Finally, how to reduce half of the state-complexity of a trellis with one peak is considered and an approach for trellises with 2 to 4 continuous peaks is also given.

• 讨论在网格中含有1个峰值情形下，采用陪集归并法如何将峰值减半，且具体给出网格中含有2到4个连续峰值时如何将峰值减半的方法。