Title :
A maximal ratio combining frequency diversity ARQ scheme for OFDM signals
Author :
Kumagai, Tomoaki ; Mizoguchi, Masato ; Onizawa, Takeshi ; Takanashi, Hitoshi ; Morikura, Masahiro
Author_Institution :
NTT Wireless Syst. Labs., Yokosuka, Japan
Abstract :
This paper proposes a maximal ratio combining (MRC) frequency diversity automatic-repeat-request (ARQ) scheme which is suitable for high data rate orthogonal frequency division multiplexing (OFDM) signals. The proposed scheme regularly changes the subcarrier assignment pattern at every retransmission. This scheme sharply reduces the number of ARQ retransmissions in slow fading environments by virtue of the frequency diversity effect. Computer simulation results show that the proposed scheme reduces the number of retransmissions to about 3 at the accumulative correct packet reception rate (ACPRR) of 0.99 while the conventional schemes lead to more than 10
Keywords :
OFDM modulation; automatic repeat request; diversity reception; fading channels; packet radio networks; OFDM signals; accumulative correct packet reception rate; automatic-repeat-request; computer simulation results; frequency diversity ARQ; high data rate; maximal ratio combining; orthogonal frequency division multiplexing; retransmission; slow fading environments; subcarrier assignment pattern; Automatic repeat request; Delay; Demodulation; Diversity reception; Fading; Frequency diversity; OFDM modulation; Phase modulation; Throughput; Transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.734257
