专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 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.

2. 发明申请

US20170201400A1 SPREADING TECHNIQUES FOR FREQUENCY-SHIFT KEYING MODULATION 有权
公开(公告)号：US20170201400A1
公开(公告)日：2017-07-13
申请号：US15264967
申请日：2016-09-14
申请人： QUALCOMM Incorporated
发明人： Seyong PARK , Wei ZENG , Joseph Binamira SORIAGA , Jay Kumar SUNDARARAJAN , Tingfang JI
IPC分类号： H04L27/10 , H04L27/18 , H04L27/34
CPC分类号： H04L27/10 , H04B1/707 , H04L5/0021 , H04L5/0026 , H04L27/0012 , H04L27/106 , H04L27/14 , H04L27/18 , H04L27/30 , H04L27/34 , H04W88/02
摘要： Various aspects described herein relate to distinguishing frequency shift keying (FSK) signals transmitted by each user of multiple users in a wireless communications system. One or more symbols for transmitting in an FSK-modulated signal can be obtained by a user. The one or more symbols can be encoded based on a tone location assignment corresponding to a unique spreading code associated with the user. Quadrature amplitude modulation (QAM) and/or phase-shift keying (PSK) can be performed over at least one tone associated with the encoded symbols. Each user can transmit the encoded symbols to a receiving entity, where the receiving entity can decode each symbol received from the plurality of users to produce a distinguishable symbol for each user based on the unique spreading codes associated with each user.

3. 发明申请

US20160198362A1 SYSTEM AND METHODS FOR A MESH NETWORK UTILIZING SMART ANTENNAS 审中-公开
标题翻译：使用智能天线的网络的系统和方法
公开(公告)号：US20160198362A1
公开(公告)日：2016-07-07
申请号：US14989680
申请日：2016-01-06
申请人： Thomas Freeburg
发明人： Thomas Freeburg
IPC分类号： H04W28/04 , H04W72/08 , H04L27/10 , H01Q21/00 , H04W72/10 , H04W24/08 , H04B17/318 , H01Q3/00 , H04W24/02 , H04W16/28
CPC分类号： H04B17/318 , H04B7/0689 , H04J11/0023 , H04L1/00 , H04L27/106 , H04W16/28 , H04W24/02
摘要： A data transmission system, comprising a first node in a wireless communications network, the node comprising a radio frequency communications system having high resistance to interference. The radio frequency communications system is configured to measure an interference potential of a second node in the wireless communications network and arrange a priority and timing structure that maximizes reuse of available frequencies. The radio frequency communications system is also configured to encode and decode data and network control signals using a multi-level frequency shift keying modulation scheme. The node also comprising a directional and steerable antenna system, wherein the directional and steerable antenna system is capable of forming a radio frequency transmission into a beam directed to a desired target and transmitting a radiating omni-directional radio frequency transmission.
摘要翻译：一种数据传输系统，包括无线通信网络中的第一节点，所述节点包括具有高抗干扰能力的射频通信系统。无线电频率通信系统被配置为测量无线通信网络中的第二节点的干扰电位，并且布置使可用频率的重用最大化的优先级和定时结构。射频通信系统还被配置为使用多级频移键控调制方案对数据和网络控制信号进行编码和解码。所述节点还包括定向和可操纵的天线系统，其中所述定向和可操纵的天线系统能够将射频传输形成到指向期望目标的波束中，并且发射辐射全向射频传输。

4. 发明申请

US20160191214A1 METHOD AND APPARATUS FOR ESTIMATING CHANNEL INFORMATION 有权
标题翻译：估计渠道信息的方法和装置
公开(公告)号：US20160191214A1
公开(公告)日：2016-06-30
申请号：US14912063
申请日：2014-08-14
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Sungnam Hong , Min Sagong , Chiwoo Lim , Kyungwhoon Cheun
IPC分类号： H04L5/00 , H04L27/26 , H04L27/10 , H04L27/34 , H04W24/10 , H04L25/02
CPC分类号： H04L5/001 , H04B17/345 , H04L5/0007 , H04L25/00 , H04L25/0204 , H04L25/067 , H04L27/0008 , H04L27/106 , H04L27/2691 , H04L27/34 , H04W24/10
摘要： Disclosed are a method and an apparatus for estimating channel information. A terminal estimates a channel coefficient for each of subcarriers included in each symbol of the received signals, calculates power of the received signal matched to each of the subcarriers, calculates an interference estimation parameter for each of the subcarriers based on the power of the received signal matched to each of the subcarriers and based on power of a channel coefficient for a subcarrier on which the received signal has maximum power among the subcarriers, and calculates a non-Gaussian characteristic parameter of an interference signal related to the received signals based on the interference estimation parameters calculated for the subcarriers of all the symbols of the received signals.
摘要翻译：公开了一种用于估计信道信息的方法和装置。终端估计接收信号的每个符号中包括的每个子载波的信道系数，计算与每个子载波匹配的接收信号的功率，基于接收信号的功率计算每个子载波的干扰估计参数与每个子载波相匹配，并且基于接收信号在子载波中具有最大功率的子载波的信道系数的功率，并且基于干扰计算与接收信号相关的干扰信号的非高斯特性参数针对接收信号的所有符号的子载波计算的估计参数。

