Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading
This paper elucidates the relative benefits of bit loading and power loading for discrete multitone (DMT) modulation over wireline links. There is considerable variability in the use of bit and power loading in recent research on DMT for wireline applications. Here, we first compare different combin...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9953993/ |
| _version_ | 1797986756070473728 |
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| author | Behraz Vatankhahghadim Bahaa Radi Masum Hossain Anthony Chan Carusone |
| author_facet | Behraz Vatankhahghadim Bahaa Radi Masum Hossain Anthony Chan Carusone |
| author_sort | Behraz Vatankhahghadim |
| collection | DOAJ |
| description | This paper elucidates the relative benefits of bit loading and power loading for discrete multitone (DMT) modulation over wireline links. There is considerable variability in the use of bit and power loading in recent research on DMT for wireline applications. Here, we first compare different combinations of bit and power loading schemes in simulations. We propose a method for dynamically adjusting DMT bit and power profiles based on the bit error distribution across sub-channels, as determined by the receiver. We then present experimental results showing DMT operation at 75 Gb/s with a spectral efficiency of 2.5 b/sample over a channel with a smooth magnitude response exhibiting 26 dB attenuation at half the sampling rate and a loss of 33 dB at 1/4 the data rate (i.e., the Nyquist rate of a 4-level pulse-amplitude modulated link at the same data rate). The proposed dynamic bit and power allocation method reduces the bit error rate from <inline-formula> <tex-math notation="LaTeX">$\textrm {3}\times \textrm {10}^{-\textrm {3}}$ </tex-math></inline-formula> to <inline-formula> <tex-math notation="LaTeX">$\textrm {2} \times \textrm {10}^{-\textrm {5}}$ </tex-math></inline-formula>, measured with 23,265,420 bits. |
| first_indexed | 2024-04-11T07:37:54Z |
| format | Article |
| id | doaj.art-de94ae717e264404847b875f805d2919 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-11T07:37:54Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-de94ae717e264404847b875f805d29192022-12-22T04:36:41ZengIEEEIEEE Access2169-35362022-01-011012206112207310.1109/ACCESS.2022.32227579953993Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power LoadingBehraz Vatankhahghadim0https://orcid.org/0000-0002-2503-2856Bahaa Radi1https://orcid.org/0000-0003-1483-1000Masum Hossain2Anthony Chan Carusone3https://orcid.org/0000-0002-0977-7516Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, Toronto, CanadaEdward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, Toronto, CanadaElectrical and Computer Engineering Department, University of Alberta, Edmonton, CanadaEdward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, Toronto, CanadaThis paper elucidates the relative benefits of bit loading and power loading for discrete multitone (DMT) modulation over wireline links. There is considerable variability in the use of bit and power loading in recent research on DMT for wireline applications. Here, we first compare different combinations of bit and power loading schemes in simulations. We propose a method for dynamically adjusting DMT bit and power profiles based on the bit error distribution across sub-channels, as determined by the receiver. We then present experimental results showing DMT operation at 75 Gb/s with a spectral efficiency of 2.5 b/sample over a channel with a smooth magnitude response exhibiting 26 dB attenuation at half the sampling rate and a loss of 33 dB at 1/4 the data rate (i.e., the Nyquist rate of a 4-level pulse-amplitude modulated link at the same data rate). The proposed dynamic bit and power allocation method reduces the bit error rate from <inline-formula> <tex-math notation="LaTeX">$\textrm {3}\times \textrm {10}^{-\textrm {3}}$ </tex-math></inline-formula> to <inline-formula> <tex-math notation="LaTeX">$\textrm {2} \times \textrm {10}^{-\textrm {5}}$ </tex-math></inline-formula>, measured with 23,265,420 bits.https://ieeexplore.ieee.org/document/9953993/Bit error rate (BER)–awarebit loadingdiscrete multitone (DMT)orthogonal frequency-division multiplexing (OFDM)power loadingtransceiver |
| spellingShingle | Behraz Vatankhahghadim Bahaa Radi Masum Hossain Anthony Chan Carusone Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading IEEE Access Bit error rate (BER)–aware bit loading discrete multitone (DMT) orthogonal frequency-division multiplexing (OFDM) power loading transceiver |
| title | Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading |
| title_full | Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading |
| title_fullStr | Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading |
| title_full_unstemmed | Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading |
| title_short | Spectrally Efficient DMT Operation With BER-Informed Dynamic Bit and Power Loading |
| title_sort | spectrally efficient dmt operation with ber informed dynamic bit and power loading |
| topic | Bit error rate (BER)–aware bit loading discrete multitone (DMT) orthogonal frequency-division multiplexing (OFDM) power loading transceiver |
| url | https://ieeexplore.ieee.org/document/9953993/ |
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