Channel Estimation Using Lms Algorithm for Discrete Wavelet Transform Based Ofdm

In wireless communication systems, to obtain channel state information (CSI) channel estimation is required. By doing estimation of channel bit error rate (BER) reduces. LMS algorithm gives best performance comparative to previous estimation technique LS and MMSE, the former is too sensitive to noise and later is too complex. LMS algorithm adopts the principle of steepest descent method and belongs to a group of methods known as stochastic gradient methods. This algorithm can adjust to modify the signals statistics; thus it is an adaptive filter.