Fast Path Loss Prediction By Using Virtual

This work proposes a new principle for fast path loss prediction and cell coverage calculations for urban microcells in high rise building environment. The technique is based on finding a virtual source located in line of sight with the mobile station (MS). This technique maps the out-of-sight propagation prediction problem to a line-of-sight propagation prediction problem. The received power at MS is given in a closed form expression. Based on comparison performed with experimental results, it seems that breakpoint is valid in side-street propagation. The proposed virtual source principle opens a door for a new fast computation technique for path loss modeling in the microcellular environment

Investigations Of Controlling Propagation Characteristics Using

This work proposes a propagation control technique for mobile communications in microcellular environment. Transmitting array antennas at the base station are utilized for controlling propagation characteristics. The propagation control technique can be used for interference reduction between neighboring cells and controlling the coverage area size (e.g., controlling propagation slope). Five propagation control methods are suggested. Three schemes are tested here, the antenna arrangement, the phase excitations and the displacements between antennas