Performance Comparison of MDFT Filter Bank with OFDM in Multi-Carrier Systems

Abstract:

Based on the filter bank, the theory of multi-carrier modulation using Orthogonal Frequency Division Multiplexing (OFDM) and Modified Discrete Fourier Transform (MDFT) filter bank has been discussed and the detailed derivation process has been given. Following these discussions, the actual implementation of MDFT filter bank in multi-carrier modulation systems has been discussed, and then the comparison of their prototype functions, Peak to Average Power Ratio (PAPR) and Symbol Error Rate (SER) are drawn. Experimental results demonstrate that compared with the OFDM system, prototype functions of MDFT have obvious advantage in spectrum leakage. In terms of PAPR, they have similar performance. Whether using QPSK or 16QAM modulation, MDFT is superior to OFDM in symbol error rate as a whole and with increasing of filter length L, the advantage becomes more and more apparent.

• Periodical: Advanced Materials Research (Volumes 926-930)
• Pages: 1822-1826
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.926-930.1822
• Online since: May 2014
• Authors: Ling Zhuang, Ju Ge*, Guang Yu Wang, Kai Shao
• Keywords: Mine Ventilation Gas, Operating Parameter, Orthogonal Test, Reactor Performance

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