Abstract
Non-Orthogonal Frequency Division Multiplexing (N-OFDM) remains to be a promising digital modulation technique for high-data-rate wireless transmission. This research is focused on the efficiency analysis of a technique for data frames time synchronization in a white noise communication channel and on an optimal demodulation in the N-OFDM system. N-OFDM signals are generated using the Hartley transform and the Cauchy method is applied for the evaluation signal amplitude the demodulation procedure. The peak-to-average power ratio (PAPR) for different frequency spacing between N-OFDM subcarriers is analyzed. As a result, the mathematical expression for the subcarrier initial phase over subcarrier frequency is derived that allows calculating initial phase with the minimum of PAPR. The paper contains experimental results confirming the operability of the proposed time synchronization scheme. In the experiment, bit error rate estimation was performed for various spacing frequencies and signal-to-noise ratio in the range from 0 to 25 dB. The experimental results have shown the opportunity of PAPR reduction through the calculation of reasonable initial phase for each subcarrier. The experiment was based on simulation in MATLAB with the use of a sound card of a personal computer.
Published Version (
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