Abstract
The paper presents a model for a semi-analytic performance evaluation in M-QAM-orthogonal frequency division multiplexing (OFDM) digital radio systems in the presence of an additive white gaussian (AWGN) transmission channel and distortions due to a high power amplifier (HPA). It is shown that, in the case of an OFDM system with a large number of sub-carriers, the distortion on the received symbol caused by the amplifier can be modelled, with negligible error, as a Gaussian noise added to the received symbol. Considering this important remark the semi-analytical approach is only used to estimate means and variances of the nonlinear noise while these estimated parameters are subsequently used to evaluate the system bit error rate (BER) in a closed form. The advantage of this proposed method is that it strongly reduces the computational time. The proposed procedure is applied to evaluate M-QAM-OFDM performance in presence of distortions due to high power amplifiers.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
