SHAO Min-si1, MAO Jian-xu1, HUANG Xiao-xia2. Spectrum access protocol for cognitive radio network based on smart antenna[J]. 2012, 31(10): 70-74. DOI: 10.13873/j.1000-97872012.10.020.
Smart antenna with the characteristics of spatial separation is introduced into cognitive radio which greatly improve the spectrum efficiency in space domain.In order to further improve the spectrum utilization efficiency
a spectrum access protocol which can be used in space and enables cognitive users to coexist with primary user and optimizes the allocation of spectrum and spatial resource and the using efficiency is improved.In addition
the successful communication probability and network throughput of the cognitive users are simulated and analyzed theoretically.The results show that compared with the Omni antenna
the cognitive radio systems based on smart antenna can get more opportunities for transmission
and throughput is significantly improved.
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references
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