Convolutional codes have been widely used in DS-CDMA systems for good performance and relatively low decoding complexity. In this article we, starting from the theoretical point, study the performance of convolutional codes in an environment where E/sub b//N/sub 0/ changes sinusoidally. We study four cases of this scenario. For each case we obtain some conclusions and give their analysis. In this article a very important characteristic, named additivity, is acquired.
['Jian Gu', 'Daecheng Yang']
Variability study for 3G and beyond mobile communications