关键词: 信道模型, 多簇, 信道冲击响应（CIR）模型, 指数衰减

Abstract:

The design of stair emergency communication system vitally depends on the stair channel model. However, the signal multi-cluster characteristic has a significant impact on channel modeling, thus a novel stochastic multi-cluster Channel Impulse Response（CIR） model is proposed. The cluster arrival time is distance-dependent under the Line of Sight （LOS） environments. On the contrary, the arrival time of each cluster is irrelevant to the distance for the Non LOS （NLOS） cases. Each cluster of the CIR can be described by an exponential decay function, and the decay constant for each cluster is further found to be related to the distance. Extensive channel measurements are performed to prove the accuracy of the proposed model. The S-V model is also introduced for a comparison. Results show that the proposed model is more suitable for describing the propagation characteristics under indoor stair environments.

Key words: channel model, multi-cluster, Channel Impulse Response（CIR） model, exponential decay