Performance Analysis of Hierarchical Modulation with Higher Spectrum Efficiency for a Higher Date Rate T-DMB System

In order to improve current transmission capacity of the ancillary data in terrestrial digital multimedia broadcasting (T-DMB) system, the hierarchical modulation is adopted. The hierarchical modulation consists of Higher-priority (HP) data, which is the same as in the legacy T-DMB, and Low-priority (LP) data, which carriers the additional data for the upgrade system, while the backward compatibility is guaranteed. Both QPSK modulation and 4ASK modulation are good candidates for LP data modulation. So in this paper we adopt coherent detection with comb-type pilot arrangement, the Least Squares (LS) estimate of pilot signals and the piecewise-linear interpolation channel estimation. Simulation results show that LP-QPSK provides a better choice than LP-4ASK for achieving a higher data rate in the Advance T-DMB (AT-DMB).

[1]  Han-gil Moon.  Backward-compatible terrestrial digital multimedia broadcasting system for multichannel audio service , 2010, IEEE Transactions on Consumer Electronics.

[2]  Jae Hong Lee,et al.  Development of Advanced Terrestrial DMB System , 2010, IEEE Transactions on Broadcasting.

[3]  Jun Sun,et al.  Model Checking Hierarchical Probabilistic Systems , 2010, ICFEM.

[4]  Paola Bisaglia,et al.  Simplified soft-output demapper for binary interleaved COFDM with application to HIPERLAN/2 , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[5]  Hyoung-Nam Kim,et al.  A Higher Data-Rate T-DMB System Based on a Hierarchical A-DPSK Modulation , 2009, IEEE Transactions on Broadcasting.

[6]  Hyoung-Nam Kim,et al.  Coded Decision-Directed Channel Estimation for Coherent Detection in Terrestrial DMB Receivers , 2007, IEEE Transactions on Consumer Electronics.

[7]  Li Ma,et al.  A kind of hierarchical data storage management system design for wireless sensor network , 2011, Proceedings of the 30th Chinese Control Conference.

[8]  Chul seung Kim,et al.  Hierarchical transmission algorithm in the advanced T-DMB system , 2010, 2010 Digest of Technical Papers International Conference on Consumer Electronics (ICCE).

[9]  Meng-Han Hsieh,et al.  Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels , 1998 .

[10]  Mike Brookes,et al.  Soft decisions for DQPSK demodulation for the Viterbi decoding of the convolutional codes , 2003, 2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)..