George Chrisikos

MRC performance for M-ary modulation in arbitrarily correlated Nakagami fading channels

We derive the symbol error probability for coherent detection of several types of M-ary modulation schemes using maximal ratio combining. We consider Nakagami fading channels, where the instantaneous signal-to-noise ratios of the diversity branches are not necessarily independent or identically distributed. The proposed problem is made analytically tractable by transforming the correlated physical diversity branches into independent virtual branches.

Higher order statistics of antenna subset diversity

We use a virtual-branch technique to derive higher order statistics of the output signal-to-noise ratio (SNR) of antenna subset diversity in a multipath fading environment. In particular, closed-form expressions of the cumulants, central moments, skewness, and kurtosis for various antenna subset diversity schemes are derived. These measures characterize the statistical behavior of the output SNR distribution.

Canonical expressions for the error probability performance of M-ary modulation with hybrid selection/maximal-ratio combining in Rayleigh fading

Hybrid selection/maximal-ratio combining (H-S/MRC) is a reduced-complexity diversity combining scheme, where L out of N diversity branches (with the largest signal-to-noise ratio (SNR) at each instant) are selected and combined using maximal-ratio combining (MRC). We derive closed-form expressions for the symbol error probability (SEP) of a H-S/MRC diversity system with arbitrary L and N. We consider coherent detection of M-ary phase-shift keying (MPSK) for the case of independent Rayleigh fading with equal SNR averaged over the fading.

Effects of chip rate on selective RAKE combining

The focus of this paper is to characterize the performance of a RAKE receiver tracking the L strongest multipath components and to quantify the effects of the chip rate on spread spectrum systems operating in dense multipath frequency-selective fading environments. Analytical expressions for the symbol error probability are derived in terms of the chip rate, multipath spread of the channel and an arbitrary number of combined paths.

Error probability for M-ary modulation using hybrid selection/maximal-ratio combining in Rayleigh fading

In this paper, we derive exact expressions for the symbol error probability (SEP) of hybrid selection/maximal-ratio combining wireless systems in multipath fading environments. We consider coherent detection of several types of M-ary modulation for the case of independent Rayleigh fading on each diversity branch with equal signal-to-noise ratio averaged over the fading. We use a virtual branch technique which transforms the ordered physical branches, which are necessarily dependent, into independent and identically distributed virtual branches thereby permitting the derivation of exact SEP expressions.

Higher order statistics of the output SNR of hybrid selection/maximal-ratio combining

We use a virtual branch technique to derive higher order statistics of the output signal-to-noise ratio (SNR) of hybrid selection/maximal-ratio combining (H-S/MRC) in a multipath fading environment. In particular, the cumulants, central moments, skewness and kurtosis are derived. We consider the case of independent Rayleigh fading with equal receive SNR averaged over the fading on each diversity branch.