Description

Wireless communication is one of the most active areas of technology development and has become an ever-more important and prominent part of everyday life. Orthogonal Frequency Division Multiplexing System are better suited to the today’s generation 3G networks and upcoming 4G and 5G networks in terms of bandwidth efficiency due to overlapping of frequency bands, high speed data transfer due to parallel data transfer, maintaining high quality of wireless link even under multipath conditions due to low symbol rate it minimizes ICI effects. The application of channel codes like convolution codes further reduces the Bit Error Rate and improves the link reliability. In this work, BER performance of OFDM systems has been evaluated with multipath Rayleigh fading channel and AWGN channel with different levels of M-QAM and M-PSK modulation schemes applied to OFDM. In this work, we consider the problem of equalizing finite-impulse response (FIR) channels in orthogonal frequency-division multiplexing (OFDM) systems, which employ at the receiver a blanking nonlinearity to mitigate impulsive noise (IN). The design of a frequency-domain linear FIR equalizer that compensates for the inter carrier interference (ICI) generated by nonlinear preprocessing is proposed and the model for the IN, allows one to assess the error probability performance of the proposed equalizer.