TY - JOUR
T1 - Maximum Likelihood Synchronization for DVB-T2 in Unknown Fading Channels
AU - Zhang, Xin
AU - Liu, Jun
AU - Li, Hongbin
AU - Himed, Braham
N1 - Publisher Copyright:
© 1963-12012 IEEE.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - In this paper, we consider the timing and carrier frequency offset (CFO) estimation problem for digital video broadcasting-second generation terrestrial (DVB-T2) transmissions by utilizing the P1 symbol. Unlike previous studies, an unknown fading channel scenario is considered. Two maximum likelihood (ML) methods are derived by modeling the transmitted signal as a stochastic and, respectively, a deterministic unknown waveform. The proposed stochastic ML (SML) algorithm can jointly estimate the received signal power, time delay, and CFO. By ignoring the presence of null carriers in the P1 symbol, the SML method can be simplified with a lower complexity. Meanwhile, the proposed deterministic ML method is more flexible and computationally simpler compared with the SML method. Numerical results are presented to illustrate the performances of the proposed estimators along with several existing solutions for DVB-T2 signal synchronization. In addition, Cramér-Rao lower bounds are evaluated for the considered estimation problem.
AB - In this paper, we consider the timing and carrier frequency offset (CFO) estimation problem for digital video broadcasting-second generation terrestrial (DVB-T2) transmissions by utilizing the P1 symbol. Unlike previous studies, an unknown fading channel scenario is considered. Two maximum likelihood (ML) methods are derived by modeling the transmitted signal as a stochastic and, respectively, a deterministic unknown waveform. The proposed stochastic ML (SML) algorithm can jointly estimate the received signal power, time delay, and CFO. By ignoring the presence of null carriers in the P1 symbol, the SML method can be simplified with a lower complexity. Meanwhile, the proposed deterministic ML method is more flexible and computationally simpler compared with the SML method. Numerical results are presented to illustrate the performances of the proposed estimators along with several existing solutions for DVB-T2 signal synchronization. In addition, Cramér-Rao lower bounds are evaluated for the considered estimation problem.
KW - Digital TV broadcast
KW - maximum likelihood estimation
KW - synchronization
UR - http://www.scopus.com/inward/record.url?scp=84960286363&partnerID=8YFLogxK
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U2 - 10.1109/TBC.2015.2482018
DO - 10.1109/TBC.2015.2482018
M3 - Article
AN - SCOPUS:84960286363
SN - 0018-9316
VL - 61
SP - 615
EP - 624
JO - IEEE Transactions on Broadcasting
JF - IEEE Transactions on Broadcasting
IS - 4
M1 - 7299620
ER -