公开(公告)号：US09967120B2

公开(公告)日：2018-05-08

申请号：US15522814

申请日：2015-10-29

Applicant: Benjamin P. Wilkerson

Inventor： Benjamin P. Wilkerson

IPC: H04L27/233

CPC classification number: H04L27/233 ,  H04L27/2331 ,  H04L27/2334

Abstract: A BPSK demodulator circuit comprises: a sideband-separating and lower sideband signal-delaying unit which separates a modulated signal into a lower sideband and an upper sideband by a primary low pass filter and a primary high pass filter having a cut-off frequency as a carrier frequency, and which outputs an upper sideband analog signal and an analog signal delayed by ¼ of a cycle of the carrier frequency from a lower sideband analog signal; a data demodulating unit which demodulates digital data by means of latching, through a hysteresis circuit, an analog pulse signal appearing in accordance with the phase change part of a signal generated by the sum of the analog signals; and a data clock restoring unit which generates a data clock by using a data signal and a signal having the delayed lower sideband analog signal digitized through a comparator.

公开(公告)号：US20180123834A1

公开(公告)日：2018-05-03

申请号：US15565575

申请日：2016-04-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeongsam KIM ,  Youngkwan CHOI ,  Hayoung YANG ,  Joohyun LEE

IPC: H04L25/02 ,  H04L25/03 ,  H04B1/709 ,  H04L27/227 ,  H04L27/233

CPC classification number: H04L25/0222 ,  H04B1/709 ,  H04B2001/70935 ,  H04L1/0079 ,  H04L25/02 ,  H04L25/03 ,  H04L27/01 ,  H04L27/227 ,  H04L27/2278 ,  H04L27/233 ,  H04L27/2334

Abstract: The present invention relates to a device and a method for detecting a transmission signal in a wireless communication system, and a reception device in a wireless communication system comprises: a transceiver for receiving a signal from a transmitting end; a first correlator for performing a first correlation and outputting a real part among the results of the first correlation; a second correlator for performing a second correlation and outputting an imaginary part among the results of the second correlation; and a control unit for controlling the first correlator and the second correlator on the basis of a channel change rate so as to detect a transmission signal.

公开(公告)号：US20170288922A1

公开(公告)日：2017-10-05

申请号：US15269852

申请日：2016-09-19

Applicant: QUALCOMM Incorporated

Inventor： Koorosh Akhavan ,  Eunmo Kang ,  Rajapaksa Senaratne

IPC: H04L27/20 ,  H04L27/34 ,  H04L27/26

CPC classification number: H04L27/2017 ,  H04L27/0014 ,  H04L27/2003 ,  H04L27/233 ,  H04L27/2688 ,  H04L27/34 ,  H04L2027/0026 ,  H04L2027/0051

Abstract: In one aspect, a method for estimating residual carrier frequency offset (CFO) in a phase-modulated wireless signal having pseudo noise (PN) spreading is provided. The method includes receiving, at a digital transceiver, a plurality of PN spread blocks of in-phase and quadrature (I/Q) samples of the phase-modulated wireless signal and performing sample-level de-rotation, symbol-level de-spreading, and sign alignment. The method also includes estimating a phase difference and determining an estimated residual CFO based on the phase difference.

公开(公告)号：US09729362B1

公开(公告)日：2017-08-08

申请号：US14221246

申请日：2014-03-20

Applicant: Georgia Tech Research Corporation

Inventor： Stephen Ralph ,  Kedar Mehta ,  Pierre Isautier ,  Andrew Stark

IPC: H04L27/00 ,  H04J14/06 ,  H04B10/61 ,  H04L7/00

CPC classification number: H04B10/616 ,  H04B10/6161 ,  H04B10/6164 ,  H04B10/6165 ,  H04B10/695 ,  H04B17/0097 ,  H04J14/06 ,  H04L27/0008 ,  H04L27/0014 ,  H04L27/233

Abstract: Systems and methods for autonomous signal modulation format identification are disclosed. In an example embodiment of the disclosed technology, a method includes applying higher-order statistics to an input signal to identify the input signal's modulation format. The method may include applying higher-order statistics to the input signal to calculate higher-order cumulant values for the input signal as higher-order cumulants are indicative of a particular modulation format signature. The method may further include employing a decision tree to determine the modulation format of the input signal.

