| Title |
CPP-OFDM (Cyclic Prefix and Postfix) Communication System using Cosine Window Function for the OOB Spectrum Reduction |
| Authors |
박병학(Byounghak Park) ; 유흥균(Heung-Gyoon Ryu) |
| DOI |
https://doi.org/10.5573/ieie.2019.56.8.13 |
| Keywords |
OOB emission; Windowing; CPP-OFDM; Spectral efficiency; Waveform |
| Abstract |
Currently, mobile communication adopts OFDM (Orthogonal Frequency Division Multiplexing) as a core modulation technique. OFDM has an OOB(Out Of Band) Emission. because of high OOB power, OFDM has an inefficient spectral mask. This leads to inefficient placement in frequency allocation.Numerous studies are under way to solve these problems. For example, there are FBMC (Filter Banked Multi-Carrier), UFMC (Universal Filtered Multi-Carrier), WOLA-OFDM (Weighted Overlap and add based OFDM), and F-OFDM (Filtered OFDM). In this paper, OOB power is reduced through the windowing method used in WOLA-OFDM.The windowing is applied without time-domain extension using CPP-OFDM (Cyclic Prefix and Postfix OFDM).In this paper, we propose a new window function with better OOB power. Compared with the best known Hann window, it showed 2dB performance improvement and effectively suppressed ISI(Inter-Symbol Interference) through CPP-OFDM. |