公开(公告)号：US20180287646A1

公开(公告)日：2018-10-04

申请号：US15655676

申请日：2017-07-20

申请人： Innophase, Inc.

发明人： Yang Xu ,  Sara Munoz Hermoso

IPC分类号： H04B1/16 ,  H04W4/00 ,  H04J1/02 ,  H04L27/06 ,  H04L27/22 ,  H04L27/14 ,  H04L27/38

CPC分类号： H04B1/16 ,  H04B14/008 ,  H04J1/02 ,  H04L27/00 ,  H04L27/06 ,  H04L27/14 ,  H04L27/22 ,  H04L27/233 ,  H04L27/38 ,  H04L27/3845 ,  H04W4/80

摘要： Circuitry and methods are described for digital signal demodulation. In a configurable receiver, a method includes receiving a radio frequency signal at the configurable receiver, operating the configurable receiver in a first mode, the first mode including providing the radio frequency signal to an amplitude detection circuit to determine an amplitude, providing the radio frequency signal to a phase detection circuit to determine a phase, and providing the amplitude and phase to a coordinate rotation digital computer (CORDIC) logic circuit, and operating the configurable receiver in a low power mode upon receiving an indication to selectively disable the amplitude detection circuit, the low power mode including providing the radio frequency signal to the phase detection circuit to determine the phase, and providing the phase and a predetermined constant value in lieu of the amplitude to the CORDIC logic circuit.

公开(公告)号：US09942070B2

公开(公告)日：2018-04-10

申请号：US15312148

申请日：2015-06-09

申请人： Nordic Semiconductor ASA

发明人： David Alexandre Engelien-Lopes ,  Sverre Wichlund ,  Eivind Olsen ,  Phil Corbishley ,  Ola Bruset

IPC分类号： H04L27/20 ,  H04B1/7073 ,  H04J13/00 ,  H04J13/10 ,  H04L27/233 ,  H04L27/26 ,  H04L7/00 ,  H04L27/18 ,  H04L27/22 ,  H04L23/02 ,  H04L27/00

CPC分类号： H04L27/2017 ,  H04B1/7073 ,  H04J13/0074 ,  H04J13/10 ,  H04L7/00 ,  H04L23/02 ,  H04L27/18 ,  H04L27/2003 ,  H04L27/22 ,  H04L27/233 ,  H04L27/2659 ,  H04L27/2662 ,  H04L2027/0046 ,  H04L2027/0065

摘要： A radio transmitter (4) comprises an encoder (5) that receives one or more variable message bits, and encodes each message bit that has a first value as a predetermined first binary chip sequence and encodes each message bit that has the opposite value as a predetermined second binary chip sequence. The radio transmitter (4) transmits data packets, each comprising (i) a predetermined synchronization portion, comprising one or more instances of the first binary chip sequence, and (ii) a variable data portion, comprising one or more encoded message bits output by the encoder. A radio receiver (9) receives such data packets. It uses the synchronization portion of a received data packet to perform a frequency and/or timing synchronization operation, and then decodes message bits from the data portion of the data packet.

公开(公告)号：US20180007649A1

公开(公告)日：2018-01-04

申请号：US15197331

申请日：2016-06-29

申请人： Infineon Technologies AG

发明人： Daniele Dal Maistro ,  Marc Tiebout

IPC分类号： H04W56/00 ,  H04B7/06 ,  H04L1/24 ,  H04L5/00

CPC分类号： H04W56/0035 ,  H04B7/0617 ,  H04L1/246 ,  H04L5/005 ,  H04L27/233 ,  H04L2027/0016 ,  H04L2027/0026

摘要： A signal detector device and method includes a quadrature demodulator configured to receive an input signal, a first reference signal, and a second reference signal in quadrature with the first reference signal, the quadrature demodulator further configured to produce a plurality of output signals from the input signal and the first and the second reference signal, the plurality of output signals indicating the amplitude and phase of the input signal, and one or more inverting circuits, the inverting circuits having a first and a second programmable output polarity, the plurality of output signals being output by the quadrature demodulator when the inverting circuits are set to the first programmable output polarity, the plurality of output signals being inverted and output by the quadrature demodulator when the inverting circuits are set to the second programmable output polarity

公开(公告)号：US09735991B1

公开(公告)日：2017-08-15

申请号：US14475648

申请日：2014-09-03

申请人： Georgia Tech Research Corporation

发明人： Stephen E. Ralph ,  Pierre Isautier

IPC分类号： H04B10/60 ,  H04B10/69 ,  H04L27/00 ,  H04B10/61 ,  H04B17/00

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

摘要： Systems and methods for autonomous signal modulation format identification are disclosed. In an example embodiment of the disclosed technology, a method includes mapping an input signal to Stokes space to determine whether a considered number of three-dimensional clusters value is above or below a predetermined value. The method may include selecting a modulation format from a first set of modulation formats if the considered number of three-dimensional clusters value is above the predetermined value. The method may further include applying higher-order statistics if the considered number of three-dimensional clusters value is below the predetermined value.

