• Title/Summary/Keyword: ISDB

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A Small-Area ISDB-T Time Deinterleaver Structure with Buffer Transformation (버퍼 변환을 이용한 저면적 ISDB-T 시간 디인터리버 구조)

  • Kang, Hyeong-Ju
    • Journal of Advanced Navigation Technology
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    • v.15 no.2
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    • pp.227-233
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    • 2011
  • This paper presents a small-area ISDB-T time deinterleaver structure. ISDB-T is an mobile TV standard that is widely used in Japan and many South American countries. One of the strong points of the standard is the long interleaving depth, which enhance the communication performance. However, long interleaving requires many delay buffers, in other words many pointer registers. This paper reduces the number of pointer registers with the deinterleaver equivalent transformation. The experimental results show that the area is reduced with the proposed structure.

Development of Full Segment Digital Broadcast Receiver based on the ISDB-T (ISDB-T 기반의 FULL-SEG 방송 수신 장치 개발)

  • Ohm, Woo-Yong
    • Journal of the Institute of Electronics and Information Engineers
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    • v.54 no.1
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    • pp.139-146
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    • 2017
  • The ISDB-T(Integrated Service Digital Broadcasting Terrestrial) can be used in the multipath and impulsive noise, also it provide good performance over mobile reception environment since it use the OFDM(Orthogonal Frequency Division Multiplexing) based transmission technology and time interleaving technology. One segment and full segment are divided according to the number of the assigned segment. And one-segment broadcasting receiver can design and implement without high levels of technology than the full-segment broadcasting receiver using 64QAM(64 Quadrature Amplitude Modulation) since it uses QPSK(Quadrature Phase Shift Keying) modulation/demodulation. However, it has a constraint in the display size and resolution due to data-rate limits. In this paper, we design and implementation of full-segment ISDB-T receiver module which support HD resolution for set-top box, digital TV, navigation. In experimental results, the implemented full-segment ISDB-T receiver module was satisfactory for all of the desired functions.

Mobile Performance Evaluation of ISDB-T Full-Segment TV Receiver (ISDB-T 풀세그 TV 수신기 이동 성능 평가)

  • Gu, Young Mo
    • Journal of Broadcast Engineering
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    • v.23 no.2
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    • pp.293-301
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    • 2018
  • In ISDB-T, which is Japanese digital terrestrial TV specification based on OFDM technology, 6MHz bandwidth is divided into 13 segments. Twelve segments (full-seg) are used for high definition broadcasting for fixed receivers and one segment (one-seg) for mobile receivers. Though one-seg supports high speed mobility by using QPSK modulation, it is not suitable for large display mobile devices because of its low data rate. Full-seg using 64QAM modulation also suffers from its low mobile performance. In this paper, mobile performance of ISDB-T full-seg receiver is evaluated by applying sub-carrier interference removing scheme, high speed mobile channel estimation scheme and antenna diversity scheme.

Implementation of SNR Estimator for ISDB-T Systems (ISDB-T 시스템을 위한 SNR 추정기 구현)

  • Kim, Seongihl;Sohn, Chae-Bong
    • Journal of Broadcast Engineering
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    • v.18 no.6
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    • pp.927-934
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    • 2013
  • This paper aims to realize a Signal to Noise Ratio Estimator which constitutes a critical index of the broadcasting system in OFDM system with a synchronized type based on ISDB-T system. Of the elements which are comprising OFDM segments of ISDB-T system using the MSE algorithm suitable for ASIC design owing to its low complexity among a diverse SNR estimation methods, SNR estimation method using the broadcasting information data and the SNR estimation method using scattered pilot signal were realized by RTL. These two methods were compared in terms of their performance through simulation test not only in the AWGN channel which is an ideal channel, but also in SFN channel and frequency selective fading channel, which are distorted channels. Complexity of two methods were also compared through RTL realization. As a result of this comparison analysis, it was concluded that the SNR estimation method using scattered pilot signal shows more excellent performance and easiness in realization.

A Performance Comparison of Channel Estimation Methods for ISDB-T Systems (ISDB-T 시스템에서의 채널 추정기의 성능 비교)

  • Cho, Chang-Yeon;Kim, Joon-Tae
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.193-194
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    • 2008
  • In this paper, we compare the performance of the channel estimation methods with various interpolators for ISDB-T which is Japanese digital television terrestrial broadcasting systems. In this computer simulations, various interpolation methods are applied and the entire channel estimation performances according to the way of interpolation are compared.

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FUTURE BROADCASTING SERVICES AND MULTIMEDIA TECHNOLOGIES IN ISDB

  • Yanagimachi, Akio
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 1997.06a
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    • pp.1-11
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    • 1997
  • Although digitalization of broadcast waves is extending the multichannel programming capabilities of broadcasting, it does not fully exploit the potentiality of the digital evolution in broadcasting. ISDB has been put forth as second-generation digital broadcasting which offers a basis for a universal service in the future multimedia environment, and opens many new possibilities for services and their use. The paper is divided into three parts: A vision of the future of broadcasting, Evolution towards ISDB - integrated Services Television, and Technology development.

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A 85-mW Multistandard Multiband CMOS Mobile TV Tuner for DVB-H/T, T-DMB, and ISDB-T Applications with FM Reception

  • Nam, Ilku;Bae, Jong-Dae;Moon, Hyunwon;Park, Byeong-Ha
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.15 no.3
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    • pp.381-389
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    • 2015
  • A fully integrated multistandard multiband CMOS mobile TV tuner with small silicon area and low power consumption is proposed for receiving multiple mobile digital TV signals and FM signal. In order to reduce the silicon area of the multistandard multiband receiver, other RF front-end circuits except LNAs are shared and a local oscillator (LO) signal generation architecture with a single VCO for a frequency synthesizer is proposed. To reduce the low frequency noise and the power consumption, a vertical NPN BJT is used in an analog baseband circuits. The RF tuner IC is implemented in a $0.18-{\mu}m$ CMOS technology. The RF tuner IC satisfies all specifications for DVB-H/T, T-DMB, and ISDB-T with a sufficient margin and a successful demonstration has been carried out for DVB-H/T, T-DMB, and ISDB-T with a digital demodulator.

Scattered Pilot Position Estimation Method Using 4 Symbol Delay for ISDB-T System (ISDB-T 시스템에서 4 심볼 지연을 이용한 분산 파일럿 위치 추정 방법)

  • Kim, Seong Ihl
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38A no.11
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    • pp.979-981
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    • 2013
  • In this paper, this study is aimed how to estimate the position of scattered pilot to be used to estimate channel in the OFDM System. The proposed method is possible to estimate the accurate position of scattered pilot to remove the phase error through cross-correlation between received signal and 4 symbol delay received signal.

VHDL Design of Pragmatic Trellis Coded Modulation for Adaptive Satellite Broadcasting (적응형 위성방송용 프레그메틱 트렐리스 부호화기 VHDL 설계)

  • 정지원
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.12
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    • pp.1256-1263
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    • 2003
  • In this paper, we analyzed the channel coding scheme of DVB and ISDB standard for high-speed satellite broadcasting. Also, this paper proposed optimal parameters of decoder with variable coding rate for implementation. According to the optimal parameters, the pragmatic TCM of rate 213, 5/6, 819 was modeled by VHDL. The results designed by VHDL can be verified.