A Simple Converse Proof and a Unified Capacity Formula for Channels with Input Constraints

Youjian Liu A Simple Converse Proof and a Unified Capacity Formula for Channels with Input Constraints http://arxiv.org/abs/0807.0042 2008 CoRR abs/0807.0042 db/journals/corr/corr0807.html#abs-0807-0042 informal publication