in this paper, the coupled dispersive (2+1)-dimensional long wave equation is studied. the traveling wave hypothesis yields complexiton solutions. subsequently, the wave equation is studied with power law nonlinearity where the ansatz method is applied to yield solitary wave solutions. the constraint conditions for the existence of solitons naturally fall out of the derivation of the soliton so...

In this paper, the Gaussian source quantization is done by using three different quantization methods[1,2]. The Gaussian source is an optimal information source, with average power as a constraint. We analyzed Pulse Amplitude Modulation (PAM) signal constellation obtained by means of different quantization methods for Gaussian channel. We quantized the Gaussian source applying the method given ...

The leakage power consumption increases with the scaling of the devices and it is expected that the leakage power consumption is important design constraint of total power consumption. In this proposed work , a new configuration of level shifter for low power high speed application has been presented. The proposed circuit have no cross coupled connection, by which there will be reduction in del...

1 Information-theoretic limits of fading channels have been discussed extensively in the literature under average power constraints. In this paper, we introduce total energy constraints on transmission and study dynamic power control on a time varying channel. Three types of delay constraints are discussed: no delay constraint, soft delay constraint and strict delay constraint. We consider a bl...

This paper studies optimal power allocation to minimize symbol error rate (SER) of amplify-and-forward cooperative diversity networks. First, we analytically solve optimal power allocation problem to minimize SER for three different scenarios, namely, multi-branch single-relay, single-branch multi-relay and multi-branch multi-relay cooperative diversity networks, all subject to a given total re...

We determine the ultimate classical information capacity of a linear time-invariant bosonic channel with additive phase-insensitive Gaussian noise. This channel can model fiber-optic communication at power levels below the threshold for significant nonlinear effects. We provide a general continuous-time result that gives the ultimate capacity for such a channel operating in the quasimonochromat...

In this paper we consider the problem of transmitting packets over a point to point wireless link where the objective is to minimize the average transmitted power subject to a constraint on the average packet delay and drop rate. We propose an online algorithm based on a novel post-decision state based framework and two timescale stochastic approximation technique. We argue that the algorithm i...

In the spectrum-sharing technology, a secondary user may utilize the primary user’s licensed band as long as its interference to the primary user is below a tolerable value. In this paper, we consider a scenario in which a secondary user is operating in the presence of both a primary user and an eavesdropper. Hence, the secondary user has both interference limitations and security consideration...

For wireless data traffic, energy efficiency can be improved by adapting the transmission power and rate over time based on the offered traffic as well as any channel state information. In this context, a variety of transmission scheduling approaches have been studied including [1, 2, 3]. These approaches attempt to manage the fundamental trade-off between packet delay and transmission power or...