Results 11 to 20 of about 76,758 (254)
Elektronika ir Elektrotechnika, 2018 In this work, we have analysed the performance of a low density parity check (LDPC) coded Amplify and forward (AF) based asynchronous distributed space time block coded (ADSTBC) cooperative system. The proposed concatenated LDPC-ADSTBC is delay tolerant,
Varsha Vimal Sood +2 more
doaj +1 more source
Matching solid shapes in arbitrary dimension via random sampling [PDF]
Discrete Mathematics & Theoretical Computer Science, 2012 We give simple probabilistic algorithms that approximately maximize the volume of overlap of two solid, i.e. full-dimensional, shapes under translations and rigid motions. The shapes are subsets of $ℝ^d$ where $d≥ 2$.
Daria Schymura
doaj +1 more source
Pairwise error probability of space–time codes for a keyhole channel
IET Communications, 2007 A closed-form upper bound is presented for the average pairwise error probabilities (PEP) of space-time codes for a keyhole channel. It is derived from the exact conditional PEP for given fading channel coefficients using a moment generating function-based approach.
Terasan Niyomsataya +2 more
openaire +1 more source
Pairwise Error Probability of Non-Orthogonal Multiple Access with I/Q Imbalance [PDF]
2019 UK/ China Emerging Technologies (UCET), 2019 In this paper, we investigate the performance of a NOMA system under the effect of in-phase/quadrature-phase imbalance (IQI) over Rayleigh fading channels. Specifically, a closed-form pairwise error probability (PEP) expression for the underlying NOMA scenario is derived, which is subsequently utilized to analyze the achievable diversity order of NOMA ...
Lina Bariah +5 more
openaire +2 more sources
IEEE Access, 2017 Recent studies have proven the potential of orthogonal frequency division multiplexing with index modulation in improving the bit error rate performance and the spectral efficiency, where its performance is evaluated under the assumption of ideal ...
Asma Bouhlel +3 more
doaj +1 more source
New Design of Constellation and Bit Mapping for Dual Mode OFDM-IM
IEEE Access, 2019 Dual mode orthogonal frequency division multiplexing with index modulation (DM-OFDM-IM) is recently proposed, where the subcarriers within each subblock are divided into two groups, which are modulated by two distinguishable signal constellations.
Kee-Hoon Kim, Hosung Park
doaj +1 more source
New space-time block codes from spectral norm.
PLoS ONE, 2019 Current research proposes a natural environment for space-time codes and a new design criterion is obtained for space-time block codes in multi-antenna communication channels.
Carlos A R Martins +2 more
doaj +1 more source
Performance Analysis and Constellation Design for the Parallel Quadrature Spatial Modulation
Entropy, 2020 Spatial modulation (SM) is a multiple-input multiple-output (MIMO) technique that achieves a MIMO capacity by conveying information through antenna indices, while keeping the transmitter as simple as that of a single-input system.
Manar Mohaisen +2 more
doaj +1 more source
On the performance of improved quadrature spatial modulation
ETRI Journal, 2020 Quadrature spatial modulation (QSM) utilizes the in‐phase and quadrature spatial dimensions to transmit the real and imaginary parts of a single signal symbol, respectively.
Tasnim Holoubi +3 more
doaj +1 more source
Pairwise Error Probability of Space-Time Codes in Rician–Nakagami Channels [PDF]
IEEE Communications Letters, 2004 In this letter, we investigate the shadowing effect on the performance of space-time codes, using the Rician-Nakagami channel model which has been recently introduced. Specifically, we derive an exact expression for the pairwise error probability (PEP) of space-time trellis codes over the Rician-Nakagami channel, which is in the form of a simple single
openaire +1 more source