Title :
Advantages of superimposed packets allocation for OFDM-CDM
Author :
Arkhipov, Alexander ; Raulefs, Ronald ; Schnell, Michael
Author_Institution :
Inst. of Commun. & Navigation, German Aerosp. Center, Wessling, Germany
fDate :
30 May-1 June 2005
Abstract :
In this paper, superimposed packets allocation for orthogonal frequency-division multiplexing code-division multiplexing (OFDM-CDM) is presented. An iterative algorithm, which is a combination of parallel interference cancellation (PIC) and automatic repeat request (ARQ) based on soft value combining (SVC) is proposed and its performance studied and compared with other existing ARQ schemes. In the proposed algorithm, reliability information of erroneously received copies of the same data packet is exploited to improve the quality of interference cancellation. As a result, the proposed algorithm outperforms conventional ARQ based on a SVC as well as ARQ based on maximum ratio combining (MRC).
Keywords :
OFDM modulation; automatic repeat request; code division multiplexing; diversity reception; interference suppression; iterative decoding; OFDM-CDM; automatic repeat request; iterative algorithm; maximum ratio combining; orthogonal frequency-division multiplexing code-division multiplexing; parallel interference cancellation; soft value combining; superimposed packets allocation; Automatic repeat request; Code division multiplexing; Cyclic redundancy check; Decoding; Error correction; Frequency division multiplexing; Interference cancellation; Iterative algorithms; Static VAr compensators; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543908
