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31. 发明授权

US10153928B2 Energy efficient highway addressable remote transducer coherent 8-ary phase shift keying modem 有权
公开(公告)号：US10153928B2
公开(公告)日：2018-12-11
申请号：US15905786
申请日：2018-02-26
申请人： Smart Embedded Systems, Inc.
发明人： Pranatharthi Subbaratnam Haran
IPC分类号： H04L27/10 , H04L27/20
摘要： A method and a highway addressable remote transducer (HART) modem for modulating and demodulating an analog signal including a HART message are provided. With low power consumption, the less computationally intensive HART modem modulates the analog signal using a coherent 8-ary phase shift keying (C8PSK) technique with a predefined gray code lookup table and a pre-generated sample lookup table having phase modulated digital signals indexed by index vectors, and transmits a HART C8PSK analog signal to sensor devices. A C8PSK demodulator in the HART modem demodulates the HART C8PSK analog signal by performing coarse estimation and fine estimation of phase errors and by estimation of a timing offset using a decision estimator. An automatic modulation classifier of the C8PSK demodulator validates presence of the analog signal in a C8PSK protocol by determining signs of in-phase and quadrature phase signals corresponding to each subsequent processed digitized sample of the analog signal.

32. 发明授权

US10136500B2 Isolated driver 有权
公开(公告)号：US10136500B2
公开(公告)日：2018-11-20
申请号：US15562630
申请日：2016-03-23
申请人： PHILIPS LIGHTING HOLDING B.V.
发明人： Tijmen Cornelis Van Bodegraven
IPC分类号： H05B33/08 , H05B37/02 , H04B10/80 , H04L27/10 , H02M1/32 , H02M3/335 , H03K17/691
摘要： The invention describes an isolated driver (2) comprising a converter module (21) realized to provide voltage and current output to a load (3); a feedback arrangement (22) realized to monitor voltage and/or current during operation of the driver (2); and a converter controller (1) for providing converter control signals (CI, CF, VCON) to the converter module (21), and wherein the converter controller (1) comprises a single optocoupler (10) connected by input terminals to the feedback arrangement (22); and a switching circuit arrangement (11) connected to output terminals of the optocoupler (10), comprising a number of semiconductor switches (Q20, Q25, Q30, . . . , Q34) arranged to generate a converter control signal (CI, CF, VCON) for placing the converter module (21) of the driver (2) into a low-output mode (MLO) when a voltage across the optocoupler output terminals indicates a fault condition. The invention further describes an LED lighting arrangement (5) comprising such an isolated driver (2) for driving an LED lighting load (3) from a mains power supply (4). The invention also describes a converter controller (1) for an isolated driver (2), and a method of operating an isolated driver (2).

33. 发明授权

US10103779B2 Adaptive tone power control in PLC networks 有权
公开(公告)号：US10103779B2
公开(公告)日：2018-10-16
申请号：US13644585
申请日：2012-10-04
申请人： Texas Instruments Incorporated
发明人： Il Han Kim , Anand G. Dabak , Tarkesh Pande
IPC分类号： H04L27/10 , H04L27/18 , H04B3/54
摘要： In a powerline communications (PLC) network having a first node and at least a second node on a PLC channel utilizing a band including a plurality of tones, based on at least one channel quality indicator (CQI), the first node allocates for a tone map response payload only a single (1) power control bit for each of a plurality of subbands having two or more tones. The power control bit indicates a first power state or a second power state. The first node transmits a frame including the tone map response payload to the second node. The second node transmits a frame having boosted signal power for the tones in the subbands which have the first power state compared to a lower signal power for the tones in the subbands which have the second power state.

