A static spectrum aggregation algorithm in cognitive radio system

作者：Yin Cong; Tan Xue Zhi^*; Ma Lin; Li Xiu Hua

来源：Journal of Harbin Institute of Technology, 2013, 20(2): 40-44.

• Intelligent technology
• Primary Users
• Secondary user
• Spectrum Aggregation

Cognitive radio (CR) is known as an intelligent technology allowing a secondary user (SU) to occupy a primary user's (PU's) band when it is idle. Appearance of the idle band may be contiguous or non-contiguous. In other words, the PU's band and the idle band are distributed alternately over the spectrum. Apparently the non-contiguous idle band cannot be fully utilized in this context. This paper proposes an algorithm to solve the problem of low utilization of the non-contiguous idle band and to increase the number of the SU who needs access to the spectrum by a static spectrum aggregation (SSA) method combined with non-contiguous orthogonal frequency division multiplexing (NC-OFDM). The simulation results show that the SSA algorithm realizes at least 70% utilization of the idle band which provides access to the spectrum for as many as 30 SUs as expected.

• 出版日期2013