一种低计算复杂度WCDMA功率控制仿真算法

A Low Computational Complexity Simulation Algorithm for Power Control in WCDMA System

为了加速功率控制,通过采用dB值加减代替原始数据乘除和非线性运算,提出了一种新的低复杂度宽带码分多址（WCDMA）系统功率控制仿真算法,并给出所提算法累积误差的定量分析.数值仿真结果显示,使用此低复杂度算法,系统性能几乎没有损失,相对于传统功率控制算法仿真时间减少为原来的35%-40%,相对于修正的传统功率控制算法仿真时间减少为原来的70%-80%;相应地,使用本算法的动态仿真系统相对于使用传统功率控制算法的系统仿真时间减少为原来的50%,相对于使用修正传统功率控制算法的系统仿真时间减少为原来的85%.本算法在一定程度上解决了动态仿真系统速度慢的问题.

In order to accelerate power control （PC） simulation, a low computational complexity simulation algorithm is proposed. It replaces multiplication, division, and nonlinear operations with decibel （dB） addition and subtraction to perform wideband code division multiple access （WCDMA） PC. Furthermore, the error of the proposed algorithm is analytically derived. Numerical results show that the proposed algorithm can save lots of simulation time whereas introducing a small amount of error. The proposed algorithm saves 60% --65 % central processing unit （CPU） time over the conventional algorithm, and 20 % --30 % CPU time over the modified conventional algorithm. Equivalently, simulation system aimed at the proposed algorithm reduces 50 % CPU time compared to one with the conventional algorithm, and 15 % CPU time compared to one with the modified conventional algorithm. To a certain extent, the proposed algorithm has solved the problem that makes dynamic simulator run slowly.