一种新的信道模拟时间分辨率控制技术

针对宽带无线信道模拟尤其是短波信道模拟中存在的时间、时延相对独立且分辨率不一致的问题,提出了非对称的时间、时延分辨率控制技术,并验证了其有效性与正确性。首先提出了双时-非对称分辨率的概念,再利用拟合的方法确定时间轴上特征函数的其他点。仿真结果表明:双时-非对称分辨率控制技术缩短了信道模型参量的求解时间,且理论上能够满足信道模拟的需要,其有效性得到了验证。采用非对称的时间分辨率,在保证真实再现信道的前提下,能够减少采样点、降低处理器的处理压力,保证信道模拟的实时性。

A Novel Time Resolution Control Technique for Channel Simulation

In wideband wireless channel simulation,especially in HF channel simulation,time and delay are relatively independent and the resolutions of them are inconsist.A novel time resolution control technique,asymmetrical time and delay resolution technique,is proposed,and its effectiveness and correctness are proved below.This paper defines the concept of dual-time asymmetrical resolution,then the other points of the characteristic function on time axis are fitted by interpolation.Simulation results verify the validity of the new technique and show that the time loss of solving channel model parameters is shortened.By using asymmetrical time resolution,sampling points can be reduced and the burden of processors can be relieved,which guarantee the real-time performance of channel simulation.