BER Improvement Using Windowing Technique in OFDM Systems

The principles of Orthogonal Frequency Division Multiplexing (OFDM) modulation have been in existence for several decades. However in recent years the attention towards OFDM has grown rapidly in the field of wireless and wired communication systems because of its advantages. The main problem of OFDM is high Peak to average power ratio (PAPR) which affects the performance and efficiency of high power amplifier used in radio system. PAPR reduction was required for radar and speech synthesis applications. In multicarrier modulation the orthogonality between closely spaced subcarrier is necessary in order to overcome inter-carrier interference (ICI).This ICI reduces the bit error rate (BER) performance of the system. In this Through simulation, we verify that the BER performance improvement can be achieved by the proposed peak windowing method and also give the comparison between the Kaiser and Hamming window techniques through the cumulative distribution function (CCDF) and power spectral density. Index Terms — Orthogonal Frequency Division Multiplexing (OFDM), Peak-To-Average Power Ratio (PAPR), Peak Windowing, Nonlinear Distortion.