Internal noise suppression for DNS of a turbulent jet-pipe configuration

2014 ◽  
Author(s):  
Richard D. Sandberg ◽  
Brian J. Tester ◽  
Simone Olivetti
Keyword(s):  
Noise Suppression ◽  
Internal Noise ◽  
Turbulent Jet

Internal noise suppression for speech recognition by small robots

2005 ◽  
Author(s):  
Akinori Ito ◽  
Takashi Kanayama ◽  
Motoyuki Suzuki ◽  
Shozo Makino
Keyword(s):  
Speech Recognition ◽  
Noise Suppression ◽  
Internal Noise

FULL DUPLEX IN COMMUNICATIONS SYSTEMS - METHOD OF ENHANCEMENT THE EFFICIENCY OF USING THE RADIO FREQUENCY SPECTRUM. ANALYTICAL REVIEW

2020 ◽  
Author(s):  
М.А. БЫХОВСКИЙ
Keyword(s):  
Radio Frequency ◽  
Frequency Spectrum ◽  
Communication Systems ◽  
Noise Suppression ◽  
Internal Noise ◽  
Full Duplex ◽  
Scientific Publications ◽  
Radio Frequency Spectrum ◽  
Analytical Review ◽  
Mobile Satellite

Представлен аналитический обзор научных публикаций, в которых рассматриваются вопросы построения систем связи с полным дуплексом (FD). В таких системах передача и прием сообщений осуществляются в одном и том же частотном канале, что позволяет существенно повысить эффективность использования радиочастотного спектра по сравнению с современными системами связи с частотным или временным дуплексом. В статье рассмотрены разные функциональные схемы построения систем связи с FD: системы, в которых применяются несколько отдельных приемных и передающих антенн; системы с одной приемо-передающей антенной. Рассмотрены системы,в которых для подавления внутренних помех используются компенсаторы помех,разные виды циркуляторов и балансные системы с несколькими циркуляторами. Представлены формулы,которые позволяют определить величину подавления внутренних помех в разных системах. В обзоре приведены полученные в ряде опубликованных работ экспериментальные данные о величине подавления внутренних помех для разных систем с FD. Обсуждаются актуальность разработки систем связи с FD/а также их важные области применения в подвижной, спутниковой и радиорелейной связи. The paper presents an analytical review of scientific publications, which consider the issues of building communication systems with full duplex (FD). In such systems, the transmission and reception of messages are carried out on the same frequency channel, which makes it possible to significantly increase the efficiency of radio frequency spectrum usage compared to modern communication systems with frequency (FDD) or time (TDD) division duplex. The article discusses different functional schemes for constructing communication systems with FD: systems that use several separate receiving and transmitting antennas and systems with one transceiver antenna. The paper provides an overview of systems that use noise compensators, different types of circulators, and balanced systems with several circulators for internal noise suppression. The author also presents formulas that allow calculating the value of the suppression of the internal noise in different systems. The review presents experimental data obtained in several published works about the value of suppression of internal noise for various systems with FD. The paper discusses the relevance of the development of FD communication systems, as well as important areas of their application in mobile, satellite, and radio relay communications.

Endogenous Noise Suppression During Covert Orienting

2000 ◽  
Author(s):  
Edward Awh ◽  
John Serences ◽  
Kelsey Libner ◽  
Michi Matsukura
Keyword(s):  
Noise Suppression ◽  
Covert Orienting

An Absolute Phase Estimation Method for Interferometry Imagery

2019 ◽  
Vol 1 (2) ◽  
pp. 14-19
Author(s):  
Sui Ping Lee ◽  
Yee Kit Chan ◽  
Tien Sze Lim
Keyword(s):  
Noise Suppression ◽  
Estimation Method ◽  
Phase Image ◽  
Phase Estimation ◽  
Phase Reconstruction ◽  
Estimation Algorithms ◽  
Absolute Phase ◽  
Filtering Rate ◽  
Interferometric Phase ◽  
Image Performance

Accurate interpretation of interferometric image requires an extremely challenging task based on actual phase reconstruction for incomplete noise observation. In spite of the establishment of comprehensive solutions, until now, a guaranteed means of solution method is yet to exist. The initially observed interferometric image is formed by 2π-periodic phase image that wrapped within (-π, π]. Such inverse problem is further corrupted by noise distortion and leads to the degradation of interferometric image. In order to overcome this, an effective algorithm that enables noise suppression and absolute phase reconstruction of interferometric phase image is proposed. The proposed method incorporates an improved order statistical filter that is able to adjust or vary on its filtering rate by adapting to phase noise level of relevant interferometric image. Performance of proposed method is evaluated and compared with other existing phase estimation algorithms. The comparison is based on a series of computer simulated and real interferometric data images. The experiment results illustrate the effectiveness and competency of the proposed method.

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