Results 31 to 40 of about 44,063 (255)

Cooperative Relay Broadcast Channels [PDF]

, 2005
The capacity regions are investigated for two relay broadcast channels (RBCs), where relay links are incorporated into standard two-user broadcast channels to support user cooperation.
Liang, Yingbin, Veeravalli, Venugopal V.
core   +4 more sources

Socioeconomic Implications of Water Pollution in an Urban Environment A Case Study in Meda Ela Catchment, Kandy, Sri Lanka

Tropical Agricultural Research, 2011
Meda Ela is a tributary of Mahaweli river. It has a complex catchment area with diverse type of land uses including densely populated urban areas. With urbanization and population pressure, Meda Ela is increasingly getting polluted due to direct disposal
AWGN Abeygunawardane, NDK Dayawansa, S Pathmarajha   +2 more
doaj   +1 more source

Design and Analysis of Grouping Active Subcarrier Frequency-Time Index Modulation for Differential Chaos Shift Keying Communication System

Journal of Communications Software and Systems
In this paper, an innovative system called grouping frequency-time index modulation-based differential chaos shift keying (GFTIM-DCSK-I) is presented to improve the energy efficiency (EE), spectral efficiency, and data rate of the recently proposed ...
Ruaa Abdulkareem Yaseen, Fadhil S. Hasan
doaj   +1 more source

A Model of OFDM based Maritime VHF Communication System for Data Exchange

Polish Maritime Research, 2018
In the maritime Very High Frequency (VHF) band, there are no systems for transmitting large amounts of data. Therefore, it is necessary to develop new systems that would modernize the Global Maritime Distress and Safety System (GMDSS), significantly ...
Valčić Sanjin, Pogány Tibor, Mrak Zoran   +2 more
doaj   +1 more source

Coding in the Finite-Blocklength Regime: Bounds based on Laplace Integrals and their Asymptotic Approximations

, 2016
In this paper we provide new compact integral expressions and associated simple asymptotic approximations for converse and achievability bounds in the finite blocklength regime.
Erseghe, Tomaso
core   +1 more source

Signal Detection for QPSK Based Cognitive Radio Systems using Support Vector Machines [PDF]

, 2015
Cognitive radio based network enables opportunistic dynamic spectrum access by sensing, adopting and utilizing the unused portion of licensed spectrum bands.
Khan, I., Khan, M. S., Koudelka, O., Mushtaq, M. T.   +3 more
core   +2 more sources

Resource-Efficient Fusion over Fading and Non-Fading Reporting Channels for Cooperative Spectrum Sensing

Sensors, 2015
Recently, a novel resource-efficient technique for the reporting channel transmissions in cooperative spectrum sensing was proposed. In this technique, secondary users are allowed to simultaneously send their local decisions to the fusion center, saving ...
Dayan Adionel Guimarães, Guilherme Pedro Aquino   +1 more
doaj   +1 more source

Performance Analysis of Bipolar Optical Code Division Multiple Access with Dual Electro-Optical Modulator Scheme for Free-Space Optical Communication

Techne, 2021
In this study, the performance of bipolar optical code division multiple access (OCDMA) with dual electro-optical modulator (EOM) scheme for multi-user scenario was tested and analyzed with OptiSystem version 10.
Eddy Wijanto
doaj   +1 more source

The Method of Types for the AWGN Channel. [PDF]

Entropy (Basel)
For the discrete-time AWGN channel with a power constraint, we give an alternative derivation for the sphere-packing upper bound on the optimal block error exponent and an alternative derivation for the analogous lower bound on the optimal correct-decoding exponent. The derivations use the method of types with finite alphabets of sizes depending on the
Tridenski S, Somekh-Baruch A.
europepmc   +4 more sources

Covert communication with finite blocklength in AWGN channels [PDF]

2017 IEEE International Conference on Communications (ICC), 2017
Accepted by IEEE ICC ...
Yan, Shihao, He, Biao, Cong, Yirui, Zhou, Xiangyun   +3 more
openaire   +2 more sources