From: Frequency-domain equalizers with zero restoration for zero-padded block transmission with high SNR
Equalizer | Calculating W | Evaluating \(\hat {\textbf {x}}\) |
---|---|---|
W ZFE-TD, W MMSE-TD | \(\mathcal {O}(N^{2})\) | \(\mathcal {O}(N^{2})\) |
W ZFE-FD-FOLD, W MMSE-FD-FOLD | \(\mathcal {O}(N)\) | \(\mathcal {O}(N\log (N))\) |
W ZFE-FD-EXT, W MMSE-FD-EXT | \(\mathcal {O}(M)\) | \(\mathcal {O}(M \log (M))\) |
W ZFE-ZR, W MMSE-ZR | \(\mathcal {O}(M)\) | \(\mathcal {O}(M \log (M))\) |
+\(\left (M+\frac {K}{3}\right)K^{2}\) | + (2K−1)N |