Results 31 to 40 of about 456,541 (295)
Joint 2-D angles and time delay estimation of coherent wideband signals [PDF]
MATEC Web of Conferences, 2020 Joint direction of arrival (DOA) and time delay (TD) estimation of wideband signals such as WIFI and mobile communication signals has to face the challenges aroused by multipath effect in indoor environments.
Li Xiangzhi +6 more
doaj +1 more source
Generalized PSK in Space Time Coding [PDF]
, 2004 A wireless communication system using multiple antennas promises reliable transmission under Rayleigh flat fading assumptions. Design criteria and practical schemes have been presented for both coherent and non-coherent communication channels.
Han, Guangyue
core +3 more sources
Robust Suppression of Deceptive Jamming with VHF-FDA-MIMO Radar under Multipath Effects
Remote Sensing, 2022 Frequency diverse array multiple-input multiple-output (FDA-MIMO) radar has received a lot of attention due to the advantages of waveform diversity. Suppression of mainlobe deceptive jamming can be effectively achieved with the degree of freedom (DOF) in
Yibin Liu +4 more
doaj +1 more source
Detection of coherent-pulse multi-frequency signals
Известия высших учебных заведений. Поволжский регион:Технические науки, 2022 Background. The detection of coherent-pulse multi-frequency radar signals against the background of the receiver's own noise is considered. The purpose of this research is to synthesize and analyze algorithms for detecting quasi-deterministic and ...
D.I. Popov
doaj +1 more source
A self-coherent receiver for detection of PolMUX coherent signals
Optics Express, 2012 A self-coherent receiver capable of demultiplexing PolMUX-signals without an external polarization controller is presented. Training sequences are introduced to estimate the polarization rotation, and a decision feedback recursive algorithm mitigates the random walk of the recovered field.
Li, Jingshi +10 more
openaire +4 more sources
Multiple Signals of Coherence Relations [PDF]
Discours, 2019 In this paper, we investigate the signalling of coherence relations when they are simultaneously indicated by more than one signal. In particular, we examine the co-occurrence of discourse markers and other relational signals when they are used together to mark a single relation. With the goal to identify the source of the usage of multiple signals, we
Das, Debopam, Taboada, Maite
openaire +3 more sources
DAB Signal Preprocessing for Passive Coherent Location [PDF]
Sensors, 2022 Digital Audio Broadcast (DAB) transmitters can be successfully used as illumination sources in Passive Coherent Location (PCL). However, extending the integration time in such a configuration leads to the occurrence of periodical artifacts in the bistatic range/Doppler plots, resulting from the time structure of the DAB signal.
openaire +3 more sources
EURASIP Journal on Wireless Communications and Networking, 2019 Estimating direction of arrival (DOA) is important in a variety of practical applications. Conventional cyclostationarity-based coherent DOA estimation algorithms are not robust to non-Gaussian α-stable impulsive noise.
Yang Liu +4 more
doaj +1 more source
Number of Coherent Nodes Estimation Based on Multiple Feature Extraction in Wireless Sensor Network
IEEE Access, 2020 Knowing number of nodes is the precondition of their locating and estimation of other parameters in wireless sensor network, actually it can be evaluated according to the signal received by the sensor array.
Jiaqi Zhen, Xiaoli Zhang
doaj +1 more source
Distinctive character of electronic and vibrational coherences in disordered molecular aggregates
, 2013 Coherent dynamics of coupled molecules are effectively characterized by the two-dimensional (2D) electronic coherent spectroscopy. Depending on the coupling between electronic and vibrational states, oscillating signals of purely electronic, purely ...
Abramavicius, Darius +3 more
core +1 more source