摘要： 根据认知无线电系统中认知用户的不同通信需求，结合干扰温度模型和非合作博弈理论，以单小区CDMA为系统平台，提出基于SINR的对数效用函数的干扰受限认知无线电系统功率控制算法。仿真实验结果表明，与经典SINR平衡算法及Koskie-Gajic算法相比，该算法在满足认知用户目标SINR和主用户干扰温度限制的前提下，通过适当增大认知用户发射功率，能够满足认知用户高速数据通信的需要。

关键词: 认知无线电, 干扰受限系统, 功率控制, 非合作博弈, 对数效用函数

Abstract: To meet the communication needs between licensed users and secondary users in cognitive radio and to ensure that the unimpaired of licensed users, combined with interference temperature model and non-cooperative game theory, a logarithmic utility power control algorithm is presented for interference-limited single-cell CDMA cognitive radio system based on SINR. The analysis and simulation results show that the proposed algorithm, compared with the SINR balancing algorithm and the Koskie-Gajic algorithm, is at the premise of guaranteeing the secondary users’ target SINR as well as the licensed users’ interference temperature constraints, can realize the secondary users’ high data speed communication with a proper increase of the secondary users’ transmitting power.

Key words: cognitive radio, interference-limited system, power control, non-cooperative game, logarithm utility function

中图分类号: 

• TP311.52