Hi Xiaoyan,
I understand that you are looking to determine the received signal power at the receiver (Rx) site within your propagation model.
You can achieve this by utilizing the "pathloss" function, which provides the path loss experienced by the rays of the propagation model.
Although this function does not directly provide the received signal power, you can calculate it using the formula:
where 
is the received power, 
is the transmitted power, and Lis the pathloss and all are expressed in dBW.
is the received power, is the transmitted power, and Lis the pathloss and all are expressed in dBW. Alternatively, you can obtain the received signal power from the "rays" object returned by the "raytrace" function. This object contains information of each ray in the propagation model as a cell array, including the path loss of each ray.
For further understanding, you can refer the following links:
- pathloss: returns the pathloss of radio wave propagation at Rx site. https://www.mathworks.com/help/comm/ref/rfprop.freespace.pathloss.html
- raytrace: computes the propagation paths. https://www.mathworks.com/help/comm/ref/rfprop.freespace.pathloss.html
I hope this resolves your query.
