MX360550B - Aparato y método de cancelación de interferencia. - Google Patents

Aparato y método de cancelación de interferencia.

Info

Publication number
MX360550B
MX360550B MX2016017327A MX2016017327A MX360550B MX 360550 B MX360550 B MX 360550B MX 2016017327 A MX2016017327 A MX 2016017327A MX 2016017327 A MX2016017327 A MX 2016017327A MX 360550 B MX360550 B MX 360550B
Authority
MX
Mexico
Prior art keywords
signal
interference
self
digital
reference signal
Prior art date
Application number
MX2016017327A
Other languages
English (en)
Other versions
MX2016017327A (es
Inventor
Liu Sheng
Chen Teyan
Original Assignee
Huawei Tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Tech Co Ltd filed Critical Huawei Tech Co Ltd
Publication of MX2016017327A publication Critical patent/MX2016017327A/es
Publication of MX360550B publication Critical patent/MX360550B/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • H04B7/15585—Relay station antennae loop interference reduction by interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

Modalidades de la presente invención se refieren al campo de las tecnologías de comunicaciones, y proporcionan un aparato y método de cancelación de interferencia, los cuales pueden evitar que quede limitada por un rango dinámico de un ADC/DAC y puede cancelar un componente de auto-interferencia de segundo tipo en forma efectiva; el método incluye: adquirir una señal de referencia de radiofrecuencia; recibir una señal de recepción de radiofrecuencia utilizando una antena de recepción principal; cancelar un componente de auto-interferencia de primer tipo en la señal de recepción de radiofrecuencia de acuerdo con la señal de referencia de radiofrecuencia, para generar una primera señal procesada; adquirir la señal de auto-interferencia reconstruida de acuerdo con un parámetro de canal de auto-interferencia y la señal de referencia de radiofrecuencia; cancelar un componente de auto-interferencia de segundo tipo en la primera señal procesada de acuerdo con la señal de auto-interferencia reconstruida para generar una segunda señal procesada; ejecutar el procesamiento de conversión descendente en la segunda señal procesada para generar una tercera señal procesada; ejecutar conversión análogo a digital en la tercera señal procesada para generar una señal digital; y adquirir una señal de referencia de banda base digital, y ejecutar estimación de canal de auto-interferencia de acuerdo con la señal de referencia de banda base digital y la señal digital para adquirir el parámetro de canal de auto-interferencia; la presente invención se utiliza para cancelación de interferencia.
MX2016017327A 2014-06-26 2014-06-26 Aparato y método de cancelación de interferencia. MX360550B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/080870 WO2015196428A1 (zh) 2014-06-26 2014-06-26 一种干扰消除的装置和方法

Publications (2)

Publication Number Publication Date
MX2016017327A MX2016017327A (es) 2017-07-07
MX360550B true MX360550B (es) 2018-10-26

Family

ID=54936490

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2016017327A MX360550B (es) 2014-06-26 2014-06-26 Aparato y método de cancelación de interferencia.

Country Status (12)

