TY - GEN
T1 - ML Iterative Tentative-Decision-Directed (ML-ITDD)
T2 - 11th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2004
AU - Rahamim, Yossef
AU - Freedman, Avraham
AU - Reichman, Arie
PY - 2004
Y1 - 2004
N2 - The invention of Turbo Codes has manifested the ability of communications systems to operate at very low signal to noise ratio, very close to the theoretical Shannon capacity limit. However, synchronization of turbo-coded signals operating in low SNR conditions may be difficult, especially for short packet transmission. This paper proposes the Maximum-Likelihood Iterative-Tentative-Decision-Directed (ML-ITTD) circuit for using the tentative decisions produced by the turbo decoder to improve the carrier synchronization in turbo coded short packets communication systems. The ML-ITDD method operates iteratively and jointly with the turbo decoder, enhancing both the turbo-decoder and the synchronization performance. The ML-ITDD method has been shown by simulation to significantly increase the allowed initial frequency and phase uncertainty region, thus allowing the use of very short training sequences for initial carrier synchronization.
AB - The invention of Turbo Codes has manifested the ability of communications systems to operate at very low signal to noise ratio, very close to the theoretical Shannon capacity limit. However, synchronization of turbo-coded signals operating in low SNR conditions may be difficult, especially for short packet transmission. This paper proposes the Maximum-Likelihood Iterative-Tentative-Decision-Directed (ML-ITTD) circuit for using the tentative decisions produced by the turbo decoder to improve the carrier synchronization in turbo coded short packets communication systems. The ML-ITDD method operates iteratively and jointly with the turbo decoder, enhancing both the turbo-decoder and the synchronization performance. The ML-ITDD method has been shown by simulation to significantly increase the allowed initial frequency and phase uncertainty region, thus allowing the use of very short training sequences for initial carrier synchronization.
KW - Packet Radio
KW - Phase and Frequency Synchronization
KW - Turbo Coding
UR - http://www.scopus.com/inward/record.url?scp=27644523242&partnerID=8YFLogxK
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AN - SCOPUS:27644523242
SN - 0780387155
SN - 9780780387157
T3 - 11th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2004
SP - 346
EP - 349
BT - 11th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2004
Y2 - 13 December 2004 through 15 December 2004
ER -