DocumentCode
1100496
Title
Trans-Modulation in Wireless Relay Networks
Author
Seddik, Karim G. ; Ibrahim, Ahmed S. ; Liu, K.J.R.
Author_Institution
Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA
Volume
12
Issue
3
fYear
2008
fDate
3/1/2008 12:00:00 AM
Firstpage
170
Lastpage
172
Abstract
In this letter, we consider the trans-modulation design for the decode-and-forward relay networks. We propose to reassign the constellation points at the relay nodes to minimize the symbol error rate (SER) at the destination node. The proposed trans-modulation scheme can significantly improve the system SER performance without increasing the complexity of the system, especially when the relays are close to the source. For this case, improvements of about 2 dB for 16-QAM constellation and about 3 dB for 64-QAM constellation are achieved for the single-relay case.
Keywords
quadrature amplitude modulation; radio networks; 16-QAM constellation; decode-and-forward relay networks; symbol error rate; transmodulation design; wireless relay networks; AWGN; Automatic repeat request; Bit error rate; Decoding; Error analysis; Euclidean distance; Relays; Transmitters; Transmitting antennas; Wireless application protocol;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2008.071734
Filename
4471951
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