衰落余量对cdma2000 1x前向链路发射功率和容量的影响

衰落余量决定链路可靠性并影响信道发射功率和用户容量的数值。本就衰落余量对cdma2000lx系统前向链路发射功率和渐近容量的影响进行了深入分析，首先介绍衰落余量概念，提出了cdma2000lx系统前向链路的发射功率和渐近容量表达式，然后通过仿真实验和数值计算给出一定条件下cdma2000lx系统前向链路的业务与导频SNR之间存在的对应关系，最后利用公式与仿真数据研究了衰落余量对前向总发射功率和渐近容量的影响。研究结果表明，cdma2000lx系统的前向总发射功率和渐近容量对衰落余量的大小十分敏感，衰落余量每增加ldB，都会引起总发射功率大幅上升，而渐近容量则迅速下降。

The Effect of Fading Margin to Forward Link Transmit Power and Capacity of cdma2000 1x

The fading margin determines the performance of the link and affects the channel transmit power and the value of the user capacity.This paper analyzes the effect of fading margin for cdma20001x system forward link transmit power and progressive capacity.First,the concept of fading margin is introduced,both the expressions of cdma20001x system forward link transmit power and progressive capacity are proposed.Then the dependency relationship of the SNR between pilot and traffic channel of cdma20001x system is given through the simulation test and computation.At last the effect of the fading margin for forward link transmit power and progressive capacity is studied through formula and simulation data.The study shows that the total forward link transmit power and the progressive capacity are very sensitive to the fading margin,the increase of1dB fading margin leads to the considerable growth of the total transmit power and the rapid decrease of the progressive capacity.