5. 发明授权

US09246669B2 Apparatus and method for modular signal acquisition and detection 有权
标题翻译：模块化信号采集和检测的装置和方法
公开(公告)号：US09246669B2
公开(公告)日：2016-01-26
申请号：US14285415
申请日：2014-05-22
申请人： Analog Devices Technology
发明人： Muhammad Kalimuddin Khan , Philip E. Quinlan , Kenneth J. Mulvaney
IPC分类号： H04L27/10 , H04L7/033
CPC分类号： H04L7/033 , H04L7/0083 , H04L7/046 , H04L7/10 , H04L27/0008 , H04L27/10 , H04L27/106
摘要： Apparatus and method for acquiring and tracking a data signal are disclosed. Two different CDR circuits are configured to acquire and track data based on two different modulation schemes. While in the acquisition mode, the first CDR circuit may acquire data signal by sampling the signal at a reduced clock rate and handover to the second CDR circuit when a preamble is found. Also in the acquisition mode, the data acquisition and tracking circuit may determine the power level of the preamble signal and dynamically adjust the threshold level for the tracking period upon finding of the preamble.
摘要翻译：公开了用于获取和跟踪数据信号的装置和方法。两个不同的CDR电路被配置为基于两种不同的调制方案来获取和跟踪数据。在采集模式中，第一CDR电路可以通过以降低的时钟速率对信号进行采样来获得数据信号，并且当发现前导码时切换到第二CDR电路。同样在采集模式中，数据采集和跟踪电路可以确定前导码信号的功率电平，并且在寻找前导码时动态地调整跟踪周期的阈值电平。

6. 发明申请

US20140105312A1 DATA DURING ANALOG AUDIO 有权
标题翻译：模拟音频下的数据
公开(公告)号：US20140105312A1
公开(公告)日：2014-04-17
申请号：US14049387
申请日：2013-10-09
申请人： FAIRCHILD SEMICONDUCTOR CORPORATION
发明人： Christopher A. Bennett , Gregory A. Maher , Brewster Porcella
IPC分类号： H04L27/12
CPC分类号： H04L27/12 , H04L25/08 , H04L27/106 , H04L27/28 , H04M11/06 , H04M11/066
摘要： This application discusses among other things, apparatus and method for transmitting data with an analog signal without significantly distorting the analog signal. In an example, an apparatus can include an audio channel, a capacitor coupled to a first conductor of the audio channel, the capacitor configured to couple an analog representation of a digital data signal with an analog audio signal on the audio channel, and a frequency modulator configured to receive the digital data signal and to modulate a frequency of an output signal of the frequency modulator based on a logic level of the digital data signal, wherein the analog representation of the digital data signal includes the frequency of the output signal of the frequency modulator.
摘要翻译：本申请还讨论了用模拟信号发送数据的装置和方法，而不会使模拟信号明显失真。在一个示例中，设备可以包括音频通道，耦合到音频通道的第一导体的电容器，被配置为将数字数据信号的模拟表示与音频通道上的模拟音频信号耦合的电容器，以及频率调制器，被配置为基于所述数字数据信号的逻辑电平接收所述数字数据信号并调制所述频率调制器的输出信号的频率，其中所述数字数据信号的模拟表示包括所述数字数据信号的输出信号的频率频率调制器。

