Fundamentals of wireless communication
Fundamentals of wireless communication
Cross-layer optimization for OFDM wireless networks-part I: theoretical framework
IEEE Transactions on Wireless Communications
Cross-layer optimization for OFDM wireless networks-part II: algorithm development
IEEE Transactions on Wireless Communications
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In this paper, we propose an adaptive power allocation method for an orthogonal frequency division multiple access (OFDMA) system that employs an adaptive modulation and coding (AMC) scheme. Unlike the water-filling scheme that has been aimed to maximize a continuous capacity function, the proposed scheme is to maximize a discrete capacity function that more precisely characterizes the discrete AMC levels. In terms of complexity, numerical results show that the proposed scheme reduces the processing time by more than 80% comparing with greedy adaptive power allocation (APA), and shows as same performance as greedy APA.