Wireless Communications in the Energy -Limited Regime
Wu, Xinzhou
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Permalink
https://hdl.handle.net/2142/80898
Description
Title
Wireless Communications in the Energy -Limited Regime
Author(s)
Wu, Xinzhou
Issue Date
2004
Doctoral Committee Chair(s)
Srikant, R.
Department of Study
Electrical Engineering
Discipline
Electrical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
In the other case when B is large, it is not reasonable to assume any form of CSI. Thus, we consider noncoherent fading channels and characterize the reliability function in the low-SNR regime. Further, by allowing multiple transmit and receive antennas, we study the impact of multiple antennas on the fundamental tradeoff between communication rate and probability of decoding error. For the case when the fading matrix H has independent entries, we show that the number of transmit antennas plays a key role in reducing the peakiness in the optimal input signaling. Further, by considering a correlated channel model, we show that the maximum performance gain (in terms of the error exponent and communication rate) is achieved when the entries of the channel fading matrix are fully correlated.
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