公开(公告)号：US10469295B2

公开(公告)日：2019-11-05

申请号：US15798590

申请日：2017-10-31

申请人： Silicon Laboratories Inc.

发明人： John M. Khoury ,  Navin Harwalkar

IPC分类号： H04L27/06 ,  H04B1/00 ,  G01R19/25 ,  G01R23/165 ,  H04B1/04

摘要： In one aspect, an apparatus includes: a mixer to receive a radio frequency (RF) signal and downconvert the RF signal into a second frequency signal; an amplifier coupled to the mixer to amplify the second frequency signal; an image rejection (IR) circuit coupled to the programmable gain amplifier (PGA) to orthogonally correct a gain and a phase of the amplified second frequency signal to output a corrected amplified second frequency signal; and a complex filter to filter the corrected amplified second frequency signal.

公开(公告)号：US20190334623A1

公开(公告)日：2019-10-31

申请号：US16508086

申请日：2019-07-10

申请人： INPHI CORPORATION

发明人： Jamal RIANI ,  Sudeep BHOJA

IPC分类号： H04B10/27 ,  H04L27/06 ,  H04B14/00 ,  H04B10/61 ,  H04L27/34 ,  H04L27/02 ,  H04B10/25 ,  H03K9/02

摘要： The present invention is directed to data communication system and methods. More specifically, various embodiments of the present invention provide a communication interface that is configured to transfer data at high bandwidth using nDSQ format(s) over optical communication networks. In certain embodiments, the communication interface is used by various devices, such as spine switches and leaf switches, within a spine-leaf network architecture, which allows large amount of data to be shared among servers.

公开(公告)号：US10432446B1

公开(公告)日：2019-10-01

申请号：US16122349

申请日：2018-09-05

申请人： NXP USA, INC.

发明人： Andrei Alexandru Enescu ,  Marius Octavian Arvinte

IPC分类号： H04L27/06 ,  H04L27/34 ,  H04L27/38 ,  H04B1/10 ,  H04B7/0413

摘要： A decoder decodes a set of data streams received at a receiver based on a tree search that employs a subset of decoding constellation points. The decoder can form a tree wherein each level of the tree corresponds to one of the set of data streams. Each level of the tree includes a plurality of nodes corresponding to a set of candidate constellation points, wherein the set of candidate constellation points indicating possible values of data received via the set of data streams. For tree levels beyond an initial tree level, the decoder expands each node (that is, calculates the metrics for nodes of the next tree level) for only a subset of candidate constellation points, wherein the subset of candidate constellation points is based on a sign value of the node.

公开(公告)号：US10432318B2

公开(公告)日：2019-10-01

申请号：US16066854

申请日：2017-01-10

申请人： NEC CORPORATION

发明人： Manabu Arikawa ,  Toshiharu Ito

IPC分类号： H04B10/06 ,  H04B10/61 ,  H04B10/112 ,  H04B10/118 ,  H04L27/22 ,  H04L27/06

摘要： In order to increase a compensation range for Doppler shift compensation, this digital signal processing circuit is provided with a Doppler shift compensation unit which, on the basis of a sample sequence signal which is oversampled at N (where N is an integer at least equal to 2) times a symbol rate and includes a central sample corresponding to the timing at a symbol center, and a transition sample corresponding to the timing of a symbol transition, finds a Doppler shift amount included in the sample sequence signal and performs Doppler shift compensation. The Doppler shift compensation unit includes a symbol determining unit which performs a symbol determination with respect to the central sample and a determination with respect to the transition sample. The Doppler shift compensation unit switches between these determinations for each corresponding sample and performs said determinations in order to obtain a phase difference and thereby detect the Doppler shift amount.

公开(公告)号：US20190281548A1

公开(公告)日：2019-09-12

申请号：US16422091

申请日：2019-05-24

申请人： Vinod Kristem ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Po-Kai Huang

发明人： Vinod Kristem ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Po-Kai Huang

IPC分类号： H04W52/02 ,  H04L27/06

摘要： This disclosure describes systems, methods, and devices related to generating a wake up receiver (WUR) transmit waveform. A device may determine one or more symbols bit sequence of a wake up receiver (WUR) frame to be sent to a first station device capable of decoding the bit sequence. The device may determine a first symbol of the one or more symbols, wherein the first symbol is associated with an ON state. The device may determine a second symbol of the one or more symbols, wherein the second symbol is associated with the ON state. The device may generate a first on-off keying (OOK) waveform associated with the first symbol. The device may generate a second OOK waveform associated with the second symbol, wherein the second OOK waveform is different from the first OOK waveform. The device may cause to send the WUR frame to the first station device based on the first OOK waveform and the second OOK waveform.

