Diversity gains of power control with noisy CSIT in MIMO channels
IEEE Transactions on Information Theory
IEEE Transactions on Wireless Communications
Fading channels: information-theoretic and communications aspects
IEEE Transactions on Information Theory
Coded diversity on block-fading channels
IEEE Transactions on Information Theory
Optimum power control over fading channels
IEEE Transactions on Information Theory
On coding for block fading channels
IEEE Transactions on Information Theory
Space-time transmit precoding with imperfect feedback
IEEE Transactions on Information Theory
Combining beamforming and orthogonal space-time block coding
IEEE Transactions on Information Theory
Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels
IEEE Transactions on Information Theory
Coded modulation in the block-fading channel: coding theorems and code construction
IEEE Transactions on Information Theory
Diversity–Multiplexing Tradeoff in MIMO Channels With Partial CSIT
IEEE Transactions on Information Theory
A Tight Lower Bound to the Outage Probability of Discrete-Input Block-Fading Channels
IEEE Transactions on Information Theory
Multidimensional Coded Modulation in Block-Fading Channels
IEEE Transactions on Information Theory
Coded modulation with mismatched CSIT over MIMO block-fading channels
IEEE Transactions on Information Theory
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Communication over delay-constrained block-fading channels with discrete inputs and imperfect channel state information at the transmitter (CSIT) is studied. The CSIT mismatch is modeled as a Gaussian random variable, whose variance decays as a power of the signal-to-noise ratio (SNR). We focus on the large-SNR behavior of the outage probability when transmit power control is used. We derive the outage exponent as a function of the system parameters, including the CSIT noise variance exponent and the exponent of the peak power constraint. It is shown that CSIT, even if noisy, is always beneficial and leads to significant gains in terms of exponents. It is also shown that when precoders are used at the transmitter, further exponent gains can be attained at the expense of higher decoding complexity.