The performance of a class of generalized-selection combining (GSC) receivers operating over independent but nonidentically distributedWeibull fading channels is studied.We consider the case where the two branches with the largest instantaneous signal-to-noise ratio (SNR), from a total of L available, GSC(2, L) are selected. By introducing a novel property for the product of moments of ordered Weibull random variables, convenient closed form expressions for the moments of the GSC(2,L) outputSNRare derived. Using these expressions, important performance criteria, such as average output SNR and amount of fading, are obtained in closed form. Furthermore, employing the Pade´approximants theory and themoment-generating function approach, outage and bit-error rate performance are studied. An attempt is also made to identify the equivalency between the Weibull and the Rice fading channel, which is typically used to model the mobile satellite channel. We present various numerical performance evaluation results for different modulation formats and channel conditions. These results are complemented by equivalent computer simulated resultswhich validate the accuracy of the proposed analysis.
Performance Analysis of a Class of GSC Receivers over Nonidentical Weibull Fading Channels / P. S. Bithas ; G. K. Karagiannidis; N. C. Sagias; P. T. Mathiopoulus; S.A. Kotsopoulos; G. E. Corazza. - In: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY. - ISSN 0018-9545. - STAMPA. - 54-6:(2005), pp. 1963-1970. [10.1109/TVT.2005.858194]
Performance Analysis of a Class of GSC Receivers over Nonidentical Weibull Fading Channels
CORAZZA, GIOVANNI EMANUELE
2005
Abstract
The performance of a class of generalized-selection combining (GSC) receivers operating over independent but nonidentically distributedWeibull fading channels is studied.We consider the case where the two branches with the largest instantaneous signal-to-noise ratio (SNR), from a total of L available, GSC(2, L) are selected. By introducing a novel property for the product of moments of ordered Weibull random variables, convenient closed form expressions for the moments of the GSC(2,L) outputSNRare derived. Using these expressions, important performance criteria, such as average output SNR and amount of fading, are obtained in closed form. Furthermore, employing the Pade´approximants theory and themoment-generating function approach, outage and bit-error rate performance are studied. An attempt is also made to identify the equivalency between the Weibull and the Rice fading channel, which is typically used to model the mobile satellite channel. We present various numerical performance evaluation results for different modulation formats and channel conditions. These results are complemented by equivalent computer simulated resultswhich validate the accuracy of the proposed analysis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
