By Topic

Performance of a VSF-OFCDM system using a symbol relocated scheme during retransmission

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Xiaoming Peng ; Inst. for Infocomm Res., Singapore, Singapore ; Chin, F.P.S. ; Madhukumar, A.S.

A symbol-relocated (SR) scheme has been proposed for variable spreading factor orthogonal frequency code-division multiplex systems to achieve frequency diversity during retransmission. The performance has been evaluated for two combining schemes of hybrid auto repeat request, namely chase combining and incremental redundancy. The results show that the proposed SR scheme achieves significant improvement in terms of system throughput over conventional schemes. This effect is more significant for chase combining because the rotated mechanism is more effective when the same packet is transmitted during the retransmission. It is also found that the SR scheme is not sensitive to Doppler frequency variation, which makes it an attractive candidate for fast-fading channels. Further investigation also suggests the suitability of an SR scheme for smaller spreading factors (in the frequency domain) and larger coding rates.

Published in:

Communications, IEE Proceedings-  (Volume:152 ,  Issue: 2 )