It is well-known that the complexity of iterative decoding of Turbo codes can be greatly reduced by applying an appropriate stopping criterion, instead of performing a fixed number of iterations. Existing stopping criteria are almost always applied after every iteration. While these criteria are very efficient for large frame sizes, they are not necessarily the best for small frame sizes. In this paper, we investigate how conventional stopping criteria can be enhanced for iterative decoding of short-frame Turbo codes. In particular, our simulation results demonstrate that compared with the conventional criteria, the enhanced component-based stopping criterion can save about 38.8% on the average number of iterations with negligible performance loss at a bit error rate of 10~(-4) for a rate-1/2 Turbo code with a frame size of 84 information bits.
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