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AHO-OFDM Dimming PDF

This document studies the performance of AHO-OFDM dimming compared to spectral efficiency. It presents data on different target dimming levels from 2% to 98% and the corresponding modulation schemes, spectral efficiencies for ACO-OFDM, PAM-DMT, and AHO-OFDM. It shows that AHO-OFDM achieves higher spectral efficiency than ACO-OFDM and PAM-DMT across all dimming levels due to its ability to combine the modulation schemes.

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Rashed Islam
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69 views1 page

AHO-OFDM Dimming PDF

This document studies the performance of AHO-OFDM dimming compared to spectral efficiency. It presents data on different target dimming levels from 2% to 98% and the corresponding modulation schemes, spectral efficiencies for ACO-OFDM, PAM-DMT, and AHO-OFDM. It shows that AHO-OFDM achieves higher spectral efficiency than ACO-OFDM and PAM-DMT across all dimming levels due to its ability to combine the modulation schemes.

Uploaded by

Rashed Islam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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AHO-OFDM Dimming vs.

Spectral Efficiency Performance Study

Target Target M- M- SE_ACO- SE_PAM- SE_AHO-  ACO  PAM Bias  ACO  PAM Dimming Subcarrier
Dimming BER QAM PAM OFDM DMT OFDM   Bias Level (%) and
2 2
Level (%) ACO- PAM- (Mean) Symbol
OFDM DMT
2 103 4 2 0.5 0.25 0.75 0.0221 0.0156 0.0200 0.0201 0.0230 512,20
5 103 16 4 1.0 0.5 1.5 0.0495 0.0348 0.0600 0.06588 0.06588 512,20
10 103 32 4 1.25 0.5 1.75 0.0699 0.0348 0.1000 0.1008 0.1140 512,20
20 103 64 4 1.5 0.5 2.0 0.1011 0.0348 0.2000 0.2015 0.2265 512,20
30 103 64 4 1.5 0.5 2.0 0.1014 0.0349 0.3000 0.3015 0.3265 512,20
40 103 64 8 1.5 0.75 2.25 0.1011 0.0714 0.4000 0.4007 0.4119 512,20
50 103 64 8 1.5 0.75 2.25 0.1010 0.0720 0.5000 0.5006 0.5117 512,20
60 103 64 8 1.5 0.75 2.25 0.1012 0.0718 0.6000 0.6007 0.6117 512,20
70 103 16 16 1.0 1.0 2.0 0.0494 0.1440 0.7000 0.6979 0.6623 512,20
80 103 16 16 1.0 1.0 2.0 0.0491 0.1433 0.8000 0.7979 0.7626 512,20
90 103 8 16 0.75 1.0 1.75 0.0542 0.2028 0.9000 0.8954 0.8405 256,20
95 103 4 16 0.5 1.0 1.5 0.0313 0.2022 0.9500 0.9447 0.8819 256,20
98 103 2 4 0.25 0.5 0.75 0.0442 0.0969 0.9800 0.9766 0.9532 64,20

Spectral Efficiency (bit/s/Hz)


3.5
SNR is varied from 1 to 40dB.
3
log 2 M  PAM
PAM  2.5
4 2

log 2 M  QAM 1.5


ACO  1
4
0.5
AHO  ACO  PAM 0
0 20 40 60 80 100
Without normalization and scaling factor. η(%)

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