在现有认知无线网络模型综合分析的基础上，针对以主用户发射机为中心进行干扰区域建模的不足，提出一种基于主用户接收机为中心的认知网络模型. 基于该模型，采用信息论的观点，在主用户最低吞吐量和主用户通信中断概率的限制条件下，分析得出了主用户通信半径、认知用户密度及主用户吞吐量的相互量化制约关系. 数值分析结果验证了该模型在认知用户对主用户接收机干扰过程中的合理性和有效性.

By analyzing the existing cognitive network models, this paper proposes a cognitive network model in which the primary receiver is treated as a center. This solves the irrationality problem when modeling the interference region where the primary transmitter is treated as a center. Using the proposed model and the information theory, we obtain mutual quantitative restriction correlation of the primary user communication radius, cognitive user density and throughput of primary user under the condition of lowest throughput and communication interruption probability of primary users. Numerical simulation results show that the model is reasonable and effective when a primary receiver is interfered by cognitive users.