  Wireless communication is the most effective communication to convey audio or
video information among the population. It enables the masses to connect
throughout the world. Wireless technologies improve the lifestyle of
individuals in rural and poor communication areas. In this view, the quality of
a reliable signal can be enhanced by minimizing carrier interference. In this
paper bit error rate of an image, signal is transmitted over fading channel is
analyzed using orthogonal frequency multiplexing and channel estimation
technique. An Orthogonal Frequency Multiplexing (OFDM) provides prominent
bandwidth effectiveness and improved immunity to the fading environments. In
OFDM, the data is modulated using multiple numbers of subcarriers that are
orthogonal to each other. A cyclic prefix is infixed between OFDM symbols to
annihilate the inter symbol interference (ISI) and inter-carrier interference
(ICI). The least square channel estimation method is used to minimize the
effect of multipath fading. An image, signal is modulated using BPSK, QPSK,
16QAM and 64QAM digital modulation schemes with OFDM and channel estimation and
transmitted over AWGN and fading channel. The objective of this work is to
improve the signal to noise ratio by reducing interference.
