CAJ | 학술논문

　　检测门限作为认知无线电系统的重要指标，其合理设置是确保授权系统和认知系统工作的基础。认知TD-LTE系统对数字电视广播信号的检测门限分析利用系统间共存研究方法，仿真了不同典型参数下的覆盖区和干扰保护区，基于链路的对称性分析了认知TD-LTE系统对数字电视广播信号的最小检测门限，并验证了此门限下的性能。仿真结果表明，-87 dBm检测门限值既可满足对数字电视系统的保护，也可实现良好的检测和虚警性能。
　　검측문한작위인지무선전계통적중요지표，기합리설치시학보수권계통화인지계통공작적기출。인지TD-LTE계통대수자전시엄파신호적검측문한분석이용계통간공존연구방법，방진료불동전형삼수하적복개구화간우보호구，기우련로적대칭성분석료인지TD-LTE계통대수자전시엄파신호적최소검측문한，병험증료차문한하적성능。방진결과표명，-87 dBm검측문한치기가만족대수자전시계통적보호，야가실현량호적검측화허경성능。
As a key indicator,reasonable setting of detection threshold guarantees the authorization and cognitive system to work effectively. Under the guidance of coexistence analysis between TD-LTE and digital broadcasting television,detection threshold can be derived by calculating coverage and protecting areas employing symmetric link. Simulation results show that -87 dBm detection threshold can not only avoid interfering digital broadcast-ing television,but also achieve good performance of false alarm probability and detection probability.