CAJ | 학술논문

WiMAX上行链路采用功率控制提高系统容量和链路质量，在基于信号干扰噪声比(SINR)平衡准则的功率控制中，同道干扰和基站端天线合并算法对用于功率控制的SINR有重要影响。首先构建了WiMAX同道干扰模型，根据该模型推导出功率控制中SINR的中断概率；然后，针对基站端天线合并算法对SINR中断概率的影响，提出硬/软限幅合并算法。仿真结果表明，提出的合并算法能够有效抑制同道干扰，降低功率控制中SINR的中断概率，改善WiMAX上行功率控制性能。
WiMAX상행련로채용공솔공제제고계통용량화련로질량，재기우신호간우조성비(SINR)평형준칙적공솔공제중，동도간우화기참단천선합병산법대용우공솔공제적SINR유중요영향。수선구건료WiMAX동도간우모형，근거해모형추도출공솔공제중SINR적중단개솔；연후，침대기참단천선합병산법대SINR중단개솔적영향，제출경/연한폭합병산법。방진결과표명，제출적합병산법능구유효억제동도간우，강저공솔공제중SINR적중단개솔，개선WiMAX상행공솔공제성능。
Power control is efficiently utilized to improve WiMAX system capacity. For the signal interference and noise ratio (SINR) balance criterion based power control technique, the co-channel interference and the diversity combination of base station antenna have important effect on the SINR. In this paper, co-channel interference (CCI) model for WiMAX networks is presented, the outage probability of SINR with respect to power control is derived based on the CCI model and finally, hard/soft limiting combining algorithms are proposed to reduce interference. Simulation results show that the proposed combining algorithms can suppress the co-channel interference and reduce the outage probability of SINR, so that the power control performance of WiMAX uplink can be improved.