Abstract
There are some practical means to create multiple diffusing spots. E. Simova et al. combined the diffusing and splitting functions in a single holographic optical element (HOE), while J. Carruthers and J. Kahn used eight laser diodes to produce eight collimated beams. This chapter investigates the use of a computer‐generated hologram (CGH) as a beam‐splitting element for a multiple‐beam transmitter for indoor wireless infrared links. It presents simulation results for the channel parameters when such a transmitter is utilized over a communication link. Comparison with a pure diffuse link is made in order to distinguish the characteristic features of the multispot diffusing configuration (MSDC). A communication link utilizing angle diversity detection with a seven‐branch composite receiver is computer simulated, and is compared to the case when a single element wide field‐of‐view (FOV) receiver is used. The system robustness against shadowing and blockage is also discussed.
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