Controlling Initial and Final Radii to Achieve a Low-Complexity Sphere Decoding Technique in MIMO Channels

Table 2

Reduction in complexity corresponding noise variance.

Noise variance	SE-SD Complexity reduction (%) when𝐶0=𝐶𝑏𝑎	PSE-SD complexity reduction (%)	EPSE-SD complexity reduction (%)
2.49	20	30	52
1.14	3	8	22
1.02	−2	3	13
0.203	−13	−7	1
0.056	−32	−30	−27