34. 发明申请

US20180287838A1 Modulation for a Wireless Communication Network 审中-公开
公开(公告)号：US20180287838A1
公开(公告)日：2018-10-04
申请号：US15575674
申请日：2015-05-21
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Robert BALDEMAIR , Kumar BALACHANDRAN , Erik DAHLMAN
IPC分类号： H04L27/10 , H04L27/36 , H04L27/38 , H04L27/34
摘要： There is disclosed a method for operating a wireless device in a wireless communication network, the method comprising modulating a plurality of input bits (N), wherein modulating comprises choosing a first number (k) of frequencies from a predetermined set of a total number (NF) of frequencies, the first number (k) being larger than 1, and performing quadrature amplitude modulation to a second number (NQ) on each of the first number (k) of frequencies. There are further disclosed related methods and devices.

35. 发明授权

US10009828B2 User terminal and inter-terminal communication method 有权
公开(公告)号：US10009828B2
公开(公告)日：2018-06-26
申请号：US15032720
申请日：2014-10-16
申请人： NTT DOCOMO, INC.
发明人： Hiroki Harada , Yongbo Zeng , Qun Zhao , Yongsheng Zhang
IPC分类号： H04W40/24 , H04J11/00 , H04L27/10 , H04L27/34 , H04L29/06 , H04L5/00 , H04W72/12 , H04W8/00 , H04W88/06
CPC分类号： H04W40/244 , H04J11/00 , H04J11/0056 , H04L5/0048 , H04L5/005 , H04L27/10 , H04L27/34 , H04L69/22 , H04W8/005 , H04W40/246 , H04W72/1215 , H04W72/1263 , H04W88/06
摘要： The present invention is designed so that, when a plurality of inter-terminal discovery signals with varying numbers of information bits are used in a radio communication system in which inter-terminal communication is carried out, user terminals can be discovered based on the inter-terminal discovery signals. According to the inter-terminal communication method of the present invention, a user terminal (#1) determines the signal format of a discovery signal based on the number of information bits of the discovery signal,transmits the discovery signal based on the signal format, and also transmits signal format information to represent this signal format. A user terminal (#2) receives the signal format information from the user terminal (#1), and, based on the signal format represented by the signal format information, detects the discovery signal.

36. 发明授权

US10009211B1 Radio interference eliminator circuit 有权
公开(公告)号：US10009211B1
公开(公告)日：2018-06-26
申请号：US15289832
申请日：2016-10-10
申请人： Juan Roberto Barrera
发明人： Juan Roberto Barrera
IPC分类号： H04L27/26 , H04L27/10 , H04W40/22
CPC分类号： H04L27/2688 , H04B1/00 , H04B1/12 , H04L27/103
摘要： A circuit is disclosed which eliminates chirp produced within an electronic flow measurement (EFM) system. In an exemplary embodiment, relays are positioned between the EFM Rxd input and the communications device input. One relay is closed while the operate signal reaches its high state, allowing data to pass between the communications device and the EFM Rxd input. When the operate line switches to a low state, the first relay opens disrupting the data path between the communications device and the EFM Rxd input preventing data from bouncing back between the two points. The second relay may close grounding the data signal from the communications device eliminating noise from the line.

37. 发明授权

US09979584B2 Transmission and reception methods implemented in communication devices and associated communication devices 有权
公开(公告)号：US09979584B2
公开(公告)日：2018-05-22
申请号：US15327643
申请日：2014-08-25
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Jianfeng Wang
IPC分类号： H04L27/04 , H04L27/34 , H04L27/10 , H04L1/06 , H04L27/26
CPC分类号： H04L27/34 , H04B7/0669 , H04B7/068 , H04L1/0606 , H04L1/0625 , H04L5/0023 , H04L27/106 , H04L27/2614 , H04L27/2617 , H04L27/32
摘要： The present disclosure provides a transmission method comprising splitting a block of bits to be transmitted into a number of groups each consisting of k+2q bits, wherein k and q are natural numbers and each of the groups includes a subgroup consisting of k bits and two subgroups each consisting of q bits and performing 2q-ary QAM modulation on the subgroups of q bits from the groups of k+2q bits to obtain QAM symbols, respectively. The QAM symbols are processed so that two QAM symbols obtained from the two subgroups of q bits in each of the groups of k+2q bits are mapped onto at least two antennas as consecutive processed symbols. Through the use of 2k-ary FSK modulation, a frequency tone to which the two consecutive processed symbols are allocated is selected according to the subgroup of k bits from each of the groups of k+2q bits before transmission.

