Research Article
On the Eigenvalue Based Detection for Multiantenna Cognitive Radio System
Table 1
Promotion schemes of eigenvalue weighting based spectrum sensing algorithm.
| | Algorithm | Test statistic | Priori conditions |
| | Energy based maximum ratio combination (EN-MRC) | ,
where and are the eigenvalues of sample and the power of the PU signals, respectively. | PU signals’ energy and noise power |
| | Signal eigenvalue weighting (SEW) based detection | ,
where and are the eigenvalues of sample and PU signals’ covariance matrix, respectively. | Eigenvalues of PU signals’ covariance matrix and noise power |
| | Signal eigenvalue approximation weighting (SEAW) based detection | ,
where is the eigenvalues of sample covariance matrix; is the noise power at receiver. | Noise power at receiver |
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