Abstract
The newly developed 2nd generation standard for digital video broadcasting (DVB-T2) emerges as a significant upgrade over its first generation predecessor DVB-T. The DVB-T2 standard targets an increased system throughput by at least 30% over the DVB-T. This article introduces algorithms in the signal processing chain to improve the mobile operation for DVB-T2. The proposed modified synchronization blocks, along with the improved channel estimation, show significant improvement compared to the results reported in the DVB-T2 implementation guide. In addition, state-of-the-art low-complexity algorithms in the bit processing chain, particularly in the LDPC decoder, are used to provide robustness and support throughput increase, while reducing the implementation complexity. The integrated system is simulated including implementation effects. The simulation results confirm the enhanced performance of the developed integrated model and provide better results compared to those reported in literature.
Highlights
The first generation terrestrial digital video broadcasting standard, DVB-T, introduced a breakthrough in TV transmission with well-structured transmission chain that is based on OFDM and powerful forward error correction
Channel estimation The channel estimation suggested by the DVB-T2 implementation guide is a linear interpolation channel estimator in both time and frequency directions, which has the advantage of low complexity but its performance is very poor in fading channels
The first is to provide improved performance suitable for mobile channel conditions and the second is to preserve the low implementation complexity mandated by the nature of a mobile device
Summary
The first generation terrestrial digital video broadcasting standard, DVB-T, introduced a breakthrough in TV transmission with well-structured transmission chain that is based on OFDM and powerful forward error correction. This article focuses on improving the performance of channel estimation and synchronization blocks along with a low-complexity LDPC decoder. The remainder of the article is organized as follows: Section 2 is dedicated to the improvement in the receiver signal processing chain, namely, the introduced algorithms for synchronization and channel estimation.
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