Referenced Items are not available for this document.
As an alternative to trellis coding, a binary convolutional code is considered for use with such nonbinary modulation schemes as quadrature amplitude modulation (QAM). A Gray code is used to map the encoder output to the M-ary QAM constellation. The focus is on the design of 16-ary coded QAM with a rate 3/4 punctured convolutional code of a constraint length 7. A quantized binary metric generation method is proposed and shown to be suboptimum as compared to the direct use of a M-ary unquantized metric. Impressive coding gains and bandwidth efficiency are shown in comparison with uncoded systems
Published in:
Communications, IEEE Transactions on
(Volume:43
,
Issue:
6
)
Date of Publication: Jun 1995
- Page(s):
- 2001 - 2004
- ISSN :
- 0090-6778
- INSPEC Accession Number:
- 4994730
- Digital Object Identifier :
- 10.1109/26.387437
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Jun 1995
- Sponsored by :
- IEEE Communications Society
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