Measurement-based channel modeling for mmWave wireless links in enclosed server platforms

G Wang, K Zhan, T Kamgaing… - 2017 IEEE Radio …, 2017 - ieeexplore.ieee.org
2017 IEEE Radio and Wireless Symposium (RWS), 2017ieeexplore.ieee.org
The large available bandwidths, demonstrations of fully-integrated silicon transceivers and
small physical antenna size make mm-wave frequencies attractive for wireless links within a
server chassis. In this paper, we focus on studying the feasibility of a mm-wave wireless link
within a commercial microserver chassis for high data-rate links and for management and
monitoring. Such servers have reflective metal walls and are densely populated with
microserver boards that create barriers for mm-wave signals. A custom test setup is used for …
The large available bandwidths, demonstrations of fully-integrated silicon transceivers and small physical antenna size make mm-wave frequencies attractive for wireless links within a server chassis. In this paper, we focus on studying the feasibility of a mm-wave wireless link within a commercial microserver chassis for high data-rate links and for management and monitoring. Such servers have reflective metal walls and are densely populated with microserver boards that create barriers for mm-wave signals. A custom test setup is used for in-situ channel measurements at 57GHz for both line-of-sight (LOS) and non-line-of-sight (NLOS) links across different TX-RX separations. The NLOS links show RMS delay spread of 32ns@50% CDF (~200ns@90% CDF) with path loss >55dB, indicating a challenging environment for low-power high-speed links. Therefore, a modified chassis with 10mm headroom between the top of the boards and chassis cover is proposed. Measurements show that such an environment can make the targeted wireless links feasible with ~35dB loss, and RMS delay spread of 14ns@50% CDF (~20ns@90% CDF).
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