR) by means of a correlator (30); c. calculating a magnitude (XB) of the input signal (X) from the input signal (X); d. calculating a magnitude (R1B) of the output signal (R1) from the output signal (R1); e. calculating a phase difference (P) between the input signal (X) and the output signal (R1); f. calculating a synthesized interference signal (R2) from the magnitude (XB) of the input signal (X), the magnitude (R1B) of the output signal (R1) and the phase difference (P) by means of a rotator (60); g. calculating a residual signal (DR) as the difference between the output signal (R1) and the synthesized interference signal (R2).
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: March 30, 2021
    Assignee: Robert Bosch GmbH
    Inventor: Wenqing Liu
  • Patent number: 10924248
    Abstract: There are provided a signal-to-noise ratio determining method and device for a receiving end of an information transmission system, and a channel equalization method and device based on a minimum mean square error (MMSE) equalizer. The signal-to-noise ratio determining method and device are based on an information transmission system in which timing synchronization is achieved by using a structure of a repetitive training sequence. The signal-to-noise ratio determining method includes: acquiring a peak and a valley of an autocorrelation function, where the peak represents a sum of a signal average power and a noise average power, and the valley represents the noise average power; and determining a signal-to-noise ratio based on the peak and the valley.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: February 16, 2021
    Inventors: Jibo Wei, Fanglin Gu, Shengchun Huang, Jun Xiong, Qi Tang
  • Patent number: 10917279
    Abstract: A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A PLC device may include a delayed correlation detector and a cross-correlation detector operating in concert to facilitate preamble detection in one implementation.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: February 9, 2021
    Inventors: Mostafa Sayed Ibrahim, Il Han Kim, Tarkesh Pande, Anuj Batra
  • Patent number: 10917877
    Abstract: When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: February 9, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young-Jo Ko, Hyeong-Geun Park, Il-Gyu Kim, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 10917795
    Abstract: Methods, systems, and devices are described for wireless communication at a device. A Long Term Evolution Unlicensed (LTE-U) device may transmit an enhanced preamble that may be understood by Wireless Local Area Network (WLAN) devices, in addition to conveying a characteristic that is detectable by receiving LTE-U devices. The transmitting LTE-U device may generate the enhanced preamble by generating a first training field and a second training field. The characteristic that is detectable by receiving LTE-U devices may be a phase shift between the first and second training fields. Additionally or alternatively, the characteristic may be a sequence or tone mapping of the first or second training field. In some cases, the transmitting LTE-U device may introduce a third training field to the preamble which serves as the characteristic.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: February 9, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Tao Luo, Arumugam Chendamarai Kannan, Bin Tian, Rahul Malik
  • Patent number: 10911194
    Abstract: A receiver for detecting and recovering payload data from a received signal comprises a radio frequency demodulation circuit, a detector circuit and a demodulator circuit. The radio frequency demodulation circuit detects the received signal. The received signal carries the payload data as OFDM symbols in one or more of a plurality of time divided frames, each frame including a bootstrap signal, a preamble signal and a plurality of sub-frames. The demodulator circuit detects bootstrap OFDM symbols to identify communications parameters for detecting the fixed length signalling data, detects the fixed length signalling data to identify the communications parameters for detecting the variable length signalling data, detects the variable length signalling data, and uses the fixed and variable length signalling data to detect the payload data.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: February 2, 2021
    Assignee: Saturn Licensing LLC
    Inventor: Samuel Asangbeng Atungsiri
  • Patent number: 10879983
    Abstract: Multiple antennas of a beamformer may simultaneously transmit wireless signals at different frequencies. The signals may comprise synchronized, identical wireless commands, each at a different carrier frequency. The transmitted signals may constructively and destructively interfere with each other at a receiver antenna, to form a beat signal. When the transmitted signals constructively interfere, the beat signal may cause a voltage in the receiver to exceed a threshold voltage. The threshold voltage may be a minimum voltage at which a device, which is operatively connected to the receiver antenna, is able to perform energy harvesting or wireless communication. The beamformer may operate under blind channel conditions, because the transmitted frequencies may be selected in such a way as to maximize peak power delivered under all possible channel conditions. The beamformer may deliver wireless power to a sensor or actuator that is located deep inside bodily tissue.
    Type: Grant
    Filed: May 17, 2020
    Date of Patent: December 29, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Yunfei Ma, Zhihong Luo, Christoph Steiger, Carlo Giovanni Traverso, Fadel Adib
  • Patent number: 10869652
    Abstract: The disclosed technology relates to imaging catheters. A method is provided that includes: receiving, from a plurality of transducers disposed on a catheter probe, a corresponding plurality of analog signals; selectively sampling the plurality of analog signals; multiplexing to produce a sequence of samples; and transmitting the sequence of samples to a receiver circuit. The receiver circuit includes a clock; an analog to digital converter (ADC) in communication with the clock; and a sampling phase correction circuit in communication with the clock and the ADC. The method further includes: determining optimum sampling times based on measured signal delays associated with the system; adjusting a phase of the clock based on the measured signal delays; and communicating the phase-adjusted clock to the transmitter circuit for the selective sampling of the analog signals. Certain embodiments of the disclosed technology may further be utilized in conjunction with beamforming.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: December 22, 2020
    Assignees: Georgia Tech Research Corporation, University of Leeds
    Inventors: Thomas Carpenter, M. Wasequr Rashid, F. Levent Degertekin, Steven Freear, David Matthew Joseph Cowell
  • Patent number: 10863459
    Abstract: User equipment (UE) provides machine type communications (MTC) through a narrowband (NB)-long term evolution (LTE) system having a downlink transmission bandwidth in a range from about 180 kilohertz (kHz) to about 200 kHz. Receive circuitry is configured to receive, through a downlink transmission of an evolved node B (eNB) in the NB-LTE system, an NB-physical synchronization channel (NB-PSCH), the NB-PSCH including a synchronization signal and having a channel structure, the synchronization signal including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the channel structure defined by multiple subcarriers mutually spaced apart by about 15 kHz and located entirely within the downlink transmission bandwidth. Control circuitry configured to decode the synchronization signal.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: December 8, 2020
    Assignee: APPLE INC.
    Inventors: Tao Wu, Debdeep Chatterjee, Gang Xiong, Mohammad Mamunur Rashid
  • Patent number: 10862650
    Abstract: Disclosed is an uplink communication method for: receiving data through an mmWave downlink from an mmWave base station; transmitting, to the mmWave base station, an ACK/NACK reply to the data and an mmWave uplink reference signal through an mmWave uplink; receiving, from the mmWave base station, an indicator indicating use of a legacy uplink instead of the mmWave uplink; shortening the length of a legacy TTI to correspond to the length of an mmWave TTI according to the indicator; and communicating with the mmWave base station through the legacy uplink using the shortened legacy TTI.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: December 8, 2020
    Inventors: Kukheon Choi, Hyunsoo Ko, Sangrim Lee, Hojae Lee
  • Patent number: RE48478
    Abstract: In a wireless mobile communications system, a method of transmitting and receiving radio access information that allows a faster and an efficient way of establishing a radio connection between a terminal and a target base station while performing a handover for the terminal to a cell of the target base station. The network transmits in advance, the radio access information and the like, to the terminal so that the terminal can be connected with the target cell in a faster manner which minimizes the total time for the handover process.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: March 16, 2021
    Inventors: Sung Jun Park, Young Dae Lee, Sung Duck Chun, Myung Cheul Jung