this paper uses a multivariate garch model to simultaneously estimate the mean and conditional variance using daily returns among different tehran sector indexes from tir 1386 to tir 1391. since different financial assets are traded based on these sector indexes, it is important for financial market participants to understand the volatility transmission mechanism over time and across sectors in...

In this paper, we propose a power allocation scheme for non-orthogonal multiple access (NOMA) in underwater acoustic sensor networks (UWASNs). The existing terrestrial sum-rate maximization (SRM) power allocation scheme suffers from the degradation of the overall sum-rate in UWASNs due to wasteful resource created by unequal transmission times between each transmission path. To address this iss...

M.Padmaja, K.Prasuna Assistant Professor, VR Siddhartha Engineering College, Vijayawada (A.P), INDIA [email protected] Assistant Professor, Vijaya Institute of Technologyforwomen, Vijayawada (A.P), INDIA [email protected] AbstractOptimized root mean square error plays an important role in the analysis of wireless transmission. In this paper, an optimized power allocation method is con...

M.Padmaja , K.Prasuna 2 Assistant Professor, VR Siddhartha Engineering College, Vijayawada (A.P), INDIA [email protected] Assistant Professor, Vijaya Institute of Technologyforwomen, Vijayawada (A.P), INDIA [email protected] AbstractOptimized root mean square error plays an important role in the analysis of wireless transmission. In this paper, an optimized power allocation method is ...

The Multi-Carrier Code Division Multiple Access (MC-CDMA) is becoming a very significant downlink multiple access technique for high-rate data transmission in the fourth generation wireless communication systems. By means of efficient resource allocation higher data rate i.e. throughput can be achieved. This paper evaluates the performance of group (subchannel) allocation criteria employed in d...

In an underwater acoustic channel, the propagation conditions are known to vary in time, causing the deviation of the received signal strength from the nominal value predicted by a deterministic propagation model. To facilitate a large-scale system design in such conditions (e.g., power allocation), we have developed a statistical propagation model in which the transmission loss is treated as a...