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

Table 1

Reduction in complexity corresponding the number of transmit antennas.

Number of transmit antennas	SE-SD complexity reduction (%) when𝐶0=𝐶𝑏𝑎	PSE-SD complexity reduction (%)	EPSE-SD complexity reduction (%)
20	30	40	58
12	15	21	33
10	9	16	27
6	−5	−2	4
4	−13	−7	1