TY - GEN
T1 - Link adaptation of rate-compatible LDPC coded OFDM system based on minus exponential effective-SNR mapping link quality model
AU - Chen, Xiang
AU - Fei, Zesong
AU - Sun, Wei
AU - Kuang, Jingming
PY - 2008
Y1 - 2008
N2 - An precise but simple link quality model is crucial to improve the accuracy and flexibility of link adaptation design of LDPC coded OFDM system, because it acts as a link-to-system interface which provides system simulator immediately the BLER performance of a certain modulation and coding scheme corresponding to the current SINR states, which is an instantaneous vector. This contribution extends the classical exponential effective-SNR mapping model to rate-compatible LDPC codes. Theoretical analysis and simulation results indicate that the EESM model eliminates the influence of different modulation modes and channel states, by selecting proper modulation and coding adjusting factors. Therefore it can be treated as an accurate link to system interface for LDPC coded OFDM system. Furthermore adaptive modulation and coding scheme is designed to verify the accuracy of the model. The predicted results match the simulation ones very well, both over AWGN and TU50 channels, which confirms that the EESM model offers accurate and convenient look-up tables for LA design of LDPC coded OFDM system.
AB - An precise but simple link quality model is crucial to improve the accuracy and flexibility of link adaptation design of LDPC coded OFDM system, because it acts as a link-to-system interface which provides system simulator immediately the BLER performance of a certain modulation and coding scheme corresponding to the current SINR states, which is an instantaneous vector. This contribution extends the classical exponential effective-SNR mapping model to rate-compatible LDPC codes. Theoretical analysis and simulation results indicate that the EESM model eliminates the influence of different modulation modes and channel states, by selecting proper modulation and coding adjusting factors. Therefore it can be treated as an accurate link to system interface for LDPC coded OFDM system. Furthermore adaptive modulation and coding scheme is designed to verify the accuracy of the model. The predicted results match the simulation ones very well, both over AWGN and TU50 channels, which confirms that the EESM model offers accurate and convenient look-up tables for LA design of LDPC coded OFDM system.
KW - Link adaptation
KW - Link quality model (LQM)
KW - Minus exponential effective-SNR mapping (EESM) model
KW - OFDM
KW - Rate-compatible (RC)-LDPC codes
UR - http://www.scopus.com/inward/record.url?scp=58049090974&partnerID=8YFLogxK
U2 - 10.1109/WiCom.2008.374
DO - 10.1109/WiCom.2008.374
M3 - Conference contribution
AN - SCOPUS:58049090974
SN - 9781424421084
T3 - 2008 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2008
BT - 2008 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2008
T2 - 2008 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2008
Y2 - 12 October 2008 through 14 October 2008
ER -