Reduction of Bit Error Rate in Wireless Application using Inter Carrier Interference Technique

Inter Carrier Interference (ICI) is a kind of interference which occurs in the wireless communications. The main cause of this interference is the over lapping of carriers, resulting to the transmission of wrong bits of data. This could significantly increase the bit error rate (BER) in the wireless applications. In order to reduce the BER, several techniques like the use of digital filters, spectrum shaping techniques and cancellation techniques have been developed and applied. Digital filters are used to suppress the ICI by utilizing transition band attenuation and out of band sharp graph drawing that attenuates the signal power on the frequency span where the interference is originating from. Spectrum shaping techniques involve the reduction of the bandwidth of the used signal. This is done by decreasing the roll-off factor or by using higher order modulations. Finally, cancellation techniques are also used for reducing ICI. These techniques are most suitable when partial cancellation can be achieved because of direct detection of the ICI source. Overall, through the implementation of ICI reduction techniques, it can be expected that the BER in the wireless applications can be reduced. This would lead to more reliable and efficient wireless applications.