Underlay mode Sample Clauses

Underlay mode. ‌ The Underlay mode refers to a technique in which the secondary user can only share the spectrum provided its signal remains below the acceptable interference threshold of the primary user. The threshold refers to the tolerated peak or average power of the primary user receiver [19], [20]. This is a useful constraint when the signal variation at the primary user receiver is quasi-static, such as Television unit. However, when signal variations from the primary user transmitter to the primary user receiver are random, outage probability is a better measure. Outage at the primary user receiver occurs when the SINR falls below a specific threshold which is different from the interference threshold. The spectrum sharing constraint in this scenario is based on acceptable