Referenced Items are not available for this document.
This letter is concerned with the soft-input soft-output (SISO) demodulation of M-ary (M = 2r) orthogonal modulation. We prove that the SISO orthogonal demodulation (SISO-OD) is equivalent to the SISO decoding of orthogonal Hadamard codes, for which we deduct a posteriori probability fast Hadamard transform (APP-FHT) algorithm. With FHT and the proposed APP-FHT, the demodulation complexity can be reduced from O(r2r) to O(2r) exponential/logarithm operations and O(r22r) to O(2r) additions, respectively.
Published in:
Communications Letters, IEEE
(Volume:11
,
Issue:
12
)
Date of Publication: December 2007
- Page(s):
- 919 - 921
- ISSN :
- 1089-7798
- INSPEC Accession Number:
- 9736098
- Digital Object Identifier :
- 10.1109/LCOMM.2007.070802
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 12 December 2007
- Issue Date :
- December 2007
- Sponsored by :
- IEEE Communications Society
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