Resource allocation for the wire-tap multi-carrier broadcast channel

Abstract

Resource allocation for the multi-carrier broadcast channel is well understood for a broad class of utility functions, under various quality-of-service constraints, and for different channel models. In this work, we also take security on the physical layer into account. We use the secrecy rate as the objective function for resource allocation and show the similarities and differences to the traditional power and sub-carrier allocations for sum capacity optimization. The sub-carrier selection is similar for both methods whereas the spectral power allocation shows different behavior. Finally, we demonstrate that rich multipath fading decreases the cost of security. All results are illustrated by numerical simulations and discussions.

Energy harvesting for secure OFDMA systems

“…A great deal of studies have been devoted to informationtheoretic physical-layer security [1]- [5], In [1], [2], resource allocation for physical-layer security considerations was studied for multicarrier and multiple input multiple output (MIMO) systems. In [3], artificial noise was introduced in physicallayer security to obtain better performance in symmetric Gaussian interference channel.…”

Secrecy on the Physical Layer in Wireless Networks

“…The proof is based on the necessary Karush-Kuhn-Tucker (KKT) optimality conditions (Jorswieck & Wolf, 2008). Furthermore, it was shown that the remaining optimization problem…”

“…In (Jorswieck & Wolf, 2008), it was shown that it is optimal to support only the best user per carrier. From that fact and the power constraint P A ℓ = P B ℓ + P E ℓ per carrier follows the user allocation per carrier, which is…”

Power Allocation and Partner Selection for Physical Layer Security in OFDM Wireless Networks

“…The secrecy capacity of OFDM system was analyzed in the condition of eavesdropping end with different receiver in literature [2][3]. The literature [4] studied how the secrecy rate of OFDM system could reach the maximum through the reasonable power allocation. In [5], two practical physical layer security schemes for the MIMO orthogonal frequency-division multiplexing systems were proposed.…”