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A group of modulation schemes for adaptive modulation
2008 11th IEEE Singapore International Conference on Communication Systems, 2008Adaptive modulation increases the throughput of a wireless network by adjusting the modulation scheme to the channel status. To have more capacity and more flexibility in using adaptive modulation, our research attempts to find a group of modulation schemes, which includes M-QAM where the number of signal points is not a power of 2, as well as non ...
null Anh Tuan Le, null Kiyomichi Araki
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An adaptive modulation scheme in multicarrier modulation system
Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004., 2005An adaptive modulation scheme is applied in multicarrier modulation system to improve the system spectral efficiency along with unequal error protection (UEP) to meet the different quality of service (QoS) in transmitting data. Power control zone (PCZ) is employed to make the improvement of system performance in terms of average BER or BPS.
null Zhongrui Qi, null Zhenming Gao
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Adaptive modulation vs fixed modulation with deterministic interleaver
2015 Global Conference on Communication Technologies (GCCT), 2015One of the prominent candidate of recent technology is OFDM-IDMA (Orthogonal Frequency Division Multiplexing Interleave Division Multiple Access). IDMA (Interleave Division Multiple Access) inherits most of the advantages of CDMA (Code Division Multiple Access).
A. Mary Juliet, S. Jayashri
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Adaptive modulation system for liquid crystal phase modulator
Chinese Optics Letters, 2016An adaptive modulation system for a liquid crystal (LC) phase modulator is demonstrated. The phase retardation may be modulated by resetting the driving voltage automatically by matching the measured and ideal transmittance of an LC cell sandwiched by crossed polarizers.
Bin Zhang Bin Zhang +3 more
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Concept of Adaptability in Space Modules
Journal of Aerospace Engineering, 1990The space program is aiming towards the permanent use of space; to build and establish an orbital space station, a Moon base and depart to Mars and beyond. We must look after the total independency from the Earth's natural resources and work in the design of a modular space base in which each module is capable of duplicating one natural process, and ...
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Performance of modulation‐level‐controlled adaptive modulation systems
Electronics and Communications in Japan (Part I: Communications), 1996AbstractThe multivalued quadrature amplitude modulation (QAM), such as 16 QAM, is a very useful technique in land mobile communication since a high‐speed transmission can be realized without enlarging the transmission band. The technique has a problem, however, in that it is not robust against the decrease of the received signal level due to fading or ...
Shinya Otsuki +2 more
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Platelet-mediated modulation of adaptive immunity
Seminars in Immunology, 2016Besides being the main cellular effectors of hemostasis, platelets possess a plethora of intracellular mediators (e.g. cytokines, chemokines and antimicrobial molecules) as well as surface receptors (e.g. P-selectin, integrins, CD40L, intercellular adhesion molecule [ICAM]-2, junctional adhesion molecule [JAM]-A, CD44, Toll-like receptors, chemokine ...
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Adaptive and Reconfigurable Modulation
2011This chapter contains sections titled: Coded Modulation Adaptive Coded Modulation for Fading Channels ...
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Adaptive Pulse Width Modulation
2004Many spacecraft attitude control systems use actuators that operate in an on-off mode; typical examples are the jet thrusters, for which the control amplitude cannot be modulated. Moreover, if we want to reduce the complexity of the devices that drive the actuators, as for example in the case of magnetic coils, the on-off input is the simplest signal ...
CURTI, Fabio +2 more
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