DocumentCode :
382559
Title :
An adaptive data transmission scheme for OFDM systems
Author :
Dobre, Octavia Adina ; Yao, Yu-Dong
Author_Institution :
Dept. of Electron. in Transports, Politehnic Univ. of Bucharest, Romania
Volume :
3
fYear :
2002
fDate :
2002
Firstpage :
1398
Abstract :
This paper proposes adaptive data transmission schemes for orthogonal frequency division multiplexing (OFDM) systems. The forward error correction (FEC) operation within the type I hybrid automatic repeat request (ARQ) protocol is performed on individual OFDM subchannels and the modulation scheme for each subchannel changes adaptively according to the error statistics of the received data blocks. An efficient method to coordinate different subchannels for retransmissions is explored. The system throughput efficiency is derived and compared for three schemes, i.e., a basic scheme (BS), a scheme with adaptive modulation (AMS) and a scheme with adaptive modulation and efficient subcarrier retransmissions (AMSCR). Numerical results show that significant performance improvements are achieved with AMSCR under a wide range of channel conditions.
Keywords :
OFDM modulation; adaptive modulation; automatic repeat request; data communication; error statistics; forward error correction; telecommunication traffic; AMS; AMSCR; ARQ protocol; FEC; OFDM systems; adaptive data transmission; adaptive modulation; error statistics; forward error correction; orthogonal frequency division multiplexing; performance improvements; subcarrier retransmissions; subchannels; system throughput efficiency; type I hybrid automatic repeat request; Automatic repeat request; Cyclic redundancy check; Data communication; Data engineering; Error analysis; Forward error correction; Frequency domain analysis; Information systems; OFDM modulation; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th
ISSN :
1090-3038
Print_ISBN :
0-7803-7467-3
Type :
conf
DOI :
10.1109/VETECF.2002.1040445
Filename :
1040445
Link To Document :
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