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Two models for noisy feedback in MIMO channels
Published in
2008
Pages: 718 - 722
Abstract
Two distinct models of feedback, suited for FDD (Frequency Division Duplex) and TDD (Frequency Division Duplex) systems respectively, have been widely studied in the literature. In this paper, we compare these two models of feedback in terms of the diversity multiplexing tradeoff for varying amount of channel state information at the terminals. We find that, when all imperfections are accounted for, the maximum achievable diversity order in FDD systems matches the diversity order in TDD systems. TDD systems achieve better diversity order at higher multiplexing gains. In FDD systems, the maximum diversity order can be achieved with just a single bit of feedback. Additional bits of feedback (perfect or imperfect) do not affect the diversity order if the receiver does not know the channel state information. © 2008 IEEE.
About the journal
JournalConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN10586393
Open AccessYes
Concepts (15)
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    Diversity order
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    DIVERSITY-MULTIPLEXING TRADE-OFF
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    FDD SYSTEMS
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    FREQUENCY-DIVISION DUPLEXES
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    MAXIMUM ACHIEVABLE DIVERSITY
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    Mimo channel
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    MULTIPLEXING GAINS
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    Noisy feedback
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    Single-bit
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    Channel state information
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    Communication channels (information theory)
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    Frequency division multiplexing
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    Power control
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    Time division multiplexing
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    State feedback