Results 11 to 20 of about 38,051,230 (246)

Drivers’ Warning Application Through Personalized DSSS-CDMA Data Transmission by Using the FM Radio Broadcasting Infrastructure

open access: yesIEEE Access, 2023
In this paper, a new drivers’ warning application through personalized Direct-Sequence Spread Spectrum Code-Division Multiple Access (DSSS-CDMA) transmissions, performed using the FM radio broadcasting infrastructure is presented.
Radu Gabriel Bozomitu, Florin Doru Hutu
doaj   +1 more source

Review of ther book entitled Discrete Communication Systems by Stevan Berber, Oxford University Press, 2021

open access: yesVojnotehnički Glasnik, 2023
The book contains the theory of discrete communication systems that are presented in the form of block schematics defined by mathematical operators. For the sake of comparison, the theory of digital communication systems is added to understand better the
Nebojša N. Gaćeša
doaj   +1 more source

MIMO precoding for filter bank modulation systems based on PSVD [PDF]

open access: yes, 2011
In this paper we consider the design of a linearly precoded MIMO transceiver based on filter bank (FB) modulation for transmission over broadband frequency selective fading channels.
Moret, Nicola   +2 more
core   +3 more sources

Circularly Symmetric Companding Quantization-Inspired Hybrid Constellation Shaping for APSK Modulation to Increase Power Efficiency in Gaussian-Noise-Limited Channel

open access: yesIEEE Access, 2021
In this paper we address hybrid probabilistic-geometric constellation shaping (HCS) of amplitude phase shift keying (APSK) constellation based on the reversed model of optimal companding quantization for circularly symmetric sources with the goal to ...
Aleksandra Z. Jovanovic   +3 more
doaj   +1 more source

Mutual Interference of Automotive OFDM Radars—Analysis and Countermeasures

open access: yesIEEE Journal of Microwaves, 2021
Due to its noise-like signal property, digital orthogonal frequency-division multiplexing (OFDM) radars are often assumed to be robust against interference.
Benedikt Schweizer   +4 more
doaj   +1 more source

Modulation techniques for data superposition on amplitude-modulated signals [PDF]

open access: yes, 1983
Double-sideband amplitude-modulation is widely used because of its simplicity in transmission and reception, but in a number of applications the inclusion of a data channel has become an additional requirement.
Al-Jalili, Yazan Othman Ahmad
core   +4 more sources

Video Sequence Segmentation Based on K-Means in Air-Gap Data Transmission for a Cluttered Environment

open access: yesSensors, 2023
An air gap is a technique that increases the security of information systems. The use of unconventional communication channels allows for obtaining communication that is of interest to the attacker as well as to cybersecurity engineers.
Przemyslaw Mazurek, Dawid Bak
doaj   +1 more source

Spectral characterisation of the dicode PPM format [PDF]

open access: yes, 2005
Dicode pulse position modulation (PPM) is a new modulation format that offers improved sensitivity over digital PPM but at a reduced line-rate. This Letter considers, for the first time, the spectral characterisation of the dicode PPM modulation format ...
Cryan, R.A.
core   +1 more source

Automotive Radar — From First Efforts to Future Systems

open access: yesIEEE Journal of Microwaves, 2021
Although the beginning of research on automotive radar sensors goes back to the 1960s, automotive radar has remained one of the main drivers of innovation in millimeter wave technology over the past two decades.
Christian Waldschmidt   +2 more
doaj   +1 more source

Performance Comparison between DPSK and OQPSK modulation approaches in multi environments channels with Matlab Simulink models

open access: yesWasit Journal of Engineering Sciences, 2019
Phase shift keying modulation approaches are widely used in the communication industry. Differential phase shift keying (DPSK) and Offset Quadrature phase shift keying (OQPSK) schemes are chosen to be investigated is multi environment channels, where ...
Fatima faydhe Al- Azzawi   +2 more
doaj   +1 more source

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