论文部分内容阅读
Abstract: In this paper, the cell error rete (CER) of a CDMA-based satellite ATM system is analyzed. Two fadingmodels, i. e. the partial fading model and the total fading model are presented according to multi-path propagation fadingand shadow effect. Based on the total shadow model, the relation of CER vs. the number of subscribers at variouselevations under 2D-RAKE receiving and non-diversity receiving is got. The impact on cell error rate with pseudo noise(PN) code length is also considered. The result that the maximum likelihood combination of multi-path signal would notimprove the system performance when multiple access interference (MAI) is small, on the contrary the performance maybe even worse is abtained.
Two fading models, ie the partial fading model and the total fading model are presented according to the multi-path propagation fading and shadow effect. Based on the total shadow model, the relation of CER vs. the number of subscribers at variouselevations under 2D-RAKE receiving and non-diversity receiving is got. The impact on cell error rate with pseudo noise (PN) code length is also considered. result that the maximum likelihood combination of multi-path signal would notimprove the system performance when multiple access interference (MAI) is small, on the contrary the performance the even worse is abtained.