Spreading and coding trade-offs in DS-CDMA are discussed in
S. Verdu and S. Shamai, "Spectral Efficiency of CDMA with Random
Spreading," IEEE Trans. on Information Theory
, March 1999.
A discussion of OFDM can be found in Section 3.4.3 and Section 4.4
of Tse and ViswanathAn overview of Network information theory can be found in chapter
T. Cover and J. Thomas, Elements of Informaiton Theory, Wiley, 1991.