Trellis codes (including convolutional codes and turbo codes) have been widely used in DS-CDMA systems for their good performance. In this paper we study the performance of convolutional codes and turbo codes in an environment where E/sub b//N/sub 0/ changes sinusoidally. We study four cases of both scenarios. For each case we obtain some conclusions and give their analysis. In this paper a very important characteristic, named additivity, is acquired.
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机译：Grellis代码（包括卷积码和Turbo代码）已广泛用于DS-CDMA系统，以实现良好的性能。在本文中，我们研究了在E / SUB B // N / SUB 0 /变化正弦的环境中的卷积码和Turbo代码的性能。我们研究了这两种情况的四个案例。对于每种情况，我们得出一些结论并发出分析。在本文中，获取了一个非常重要的特征，命名添加性。
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