公开(公告)号：US06621332B2

公开(公告)日：2003-09-16

申请号：US10046162

申请日：2002-01-16

Applicant: Kiyoshi Nakakimura

Inventor： Kiyoshi Nakakimura

IPC: H03D300

CPC classification number: H04L27/233

Abstract: An angular difference detector detects an angular variation according to respective signs of current xy coordinate values supplied from an FFT calculation unit and respective signs of preceding xy coordinate values. An angle calculation unit calculates an angle value of a frequency component according to respective absolute values of xy coordinate values supplied from the FFT calculation unit. Another angular difference detector classifies a difference between a current angle value and a preceding angle value supplied from a subtractor as one of a plurality of angle regions to detect an angular difference. A demapper performs demapping according to a sum of the angular variation supplied from the angular difference detector and the angular difference supplied from that another angular difference detector.

公开(公告)号：US06603819B1

公开(公告)日：2003-08-05

申请号：US09512938

申请日：2000-02-25

Applicant: Michael H. Myers

Inventor： Michael H. Myers

IPC: H04L2722

CPC classification number: H04L27/233 ,  H04L2027/003 ,  H04L2027/0036 ,  H04L2027/0046 ,  H04L2027/0065 ,  H04L2027/0095

Abstract: A radio receiver (10) processes a carrier signal having a Doppler shifted frequency and carrying a coded signal having variable phase and amplitude. The coded signal is divided into a preamble portion and a message portion. A memory (23) stores samples of the coded signal representing at least some of the predetermined symbols of the preamble. A logic unit (16) divides the stored samples into a plurality of sample groups and identifies one sample group having the minimum variation of envelope amplitude. That sample group is used to provide additional samples by which the Doppler shift of the carrier frequency is estimated (70). The coded signal is delayed by a delay operation (100) and has its Doppler shift reduced. The Doppler reduced coded signal is processed by a filter operation (120) and a demodulator (130).

Abstract translation: 无线电接收机（10）处理具有多普勒频移的载波信号并携带具有可变相位和幅度的编码信号。 编码信号被分成前导部分和消息部分。 存储器（23）存储表示前导码的预定符号中的至少一些的编码信号的样本。 逻辑单元（16）将存储的样本分成多个样本组，并且识别具有最小包络幅度变化的一个样本组。 该采样组用于提供附加样本，通过该样本估计载波频率的多普勒频移（70）。 编码信号被延迟一个延迟操作（100）并且其多普勒频移减小。 多普勒减小编码信号由滤波器操作（120）和解调器（130）处理。

公开(公告)号：US6052571A

公开(公告)日：2000-04-18

申请号：US969253

申请日：1997-11-13

Applicant: Akira Mishima ,  Shigeharu Sumi ,  Motoyoshi Kitagawa

Inventor： Akira Mishima ,  Shigeharu Sumi ,  Motoyoshi Kitagawa

IPC: H01F21/02 ,  H01F21/04 ,  H01F41/04 ,  H03B5/18 ,  H03J1/00 ,  H03J1/14 ,  H03J3/00 ,  H03J7/06 ,  H03L7/099 ,  H03L7/18 ,  H04L27/152 ,  H04L27/227 ,  H04L27/233 ,  H03J3/28 ,  H03J5/02 ,  H03L7/08 ,  H04L27/22

CPC classification number: H03L7/0805 ,  H01F21/02 ,  H01F21/04 ,  H01F41/045 ,  H03B5/1841 ,  H03J1/0041 ,  H03J1/005 ,  H03J1/14 ,  H03J3/00 ,  H03J7/065 ,  H03L7/099 ,  H03L7/18 ,  H04L27/152 ,  H04L27/227 ,  H04L27/233

Abstract: A high frequency apparatus for receiving digitally modulated high frequency signals withstands vibration and has a simple tuning adjustment. The apparatus has an input terminal, a mixer which mixes the input signals and an output signal from a local oscillator, a voltage controlled oscillator which includes the local oscillator, an oscillating section, a movable conductive member and, a gluing agent for maintaining an adjusted state, and a control loop having a high loop band width which is large enough so that noise of the local oscillator is not dominated by noise of the voltage controlled oscillator.