公开(公告)号：US10367516B2

公开(公告)日：2019-07-30

申请号：US15674985

申请日：2017-08-11

申请人： Analog Devices Global

发明人： Frederick Carnegie Thompson ,  Varun Agrawal ,  Jose Barreiro Silva ,  Declan M. Dalton

IPC分类号： H03L7/16 ,  H03M1/08 ,  H03K5/1252 ,  H03K7/06 ,  H03L7/089 ,  H03M1/06 ,  H03M1/12 ,  H04L27/06 ,  H03M1/74 ,  H03M3/00

摘要： This disclosure relates to data converters for electronic systems. An example system includes a primary analog to digital converter (ADC) circuit, a slope calculation circuit, a digital phase lock loop (DPLL) circuit, a sampling error circuit, and a summing circuit. The primary ADC circuit samples an input signal and produces a digital output signal representative of the input signal. The slope calculation circuit generates a digital slope signal representative of slope of the input signal, and the DPLL circuit provides a sampling clock signal to the primary ADC circuit. The sampling error circuit generates a sampling error signal representative of sampling error by the primary ADC circuit using the digital slope signal and the sampling clock signal. The summing circuit receives the sampling error signal and the digital output signal of the primary ADC circuit and generates an adjusted digital output signal representative of the input signal.

公开(公告)号：US10355841B2

公开(公告)日：2019-07-16

申请号：US15977092

申请日：2018-05-11

申请人： Wi-Fi One, LLC

发明人： Yutaka Murakami ,  Masayuki Orihashi ,  Akihiko Matsuoka

IPC分类号： H04L5/00 ,  H04B7/06 ,  H04L1/06 ,  H04L27/26 ,  H04L27/04 ,  H04L27/12 ,  H04L27/14 ,  H04L27/06 ,  H04L29/06 ,  H04L27/18 ,  H04L25/02 ,  H04W52/52 ,  H04B7/0413 ,  H04B7/08 ,  H04W72/04

摘要： A plurality of modulation signals is generated. Each of the plurality of modulation signals includes a pilot symbol sequence having a plurality of pilot symbols. Each pilot symbol sequence is inserted at a same temporal point in each modulation signal, and each pilot symbol in the pilot symbol sequence has a non-zero amplitude. A quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of modulation signals to be transmitted. The plurality of modulation signals are transmitted in an identical frequency band from a plurality of antennas. Each of the transmitted plurality of modulation signals includes transmission data and one of the pilot symbol sequences.

公开(公告)号：US20190215199A1

公开(公告)日：2019-07-11

申请号：US16353611

申请日：2019-03-14

申请人： Micron Technology, Inc.

发明人： Timothy M. Hollis ,  Feng Lin

IPC分类号： H04L25/49 ,  G06F13/16 ,  G06F13/40 ,  H04L27/04 ,  G06F1/324 ,  H04L27/06

CPC分类号： H04L25/4917 ,  G06F1/324 ,  G06F13/1689 ,  G06F13/4068 ,  H04L27/04 ,  H04L27/06

摘要： Methods, systems, and devices for improving uniformity between levels of a multi-level signal are described. Techniques are provided herein to unify vertical alignment between data transmitted using multi-level signaling. Such multi-level signaling may be configured to capture transmitted data during a single clock cycle of a memory controller. An example of multi-level signaling scheme may be pulse amplitude modulation (PAM). Each unique symbol of the multi-level signal may be configured to represent a plurality of bits of data.

公开(公告)号：US10341071B2

公开(公告)日：2019-07-02

申请号：US15494666

申请日：2017-04-24

申请人： WI-FI ONE, LLC

发明人： Yutaka Murakami ,  Masayuki Orihashi ,  Akihiko Matsuoka

IPC分类号： H04L5/00 ,  H04B7/06 ,  H04W52/52 ,  H04L27/26 ,  H04L25/02 ,  H04L1/06 ,  H04L27/04 ,  H04L27/12 ,  H04L27/14 ,  H04L27/06 ,  H04L29/06 ,  H04L27/18 ,  H04B7/0413 ,  H04B7/08 ,  H04W72/04

摘要： A radio transmission apparatus includes a first antenna, a second antenna, and circuitry configured, based on information associated with an estimated communications channel condition, to generate a single modulation signal or a plurality of modulation signals based on the estimated communications channel condition information, and to (i) transmit the single modulation signal from the first antenna or (ii) transmit the plurality of modulation signals which include different information from each other over an identical frequency band from the first antenna and the second antenna at an identical temporal point. The single modulation signal and the plurality of modulation signals contain parameter information indicating a number of modulation signals transmitted at the same time.

公开(公告)号：US10339798B2

公开(公告)日：2019-07-02

申请号：US15857719

申请日：2017-12-29

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Haodong Liu ,  Chenlong Li ,  Che Xie

IPC分类号： H04R3/08 ,  G05B15/02 ,  G08C23/04 ,  H04B7/212 ,  H04R3/02 ,  H04L27/06 ,  H04N7/14 ,  H04N7/18

摘要： Embodiments of the present disclosure provide an infrared remote control apparatus and a terminal. The infrared remote control apparatus includes an audio codec chip, a transfer switch, and an infrared transmitter. The audio codec chip includes a pair of differential output pins. The infrared transmitter is connected to the differential output pins by using the transfer switch. The audio codec chip is configured to obtain an infrared remote control parameter that includes an envelope length and a carrier frequency of an infrared remote control signal. An infrared remote control signal is generated according to the envelope length and the carrier frequency. When the transfer switch sets up a connection between the infrared transmitter and the differential output pins, the audio code chip is configured to drive, by using the differential output pins, the infrared transmitter to transmit the infrared remote control signal.