Paper Info
Title
Performance studies of a VSF-OFCDM system using a symbol relocated scheme during retransmission
Abstract
In this paper, a symbol relocated (SR) scheme has been proposed for variable spreading factor orthogonal frequency code division multiplexing (VSF-OFCDM) systems to achieve frequency diversity during retransmission. The performance has been evaluated for two combining schemes of hybrid auto repeat request (ARQ) namely chase combining and incremental redundancy. The results show that the proposed SR scheme achieves significant improvement in terms of system throughput over the 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 SR scheme is not sensitive to Doppler frequency variation, which makes SR scheme an attractive candidate for fast fading channels. Further investigations also suggest the suitability of the SR scheme for smaller spreading factors (in frequency domain) and larger coding rates.
Year
DOI
Venue
2005
10.1109/WCNC.2005.1424669
WCNC
Keywords
Field
DocType
variable spreading factor,diversity reception,code division multiplexing,system throughput,fading channels,ofdm modulation,frequency diversity,vsf-ofcdm system,spread spectrum communication,packet radio networks,fast fading channels,doppler frequency variation,incremental redundancy,retransmission,rotated mechanism,orthogonal frequency code division multiplexing,hybrid auto repeat request,symbol relocated scheme,code division multiple access,arq,automatic repeat request,telecommunication traffic,packet transmission,coding rates,chase combining,performance,strontium,ofdm,frequency domain,fading channel,redundancy,fading,throughput
Frequency domain,Diversity scheme,Fading,Retransmission,Computer science,Computer network,Automatic repeat request,Code division multiple access,Orthogonal frequency-division multiplexing,Spread spectrum
Conference
Volume
ISSN
ISBN
2
1525-3511
0-7803-8966-2
Citations 
PageRank 
References 
2
0.43
2
Authors
3
Name
Order
Citations
PageRank
Xiaoming Peng19520.72
Francois P. S. Chin233047.00
A. S. Madhukumar330258.07