On the Capacity of MIMO Wireless Channels with Dynamic CSIT

8 years 11 months ago
On the Capacity of MIMO Wireless Channels with Dynamic CSIT
Abstract— Transmit channel side information (CSIT) can significantly increase MIMO wireless capacity. Due to delay in acquiring this information, however, the time-selective fading wireless channel often induces incomplete, or partial, CSIT. In this paper, we first construct a dynamic CSIT model that takes into account channel temporal variation. It does so by using a potentially outdated channel measurement and the channel statistics, including the mean, covariance, and temporal correlation. The dynamic CSIT model consists of an effective channel mean and an effective channel covariance, derived as a channel estimate and its error covariance. Both parameters are functions of the temporal correlation factor, which indicates the CSIT quality. Depending on this quality, the model covers smoothly from perfect to statistical CSIT. We then summarize and further analyze the capacity gains and the optimal input with dynamic CSIT, asymptotically at low and high SNRs. At low SNRs, dynamic C...
Mai Vu, Arogyaswami Paulraj
Added 16 Dec 2010
Updated 16 Dec 2010
Type Journal
Year 2007
Where JSAC
Authors Mai Vu, Arogyaswami Paulraj
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