Performance Analysis of Diversity Combining Algorithms in Shadowed Fading Channels

Abstract

A compound fading model incorporating short term fading and shadowing proposed recently is used to analyze the performance of wireless systems employing microscopic diversity to mitigate the effects of flat fading. This model can account for the presence of different levels of fading and shadowing and provide an analytical solution for the probability density function of the signal-to-noise ratio. Using that model, the performances of MRC and SC diversity combining algorithms were studied. The amount fading (AF) following diversity implementation was calculated and it is seen that the decline in the amount of fading is bound by the level of shadowing present, with the MRC providing a larger decrease in the amount of fading than the SC algorithm. The effect on the error rates was studied using the example of the coherent BPSK modem. Results show that the performances of wireless systems can be analyzed using the compound model for the shadowed fading channels.

A Novel MGF Based Analysis of Channel Capacity of Generalized-K Fading With Maximal-Ratio Combining Diversity

“…Therefore, the performance of diversity schemes has recently received considerable research efforts. The diversity combining [9][10][11][12][13] is an effective technique for mitigating the detrimental effects of the multipath fading and shadowing in the wireless mobile channels.…”

An Exact Closed-Form Expression for the BER of Binary Modulations with Dual-Branch Selection over Generalized-K Fading

“…Additionally, error performance analysis of SC systems with independent and identically distributed (i.i.d.) GK fading branches was performed in [11] involving integral form expressions. Further, in [12] the analysis was performed for dual-branch SC citing the difficulty in deriving the expression for the probability density function (PDF).…”

Diversity reception over generalized-K (KG) fading channels

“…Their performance depends on the characteristics of the multipath fading envelopes. Past works concerning diversity over composite fading distributions can be found in [4], [10], [15]- [17]. In [4], the land-mobile satellite channel is modeled as a weighted sum of Ricean and Suzuki distributions and performance evaluation results for M -ary phase shift keying (PSK) and M -ary differential phase shift keying (DPSK) with micro-diversity reception have been presented.…”

“…In [16], upper bounds for the bit error outage in Rayleigh fading and Nakagami shadowing were obtained. In a very recent paper [17] 1 , the performance of SC and MRC was evaluated for the K G fading channel. However, the results presented in [17] are limited as only the amount of fading (AoF) and the ABEP of BPSK, in terms of integral representation, have been derived.…”

“…In a very recent paper [17] 1 , the performance of SC and MRC was evaluated for the K G fading channel. However, the results presented in [17] are limited as only the amount of fading (AoF) and the ABEP of BPSK, in terms of integral representation, have been derived. Hence, to the best of our knowledge, a thorough performance analysis for the various diversity receivers over K G fading channels has not yet been published in the open technical literature.…”