Research Article

Low-Complexity Inverse Square Root Approximation for Baseband Matrix Operations

Table 2

Suggestive comparison of inverse square root methods. The proposed method has the highest area efficiency with 𝑁 = 2 , 3 , 4 .

methodAccuracy
(FWL of result)
Area
(GE)
Area efficiency (accuracy/area)

[5] 52 40665.25 0.0012787
[6] 52 38038.05 0.0013671
[10] 52 32695.50 0.0015905
[13] 23 7123.80 0.0032286
[21] 16 4597.80 0.0034800
[16] 23 4383.50 0.0052469
[23] 16 1602.00 0.0099875
Proposed 𝑁 = 1 4 405.75 0.0098583
Proposed 𝑁 = 2 6 433.75 0.0138329
Proposed 𝑁 = 3 8 514.00 0.0155642
Proposed 𝑁 = 4 10 622.00 0.0160772