Algebraic Hybrid Satellite-Terrestrial Space-Time Codes for Digital Broadcasting in SFN

: Hollanti Camilla, Vehkalahti Roope, Nasser Youssef

: 2011

: IEEE Workshop on Signal Processing Systems (SiPS)

: Signal Processing Systems (SIPS), 2011 IEEE Workshop on

: 2011 IEEE WORKSHOP ON SIGNAL PROCESSING SYSTEMS (SIPS)

: IEEE WRK SIG PRO SYS

: 234

: 238

: 978-1-4577-1920-2

: 2162-3562

Lately, different methods for broadcasting future digital TV in a single frequency network (SFN) have been under an intensive study. To improve the transmission to also cover suburban and rural areas, a hybrid scheme may be used. In hybrid transmission, the signal is transmitted both from a satellite and from a terrestrial site. In 2008, Y. Nasser et al. proposed to use a double layer 3D space-time (ST) code in the hybrid 4 x 2 MIMO transmission of digital TV. In this paper, alternative codes with simpler structure are proposed for the 4 x 2 hybrid system, and new codes are constructed for the 3 x 2 system. The performance of the proposed codes is analyzed through computer simulations, showing a significant improvement over simple repetition schemes. The proposed codes prove in addition to be very robust in the presence of power imbalance between the two sites.