Fading distribution

About: Fading distribution is a research topic. Over the lifetime, 5732 publications have been published within this topic receiving 114193 citations.

The Fading Number of Multiple-Input Multiple-Output Fading Channels with Memory

Abstract: The fading number of a general (not necessarily Gaussian) regular multiple-input multiple-output (MIMO) fading channel with arbitrary temporal and spatial memory is derived. The channel is assumed to be non-coherent, i.e., neither receiver nor transmitter have knowledge about the channel state, but they only know the probability law of the fading process. The fading number is the second term in the asymptotic expansion of channel capacity when the signal-to-noise ratio (SNR) tends to infinity. It is shown that the fading number can be achieved by an input that is the product of two independent processes: a stationary and circularly symmetric direction- (or unit-) vector process whose distribution needs to be chosen such that it maximizes the fading number, and a non-negative magnitude process that is independent and identically distributed (IID) and that escapes to infinity. Additionally, in the more general context of an arbitrary stationary channel model satisfying some weak conditions on the channel law, it is shown that the optimal input distribution is stationary apart from some edge effects.

Performance of M-MRC receivers over TWDP fading channels

Abstract: An expression of characteristic function of signal-to-noise ratio (SNR) for two waves with diffused power (TWDP) fading channel is derived. Using this expression, the expression for the probability density function (PDF) of the output SNR of maximal ratio combining (MRC) receiver is obtained. Expressions for the performance matrix of MRC receiver over TWDP fading channels are also deduced. PDF based approach is followed to derive expressions of outage probability and average symbol error rate for coherent and non-coherent m-ary modulation schemes. Effects of the number of branches M and the fading parameters K and Δ on the system performance are studied. The results obtained are verified by Monte Carlo simulation.

The Inverse Gaussian Distribution in Wireless Channels: Second-Order Statistics and Channel Capacity

Abstract: In this paper, we introduce the Inverse Gaussian (IG) fading distribution to model the envelope and the power of the received signal in radio propagation fading channels and free-space optical (FSO) channels. The joint distribution of the IG process and its derivative and the marginal distribution of the derivative are developed. The obtained formulas are then used to derive the second-order statistics of the received signal envelope and the channel capacity under IG and Nakagami-IG (NIG) fading distributions. Numerical results sustaining our analysis are provided, and the impacts of various parameters on the system performance are investigated.

Method for the prediction of the fading performance of a multisection microwave link

Abstract: The paper describes the need for a simple method of predicting the performance of a multisection microwave link. From the results of propagation measurements, a relationship is established between the worst-month fading distribution of a given microwave path, its path length and the roughness of the terrain. This relationship is then used to establish methods of predicting the worst-hour mean thermal noise and the thermal-noise levels exceeded for specified percentages of the worst month for a number of unequal microwave sections in tandem.

Effect of carrier frequency offset on performance of MC-CDMA systems

Abstract: The bit error probability of the downlink of an MC-CDMA system is analysed taking into account the effect of a carrier frequency offset for Rayleigh and Rician fading channels. Derived results show that the performance of an MC-CDMA system is very sensitive even to a relatively small frequency offset.