Table 1 Computation load of the proposed, EVD-based, SAGE, NNS and ML detection algorithms

Prefiltering-based algorithm

\(K\left( {LN + JN^{2} + N^{3} + N^{2} } \right)\)

EVD-based algorithm

\(K\left( {LN + JL^{2} + L^{3} + L^{2} } \right)\)

SAGE

\(\alpha K\left( {LN + 2N + 2L} \right)\)

NNS

\(\alpha \left( {2K^{3} + \left( {6 + 2L} \right)K^{2} + 6LK + 2L} \right) + 6KLN + 2L\)

ML

\(\left( {L + K + LK} \right)^{{\left( {NM} \right)^{K} }}\)