Blind Signal Separation Using Discrete Cosine Transform

This paper studied the problem of blind signal separation (BSS) for the system of multiple input and multiple output signals (MIMO) of noisy signals. It uses the separation algorithm for the discrete cosine transforms (DCT) for blind of mixed signals, instead of separating the mixtures themselves, as a technique that achieves a great result in eliminating the noise.  We used the proposed algorithm with multi user kurtosis (MUK) that used for blind of mixed signals. We consider the instantaneous mixture of two sources. The simulation results show a considerable improvement in extracted signals when compared to original signals. We assume signal to noise ratio (SNR) between extracted and original signals to compare between them to give the better result. The separation of signals in a noisy environment is studied with and without the using the new technique. The simulation results confirm the usefulness of this technique.