Information Embedding Into IID Signals Facing an AWGN Attack

In this chapter, information embedding into independent identically distributed (IID) data and attacks by additive white Gaussian noise (AWGN) as shown in Fig. 2.4 is considered. For Gaussian data, Costa’s scheme achieves the capacity of this communication scenario. However, Costa’s scheme is not practical. Thus, a suboptimal practical communication scheme based on Costa’s idea is proposed. Its performance and properties are analyzed, and comparisons to other suboptimal implementations of Costa’s scheme are given.