7. 发明授权

US5311554A Synchronized offset extraction in a data receiver 失效
标题翻译：数据接收器中的同步偏移提取
公开(公告)号：US5311554A
公开(公告)日：1994-05-10
申请号：US907965
申请日：1992-07-02
申请人： Daniel A. Morera , David R. Petreye
发明人： Daniel A. Morera , David R. Petreye
IPC分类号： G08B5/22 , H04L25/06 , H04W88/02 , H03K9/00 , H04L27/06 , H04L
CPC分类号： H04W88/026 , G08B5/227 , H04L25/062 , H04L25/066 , H04L27/106
摘要： A selective call receiver (106) receives a radio frequency signal having digital signals contained within symbols. The signal demodulated by the receiver (804) comprises a substantially constant DC offset voltage and an AC voltage (1810) indicative of the information contained within the symbols. A threshold level extraction circuit (808) which extracts the offset voltage is synchronously controlled (1840) providing for sampling of the received signal by the threshold level extraction circuit in substantially the center of each symbol.
摘要翻译：选呼接收机（106）接收具有包含在符号内的数字信号的射频信号。由接收器（804）解调的信号包括基本恒定的DC偏移电压和指示包含在符号内的信息的AC电压（1810）。提取偏移电压的阈值电平提取电路（808）被同步控制（1840），提供阈值电平提取电路在每个符号的大致中心处对接收信号的采样。

8. 发明授权

US5016260A Modulator and transmitter 失效
标题翻译：调制器和发射机
公开(公告)号：US5016260A
公开(公告)日：1991-05-14
申请号：US374248
申请日：1989-06-30
申请人： Youichi Masuda
发明人： Youichi Masuda
IPC分类号： H03K17/62 , H04L27/12
CPC分类号： H04L27/12 , H03K17/6264 , H04L27/106
摘要： A modulator includes a plurality of piezoelectric resonators, a plurality of oscillator circuits, arranged in a one-to-one correspondence with the plurality of piezoelectric resonators, for generating different frequency signals in correspondence with corresponding piezoelectric resonators, and a switching circuit for selecting a predetermined frequency signal from the plurality of different frequency signals on the basis of a value of a digital signal to be modulated, and for outputting the selected frequency signal as a modulation signal.
摘要翻译：调制器包括多个压电谐振器，多个振荡器电路，与多个压电谐振器一一对应配置，用于产生与对应的压电谐振器相对应的不同频率信号;以及切换电路，用于选择根据要调制的数字信号的值，从多个不同频率信号输出预定的频率信号，并输出所选择的频率信号作为调制信号。

9. 发明授权

US11728897B2 Apparatus and method for optical wireless communication based on color M-ary frequency shift keying 有权
公开(公告)号：US11728897B2
公开(公告)日：2023-08-15
申请号：US17549779
申请日：2021-12-13
申请人： Kookmin University Industry Academy Cooperation Foundation
发明人： Yeong Min Jang , Ngoc Huy Nguyen
IPC分类号： H04B10/50 , H04B10/556 , H04L27/12 , H04L27/10 , H04B10/116 , H04B10/11
CPC分类号： H04B10/5563 , H04B10/116 , H04B10/502 , H04L27/106 , H04L27/12 , H04B10/11 , H04B10/50 , H04B10/556
摘要： An optical signal transmission method according to an embodiment of the disclosure is an optical signal transmission method in which a processor performs at least part of each operation, and may include an operation of receiving a data stream, an operation of separating at least part of the data stream into three channels, modulating the separated data streams respectively according to M-ary frequency shift keying (M-FSK) scheme so as to produce an FSK modulated signal, an operation of combining a plurality of FSK modulated signals modulated respectively in the three channels, and producing a color modulated signal according to a bit-color mapping table set in advance, and an operation of transmitting the color modulated signal by controlling a light source of the same optical channel based on the color modulated signal.

10. 发明公开

US20230179456A1 COSTAS SEQUENCE TIME-FREQUENCY SYNCHRONIZATION METHOD BASED ON ALL-PHASE SPECTRUM CORRECTION 审中-公开
公开(公告)号：US20230179456A1
公开(公告)日：2023-06-08
申请号：US17919769
申请日：2021-02-02
申请人： CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
发明人： Guojun LI , Jinghui LI , Changrong YE , Huan MA , Guangfa ZHENG , Yiping LUO , Zunli WANG
IPC分类号： H04L27/00 , H04L27/10 , H04L7/00
CPC分类号： H04L27/0014 , H04L27/106 , H04L7/0054
摘要： The present invention relates to the field of digital signal processing, and in particular to a Costas sequence time-frequency joint synchronization method based on all-phase spectrum correction. The method improves the defects existing in a discrete frequency spectrum correction algorithm using short-time Fourier transform and sliding correlation. The improvement mainly comprises: the present disclosure provides a solution based on iterative optimization: when an actual frequency offset is an integral multiple of the spectral resolution, a large error can occur, frequency offset correction and time delay correction are carried out on a signal by using an estimated value having a large estimated error, then estimation is carried out again, and the frequency offset of the signal is not a special value by means of an iteration mode.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式