公开(公告)号：US09712211B2

公开(公告)日：2017-07-18

申请号：US15204310

申请日：2016-07-07

Applicant: Commissariat A L'Energie Atomique et aux Energies Alternatives

Inventor： Pierre Courouve ,  Jean-Baptiste Dore ,  Manuel Pezzin

IPC: H04L27/22 ,  H04B5/00 ,  H03D3/04 ,  H04L27/233 ,  H04L27/38 ,  H04L27/227

CPC classification number: H04B5/0062 ,  H03D3/007 ,  H03D3/04 ,  H04L27/2272 ,  H04L27/2278 ,  H04L27/233 ,  H04L27/3845

Abstract: A quadrature demodulator not requiring analog mixers. The demodulation is made using a first integrator and a second integrator which are controlled by square logic signals at twice the frequency of the carrier, the received signal being alternatively integrated by the first integrator and the second integrator over periods of time equal to a quarter period of time of the carrier frequency. The samples of the first and second integrators are sampled and subtracted from each other. The successive samples are combined in a first and a second combining module for providing in-phase and quadrature component samples. This demodulator can further be provided with a synchronization module IQ and a symbol synchronization module.

公开(公告)号：US20170187562A1

公开(公告)日：2017-06-29

申请号：US14757821

申请日：2015-12-23

Applicant: Intel IP Corporation

Inventor： Lu Lu ,  Jinyong Lee ,  Xuan Steven Li ,  Aiguo Yan

IPC: H04L27/26 ,  H04B17/20 ,  H04W4/00 ,  H04L27/32

CPC classification number: H04L27/2649 ,  H04B17/20 ,  H04L27/16 ,  H04L27/233 ,  H04L27/32 ,  H04L27/3845 ,  H04L2027/0026 ,  H04W4/80

Abstract: A Bluetooth Low Energy (BLE) device, having a demodulator configured to translate in-phase and quadrature components of a received BLE signal into a differential phase signal; an estimator configured to estimate a frequency offset of the differential phase signal; and a detector configured to detect information in the differential phase signal corrected by the estimated frequency offset.

公开(公告)号：US20160323056A1

公开(公告)日：2016-11-03

申请号：US15033400

申请日：2014-10-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chang Soon PARK ,  Young Jun HONG ,  Jinesh P NAIR ,  Joon Seong KANG ,  Young Soo KIM ,  Sujit JOS ,  Manoj CHOUDHARY

IPC: H04J13/16 ,  H04L25/49

CPC classification number: H04J13/16 ,  H04B1/0475 ,  H04B1/7097 ,  H04B2201/70707 ,  H04B2201/709709 ,  H04J13/0011 ,  H04J13/0022 ,  H04J13/0044 ,  H04J13/10 ,  H04J13/107 ,  H04L1/247 ,  H04L25/4923 ,  H04L27/04 ,  H04L27/233 ,  H04L27/2627 ,  H04L27/2692 ,  H04L27/36 ,  H04L27/38

Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements −1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.

Abstract translation: 公开了一种用于发送前置码序列的方法和装置。 根据实施例的发射机可以从包括元素-1,0和1的三进位序列序列中提取非相干接收机的第一序列和相干接收机的第二序列，并将第一序列和第二序列映射到 前导码包括多个位以产生非相干接收机和相干接收机支持的第三序列。

