A recently proposed scheme for calculating E-shell ionization cross sections in atoms and molecules using the relaxed-core Hartree-Pock (RCHF) approximation is extended to the treatment of shakeup processes. As an example, this scheme is applied to the m-~* satellites in the C ls photoelectron spectrum of CO. These results for the (SO, S1) pair of ~-~* satellite states reveal strong interferenc...

This paper proposes a two-step method to maximize the goodput transmitted by the base station in multiuser orthogonal frequency division multiplexing systems based on subchannel, bit and power allocation. The problem is formulated as a binary integer programming (BIP) problem, in which the utility function to be optimized is modified with a fairness parameter. The application of the proposed me...

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 this paper, a novel wireless transmission system is proposed. The system is composed of two cascaded subsystem: an inner filtered multitone (FMT) modulator with transmission over multiple antennas, and an outer Single carrier cyclic prefix (SCCP) system. The FMT modulator can efficiently avoid the inter-carrier interference, and with multiple antennas the cyclic delay diversity (CDD) can inc...

This paper proposes novel space-time-frequency (STF) coding for multiantenna orthogonal frequency-division multiplexing (OFDM) transmissions over frequency-selective Rayleigh fading channels. Incorporating subchannel grouping and choosing appropriate system parameters, we first convert our system into a set of group STF (GSTF) systems. This enables simplification of STF coding within each GSTF ...