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28 April 2004 Impact of ultrawideband on CDMA2000 forward link performance
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Proceedings Volume 5284, Wireless Communications and Networks; (2004)
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
The future proliferation of UWB-enabled devices raises legitimate concerns for the impact of its use on the performance of incumbent radio systems. In this paper, we present analytical models that quantify the blocking probability and the increase in forward traffic channel power allocation in the presence of noise-like UWB interference. The cdma2000 forward link has a fixed maximum transmit power but can control the fraction of total forward link power allocated to each traffic channel. If a terminal experiences a loss in sensitivity due to the presence of UWB energy, the base station can raise its power allocation to compensate for these conditions, up to a limit. If, however, the conditions at the handset require more power than that which is allowed by the system, then the traffic channel is blocked. In this study, we consider system performance as a function of the UWB power spectral density and its separation from the victim cdma2000 1X terminal. Although further study is pending, our analysis generally shows that protection of the cdma2000 forward link for indoor reception requires the UWB indoor emission limit to at least be below 20 dB below the currently specified emission limit when there is a single radiating UWB source.
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Marilynn P. Green and Peter Wang "Impact of ultrawideband on CDMA2000 forward link performance", Proc. SPIE 5284, Wireless Communications and Networks, (28 April 2004);

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