Country Link
US (1) US9973224B2 (es)
EP (1) EP3151438B1 (es)
JP (1) JP6562566B2 (es)
KR (1) KR101901220B1 (es)
CN (1) CN106464284B (es)
AU (1) AU2014399209B2 (es)
BR (1) BR112016030506B1 (es)
CA (1) CA2953658C (es)
MX (1) MX360550B (es)
RU (1) RU2664392C2 (es)
SG (1) SG11201610769YA (es)
WO (1) WO2015196428A1 (es)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9001920B2 (en) * 2013-02-19 2015-04-07 At&T Intellectual Property I, Lp Apparatus and method for interference cancellation in communication systems
WO2015021461A1 (en) 2013-08-09 2015-02-12 Kumu Networks, Inc. Systems and methods for non-linear digital self-interference cancellation
WO2015054858A1 (zh) * 2013-10-17 2015-04-23 华为技术有限公司 一种信道估计方法、装置及系统
CA2953658C (en) 2014-06-26 2020-05-12 Huawei Technologies Co., Ltd. Interference cancellation apparatus and method
JP6339702B2 (ja) * 2014-06-26 2018-06-06 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． 干渉除去装置および方法
WO2015196404A1 (zh) 2014-06-26 2015-12-30 华为技术有限公司 一种干扰消除的装置和方法
PL226101B1 (pl) * 2015-02-10 2017-06-30 Sławomir Szechniuk Sposob redukcji zaklocen i szumow w ukladach z dwoma torami sygnalow oraz filtr fazowy
US10033542B2 (en) 2015-07-15 2018-07-24 Cisco Technology, Inc. Scheduling mechanisms in full duplex cable network environments
US9912464B2 (en) 2015-07-15 2018-03-06 Cisco Technology, Inc. Interference relationship characterization in full duplex cable network environments
US9966993B2 (en) * 2015-07-15 2018-05-08 Cisco Technology, Inc. Interference suppression in full duplex cable network environments
US9942024B2 (en) 2015-07-15 2018-04-10 Cisco Technology, Inc. Full duplex network architecture in cable network environments
US10230423B2 (en) * 2015-11-10 2019-03-12 Huawei Technologies Canada Co., Ltd. System and method for balanced passive cancellation for full duplex communications
US9742593B2 (en) 2015-12-16 2017-08-22 Kumu Networks, Inc. Systems and methods for adaptively-tuned digital self-interference cancellation
US10797750B2 (en) 2016-02-24 2020-10-06 Cisco Technology, Inc. System architecture for supporting digital pre-distortion and full duplex in cable network environments
EP3440779A1 (en) * 2016-04-05 2019-02-13 Telefonaktiebolaget LM Ericsson (publ) Interference supression in a radio transceiver device
CN107276599B (zh) * 2016-04-07 2021-05-04 中兴通讯股份有限公司 抗干扰方法、电路及移动终端
US10389510B2 (en) * 2016-07-22 2019-08-20 Electronics And Telecommunications Research Institute Self-interference signal cancellation apparatus and transceiver including the same
TW201820796A (zh) * 2016-11-17 2018-06-01 財團法人資訊工業策進會 針對全雙工通訊裝置的自干擾消除訊號產生裝置與方法
US10103774B1 (en) 2017-03-27 2018-10-16 Kumu Networks, Inc. Systems and methods for intelligently-tuned digital self-interference cancellation
CN111052642B (zh) * 2017-06-06 2023-12-26 弗劳恩霍夫应用研究促进协会 射频通信和干扰设备及相应的方法
EP3627724A4 (en) * 2017-06-26 2020-06-17 Guangdong Oppo Mobile Telecommunications Corp., Ltd. WIRELESS COMMUNICATION METHOD AND DEVICE
CN107359896B (zh) * 2017-06-27 2019-06-07 电子科技大学 一种三维区域内电磁波设备的干扰抑制系统及方法
CN107547105B (zh) * 2017-08-31 2019-10-18 电子科技大学 一种用于抵消不可分辨多径的全双工射频自干扰抑制方法
EP3499731B1 (en) * 2017-12-18 2021-07-14 NXP USA, Inc. Interference cancellation of expected interference signal
US10425115B2 (en) 2018-02-27 2019-09-24 Kumu Networks, Inc. Systems and methods for configurable hybrid self-interference cancellation
KR102503541B1 (ko) * 2018-09-04 2023-02-27 삼성전자주식회사 데이터 통신 신호로부터 무선 전력에 의한 간섭을 제거하는 전자 장치 및 그 작동 방법
KR20200071491A (ko) * 2018-12-11 2020-06-19 삼성전자주식회사 안테나를 통해 수신된 신호의 적어도 일부를 감쇄하기 위한 전자 장치 및 통신 신호 제어 방법
US10868661B2 (en) 2019-03-14 2020-12-15 Kumu Networks, Inc. Systems and methods for efficiently-transformed digital self-interference cancellation
CN116318240A (zh) 2019-04-25 2023-06-23 华为技术有限公司 一种全双工自干扰消除方法和装置
US11159197B2 (en) * 2019-04-29 2021-10-26 Qualcomm Incorporated Self-interference cancellation for in-band full-duplex wireless communication
JP7269144B2 (ja) * 2019-10-07 2023-05-08 株式会社東芝 レーダ装置、信号処理装置、および方法
US11245430B1 (en) * 2020-08-14 2022-02-08 Apple Inc. Wireless transmitters having self-interference cancellation circuitry
CN111948614B (zh) * 2020-08-20 2023-01-10 电子科技大学 一种相控阵雷达宽带自干扰射频域分段对消系统及方法
CN112235073B (zh) * 2020-10-22 2023-09-01 维沃移动通信有限公司 干扰信号的抵消方法、驱动集成电路和电子设备
US11726166B2 (en) * 2020-11-18 2023-08-15 Kabushiki Kaislia Toshiba Dual polar full duplex radar transceiver
CN114726459A (zh) * 2021-01-04 2022-07-08 中国移动通信有限公司研究院 一种干扰消除方法、装置及设备
CN113206677B (zh) * 2021-04-28 2022-09-27 中国电子科技集团公司第三十六研究所 一种自干扰抵消器
CN115276686B (zh) * 2022-06-22 2024-03-01 中国科学院国家天文台 低频射电频谱仪干扰信号的处理方法、装置、设备及介质
CN116112324A (zh) * 2023-02-02 2023-05-12 电子科技大学 一种同时同频自干扰收发联合抑制方法

