摘要
针对采用专用控制信道的DS -CDMA系统的反向链路 ,本文提出一种直接利用控制信道的导频符号进行SIR测量的闭环功率控制方法 ,并通过计算机仿真对链路的性能进行分析。仿真结果表明 ,由于编码交织及功率控制的共同作用 ,在链路达到一定误码率时 ,所需的信噪比随着信道衰落的增加而增加缓慢 ;最佳的功率控制步长取决于信道衰落速率 ;功率控制命令的传输错误概率在小于 10 - 1 时对链路性能影响较小。
In this paper,an SIR-based close loop power control algorithm is proposed,which only utilizes the pilot of control channel in DS-CDMA uplink to measure the received SIR.The performance of the uplink is analyzed by meanings of computer simulations.The results show that due to coding,interleaving,and power control,for a given bit error rate,the required signal to interference ratio increases slightly as the fading speed increases;The optimal power control stepsize depends on channel fading speed;If the fransmission error probability of power control command is less than 10 -1 ,it has a little effect on the link performance.
出处
《杭州电子工业学院学报》
2000年第6期12-15,共4页
Journal of Hangzhou Institute of Electronic Engineering
基金
浙江省科学技术委员会重点项目!(981110 42 1)
国家自然科学基金资助项目!(6 9972 0 44 )
