Abstract: Performance of a indoor optical wireless link is mainly degraded by temporal dispersions resulting from multipath transmission. Up to now, the efficient and rigorous modeling of corresponding indoor channel including sophisticated reflection has not been proposed. A novel modeling scheme, named independent reflection interaction characterization, is presented which realizes tremendous saving in calculation and gives more insight on the channel characteristics. The new approach is based on consolidating the dependence of receiver parameters, transmitter parameters, and indoor environment into independent components. Changing parameters of the link requires recalculation of corresponding components. The new scheme is utilized to obtain an accurate profile of received power and delay spread throughout a room.

Key words: optical wireless access, indoor optical wireless communication, modeling, channel characterization, computation complexity

摘要： 室内光无线链路的表现主要受制于多径传输所导致的时延扩展效应。目前仍然缺少建模方案能够在考虑复杂反射存在的前提下高效地完成此类信道的准确表征。针对这一问题，提出了一种称为独立反射交互表征的新颖建模方案。这一新方案的核心思想是将接收器参数、发送器参数以及室内环境的相关性分离。在链路参数改变的情况下只需对相应部分进行重新计算即可完成新的建模，在很大限度上避免了重复运算。借助这一新的建模方案可以高效地获取接收信号功率以及时延扩展在整个房间的准确分布情况。

关键词: 光无线接入, 室内光无线通信, 建模, 信道表征, 计算复杂度