Results 21 to 30 of about 653,662 (247)
Spectrally-Efficient Continuous Phase Modulations [PDF]
2008 IEEE International Symposium on Information Theory, 2008 We investigate the spectral efficiency of continuous phase modulations (CPMs). To this end, we need an effective bandwidth definition for a CPM signal, whose power spectral density has in principle an infinite support. The definition we adopt is based on the spacing between adjacent carriers in a frequency division multiplexed CPM system.
Alan BARBIERI +2 more
openaire +4 more sources
Improving the Spectral Efficiency of OFDM System Using Raised Cosine Filter [PDF]
, 2016 The current research trends towards mobile broadband communications highly focused on mitigating the power spectral analysis and frequency localization issues associated with Orthogonal Frequency Division Multiplexing namely OFDM signals.
Ahmed, R. (Reyaz)
core
Spectral Efficiency of Random Time-Hopping CDMA
, 2015 Traditionally paired with impulsive communications, Time-Hopping CDMA (TH-CDMA) is a multiple access technique that separates users in time by coding their transmissions into pulses occupying a subset of $N_\mathsf{s}$ chips out of the total $N$ included
Di Benedetto, Maria-Gabriella +1 more
core +3 more sources
Characterization of wavelength interleaving in radio-over-fiber systems employing WDM/SCM [PDF]
, 2006 A radio-over-fiber (RoF) distribution system incorporating both sub-carrier multiplexing and wavelength division multiplexing (WDM) technologies is presented. This signal is directly modulated onto three high-speed lasers.
A. Kaszubowska +10 more
core +1 more source
FEBS Letters, EarlyView.Metabolic dysfunction‐associated steatotic liver disease (MASLD) affects nearly one‐third of the global population and poses a significant risk of progression to cirrhosis or liver cancer. Here, we discuss the roles of hepatic dendritic cell subtypes in MASLD, highlighting their distinct contributions to disease initiation and progression, and their ...
Camilla Klaimi +3 more
wiley +1 more source
Impact of Spectrum Sharing on the Efficiency of Faster-Than-Nyquist Signaling
, 2014 Capacity computations are presented for Faster-Than-Nyquist (FTN) signaling in the presence of interference from neighboring frequency bands. It is shown that Shannon's sinc pulses maximize the spectral efficiency for a multi-access channel, where ...
Hefnawy, Marwa El, Kramer, Gerhard
core +1 more source
Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia
FEBS Letters, EarlyView.This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley +1 more source
ACM Transactions on Graphics, 2019 We present a simple and efficient method for refining maps or correspondences by iterative upsampling in the spectral domain that can be implemented in a few lines of code. Our main observation is that high quality maps can be obtained even if the input correspondences are noisy or are encoded by a small number of coefficients in a spectral basis.
Melzi, Simone +5 more
openaire +6 more sources
Spectral Efficiency of Mixed-ADC Massive MIMO
, 2018 We study the spectral efficiency (SE) of a mixed-ADC massive MIMO system in which K single-antenna users communicate with a base station (BS) equipped with M antennas connected to N high-resolution ADCs and M-N one-bit ADCs.
Pirzadeh, Hessam, Swindlehurst, A. Lee
core +1 more source
On the energy efficiency-spectral efficiency trade-off over the MIMO rayleigh fading channel [PDF]
, 2012 Along with spectral efficiency (SE), energy efficiency (EE) is becoming one of the key performance evaluation criteria for communication system. These two criteria, which are conflicting, can be linked through their trade-off. The EE-SE trade-off for the
Héliot, Fabien +2 more
core +1 more source