Multiuser Diversity With Adaptive Modulation in Non-Identically Distributed Nakagami Fading Environments

作者：Rao Anlei^*; Alouini Mohamed Slim

来源：IEEE Transactions on Vehicular Technology, 2012, 61(3): 1439-1444.

DOI：10.1109/TVT.2012.2185965

• Adaptive modulation
• multiuser diversity
• Nakagami fading

In this paper, we analyze the performance of adaptive modulation with single-cell multiuser scheduling over independent but not identical distributed (i.n.i.d.) Nakagami fading channels. Closed-form expressions are derived for the average channel capacity, spectral efficiency, and bit error rate (BER) for both constant-power variable-rate and variable-power variable-rate uncoded/coded M-ary quadrature amplitude modulation (M-QAM) schemes. We also study the impact of time delay on the average BER of adaptive M-QAM. Selected numerical results show that the multiuser diversity brings considerably better performance, even over i.n.i.d. fading environments.

• 出版日期2012-3