Path loss analysis in millimeter wave cellular systems for urban mobile communications

Ramesh Rajagopalan; Mitchell Hoffman

doi:10.1117/12.2238591

19 September 2016 Path loss analysis in millimeter wave cellular systems for urban mobile communications

Ramesh Rajagopalan, Mitchell Hoffman

Proceedings Volume 9977, Remote Sensing System Engineering VI; 99770G (2016) https://doi.org/10.1117/12.2238591
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

The proliferation in the number of mobile devices and developments in cellular technology has led to an ever increasing demand for mobile data. The global bandwidth shortage facing wireless carriers today has motivated research for fifth generation (5G) cellular systems. In recent years, millimeter wave (mmW) frequencies between 30 and 300 GHz are being considered as a promising technology for 5G systems. Such systems can offer superior user experience by providing data rates that exceed one Gigabit per second and latencies lower than a millisecond. However, there is little research about cellular mmW propagation in densely populated urban environments. Understanding the radio channel is a primary requirement for optimal design of mmW systems. Radio propagation in mmW systems faces significant challenges due to rapidly varying channel conditions and intermittent connectivity. In this paper, we study the propagation of mmW spectrum in an urban environment. We use a statistical model to simulate an urban environment with diverse building distributions. We perform extensive simulations to analyze the path loss behavior for both line of sight (LOS) and non line of sight (NLOS) conditions for 28 GHZ and 73 GHZ mmW frequencies. We observe that the path loss approximates a logarithmic fit for both LOS and NLOS environments. Our simulations show that the omnidirectional free space path loss is approximately 30 dB higher for mmW systems compared to current 3G PP cellular systems. To address this challenge, we propose using highly directional horn antennas with beam forming for reducing the path loss.

Conference Presentation

Citation Download Citation

Ramesh Rajagopalan and Mitchell Hoffman "Path loss analysis in millimeter wave cellular systems for urban mobile communications", Proc. SPIE 9977, Remote Sensing System Engineering VI, 99770G (19 September 2016); https://doi.org/10.1117/12.2238591

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