Transmit-reference methods in software defined radio platforms for communication in harsh propagation environments and systems thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-015/00
H04K-003/00
출원번호
US-0795571
(2010-06-07)
등록번호
US-8971441
(2015-03-03)
발명자
/ 주소
Dowla, Farid U.
Nekoogar, Faranak
출원인 / 주소
Lawrence Livermore National Security, LLC
대리인 / 주소
Zilka Kotab
인용정보
피인용 횟수 :
4인용 특허 :
12
초록▼
A method for adaptive Radio Frequency (RF) jamming according to one embodiment includes dynamically monitoring a RF spectrum; detecting any undesired signals in real time from the RF spectrum; and sending a directional countermeasure signal to jam the undesired signals. A method for adaptive Radio F
A method for adaptive Radio Frequency (RF) jamming according to one embodiment includes dynamically monitoring a RF spectrum; detecting any undesired signals in real time from the RF spectrum; and sending a directional countermeasure signal to jam the undesired signals. A method for adaptive Radio Frequency (RF) communications according to another embodiment includes transmitting a data pulse in a RF spectrum; and transmitting a reference pulse separated by a predetermined period of time from the data pulse; wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated. A method for adaptive Radio Frequency (RF) communications according to yet another embodiment includes receiving a data pulse in a RF spectrum; and receiving a reference pulse separated in time from the data pulse, wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated; and demodulating the pulses.
대표청구항▼
1. A Radio Frequency (RF) communications system, comprising: a satellite uplink base station, wherein the satellite uplink base station comprises: a router;a power supply configured to provide power to the satellite uplink base station; anda broadband global area network (BGAN) satellite uplink conf
1. A Radio Frequency (RF) communications system, comprising: a satellite uplink base station, wherein the satellite uplink base station comprises: a router;a power supply configured to provide power to the satellite uplink base station; anda broadband global area network (BGAN) satellite uplink configured to maintain a satellite uplink connection while the satellite uplink is in motion, wherein the BGAN satellite uplink is operatively coupled to the router; andone or more ultra-wideband (UWB) radios, each UWB radio being a software-defined radio (SDR) system comprising a processor configured to execute software, the software being configured to cause the SDR system to: perform an interference modulation technique to adaptively jam one or more undesired signals, wherein the performing the interference modulation technique to adaptively jam the one or more undesired signals includes: determining one or more characteristics of the one or more undesired signals, andgenerating one or more jamming signals based on the one or more determined characteristics of the undesired signals,wherein each of the one or more jamming signals are characterized by a signal bandwidth ranging from narrow-band to ultra-wideband,wherein the one or more jamming signals are configured to jam the undesired signals simultaneously, andwherein the one or more jamming signals comprise directional countermeasure signals; andperform Transmit-Reference (TR) modulation in real-time by adaptively changing each of the following parameters of the SDR system, singly or in combination, in real-time: an operating frequency,a pulse shape,a delay between pulses,a delay between symbols,a pulse width,a modulation scheme,an encryption,an error correction, anda power output,wherein the one or more UWB radios are each configured to communicate with the satellite uplink base station using wireless communications that are controlled by the SDR system thereof,wherein the one or more UWB radios each comprise one or more interfaces for coupling to one or more endpoint devices,wherein at least one of the one or more UWB radios facilitate communication between the satellite uplink base station and the one or more endpoint devices when the one or more endpoint devices are coupled to the at least one UWB radio,wherein the at least one of the one or more UWB radios facilitate communication between the satellite uplink base station and the one or more endpoint devices using one or more of a primary communications network and a backup communications network,wherein at least one of the primary communication network and the backup communications network is an Emergency Communications Network,wherein the at least one of the one or more UWB radios are configured to implement one or more interference modulation techniques in software, at least one of the interference modulation techniques being configured to mitigate narrowband interference external to the UWB radios,wherein the one or more UWB radios are configured to use multipulse modulation,wherein the multipulse modulation comprises: transmitting a data pulse separated in time from a reference pulse,wherein the data pulse is modulated with data,wherein the reference pulse is unmodulated,wherein the data pulse and the reference pulse are wideband pulses chosen from a group consisting of: Gaussian, chirp, and Hermite-based, andwherein the data pulse is modulated with data based on a relative polarity of the data pulse and the reference pulse,wherein the one or more UWB radios are configured to use multipath receivers to enhance a signal-to-noise (SNR) ratio, andwherein the one or more endpoint devices each comprise: a commercial off the shelf (COTS) device that is configured to perform data and voice communications; andan interface for coupling the endpoint device to the one or more UWB radios. 2. The Radio Frequency (RF) communication system of claim 1, wherein the directional countermeasure signals are sent only towards a direction of a source of the undesired signals.
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이 특허에 인용된 특허 (12)
Dobson Robin (Modbury Heights AUX), Adaptive antenna array.
Dowla, Farid; Nekoogar, Faranak, Transmit-reference methods in software defined radio platforms for communication in harsh propagation environments and systems thereof.
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