Table 3 Numbers of complex-valued operations required for the ZF STBC decoder: a user is removed from the system
From: Low computational complexity methods for decoding of STBC in the uplink of a massive MIMO system
Number of users (M) | 8 | 16 | 24 | 32 |
|---|---|---|---|---|
Direct inverse | 88447 | 307610 | 778335 | 1631695 |
Proposed update | 44588 | 112588 | 199020 | 303884 |
Complexity reduction (updating) | 50% | 63% | 74% | 81% |
Inverse approximation R = 3 | 38976 | 91200 | 151616 | 220224 |
Complexity reduction (approximation) | 55% | 70% | 80% | 87% |