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In this letter we present a new approach to designing codes with spectral efficiencies between 0.5 and 1 bit/dimension using multilevel signaling. Traditionally, code design techniques for these rates use high rate codes with binary signaling. However, from constrained channel capacity results, we know that for spectral efficiencies between 0.5 and 1 bit/dimension, the use of low rate codes with multilevel signaling can result in significant gains compared to the conventional approach. We present several examples of bit interleaved coded modulation using low rate turbo codes and a 16QAM signal set that demonstrate this advantage.
Published in:
Communications Letters, IEEE
(Volume:9
,
Issue:
2
)
Date of Publication: Feb. 2005
- Page(s):
- 166 - 168
- ISSN :
- 1089-7798
- INSPEC Accession Number:
- 8326392
- Digital Object Identifier :
- 10.1109/LCOMM.2005.02028
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 31 January 2005
- Issue Date :
- Feb. 2005
- Sponsored by :
- IEEE Communications Society
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