• Journal of the Institute of Electronics Engineers of Korea SP
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• v.39 no.6
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• pp.718-726
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• 2002

This paper presents a novel Viterbi decoding architecture for European Digital Video Broadcasting (DVB) receiver. The channel sate information (CSI) of each sub carrier is used to weight the bit-metric of each symbol. The weighted bit-metric is delivered to Viterbi decoder after going through the symbol deinterleaver and bit deinterleaver, such that the CSI can be correctly applied to corresponding bits even after the two interleavings. Simulation shows that the new architecture gives significant performance enhancement of 6~13dB in Rayleigh fading channels depending on the modulation types. This results is also better than previous results by 3.7~10.3dB.

• Proceedings of the IEEK Conference
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• 2004.06a
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• pp.11-14
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• 2004

Digital Video Broadcasting - Satellite (DVB-S) [1] (EN 300 421(bibliography)) was introduced as a standard in 1994. However, by combing with higher order modulation, promise more powerful alternatives to the DVB-S / DVB-DSNG coding and modulation schemes. Variable rate coding and modulation (VCM) may employed to provide different levels of error protection to different service components. Adaptive coding and modulation (ACM) provides more exact channel protection and dynamic link adaptation to propagation conditions, targeting each individual receiving terminal. By these reasons, DVB-S2 introduced. This paper derives exact symbol error rate(SER) of 16-Amplitude Phase Shift Keying(APSK) modulation by using Craig's formula. 16-APSK modulation is used in DVB-S2. The difference between Union Bound and Craig's formula is 1.26dB in low SNR and 0.1dB in high SNR.

• Journal of Digital Contents Society
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• v.19 no.9
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• pp.1671-1677
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• 2018

The advertisement market is an industry that is heavily influenced by media changes. As the digital broadcasting has settled, TV, a typical advertisement medium, has evolved from a passive content consuming medium into a platform for operating various data services as well as broadcasting programs. These changes mean that viewers are able to actively consume TV contents including advertisement, so the broadcasting industry needs to consider about the growth strategies that link the advertisement market with data services. This study designed a digital broadcasting data service that provides supplementary information of ID advertisement with short exposure time (less than 10 seconds) and insufficient space (less than 1/4 of TV screen). Specifically, we designed the user scenario and user interface of the data service, defined representative types of ID advertisement and the supplementary information for each type, developed a method, based on the international digital broadcasting standard DVB, for providing the supplementary information to the data service.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.446-450
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• 2002

아날로그 방송에서 디지털 방송으로의 전환은 흑백 TV에서 칼라 TV로의 전환보다 더욱 혁신적인 변화이다. 이러한 디지털 방송 기술의 핵심이 되고 있는 것이 바로 서비스정보(Sl : Service Information)이다. 본 논문에서는 국내 위성방송 표준인 유럽방식의 디지털 방송(DVB : Digital Video Broadcasting)에 대한 서비스정보 수신기의 효과적인 구조 및 구현 방법을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.05a
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• pp.345-348
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• 2001

The paper describes the physical design flow & verification of Digital Video Broadcasting(DVB) compliant satellite receiver chip. It includes problems and issues of earth design flow, verification process for physical layout.

• ETRI Journal
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• v.24 no.3
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• pp.251-254
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• 2002

We developed a method for optimal superframe design in the multi-frequency time division multiple access (MF-TDMA) return-link of a satellite multimedia interactive network called a digital video broadcasting return channel over satellite (DVB-RCS) sub-network. To find the optimal superframe pattern with the maximum data throughput, we formulated the design problem as a non-linear combinatorial optimization problem. We also devised the proposed simple method so that it would have field applicability for improving radio resource utilization in the MF-TDMA return link.

• Information and Communications Magazine
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• v.26 no.10
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• pp.40-45
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• 2009

차세대 유럽형 디지털 지상파 TV 표준인 DVB-T2 (Digital Video Broadcasting; a 2nd Generation Terrestrial)는 아날로그 TV시대의 끝을 알리는 ASO(Analogue Switch Off)에 의해 새롭게 확보될 방송 주파수를 통해 다채널 HDTV 서비스와 다양한 데이터 서비스를 제공해줄 것으로 예상된다. DVB-T2는 DVB-T에 비해 전송효율을 30% 이상 향상시켰으며 기존 송신 인프라와 수신안테나를 그대로 사용할 수 있어 상업화 조건을 고루 갖추고 있다고 볼 수 있다. 본고에서는 이러한 DVB-T2 End-to-End 체인 참조모델을 간략히 소개하고 송신기술에 대해 개괄적으로 설명한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.4
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• pp.646-651
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• 2003

In this paper, we investigate the performance comparisons of various turbo interleavers which are adopted as a standard such as IMT-2000 and satellite DVB(digital video broadcasting). The bit error rate performance is calculated by the fixed point computer simulations over Rayleigh fading channels. For a fair comparison, the simulation is performed on the basis of equal the interleaver size as we can. From the results, it is shown that the turbo interleaver in W-CDMA outperforms the turbo interleavers in CDMA2000 and satellite DVB. The performance gains are even larger as the interleaver size is increased.

• Proceedings of the KIEE Conference
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• 2006.04a
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• pp.87-89
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• 2006

A handover for DVB-H(Digital Video Broadcasting for Handheld) is the action of switching a receiver from receiving one signal to receiving another, when moving between the border of their coverage areas. This paper proposes new approaches for improving loss-free handover performance in the DVB-H networks. The proposed handover schemes are targeted to two different DVB-H receivers: One is for the receivers equipped with GPS devices. The other is for ones without GPS support. The first handover approach modifies the cell description table(CDT) proposed in the literature[1]. The second proposes a novel handover region estimation technique based on a new handover map table(HMT). This new handover approach estimates a predefined hand over region described in the HMT using measured RSSIs signal patterns. The estimation success rate is simulated and the benefits of the proposed method are discussed considering time and power consumption.

• Aerospace Engineering and Technology
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• v.12 no.2
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• pp.156-162
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• 2013

In the communication between satellite and ground station, data rate can be determined from the data volume and required transmission time. Increasing data rate can be limited according to the available bandwidth. For the reason, it has been popularly studying on high spectral-efficient modulation scheme in large volume data application such as digital video broadcasting service. This paper presents the conceptual design of UHRIT broadcasting in GEO-KOMPSAT-2A (GK2A) mission by using DVB-S2 standard. Based on the recently determined data rate, UHRIT bandwidth was calculated at the various modulation schemes and code rates of DVB-S2 standard. Receiving performance of global user station was also evaluated thorough link analysis by considering that user station is located at the edge of beam coverage. Finally, maximum data rate was analyzed in a situation that COMS HRIT bandwidth should be alternatively applied for UHRIT downlink.