where RS is the model used to describe the reflection pattern.
Slumps are identified by the chaotic and semitransparent nature of the reflection pattern (Stoker et al. 1991).
If there are strong specular components in the reflection pattern of the surfaces, the Phong model approximates those patterns well unlike that of the Lambert model [15, 16].
It is known that the reflection pattern of most surfaces can correctly be approximated using the Lambert or the Phong models.
When a ray impinges on a surface, the reflection point is converted into a new optical source, thus a new ray is generated with a probability distribution provided by the reflection pattern of that surface.
When a ray impinges on a surface, the reflection point becomes a new optical source; thus, a new ray is generated with a probability distribution provided by the reflection pattern of that surface.
where t i,k represents the time instant in which the power is detected by the receiver and R S (θ k,R,θ',λ) is the model used to describe the reflection pattern.
To this end, the models for the reflection pattern of surfaces and the effective signal collection area of a conventional angle diversity receiver were proposed, which more closely approximate real behaviour than those previously reported.
The propagation characteristics of the indoor infrared channel are fully described by the channel's impulse response, which depends on multiple factors such as the room geometry, the reflection pattern of surfaces, the emitter and receiver characteristics, and their relative locations.
The propagation characteristics of an indoor infrared channel are fully described by the channel's impulse response, which depends on multiple factors such as the room geometry, the reflection pattern of surfaces, the emitter and receiver characteristics, and their relative locations.
