Results 271 to 280 of about 2,082,160 (325)

FRFT-Based Interference Suppression for OFDM Systems in IoT Environment

IEEE Communications Letters, 2019
The OFDM technology has been widely used in 4G, 5G, and other wireless communication systems for its anti-frequency selective fading and high spectral efficiency. However, OFDM systems are very sensitive to narrowband interference (NBI).
Chengwen Zhang, Jun Shi, Zheming Zhang, Yutao Liu, Xudong Hu   +4 more
semanticscholar   +1 more source

Interference suppression for DS/CDMA

IEEE Transactions on Communications, 1999
A direct-sequence spread spectrum (DS/SS) receiver for suppressing multiple-access interference in direct-sequence code-division multiple-access (DS/CDMA) communication systems is introduced. The proposed receiver does not require knowledge of other users' spreading codes, timing, or phase information.
R. Singh, L.B. Milstein
openaire   +1 more source

Fat suppression by echo interference

Magma: Magnetic Resonance Materials in Physics, Biology, and Medicine, 1994
Two spectral components of a binary system, like water and fat in proton magnetic resonance imaging (MRI) can be separated by adding two signals acquired with a different delay (the Dixon method). The same effect can be obtained in a single acquisition by interference of two shifted echoes.
F. Hennel, J. F. Nédélec, J. P. Macher
openaire   +1 more source

Coherent Optical RF Channelizer With Large Instantaneous Bandwidth and Large In-Band Interference Suppression

Journal of Lightwave Technology, 2018
RF channelization is regarded as one of the most effective approaches to relieve the difficulty of processing wideband signals in microwave and millimeter-wave receivers.
Zhenzhou Tang, Dan Zhu, S. Pan
semanticscholar   +1 more source

Interference suppression via orthogonal projections

[1992] IEEE Sixth SP Workshop on Statistical Signal and Array Processing, 2003
A technique for suppressing interference in phased array antennas, called the orthogonal projection algorithm, is described. Its performance is characterized theoretically and validated using Monte-Carlo simulations. An orthonormal basis for the interference subspace is calculated in the absence of target, and interference is suppressed by projection ...
K. Abend, H. Subbaram
openaire   +1 more source

A Novel Tensor Technique for Simultaneous Narrowband and Wideband Interference Suppression on Single-Channel SAR System

IEEE Transactions on Geoscience and Remote Sensing, 2019
Nowadays, in the electromagnetism environment, the complex interferences, including the narrowband interferences (NBIs) and wideband interferences (WBIs), may severely affect the imaging quality of synthetic aperture radar (SAR) systems. Most traditional
Y. Huang, Lei Zhang, Jie Li, Wei Hong, A. Nehorai   +4 more
semanticscholar   +1 more source

Cochannel Talker Interference Suppression

1991
Abstract : Cochannel talker interference suppression is defined as the processing of a waveform containing two simultaneous speech signals, referred to as the target and the jammer, to produce a signal containing an estimate of the target speech signal alone.
openaire   +1 more source

Waveform covariance matrix design for robust signal-dependent interference suppression in colocated MIMO radars

Signal Processing, 2018
In multiple-input multiple-output (MIMO) radars, interference can be properly suppressed by designing transmit waveforms. However, having an error in initial estimation of interferers’ locations can result in degradation of signal-to-interference-plus ...
Mostafa Bolhasani, E. Mehrshahi, S. Ghorashi   +2 more
semanticscholar   +1 more source

Radio Frequency Interference Suppression

2011
Section 3.8 presented the problem of the radio frequency interference (RFI) environment in ultra wideband (UWB) radar operation from the standpoint of background clutter. This chapter will cover the significant design factors needed to operate a foliage penetration (FOPEN) radar, in either synthetic aperture radar (SAR) or ground moving target ...
openaire   +1 more source

Interference suppression by biased nonlinearities

IEEE Transactions on Information Theory, 1995
A method for suppressing the interference by biased nonlinearities is presented. The memoryless nonlinearity taken into account is of the form \(y(x) = (|x |- \xi)^\nu\) for \(|x |> \xi\), and \(y(x) = 0\) for \(|x |\leq \xi\), where \(\xi > 0\) and \(\nu\) a positive number greater than \(-1\).
Jain, Pravin C., Blachman, Nelson M., Chapell, Paul M.   +2 more
openaire   +1 more source