Abstract translation: 一种用于接收经数字调制的高频信号经受振动并具有简单的调谐调节的高频装置。 该装置具有输入端子，混合输入信号和来自本地振荡器的输出信号的混频器，包括本地振荡器的压控振荡器，振荡部分，可移动导电部件和用于保持调节的粘合剂 状态和具有足够大的高环路带宽的控制环路，使得本地振荡器的噪声不受压控振荡器的噪声的支配。

公开(公告)号：US5878090A

公开(公告)日：1999-03-02

申请号：US10322

申请日：1998-01-21

Applicant: Donald R. Stephens

Inventor： Donald R. Stephens

IPC: H03J7/02 ,  H04L7/04 ,  H04L27/227 ,  H04L27/233 ,  H04D3/24

CPC classification number: H04L27/2272 ,  H03J7/02 ,  H04L27/233 ,  H04L7/041

Abstract: A receiver carrier synchronization apparatus and method for carrier synchronization with a received signal having a known data pattern preamble uses a "punctured" preamble for making carrier synchronization estimates thereby reducing the number of receivers required. The known data pattern preamble of the received signal is processed with a local reference signal and a differentiated replica of the known data pattern preamble to generate an error signal. The error signal is selectively sampled in the time domain in accordance with a puncture scheme, and the sampled error signal is used to generate the local reference signal in a closed loop. The received signal is processed with the local reference signal and a replica of the known data pattern preamble to generate a synchronization estimate signal.

Abstract translation: 用于与具有已知数据模式前导码的接收信号进行载波同步的接收机载波同步装置和方法使用“穿孔”前导码进行载波同步估计，从而减少所需接收机的数量。 接收信号的已知数据模式前同步码用本地参考信号和已知数据模式前同步码的差分副本进行处理，以产生误差信号。 根据穿孔方案在时域中选择性地采样误差信号，采样误差信号用于在闭环中产生局部参考信号。 接收到的信号用本地参考信号和已知数据模式前同步码的副本进行处理，以产生同步估计信号。

公开(公告)号：US5615230A

公开(公告)日：1997-03-25

申请号：US392505

申请日：1995-02-23

Applicant: Christoph Gunther ,  Joachim Habermann

Inventor： Christoph Gunther ,  Joachim Habermann

IPC: H04L27/233 ,  H04L27/18

CPC classification number: H04L27/2082 ,  H04L27/233

Abstract: A process for transmitting digital signals, in which the digital data are coded differentially in symbols of a symbol period T.sub.s (2.1, 2.2), the symbols transmitted with the Q component being delayed by T.sub.s /2, relative to those of the I component, to achieve a time-staggering. A cross interference of the I and Q components, occurring on the receiver end and caused by the differential coding nd the time staggering, is resolved with a trellis decoder (10), for example. As a result, a differential offset QPSK process achieved on this basis combines the advantages of DQPSK and OQPSK procedures.

Abstract translation: 一种用于发送数字信号的过程，其中数字数据以符号周期Ts（2.1,2.2）的符号进行差分编码，相对于I分量的Q分量被延迟Ts / 2传输的符号， 实现时间惊人。 例如，通过网格解码器（10）解决出现在接收机端并由差分编码和时间交错引起的I和Q分量的交叉干扰。 结果，在此基础上实现的差分偏移QPSK处理结合了DQPSK和OQPSK过程的优点。

公开(公告)号：US4138644A

公开(公告)日：1979-02-06

申请号：US853791

申请日：1977-11-21

Applicant: Dominique N. Godard ,  Andrzej T. Milewski

Inventor： Dominique N. Godard ,  Andrzej T. Milewski

IPC: H04L27/22 ,  H04L27/233

CPC classification number: H04L27/233

Abstract: An adaptive phase detection method and apparatus is described which provides an estimated value .phi..sub.n of the phase .phi..sub.n transmitted at a signalling instant nT in a data transmission system using a M-phase PSK modulation technique. The system compensates for the effects of the intersymbol interference created by not more than one leading lobe of a succeeding signal and an arbitrary number of trailing lobes of preceding signals caused by the impulse response of the transmission channel. The method of the present invention mainly comprises the steps of:Determining at least two residual errors, each of which is obtained by subtracting from the phase .psi..sub.n received at signalling instant nT the sum of one of the possible values which can be taken on by the transmitted signal at each signalling instant, i.e., one of the phases of the constellation, and the estimated value of the phase error due to the intersymbol interference corresponding to that phase of the constellation,Comparing the residual errors thus obtained with each other,Selecting the phase .phi..sub.n which yields the smaller of the residual errors as the most probable transmitted phase .phi..sub.n of the constellation, andSelectively adjusting the estimated phase errors in accordance with the residual errors.

Abstract translation: 描述了一种自适应相位检测方法和装置，其提供在使用M相PSK调制技术的数据传输系统中在信令时刻nT发送的相位phi的估计值。 该系统补偿由传输信道的脉冲响应引起的先前信号的后续信号和任意数量的后续波瓣的不超过一个的引导波瓣产生的符号间干扰的影响。 本发明的方法主要包括以下步骤：

公开(公告)号：US3863078A

公开(公告)日：1975-01-28

申请号：US34100273

申请日：1973-03-14

Applicant: IBM

Inventor： ZAPPE HANS H

IPC: G11C11/44 ,  H01L39/22 ,  H03K3/38 ,  H03K19/162 ,  H03K19/195 ,  H04L27/20 ,  H04L27/233 ,  H03K17/56

CPC classification number: H03K19/1952 ,  G11C11/44 ,  H01L39/223 ,  H03K3/38 ,  H04L27/2053 ,  H04L27/206 ,  H04L27/233 ,  Y10S505/856