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9423027D0 (en) 1994-11-15 1995-01-04 Univ Bristol Full-duplex radio transmitter/receiver
US5691978A (en) * 1995-04-07 1997-11-25 Signal Science, Inc. Self-cancelling full-duplex RF communication system
JP3603714B2 (ja) * 2000-01-06 2004-12-22 Ｋｄｄｉ株式会社 符号分割多元接続方式用リピータ装置
US20030098806A1 (en) * 2001-11-27 2003-05-29 Green Evan R. Rejecting interference for simultaneous received signals
CN1553601A (zh) * 2003-06-03 2004-12-08 西门子（中国）有限公司 时分双工系统中消除自生干扰的方法
US7804760B2 (en) * 2003-08-07 2010-09-28 Quellan, Inc. Method and system for signal emulation
EP1687929B1 (en) * 2003-11-17 2010-11-10 Quellan, Inc. Method and system for antenna interference cancellation
JP2008017341A (ja) * 2006-07-07 2008-01-24 Ntt Docomo Inc 無線通信装置および無線通信方法
CN101563851A (zh) 2006-11-06 2009-10-21 诺基亚公司 用于自干扰消除的模拟信号路径建模
CN101453228B (zh) * 2007-12-04 2013-04-17 松下电器产业株式会社 共站址干扰消除系统和方法
US8526903B2 (en) 2008-03-11 2013-09-03 Qualcomm, Incorporated High-linearity receiver with transmit leakage cancellation
US8249540B1 (en) * 2008-08-07 2012-08-21 Hypres, Inc. Two stage radio frequency interference cancellation system and method
CN101656562B (zh) * 2009-09-22 2012-07-18 武汉虹信通信技术有限责任公司 一种实现直放站自激干扰消除的装置及方法
KR101386839B1 (ko) 2010-05-18 2014-04-18 엘에스산전 주식회사 Ｒｆｉｄ 시스템의 송신누설신호 제거장치
US8630211B2 (en) 2010-06-30 2014-01-14 Qualcomm Incorporated Hybrid radio architecture for repeaters using RF cancellation reference
US10284356B2 (en) * 2011-02-03 2019-05-07 The Board Of Trustees Of The Leland Stanford Junior University Self-interference cancellation
US9019849B2 (en) * 2011-11-07 2015-04-28 Telefonaktiebolaget L M Ericsson (Publ) Dynamic space division duplex (SDD) wireless communications with multiple antennas using self-interference cancellation
US10243719B2 (en) * 2011-11-09 2019-03-26 The Board Of Trustees Of The Leland Stanford Junior University Self-interference cancellation for MIMO radios
WO2015048678A1 (en) 2013-09-27 2015-04-02 The Board Of Trustees Of The Leland Stanford Junior University Self-interference cancellation for mimo radios
CN103139115B (zh) 2011-11-25 2016-08-03 华为技术有限公司 一种干扰对齐方法、装置及系统
KR101342760B1 (ko) * 2011-12-01 2013-12-19 연세대학교 산학협력단 노드, 릴레이 노드 및 이의 제어 방법
CN103200140B (zh) 2012-01-06 2016-05-11 微思泰（北京）信息技术有限公司 一种基于预均衡的干扰消除系统及方法
EP2850741B1 (en) 2012-05-13 2019-05-01 Amir Khandani Distributed collaborative signaling in full duplex wireless transceivers
US8842584B2 (en) 2012-07-13 2014-09-23 At&T Intellectual Property I, L.P. System and method for full duplex cancellation
CN103595520B (zh) 2012-08-16 2017-08-04 华为技术有限公司 通讯装置及其空分双工方法
CN103685098B (zh) 2012-09-07 2017-04-12 华为技术有限公司 一种干扰信号的处理方法、装置和系统
CN104737456B (zh) 2012-10-17 2016-11-09 株式会社村田制作所 收发装置
US8964608B2 (en) 2013-01-11 2015-02-24 Futurewei Technologies, Inc. Interference cancellation for division free duplexing or full duplex operation
CN103297069B (zh) 2013-05-08 2015-05-20 北京工业大学 一种全双工无线电射频干扰删除装置与方法
US9100110B2 (en) * 2013-08-29 2015-08-04 Qualcomm Incorporated Non-linear interference cancellation with multiple aggressors
CN103427874B (zh) * 2013-09-03 2015-03-11 电子科技大学 多径环境下大发射功率同时同频自干扰抵消系统及方法
CN103427872B (zh) * 2013-09-03 2015-01-21 电子科技大学 一种同时同频全双工多抽头射频自干扰抵消系统及方法
CN103580720B (zh) 2013-11-20 2015-07-08 东南大学 一种同频全双工自干扰抵消装置
KR101792626B1 (ko) 2013-11-29 2017-11-02 후아웨이 테크놀러지 컴퍼니 리미티드 통신 시스템의 자기 간섭 신호를 감소시키기 위한 방법 및 장치
CN105474549B (zh) * 2013-12-04 2018-05-11 华为技术有限公司 收发共用天线的自干扰消除方法、收发机和通信设备
CN103701480A (zh) 2013-12-31 2014-04-02 上海交通大学 无线全双工单输入单输出通信模拟自干扰信号消除装置
CN106134095B (zh) * 2014-03-20 2019-08-23 华为技术有限公司 用于自干扰消除的装置和方法
WO2015196404A1 (zh) 2014-06-26 2015-12-30 华为技术有限公司 一种干扰消除的装置和方法
CA2953658C (en) 2014-06-26 2020-05-12 Huawei Technologies Co., Ltd. Interference cancellation apparatus and method
JP6339702B2 (ja) 2014-06-26 2018-06-06 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． 干渉除去装置および方法

