基于相关的DMB-T信号的频谱感知方法研究

摘要

Spectrum sensing scheme for digital multimedia broadcasting-terrestrial system in China is investigated. The probabilities of false alarm and missed detection of energy detection for DMB-T system are analyzed theoretically. For frame header mode 2, the matched filter method is utilized to perform spectrum sensing. For frame header mode 1 and 3, extended pseudonoise se-quences are proposed to be the local correlation sequences to perform correlation based spectrum sensing.%研究了我国地面数字多媒体广播（DMB-T）系统的频谱感知算法。理论上分析了在该系统3种模式下能量检测算法的虚警和漏检概率。对于帧头模式2提出了采用匹配滤波器方法进行频谱感知，对于帧头模式1和模式3提出了新的扩展PN序列作为本地相关序列来进行频谱感知。