Title :
The Application of the MI-Based Link Quality Model for Link Adaptation of Rate Compatible LDPC Codes
Author :
Chen, Xiang ; Fei, Zesong ; Kuang, Jingming ; Sun, Wei ; Wan, Lei
Author_Institution :
Dept. of E. E. Beijing Inst. of Technol. Beijing, Modern Commun. Lab., Beijing
Abstract :
An accurate and simple link quality model is crucial in system evaluation of different link adaptation (LA) solutions, for it acts as a link-to-system (L2S) interface which provides the block-error rate (BLER) performance of a certain modulation coding scheme (MCS) corresponding to the current SINR states. Our previous work in the work of Chen et al. (2007) has verified the good accuracy of the MI-based model for rate compatible LDPC coded OFDM system. In this paper, adaptive modulation and coding (AMC) strategy and two hybrid ARQ schemes of variable retransmission length, partial chase combining and full incremental redundancy, have been designed to check the accuracy of the look-up tables (LUTs) obtained by the MI-based model. The predicted results are quite in accord with the simulation ones, which confirms that the MI- based model provides accurate and simple LUTs for LA design of LDPC codes.
Keywords :
OFDM modulation; adaptive codes; adaptive modulation; error statistics; modulation coding; parity check codes; radio links; table lookup; MI-based link quality; OFDM system; adaptive modulation and coding; block-error rate; hybrid ARQ; link adaptation; link-to-system interface; look-up table; modulation coding scheme; mutual-information model; rate compatible LDPC code; variable retransmission length; AWGN; Adaptation model; Automatic repeat request; Forward error correction; Modulation coding; OFDM; Parity check codes; Predictive models; Sun; Table lookup;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.165
