generates a fading signal where a direct (LOS) component is present Rician channel

这一信道模型能够描述由电离层和对流层反射的短波信道，以及建筑物密集的城市环境。12瑞利衰落只适用于从发射机到接收机不存在直射信号（LoS，Line of Sight）的情况，否则应使用莱斯衰落信道作为信道模型-This channel model is able to describe the HF channel reflected by the ionosphere and troposphere, as well as building a dense urban environment.

With rician channel model, both Line of Sight (LOS) and non Line of Sight(NLOS) components are simulated between transmitter and receiver. MATLAB provides built in function by name ricianchan as explained below along with rician matlab code-With rici

Rician衰落通道用于对视线（LOS）进行建模，其中因子K被定义为LOS的平均功率与非视线（NLOS）的平均功率的比值。 修改b）中的代码，分别实现K = -40 dB和15 dB的Rician衰落。(A Rician fading channel is used to model the channel with line of sight (LOS), where a factor K is defined as the ratio of the mean power of the LOS