Results 71 to 80 of about 31,714 (226)

Self‐Assembly Pathway Influence on Dehydropeptide‐Based Gel Properties and Drug Release

open access: yesMacromolecular Bioscience, Volume 25, Issue 9, September 2025.
In this work, it is explored how the gelation conditions affect the morphology, mechanical properties, and drug release of dehydropeptide‐based gels. The naphthalene‐capped dehydropeptide forms a crystal structure with a pore diameter of ≈4.08 Å. Gelation conditions can influence gel stiffness by nearly three orders of magnitude, in which the assembly ...
Sérgio R. S. Veloso   +11 more
wiley   +1 more source

Software-Defined-Radio-Assisted Adaptive Broadband Frequency Hopping Multicarrier DS-CDMA [PDF]

open access: yes, 2002
Against the backdrop of the explosive expansion of the Internet and the continued dramatic increase in demand for high-speed multimedia wireless services, there is an urgent demand for flexible, bandwidth-efficient transceivers.
Yang, L-L., Hanzo, L.
core  

Asymptotic Performance Analysis of Time-Frequency-Domain Spread MC DS-CDMA Systems Employing MMSE Multiuser Detection [PDF]

open access: yes, 2010
In this contribution the asymptotic signal-to-interference-plus-noise ratio (SINR) performance of multicarrier direct-sequence code-division multiple-access systems employing time-frequency-domain spreading, i.e., of the TF/MC DS-CDMA systems, is studied,
Zhang, Youguang   +5 more
core   +1 more source

A simulation agent for efficient network evaluation in 3G cellular mobile radio planning

open access: yesJournal of Computer Science and Technology, 2009
An accurate procedure for evaluating the strong correlation and conflicting goals of coverage, capacity and Quality of Service (QoS) is required for efficient planning of 3G radio networks.
Joseph Isabona   +2 more
doaj  

Surface Energy and Morphology of Blend Films of Polystyrene and Polybutadiene

open access: yesMacromolecular Chemistry and Physics, Volume 226, Issue 17, September 5, 2025.
Blends of polystyrene and polybutadiene are highly immiscible and, when cast as films, give rise to many different structures. In this work, different experimental techniques realize the complexity of these films. Given the industrial importance of polystyrene and polybutadiene, understanding morphology is important.
Mai S.Y. Ibrahim   +10 more
wiley   +1 more source

Space Time Block Coded Multi-user CDMA Systems over Rayleigh Fading Channel [PDF]

open access: yes, 2008
This paper investigates the performance and capacity of space time block coded (STBC) multi-user CDMA system over Rayleigh fading channel condition using multiple transmit antennas.
Haque, Md. Hasibul   +7 more
core   +1 more source

Accurate BER of MC-DS-CDMA over Rayleigh Fading Channels [PDF]

open access: yes, 2007
In this paper, we derive an accurate average bit error rate (BER) of Rayleigh faded MC-DS-CDMA in the context of asynchronous transmission and random spreading sequences.
Smida, B., Affes, S., Hanzo, L.
core  

The Alamouti Scheme with CDMA-OFDM/OQAM

open access: yesEURASIP Journal on Advances in Signal Processing, 2010
This paper deals with the combination of OFDM/OQAM with the Alamouti scheme. After a brief presentation of the OFDM/OQAM modulation scheme, we introduce the fact that the well-known Alamouti decoding scheme cannot be simply applied to this modulation ...
Pierre Siohan   +2 more
doaj   +1 more source

Design and Simulation of parallel CDMA System Based on 3D-Hadamard Transform

open access: yesDiyala Journal of Engineering Sciences, 2013
Future wireless systems aim to provide higher transmission data rates, improved spectral efficiency and greater capacity. In this paper a spectral efficient two dimensional (2-D) parallel code division multiple access (CDMA) system is proposed for ...
Ali T. Shaheen
doaj   +1 more source

Reverse-Link Performance of Synchronous Cellular DS-CDMA Networks in Dispersive Rician Multipath Fading Channels [PDF]

open access: yes, 2004
In this paper, the reverse-link performance of synchronous DS-CDMA cellular networks is investigated in Rician multipath fading environments. The system’s performance is evaluated in terms of the achievable average bit error rate (BER) and the user ...
Hwang, S-H., Hanzo, L.
core  

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