TY - GEN
T1 - Decision directed channel tracking for MIMO-constant envelope modulation
AU - Mohamed, Ehab Mahmoud
AU - Muta, Osamu
AU - Furukawa, Hiroshi
PY - 2011
Y1 - 2011
N2 - The authors have proposed Multi-Input Multi-Output (MIMO)-Constant Envelope Modulation, MIMO-CEM, as power and complexity efficient alternative to MIMO-OFDM, suitable for wireless backhaul networks. Because MIMO-CEM receiver employs 1-bit ADC, MIMO-CEM channel estimation is one of the major challenges toward its real application. The authors have proposed adaptive channel estimator in static and quasi-static channel conditions. Although wireless backhaul channel conditions are theoretically considered as static and quasi-static, it suffers from some channel fluctuations in real applications. Hence, the objective of this paper is to present a decision directed channel estimation (DDCE) to track channel fluctuation in high Doppler frequency condition, and clarify the effectiveness of our method under dynamic channel. For the purpose of comparison, the performance of DDCE is compared with that of a pilot assisted linear interpolation channel tracking for MIMO-CEM. Different Doppler frequencies are assumed to prove the effectiveness of the scheme even in high channel variations.
AB - The authors have proposed Multi-Input Multi-Output (MIMO)-Constant Envelope Modulation, MIMO-CEM, as power and complexity efficient alternative to MIMO-OFDM, suitable for wireless backhaul networks. Because MIMO-CEM receiver employs 1-bit ADC, MIMO-CEM channel estimation is one of the major challenges toward its real application. The authors have proposed adaptive channel estimator in static and quasi-static channel conditions. Although wireless backhaul channel conditions are theoretically considered as static and quasi-static, it suffers from some channel fluctuations in real applications. Hence, the objective of this paper is to present a decision directed channel estimation (DDCE) to track channel fluctuation in high Doppler frequency condition, and clarify the effectiveness of our method under dynamic channel. For the purpose of comparison, the performance of DDCE is compared with that of a pilot assisted linear interpolation channel tracking for MIMO-CEM. Different Doppler frequencies are assumed to prove the effectiveness of the scheme even in high channel variations.
KW - adaptive channel estimation
KW - Constant envelope modulation
KW - Decision directed channel tracking
KW - Low resolution ADC
KW - MIMO
UR - https://www.scopus.com/pages/publications/79960074625
U2 - 10.1007/978-3-642-21984-9_51
DO - 10.1007/978-3-642-21984-9_51
M3 - Conference contribution
AN - SCOPUS:79960074625
SN - 9783642219832
T3 - Communications in Computer and Information Science
SP - 619
EP - 633
BT - Digital Information and Communication Technology and Its Applications - International Conference, DICTAP 2011, Proceedings
T2 - International Conference on Digital Information and Communication Technology and Its Applications, DICTAP 2011
Y2 - 21 June 2011 through 23 June 2011
ER -