Also Published As

Publication number Publication date
US20170104506A1 (en) 2017-04-13
RU2017102384A (ru) 2018-08-02
WO2015196428A1 (zh) 2015-12-30
SG11201610769YA (en) 2017-01-27
US9973224B2 (en) 2018-05-15
AU2014399209B2 (en) 2018-03-29
AU2014399209A1 (en) 2017-02-02
JP2017520192A (ja) 2017-07-20
EP3151438B1 (en) 2019-04-10
JP6562566B2 (ja) 2019-08-21
CN106464284B (zh) 2019-08-16
CN106464284A (zh) 2017-02-22
CA2953658A1 (en) 2015-12-30
RU2664392C2 (ru) 2018-08-17
EP3151438A4 (en) 2017-07-12
KR101901220B1 (ko) 2018-09-21
MX2016017327A (es) 2017-07-07
CA2953658C (en) 2020-05-12
EP3151438A1 (en) 2017-04-05
RU2017102384A3 (es) 2018-08-02
KR20170018452A (ko) 2017-02-17
BR112016030506B1 (pt) 2023-04-11
BR112016030506A2 (es) 2017-08-22

Similar Documents

Publication Publication Date Title
MX360550B (es) Aparato y método de cancelación de interferencia.
MX2016017320A (es) Aparato y metodo de cancelacion de interferencia.
WO2012110930A3 (en) Satellite receiver with interfering signal cancellation
GB2555048A (en) Electron paramagnetic resonance (EPR) system with active cancellation
WO2016118365A3 (en) Switched, simultaneous and cascaded interference cancellation
MX2013007263A (es) Mitigacion de interferencia en un dispositivo que tiene multiples radios.
MX2015008647A (es) Un nodo de radio, un nodo de control, un nodo de coordinacion y metodos en los mismos.
GB2539156A (en) Method and system for multiband interference mitigation with multipath cancellation
MX2019012995A (es) Codificación de forma de onda con modulación para transmisiones de usuario único y de usuarios múltiples.
WO2016116761A3 (en) Apparatus and method for filtering radio frequency signals of transceiver integrated circuits
WO2015047905A3 (en) Improving performance of a user equipment (ue) in unlicensed spectrum
WO2015127816A1 (zh) 一种减少邻频干扰的方法及中继设备
MX2019008156A (es) Dispositivo de transmision, dispositivo de recepcion, metodo de transmision y metodo de recepcion.
GB201205960D0 (en) Mitigating interference in wireless communication system
WO2015061963A8 (zh) 无线全双工系统的数字干扰抵消装置和方法及收发信机
GB2533539A (en) High throughput interference cancelling radio transceiver and antenna therefor
PH12021550066A1 (en) Systems and methods for improving wireless mesh networks
WO2013156044A8 (en) Technique for calibrating a receiver apparatus
TW201613284A (en) Power offset signaling techniques for network-assisted interference cancellation and suppression (NAICS) receivers
MX2019002766A (es) Metodo y aparato para paliar una falla en un sistema de antenas distribuido.
WO2018164761A8 (en) Phase tracking reference signal indication in multi-user superposition transmission
MX2022015854A (es) Sistemas y metodos para mitigar la interferencia dentro del espectro usado activamente.
WO2011157165A3 (zh) 一种分布式基站系统
MX2017001292A (es) Dispositivo de ocultamiento para mejorar el rango dinamico de las mediciones electromagneticas.
GB2547099A (en) System and method for ultra wideband radio frequency scanning and signal generation

Legal Events

Date Code Title Description
FG Grant or registration