Intercarrier Interference of Various Pulse Shaping Functions Used in OFDM Systems with Carrier Frequency Offset

For orthogonal frequency-division multiplexing (OFDM) communication systems, the frequency offsets in mobile radio channels distort the orthogonality between subcarriers resulting in intercarrier interference (ICI). This paper is focused on the problem of reducing the intercarrier-interference (ICI), signal to noise ratio and improved performance in the transmission over OFDM using various pulse shaping methods. Here we have performed a detailed performance comparison of various pulse shaping functions used in OFDM Communication Systems with Carrier Frequency Offset. They appear to be suitable for transmission in OFDM systems with carrier frequency offset. The results obtained by analysis show that the performance improvement over conventional pulse shapes, are significant for reducing average intercarrier-interference (ICI) power and increased ratio of average signal power to average ICI power (SIR). BER performance comparison of all pulse shapes in OFDM system showing better performance by Improved sinc power pulse KeywordsOFDM; ICI; SIR; ISI;BER;SNR; Pulse shaping; Carrier frequency offset