公开(公告)号：US20160218995A1

公开(公告)日：2016-07-28

申请号：US15006822

申请日：2016-01-26

Applicant: Echelon Corporation

Inventor： Walter J. Downey

IPC: H04L12/911 ,  H04J11/00 ,  H04B3/54 ,  H04L27/26 ,  H04L27/22

CPC classification number: H04L47/822 ,  H04B3/542 ,  H04J11/00 ,  H04L1/0039 ,  H04L27/22 ,  H04L27/233 ,  H04L27/2613 ,  H04L27/2649 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2692 ,  H04L2027/0095

Abstract: A method is disclosed for detecting packet at a receiving system in a Multi-Carrier Modulation (MCM) system. The method starts with receiving a signal at the receiving system. Then during the plurality of symbol durations, a set of phases of the signal for each symbol duration is obtained, where each phase is a phase of a carrier of the number of carriers. Then a set of phase variances for each carrier of the number of carriers is obtained, where each phase variance is a difference of phases of a carrier in different symbol durations. Then a phase variance value based on the set of phase variances is computed and it is compared with a threshold to determine whether a packet has been detected from the received signal.

Abstract translation: 公开了一种用于在多载波调制（MCM）系统中的接收系统处检测分组的方法。 该方法从接收系统接收信号开始。 然后在多个符号持续时间期间，获得每个符号持续时间的信号的一组相位，其中每个相位是载波数量的载波的相位。 然后，获得载波数量的每个载波的一组相位方差，其中每个相位方差是不同符号持续时间内载波的相位差。 然后计算基于相位方差集合的相位方差值，并将其与阈值进行比较，以确定是否已经从接收到的信号中检测到分组。

公开(公告)号：US20160217805A1

公开(公告)日：2016-07-28

申请号：US14736289

申请日：2015-06-11

Applicant: Acer Incorporated

Inventor： Po-Jen Tu ,  Jia-Ren Chang ,  Kai-Meng Tzeng

IPC: G10L21/0332 ,  G10L21/01 ,  G10L21/0364 ,  G10L21/013

CPC classification number: H04R25/353 ,  G10L21/0364 ,  G10L2021/0575 ,  H04L27/227 ,  H04L27/233 ,  H04R2225/43

Abstract: A voice signal processing apparatus and a voice signal processing method are provided. Calculate a value of an interpolation parametric function corresponding to a sampling signal frame according to three consecutive sample values in the sampling signal frame, and calculate an interpolated value between two adjacent sampling points in a frequency-lowered signal frame according to the value of the interpolation parametric function.

Abstract translation: 提供语音信号处理装置和语音信号处理方法。 根据采样信号帧中的三个连续采样值，计算与采样信号帧对应的插值参数函数的值，并根据插补值计算降频信号帧中两个相邻采样点之间的内插值 参数函数。

公开(公告)号：US09106346B2

公开(公告)日：2015-08-11

申请号：US14000333

申请日：2012-03-22

Applicant: Andreas Leven ,  Stephan Ten Brink

Inventor： Andreas Leven ,  Stephan Ten Brink

IPC: H04B10/00 ,  H04B10/61 ,  H04L27/233 ,  H04L25/03

CPC classification number: H04B10/6165 ,  H04L25/03178 ,  H04L27/233

Abstract: Proposed is a method of deriving differentially decoded data values from a received differentially encoded phase modulated optical signal. The method uses an estimation algorithm in order to find derive a sequence of differentially decoded data values. The algorithm stipulates transition probabilities between hypothetical first states, representing differentially encoded data symbols assuming that no phase slip has occurred, and transition probabilities towards hypothetical second states, which represent differentially encoded data symbols assuming that a phase slip has occurred. The transition probabilities between the first and second states are weighted on the basis of a predetermined phase slip probability value.

Abstract translation: 提出的是从接收的差分编码相位调制光信号中导出差分解码数据值的方法。 该方法使用估计算法来找到导出差分解码数据值的序列。 该算法规定了假定的第一状态之间的转换概率，其表示假设没有发生相位差的差分编码数据符号，以及假定相位偏移已经发生的表示差分编码数据符号的假设第二状态的转移概率。 基于预定的相位滑动概率值对第一状态和第二状态之间的转移概率进行加权。