Optimum Equivalent Loading in Multi-Dimensional Transmission

Loading methods for wireline and wireless transmission systems are explained and reviewed to allow examination of fundamental equivalences between approaches to optimum transmission with linear cross-dimensional interference. Shannon's famous water-filling method is then re-interpreted by exami...

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Veröffentlicht in:IEEE open journal of the Communications Society Jg. 1; S. 681 - 699
Hauptverfasser: Cioffi, John M., Chow, Peter S., Kerpez, Kenneth J.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Adaptive modulation
coded modulation
Codes
Constellations
discrete multitone (DMT)
Equivalence
Load management
Maximum likelihood decoding
modulation and coding scheme (MCS)
Multidimensional methods
OFDM
orthogonal frequency-division multiplexing (OFDM)
State feedback
ISSN:2644-125X, 2644-125X
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Abstract Loading methods for wireline and wireless transmission systems are explained and reviewed to allow examination of fundamental equivalences between approaches to optimum transmission with linear cross-dimensional interference. Shannon's famous water-filling method is then re-interpreted by examining the difference between mutual information and the constellation size used on each tone. Results reinforce that highest performance in all methods retains use of Shannon's water-filling. However, results also find that a constant-size constellation on all energized water-filling dimensions, when used with a good code and an appropriate joint maximum-likelihood decoder, is sufficient to approximate this highest performance. This means that tone-dependent constellation variation is not necessary, which increases receiver complexity but reduces the need for channel-state feedback. This then leads to some adaptive MCS (modulation and coding scheme) equivalent loading methods that can be applied generally to wireline and wireless transmission.
AbstractList Loading methods for wireline and wireless transmission systems are explained and reviewed to allow examination of fundamental equivalences between approaches to optimum transmission with linear cross-dimensional interference. Shannon’s famous water-filling method is then re-interpreted by examining the difference between mutual information and the constellation size used on each tone. Results reinforce that highest performance in all methods retains use of Shannon’s water-filling. However, results also find that a constant-size constellation on all energized water-filling dimensions, when used with a good code and an appropriate joint maximum-likelihood decoder, is sufficient to approximate this highest performance. This means that tone-dependent constellation variation is not necessary, which increases receiver complexity but reduces the need for channel-state feedback. This then leads to some adaptive MCS (modulation and coding scheme) equivalent loading methods that can be applied generally to wireline and wireless transmission.
Author Cioffi, John M.
Chow, Peter S.
Kerpez, Kenneth J.
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StartPage 681
SubjectTerms Adaptive modulation
coded modulation
Codes
Constellations
discrete multitone (DMT)
Equivalence
Load management
Maximum likelihood decoding
modulation and coding scheme (MCS)
Multidimensional methods
OFDM
orthogonal frequency-division multiplexing (OFDM)
State feedback
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Title Optimum Equivalent Loading in Multi-Dimensional Transmission
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