Abstract: Josephson tunneling devices are used as parametrons in circuits for logic and memory. Parametron circuits are used as input devices to conventional pulsed Josephson tunneling device circuitry, and as output devices from pulsed Josephson tunneling device circuitry. Therefore, transfers from phase information to pulse information and from pulse information to phase information are obtained. Interconnection between superconducting circuit chips is achieved using Josephson tunneling parametrons and Josephson tunneling detectors. Another interconnection scheme uses capacitive coupling between superconducting circuit chips without physical interconnections therebetween, and employs Josephson tunneling devices on separate chips for the receiving and sending circuitry.

Abstract translation: 约瑟夫森隧道器件用作逻辑和存储器电路中的参数。 参数电路用作常规脉冲约瑟夫逊隧道装置电路的输入装置，以及来自脉冲约瑟夫逊隧道装置电路的输出装置。 因此，获得从相位信息到脉冲信息以及从脉冲信息到相位信息的转移。 使用约瑟夫逊隧道参数和约瑟夫逊隧道探测器实现超导电路芯片之间的互连。 另一种互连方案使用超导电路芯片之间的电容耦合，而在它们之间没有物理互连，并且在接收和发送电路的单独芯片上使用约瑟夫逊隧道装置。

公开(公告)号：US3691545A

公开(公告)日：1972-09-12

申请号：US3691545D

申请日：1969-06-23

Applicant: NUCLEAR CHICAGO CORP

Inventor： CLARK GENE E

IPC: G01T1/164 ,  G11B20/14 ,  H04L27/227 ,  H04L27/233 ,  G11B5/02

CPC classification number: G11B20/1419 ,  G01T1/1647 ,  H04L27/2276 ,  H04L27/233

Abstract: System for storing coordinate signals from Anger-type scintillation camera on magnetic tape in a video tape recorder system. An ADC circuit digitizes the coordinate signals and a buffer register stores the digitized signals as a binary digital word. The randomly occurring words are written on the video tape as they occur by transferring each word into a shift register and producing a start data pulse followed by a series of PSK waveforms representing the bits of the word. A parity bit and a series of synchronizing bits are produced until the next data word appears. The data words are recovered in the sequence and timing of their occurrence by replaying the video tape into a simple synchronized demodulation apparatus.

Abstract translation: 用于在磁带录像机系统的磁带上存储Anger型闪烁摄像机的坐标信号的系统。 ADC电路数字化坐标信号，缓冲寄存器将数字化信号存储为二进制数字字。 随机出现的字通过将每个字转移到移位寄存器中而被写入录像带上，并产生开始数据脉冲，随后是表示字的位的一系列PSK波形。 产生奇偶校验位和一系列同步位，直到出现下一个数据字。 通过将录像带重播为简单的同步解调装置，数据字在其发生的顺序和定时中被恢复。

公开(公告)号：US12019098B2

公开(公告)日：2024-06-25

申请号：US16883755

申请日：2020-05-26

Applicant: Tektronix, Inc.

Inventor： Noah Brummer ,  Andy K. Lim ,  Jan P. Peeters Weem

IPC: G01R13/34 ,  G01R13/02 ,  H04L27/233

CPC classification number: G01R13/345 ,  G01R13/0272 ,  H04L27/233

Abstract: An equivalent-time sampling test and measurement instrument for acquiring a repeating pattern signal under test at or near a maximum sampling speed of the test and measurement instrument. The test and measurement instrument includes a first input configured to receive repeating pattern information about a signal under test, a second input configured to receive the signal under test, one or more processors configured to determine an optimized trigger holdoff period that is set based on a minimum trigger holdoff period of a test and measurement instrument, and an acquisition unit configured to acquire a portion of the signal under test every optimized trigger holdoff period.

公开(公告)号：US12003277B2

公开(公告)日：2024-06-04

申请号：US17637420

申请日：2019-08-20

Applicant: LG ELECTRONICS INC.

Inventor： Sangrim Lee ,  Byounghoon Kim ,  Sungjin Kim

IPC: H04B10/556 ,  G06N3/049 ,  H04B10/67 ,  H04L27/233

CPC classification number: H04B10/5561 ,  G06N3/049 ,  H04B10/677 ,  H04L27/233

Abstract: The present disclosure relates to a method for transmitting or receiving a signal by a reception device in a wireless communication system, and the method may comprise the steps of: receiving, from a transmission device, a signal modulated on the basis of a differential phase shift keying (DPSK) scheme; converting the received signal into an input signal of a spiking neural network (SNN); calculating an output value through the spiking neural network previously learned; and converting the output value into an input signal of a channel decoder.