Using cross-system diversity in heterogeneous networks: Throughput optimization

This paper investigates the situation where a group of terminals can be simultaneously connected to several base stations using distinct technologies on nonoverlapping frequency bands. We introduce and solve the problem of optimal power allocation (in the sense of the ergodic sum-rate) for the terminals in the uplink, using three types of receivers: the optimum receiver, minimum mean square error and matched filters. Key results from random matrix theory allow us to solve the corresponding optimization problems. Simulations validate our approach and illustrate the performance gain obtained by using several technologies simultaneously instead of one at a time. Key words: Heterogeneous networks, cross-system diversity, soft handover, power allocation, random matrix theory, multiple access channel, CDMA, MIMO, OFDM.

• Type: Journal
• Year: 2008
• Where: PE
• Authors: Samson Lasaulce, Alberto Suárez 0002, Raul de Lacerda, Mérouane Debbah
• Keywords: Optimal Power Allocation, Optimization, PE 2008, Power Allocation, Random Matrix Theory