Linear filtering using OAM/OSM

In this lab session we performed Overlap add method  and Overlap save methods operation by  taking long input sequence x(n). This long sequence was decomposed into small L point sequences such that N=L+M-1. These N point sequences where zero padded in OAM and using fft corresponding x[k] was found.these all x[k] were added to obtain the output on CCS.

1. In OAM method, the values which get overlap were added together.

2. In OSM method, the values which get overlap were discarded.

 The OAM and OSM methods divide the input signal into smaller lengths and filter output (FFT) of such smaller length signal is calculated. The overlapped portion is added in case of OAM and discarded in case of OSM. The resultant output is the output of the whole input signal.The aim of this experiment was to perform filtering of long data sequence using overlap add method and overlap save method.