Equalizer's Use Limitation for Complexity Reduction in a Green Radio Receiver

Table 2

Computational complexity of SNR_𝑝 estimation.

Method of SNR𝑝estimation	Computational complexity
SNR𝑝^LS	CC^LSSNR𝑝=2𝑃𝐿^2+2+𝑃𝐿+(𝐿−1)𝐿^2𝐿!
SNR𝑝^LMS	CC^LMSSNR𝑝=2𝐿𝑃+2+𝑃
SNR𝑝^CMA	CC^CMASNR𝑝=𝑁(2𝐿^2+𝐿+4)+2
SNR𝑝^inter	CC^interSNR𝑝=𝑃+3