Uplink capacity of self-organizing clustered orthogonal CDMA networks in flat fading channels

Romain Couillet (1) , Merouane Debbah (2)

1 NXP Semiconductors
2 E3S - Supélec Sciences des Systèmes

In this paper, we derive a deterministic equivalent of the Shannon-transform of certain type of large unitary random matrices. This approximation is exploited to evaluate the uplink channel capacity of clustered orthogonal CDMA network. When non-uniform power allocation among the users of each cluster is allowed, we derive an explicit iterative water-filling algorithm which, upon convergence, achieves the multi-user decoding capacity. In particular, we show that, in a self-organizing clustered orthogonal CDMA network, each cluster can optimize its power allocation policy independently of the other clusters at the expense of a small feedback overhead. Simulations corroborate the theoretical derivations.

Domains: Computer Science [cs]; Information Theory [cs.IT]; Mathematics [math]; Information Theory [math.IT]

Romain Couillet, Merouane Debbah. Uplink capacity of self-organizing clustered orthogonal CDMA networks in flat fading channels. ITW-2009, Oct 2009, Italy. 5 p. ⟨hal-00414531⟩