| CLT | Central limit theorem |
| CR | Cognitive radio |
| DSP | Digital signal processor |
| LOD | Locally optimum detection |
| Probability density function | |
| PU | Primary user |
| RF | Radio frequency |
| r.v. | Random variable |
| SCAR-Phase | Superimposed training combined approach for a reduced phase |
| SNR | Signal-to-noise ratio |
| ST | Superimposed training |
| ST-Det | Superimposed training-based detector |
| SU | Secondary user |
| SYNC | Synchronization |
| TDMT | Time domain multiplexed training |
| TIR | Training-to-information ratio |
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