In this paper, multilevel coded asymmetric modulation with multistage decoding and unequal error protection (UEP) is discussed. These results further emphasize the fact that unconventional signal set partitionings with asymmetric constellations are more promising than traditional (Ungerboeck-type) partitionings, to achieve unequal error protection capabilities with multilevel coding and multist...

This is the second part of a two-part series of papers, where the error performance of multidimensional lattice constellations with signal space diversity (SSD) is investigated. In Part I, following a novel combinatorial geometrical approach which is based on parallelotope geometry, we have presented an exact analytical expression and two closed-form bounds for the symbol error probability (SEP...

Multiple antennas can greatly increase the data rate and reliability of a wireless communication link in a fading environment, but the practical success of using multiple antennas depends crucially on our ability to design high-rate space–time constellations with low encoding and decoding complexity. It has been shown that full transmitter diversity, where the constellation is a set of unitary ...

in the present work, we have obtained the equation of state for neutron star matter considering the in uence of the ferromagnetic and antiferromagnetic spin state. we have also investigated the structure of neutron stars. according to our results, the spin asymmetry stiens the equation of state and leads to high mass for the neutron star.

We consider multiple-antenna communication systems in Rayleigh fading channel, where the transmitter does not know the channel coefficients and the receiver has only an estimate of them. We further assume that the transmitter and receiver know the statistics of the estimation error. We refer to this system as partially coherent system, for which we derive the expressions for the optimal detecto...

Abstract In the past, Sundanese farmers of West Java, Indonesia, managed wet-rice ( sawah ) farming using pranata mangsa , traditional ecological calendar. They cultivated rice varieties that were adapted to local environmental conditions. The helped in determining appropriate time undertake activities, including preparation land, planting, and harvesting. All these activities accompanied by ce...

Fungi belonging to the genus Geastrum are known as earth stars due to different layers with specific alignment in fruit-bodies. In this paper four species of the genus Geastrum viz. G. coronatum, G. rufescens, G. saccatum and G. schmidelii were reported as new for Iran. Previously reported specimen, G. corollinum (as G. recolligens)was newly collected and was studied in details. Newly reported ...

Many Transmission Control Protocol (TCP) versions have been proposed for terrestrial wired networks over the Internet Protocol (IP), e.g. Tahoe and Reno. TCP/IP is being studied to overcome its limitations within the satellite medium and to allow its efficient use in hybrid terrestrial/satellite networks. So far studies have been mainly directed to the use of Geostationary Earth Orbit (GEO) con...