摘要： 针对传统频谱感知方法局限在单个频带上的问题，介绍一种多带联合检测的频谱感知方法。以正交频分复用系统为背景，基于能量检测方法，联合多个频带选取最优门限向量，使其在总干扰受限的情况下，总吞吐量达到最大。仿真结果表明，与传统使用一致门限值的多带检测方法相比，该方法的有效性得到提高。

关键词: 认知无线电, 频谱感知, 联合检测, 正交频分复用

Abstract: Aiming at the problem that conventional spectrum sensing technique is usually focused on signal band, this paper introduces a multi-band joint detection spectrum sensing scheme for Orthogonal Frequency Division Multiplexing(OFDM) system, which jointly detects a bank of multiple narrow-bands based on the energy detection in order to maximize the aggregate opportunistic throughput in an interference limited cognitive radio network. Simulation results show that the performance of multi-band joint detection scheme is improved compared with the conventional sensing method which uses the same threshold over multiple frequency bands.

Key words: cognitive radio, spectrum sensing, joint detection, Orthogonal Frequency Division Multiplexing(OFDM)

中图分类号: 

• TN915