This paper presents a novel technique for cross-layer adaptive modulation and coding, suited for bit interleaved turbo-coded OFDM packet transmission, and aimed at maximizing the goodput (i.e., the number of data bits delivered without error per unit of time). The optimization problem is formalized through an accurate modeling on the link performance, and a greedy iterative solution is derived. Simulation results demonstrate that performance improvement provided by the proposed method amount to 4 dB with respect to static transmission and about 1.2 dB with respect to adaptive transmission with uniform bit allocation.
|Titolo:||Resource Allocation in OFDMA Underlay Cognitive Radio Systems Based on Ant Colony Optimization|
GIANNETTI, FILIPPO (Co-primo)
LOTTICI, VINCENZO (Co-primo)
|Anno del prodotto:||2010|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|