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We describe a state-of-the-art channel sounder to support channel-model development for mobile millimeter-wave (mm-wave) communications. The system can measure the complex amplitude, delay, and angle of arrival of the multipath components of indoor and outdoor channels. Specifically, a custom multiplexer (MUX) records the channel impulse response across a 16-element receive (RX) antenna array in ...
This paper reports a new design for switched-beam antenna at 2.4 GHz. This single octagonal-shape antenna is allowed to have eight different beam-patterns which can be controlled by shorted circuit at different edges. The prototype is constructed and tested to demonstrate its beam steering capability. At the end of this paper, simulation and measured results are compared to confirm performance of...
Three applications in wireless networks where model-free stochastic learning is applicable, are discussed. The learning based optimization problems are formulated and simulation results are presented. Some open issues are also discussed.
This paper investigates the effective gain of antennas in indoor channels. A metric called instantaneous effective gain is proposed, and a multiple-cluster 3D channel model is used to facilitate the proposed antenna effective gain. In the multiple-cluster channel model, Laplacian and double exponential distribution are utilized to model azimuth and elevation signal power distribution respectively,...
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