On the irreducible error floor in fast fading channels

In fast fading channels without pilot information, existing receiver structures exhibit an "irreducible error floor," where their bit error rate (BER) levels out at high signal-to-noise ratio (SNR). This is even observed in practical maximum likelihood sequence detectors (i.e., MLSDs with...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2000-05, Vol.49 (3), p.1044-1047
Main Authors: Hart, B.D., Taylor, D.P.
Format: Article
Language:English
Subjects:
Additive white noise
Approximation
AWGN
Bit error rate
Channels
Detectors
Errors
Fading
Filters
Frequency
Gaussian noise
Mathematical analysis
Maximum likelihood detection
Optimization
Pilots
Receivers
Signal to noise ratio
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Summary:In fast fading channels without pilot information, existing receiver structures exhibit an "irreducible error floor," where their bit error rate (BER) levels out at high signal-to-noise ratio (SNR). This is even observed in practical maximum likelihood sequence detectors (i.e., MLSDs with certain approximations, in order to achieve finite per-symbol complexity). The conditions for optimality and for an error floor are examined in detail. We find that the standard receiver design choices induce an error floor unless the channel has very specific properties.
ISSN:0018-9545
1939-9359
DOI:10.1109/25.845121