Table 1 Computational complexity of the channel estimation methods
From: mm-Wave channel estimation with accelerated gradient descent algorithms
Method | Complex multiplications | Additions | Comparisons |
|---|---|---|---|
SPC | 2Mtotlog2Mtot+3IMtot | 2Mtotlog2Mtot+2IMtot | I M tot |
JPC | \(2M_{tot}\log _{2}M_{tot}+\frac {I(I+1)}{2}M_{tot}\) | \(2M_{tot}\log _{2}M_{tot}+\frac {I(I+1)}{2}M_{tot}+2IM_{tot}\) | I M tot |
AGDAR | 3Mtotq3+2q3Mtotlog2Mtot | 2q3Mtotlog2Mtot+5Mtotq3 | M tot q 3 |
RCS | 3Mtotq2q3+2Mtotq3+2q2q3Mtotlog2Mtot | Mtotq3+2q2q3Mtotlog2Mtot+5Mtotq2q3 | M tot q 2 q 3 |