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Title:
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On the Asymptotic Performance of Multiple Antenna Channels with Fast Channel Feedback |
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Author:
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Khoshnevis, Ahmad; Sabharwal, Ashutosh
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Type:
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Journal Paper |
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Keywords:
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MIMO; perfect feedback; quantized feedback; diversity-multiplexing tradeoff; power control |
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Citation:
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A. Khoshnevis and A. Sabharwal, "On the Asymptotic Performance of Multiple Antenna Channels with Fast Channel Feedback," IEEE Transactions on Information Theory, 2005. |
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Abstract:
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In this paper, we analyze the asymptotic performance of multiple antenna channels where
the transmitter has either perfect or finite bit channel state information. Using the diversitymultiplexing
tradeoff to characterize the system performance, we demonstrate that channel feedback
can fundamentally change the system behavior. Even one-bit of information can increase
the diversity order of the system compared to the system with no transmitter information. In
addition, as the amount of channel information at the transmitter increases, the diversity order
for each multiplexing gain increases and goes to infinity for perfect transmitter information. The
major reason for diversity order gain is a â location-dependentâ temporal power control, which
adapts the power control strategy based on the average channel conditions of the channel. |
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Date Published:
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2005-10-01 |
