Spectral efficiency of adaptive OFDM systems over high mobility Nakagami-m fading channels

Spectral efficiency of adaptive OFDM systems over high mobility Nakagami-m fading channels

Blog Article

In this paper, blackmores ache relief focus review we investigate the impact of rate and power adaptation (RPA) and rate adaptation (RA) using square M-ary quadrature amplitude modulation (MQAM) on the average spectral efficiency (ASE) of orthogonal frequency division multiplexing (OFDM) systems under instantaneous bit-error-rate (BER) constraint over high mobility Nakagami multipath fading (NMF) channels.Especially, the closed-form expressions for the average spectral efficiency (ASE) of RPA and RA are obtained when these adaptive schemes are used over NMF channels with existence inter-copyright interference (ICI) caused by the high mobility.By comparing the ASE of RPA and spidertattooz.com RA under different number of subcarriers, a simplified rate and subcarriers bandwidth adaptation (RSBA) algorithm is obtained.

Simulation results indicate that RSBA is more suitable for high-speed communication environment than RA.