Pareamento de subportadoras, alocação de potência e seleção de modo em redes cooperativas OFDM

Abstract

The fourth generation of mobile communications provides many benefits such as high transmit data rates, low transmit power consumption and reduced latency. Cooperative communication consists in a key concept to those systems that allows the achievement of gains in transmit data rates and reliability. The potential of cooperative communications can be better exploited when this technology is used joinlty with radio resource allocation strategies. In this work we formulate the data rate maximization problem that takes into account subcarrier pairing of OFDM (Orthogonal Frequency Division Multiplexing) subcarriers, transmit power allocation and transmit mode selection (with or without diversity in the receiver). Besides, we also consider a realistic link adaptation model that maps SNR (Signal-to-Noise Ratio) in transmit data rate.