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For digital terrestrial television broadcasting (DT-TB) systems, orthogonal frequency division multiplexing (OFDM) technique is considered to be an effective method to combat the frequency selective channel cause by multi-path effect. In the single frequency network (SFN) scenario, Alamouti space frequency block coding (SFBC) is introduced to provide spatial diversity gain and improve the link stability...
The amplitude phase shift keying (APSK) constellation with Gray labeling (Gray-APSK) is able to achieve considerable shaping gains in comparison with the quadrature amplitude modulation (QAM) counterpart under both iterative and non-iterative scenarios. Nevertheless, the Gray-APSK constellation with the fixed radius cannot provide the optimal performance for every code rate of practical usage. In...
In this paper, a measurement method for DTMB modulator which performs the estimation of timing and frequency offsets, channel impulse response (CIR), as well as modulation error ratio (MER) by using only two consecutive frames in an iterative manner is proposed to precisely measure the modulator performance in short time. Both simulation and lab testing results show that the measurement method could...
This paper summarizes some key features for future Chinese digital television terrestrial broadcasting (DTTB) systems including improved frame structure, transmit diversity, advanced channel coding and modulation, multi-service support, broadcasting return channel solution and etc.
Through the investigation on frame header (FH) structures of DTMB system, i.e. the digital terrestrial television broadcasting standard of China, spectrum sensing methods based on PN cross-correlation (PNCC) are proposed for all FH options. Miss-detection probability, decision threshold and sensing time requirement of the proposed methods are analyzed in detail. Comparisons on spectrum sensing performance,...
In this paper, we present and analyze the results of MING-T project, sponsored by EU with partners from several countries in Europe and China. The results include both the field trials and the indoor experiments covering four key technologies developed in the project: reliable data services in broadcast networks, interactive services in broadcast networks, handover between DVB-H and DTMB, scalable...
Chinese digital television terrestrial broadcasting (DTTB) standard, digital terrestrial/television multimedia broadcasting (DTMB), recommends three padding modes of guard intervals (GI) with PN420/595/945 as training sequences for multi-carrier or single-carrier block transmission. At receiver side, mode detection should be done before subsequent synchronization and channel estimation. Simple and...
We address in this paper the convergence issue of DTMB and DVB-H, which are the digital broadcast standards of China and Europe respectively. After thorough study on the similarities as well as the differences between the two standards in the physical layer, we proposed our very preliminary ideas to combine the two systems into a single device effectively as well as efficiently and this work is supported...
Using Digital Multimedia Broadcast-Terrestrial (DMB-T) system from Tsinghua University, two-way (frequency division duplex) digital video transmission over medium-voltage power cables of up to 700 m-long was successfully demonstrated. The preliminary experiments validate the feasibility of using Time-Domain Synchronous Orthogonal Frequency Division Multiplexing (TDS-OFDM) technology, a core technology...
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