In this two-part paper, we consider the transmission of confidential data over wireless wiretap channels. The first part presents an information-theoretic problem formulation in which two legitimate partners communicate over a quasi-static fading channel and an eavesdropper observes their transmissions through another independent quasi-static fading channel. We define the secrecy capacity in te...

The capacity of MIMO systems under ideal (i.i.d.) channel conditions has been shown to increase linearly with the number of antennas. Capacity scaling is observed in a correlated channel environment as well but the constant of scaling is shown in [7] to be less than that of the i.i.d. scaling factor. Using a channel representation motivated by physical scattering considerations, the virtual cha...

In this paper, a novel unified analytical expression for average bit error rates (ABER) and average channel capacity (ACC) is presented for the – shadowed fading model. This model has recently shown to be suitable for underwater acoustic wireless channel modeling using the measurements conducted by the Naval Research Laboratory [1], and is not so well covered in the public literature. Deploying...

In this paper we investigate the performance of MIMO systems in co-channel interference. We present a way of explicitly examining the effect of interference on the MIMO sub-channel gains. Using this, we derive upper and lower asymptotic bounds on capacity with many interferers and in high interference-to-noise ratio. Simulation results are presented for these bounds and for the performance of M...

There are two kinds of MIMO systems [1], such as spatial multiplexing method and diversity method. To enhance the channel capacity, the space multiplexing method is effective in high SNR environment, while the diversity method is effective in low SNR environment. The channel capacity improvement combining two transmission methods is expected by selecting on appropriate methods depending on the ...

Lapidoth and Moser have recently proposed a general technique for obtaining upper bounds on channel capacity via a dual expression in which the maximization over probability distributions on the channel input alphabet is replaced with a minimization over probability distributions on the channel output alphabet. They have also introduced the notion of “capacity achieving input distributions that...

In this paper we present capacity, envelope correlation coefficient, and condition number statistics obtained from 2x2 Multiple-Input Multiple-Output (MIMO) fixed wireless radio channel measurements using dual-polarized antennas. To calculate the capacity, we assume that the transmitter has no knowledge about the channel. The experimental capacity results are compared to the informationtheoreti...

The goal of this paper is to investigate the effect of channel side information on increasing the achievable rates of continuous power-limited non-Gaussian channels. We focus on the case where (1) there is imperfect channel quality information available to the transmitter and the receiver and (2) while the channel gain is continuously varying, there are few cross-region changes, and the noise c...

The Rayleigh product channel model is useful in capturing the performance degradation due to rank deficiency of MIMO channels. In this paper, such a performance degradation is investigated via the channel outage probability assuming slowly varying channel with delay-constrained decoding. Using techniques of free probability theory, the asymptotic variance of channel capacity is derived when the...