主用户延时约束下的认知无线电遍历容量研究

针对认知无线电系统中传统的功率限制约束无法保证主用户延时问题，本文提出了一种新的主用户有效容量约束模型，使认知无线电系统在满足认知用户共享频谱需求的同时，使主用户在延时约束下稳定传输。并基于该模型进一步推导了 Rayleigh 衰落环境下认知用户遍历容量下界性能。数值仿真结果显示了提出的约束模型能够保证主用户传输的同时提升认知用户的传输容量。

Research on Cognitive Radio Ergodic Capacity Under Main Users Delay Constraint

Aiming at the problem that the traditional power constraint can not guarantee the delay of the main users in the cognitive radio system, this paper proposes a new effective user capacity constraint model, which makes the cognitive radio system meet the needs of the cognitive spectrum sharing, So that the main users in the delay under the constraints of stable transmission. Based on this model, the lower bound performance of cognitive user ergodic capacity in Rayleigh fading environment is deduced. The numerical simulation results show that the proposed constraint model can guarantee the transmission capacity of the cognitive user while transmitting the main users.