POSITION-BASED SPECTRUM SHARING ANALYSIS IN MULTI-USER MIMO COGNITIVE RADIO SYSTEMS
Keywords:
Cognitive radio, MIMO, spectrum sharing, multi-user communication, bit error rateAbstract
This paper introduces the performance analysis of multi-user spectrum sharing based the effect of node positions in MIMO cognitive radio (CR) network. The objective is to make a CR technology become reliable and closer to the reality. The authors have developed the performance analysis that supports both of non-overlapping and overlapping spectrum sharing, and also evaluated data in term of node positions inside the coverage area. Which the advantages that enhance the existing works are 1) this paper develops the performance analysis to support multi-user CR systems, 2) it describes the significant effect of each node position and the distance between them, and 3) it combines the decision results on both downlink and uplink operations. The simulation results show the performance of secondary users in terms of the bit error rate inside the coverage area and the comparison result between the non-overlapping and overlapping cases. The outcome of this paper is very useful to enhance CR system. Also, it can be easily implemented in practice at the state of spectrum sharing. The users can be realized by themselves whether their positions are in the available area or not.
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