38. 发明授权

US09949276B2 Signaling message transmission in a wireless communication network 有权
公开(公告)号：US09949276B2
公开(公告)日：2018-04-17
申请号：US14673738
申请日：2015-03-30
申请人： QUALCOMM Incorporated
发明人： Ravi Palanki , Alexei Gorokhov
IPC分类号： H04W72/08 , H04L5/00 , H04W52/32 , H04W72/04 , H04L27/26 , H04W52/24 , H04W52/28 , H04L27/10 , H04L27/30
CPC分类号： H04W72/082 , H04L5/0007 , H04L5/0053 , H04L5/0091 , H04L27/10 , H04L27/2647 , H04L27/30 , H04W52/243 , H04W52/245 , H04W52/281 , H04W52/32 , H04W72/0426
摘要： Techniques for sending signaling messages in a wireless communication network are described. In an aspect, a signaling message (e.g., a reduce interference request) may be sent by mapping it to at least one specific subcarrier among a set of subcarriers reserved for sending the signaling message. The at least one subcarrier may be selected based on the message value. A signal may be sent on the at least one subcarrier in multiple symbol periods to convey the signaling message. In another aspect, a reduce interference request may be sent based on an orthogonal resource among orthogonal resources available for sending reduce interference requests. In one design, an orthogonal sequence may be selected based on the request and may be spread across a resource segment. In another design, the reduce interference request may be processed to obtain modulation symbols, and each modulation symbol may be spread across multiple subcarriers in one symbol period.

39. 发明授权

US09936499B2 Fast terminal entry in link 16 tactical networks 有权
公开(公告)号：US09936499B2
公开(公告)日：2018-04-03
申请号：US15032163
申请日：2015-08-10
申请人： BAE Systems Information and Electronics Systems Integration Inc.
发明人： John H. Chongoushian , Wayne W. Altrichter
IPC分类号： H04W4/00 , H04W72/04 , H04Q11/04 , H04H20/16 , H04L27/10 , H04L12/64
CPC分类号： H04W72/0446 , H04H20/16 , H04L27/10 , H04L2012/6459 , H04Q11/04
摘要： A process for allowing a Concurrent Multi-Netting (CMN-4) equipped Link 16 terminal to enter an active network. After an initial entry command is entered at the terminal at a given current time at the terminal, a number of time slots are identified in which multiple receivers at the terminal have an opportunity to detect an initial entry message (IEM) after the given current time. Each of the receivers is set to detect an IEM during a different one of the identified time slots. When an IEM is first detected by one of the receivers, the current time at the terminal is reset based on the time slot in which the IEM was detected.

40. 发明授权

US09923573B2 Method and device for reading a serial data stream 有权
公开(公告)号：US09923573B2
公开(公告)日：2018-03-20
申请号：US14953509
申请日：2015-11-30
申请人： DR. JOHANNES HEIDENHAIN GmbH
发明人： Daniel Schenzinger , Stephan Kreuzer
IPC分类号： H04L27/10 , H03M5/12 , G06F13/42
CPC分类号： H03M5/12 , G06F13/4295
摘要： A method for reading a serial data stream in a piece of automation technology equipment includes encoding the data stream to include at least two symbols which are distinguishable by a time interval between two successive signal edges. The data stream is delivered to a read unit including a symbol recognition unit which associates a time sequence of the signal edges with a respective one of the symbols taking into account a period of time including a current symbol duration of one of the symbols to be currently associated and at least one old symbol duration of a preceding one of the symbols.

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