Joint time-code spectrum sensing algorithm for cognitive radio
一种时域—码域联合的认知无线电频谱感知算法

In order to improve the performance of spectrum sensing in cognitive radio systems, this paper studied the multi-dimensional spectrum sensing, and proposed a joint time-code spectrum sensing algorithm. The proposed algorithm utilized the characteristics of primary signals with direct-sequence spread spectrum in both the time domain and the code domain, and detected the state of the channel from both time domain and code domain perspectives using energy detection in the time domain and analyzing power spectrum of primary users in the code domain. Finally it confirmed the state of the channel together. Simulation results show that the performance of the joint algorithm outperforms the single time-domain or code-domain spectrum sensing algorithm. The proposed algorithm is applicable in spectrum sensing of primary users with direct-sequence spread spectrum.