Exact Capture Probability Analysis of GSC Receivers over Rayleigh Fading Channel
| Autor: | Sung Sik Nam, Mazen O. Hasna, Mohamed-Slim Alouini |
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| Rok vydání: | 2010 |
| Předmět: |
Independent and identically distributed random variables
Engineering Transmitted signal Signal receivers Fading channels RAKE receiver Performance measure Generalized selection combining RAKE fingers Signal-to-noise ratio RAKE reception Selection combining Electronic engineering Maximal-ratio combining Fading Diversity schemes Probability analysis Probability Rayleigh fading Multipath environments Signal to noise ratio business.industry Performance analysis Rake Order statistics Ultra wide band systems Third generation systems Closed-form expression Rake receiver Joint statistics business Algorithm Multipath propagation |
| Zdroj: | VTC Spring |
| DOI: | 10.1109/vetecs.2010.5493914 |
| Popis: | For third generation systems and ultrawideband systems, RAKE receivers have been introduced due to the advantage of RAKE receivers which is their ability to combine different replicas of the transmitted signal arriving at different delays in a rich multipath environment. In principle, RAKE receivers combine all resolvable paths which gives the best performance in a rich diversity environment. However, this is usually costly in terms of hardware required as the number of RAKE fingers increases. Therefore, generalized selection combining (GSC) RAKE reception was proposed and has been studied by many researcher as an alternative to the classical two fundamental diversity schemes: maximal ratio combining and selection combining. Previous work on performance analyses of GSC RAKE receivers based on the signal to noise ratio focused on the development of methodologies to derive exact closedform expressions for various performance measures. However, the remaining set of uncombined paths affect the overall performance both in terms of loss in power. Therefore, to have a full understanding of the performance of GSC RAKE receivers, we introduce in this paper the notion of capture probability, which is defined as the ratio of the captured power (essentially combined paths power) to that of the total available power. The major difficulty in these problems is to derive some joint statistics of ordered exponential variates. With this motivation in mind, we capitalize in this paper on some new order statistics results to derive exact closed-form expressions for the capture probability over independent and identically distributed Rayleigh fading channels. Scopus |
| Databáze: | OpenAIRE |
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