
Spectrum and Energy Efficiency Analysis of Relay-Assisted Systems 69
Wyner-Ziv coding is an efficient method for compressing correlated con-
tinuous sources which are separately located [43–44]. It is an extension of the
work of Slepian and Wolf in [45], where discrete distributed source coding is
investigated. Although the details of distributed coding might help the readers
better understand the compression mechanism in CF, it is out of the scope of
this book and interested readers can refer to [43–44] for in-depth knowledge.
It has been pointed out that nested multi-dimensional lattice code can be
used for Wyner-Ziv coding [46–47]. However, nested