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Multi input multi output (MIMO) radars have multiple antenna radars that each of them can transmit signals. For that matter, to avoid interference, transmitted waveform must be mutually orthogonal. This paper has proposed a new approach by using bee algorithm (BA) and artificial bee colony (ABC) to design orthogonal discrete frequency coding waveforms (DFCWs) which have desirable autocorrelation and cross correlation characteristic for orthogonal MIMO radars. The results represent a various ability of these algorithms. The cross correlation and auto correlation are better designed by the BA and ABC, respectively.