公开(公告)号：US09722845B2

公开(公告)日：2017-08-01

申请号：US14757821

申请日：2015-12-23

申请人： Intel IP Corporation

发明人： Lu Lu ,  Jinyong Lee ,  Xuan Steven Li ,  Aiguo Yan

IPC分类号： H04L27/22 ,  H04L27/26 ,  H04L27/32 ,  H04B17/20 ,  H04W4/00

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

摘要： 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：US20170180173A1

公开(公告)日：2017-06-22

申请号：US15327600

申请日：2015-08-20

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Miguel Lopez ,  Mårten Sundberg ,  Olof Liberg

IPC分类号： H04L27/20 ,  H04L1/00 ,  H04B1/707 ,  H04L27/233 ,  H04L25/03

CPC分类号： H04L27/201 ,  H04B1/707 ,  H04L1/0054 ,  H04L25/03834 ,  H04L27/2014 ,  H04L27/2017 ,  H04L27/233

摘要： A radio network node comprised, and a wireless device configured to be operative, in a wireless communication system. The radio network node obtains downlink data and converts it to a baseband signal. The conversion comprises Gaussian Minimum Shift Keying (GMSK) modulation of the downlink data. The modulation applies a negative modulation index selected based on a type of wireless device that is a target for the downlink data. A radio signal is provided based on the baseband signal and sent to, and received by, the wireless device that provides user data based on the radio signal.

公开(公告)号：US20170094623A1

公开(公告)日：2017-03-30

申请号：US15278594

申请日：2016-09-28

申请人： ONE Media LLC

发明人： Zahir RAZA ,  Michael SIMON ,  Kevin SHELBY ,  Sandeep Mavuduru KANNAPPA

IPC分类号： H04W56/00 ,  H04L27/26 ,  H04L1/00 ,  H04L5/00

CPC分类号： H04W56/004 ,  H04L1/0058 ,  H04L5/0048 ,  H04L27/227 ,  H04L27/233 ,  H04L27/2628 ,  H04L27/3818 ,  H04L27/3845 ,  H04W56/001 ,  H04W56/0055

摘要： Method and apparatus for signal detection in dynamic channels with high carrier frequency offset are provided. A coherent detector and a non-coherent detector are operated in parallel on a block of samples of an input signal to determine respective time offset candidates of the input signal. The time offset candidate obtained from the non-coherent detector is used to determine a frequency offset candidate of the input signal.

公开(公告)号：US09602238B2

公开(公告)日：2017-03-21

申请号：US14799381

申请日：2015-07-14

申请人： Huawei Technologies Co., Ltd.

发明人： Zhanji Wu ,  Zhiyu Xiao

IPC分类号： H04L1/00 ,  H04L27/10 ,  H04L27/233 ,  H04L27/38

CPC分类号： H04L1/0048 ,  H04L1/005 ,  H04L1/0054 ,  H04L1/0055 ,  H04L1/0058 ,  H04L27/106 ,  H04L27/233 ,  H04L27/3845

摘要： Embodiments of the present invention provide a decoding method and apparatus. The method includes: acquiring a demodulation signal; acquiring a first decoding signal, where the first decoding signal is a signal fed back after the ith M-ary differential decoding processing is performed on the demodulation signal, and i is an integer greater than or equal to 0; and performing M-ary differential decoding processing on the demodulation signal according to the first decoding signal, to obtain a second decoding signal. The first decoding signal that is fed back is added and input to a decoder.

公开(公告)号：US20150180520A1

公开(公告)日：2015-06-25

申请号：US14578119

申请日：2014-12-19

申请人： STMICROELECTRONICS (CANADA), INC.

发明人： Jose Augusto Lima ,  Antonio Mascioli

IPC分类号： H04B1/10

CPC分类号： H04B1/10 ,  H04L25/0328 ,  H04L27/233

摘要： Interference cancellation for wideband and narrowband communications systems is provided without apriori knowledge of statistical information about an interfering signal. In one embodiment a demodulator circuit can operate in an environment where a “no lock” situation would normally occur to remove the interference and acquire signals in low signal-to-noise ratio conditions and high signal-to-interference ration conditions. In other embodiments, performance is improved by introducing statistics of the interfering signal, and these statistics regarding the communications channel and interference properties (i.e., characteristics of the interfering signal) can be adaptive or “learned” in other embodiments.

摘要翻译： 提供宽带和窄带通信系统的干扰消除，而无需关于干扰信号的统计信息的知识。 在一个实施例中，解调器电路可以在通常发生“无锁定”情况的环境中操作，以消除干扰并获取低信噪比条件和高信噪比条件下的信号。 在其他实施例中，通过引入干扰信号的统计来提高性能，并且关于通信信道和干扰特性（即干扰信号的特性）的这些统计信息在其它实施例中可以是自适应的或“学习的”。

公开(公告)号：US08644425B2

公开(公告)日：2014-02-04

申请号：US13312476

申请日：2011-12-06

申请人： James A. Norris ,  John W. Nieto

发明人： James A. Norris ,  John W. Nieto

IPC分类号： H04L27/00

CPC分类号： H04L27/233

摘要： A wireless communications device includes a receiver, and a demodulator coupled downstream from the receiver and configured to use a continuous phase modulation (CPM) waveform to non-coherently demodulate a received signal. The demodulator is configured to generate waveform banks, each waveform bank having a respective different frequency offset associated therewith, determine a correlation output metric for each waveform bank, select a waveform bank for demodulating the received signal based upon the correlation output metrics of the waveform banks, and demodulate the received signal using the selected waveform bank and the associated frequency offset.

摘要翻译： 无线通信设备包括接收机和耦合在接收机下游的被配置成使用连续相位调制（CPM）波形来对接收到的信号进行非相干解调的解调器。 解调器被配置为生成波形组，每个波形组具有与其相关联的相应不同的频率偏移，确定每个波形组的相关输出度量，基于波形组的相关输出度量来选择用于解调接收信号的波形组 并且使用所选择的波形组和相关联的频率偏移解调接收信号。