Experimental research on a mobile receiver with high sensitivity for the terrestrial digital television broadcast signals

高灵敏度地面数字电视广播信号移动接收机实验研究

• 批准号: 13555111
• 负责人: OGAWA Akira
• 金额: $ 8.77万
• 依托单位: Meijo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555111/
• 关键词: Terrestrial digital television broadcast; Highly sensitive mobile receiver; Diversity; Iterative decoding; OFDM; QAM; ダイバーシチ; 誤り訂正

This research is concerned with a diversity combining scheme in which the diversity technique is combined with error correcting decoding in an attempt to improve the performance with a mobile reception. In this report, the results of the research conducted to evaluate the performance of the scheme are summarized. In the beginning, a hardware implementation had been planned, but this plan had been given up for the reason of the cost higher than expected. In stead the virtual receiver has been developed with soft wears to simulate the behavior of the performance of the diversity decoding scheme. The performance of the diversity decoding scheme has been evaluated under various environments. The conducted research items are as follows : (1)Research on the symbol synchronization schemes for OFDM signals, (2)Performance evaluation under Rayleigh fading environment, (3)Performance evaluation under multipath environment, (4)Performance evaluation for the system applying a punctured convolutional code actually adopted in the digital TV system, (5)Performance evaluation when applying a simple M-algorithm in place of Viterbi algorithm, (6) Development of, soft wares to simulate the receiver and the propagation path.Although we could not fulfill the object of the hard wear development and experiment, we could verify the performance and effectiveness of the diversity decoding scheme with the soft wear. The concept of the diversity decoding scheme is considered to be applicable to various mobile communication systems besides the terrestrial digital TV broadcast and OFDM systems. We will make an effort to develop a simplified decoding process and an improved scheme hoping to have a chance to implement a hard ware for the purpose of ensuring the effectiveness.

本文研究了一种将分集技术与纠错译码相结合的分集组合方案，以提高移动接收性能。在本报告中，对评估该方案性能的研究结果进行了总结。一开始，曾计划过硬件实现，但由于成本高于预期而放弃了这个计划。在此基础上，设计了带有软磨损的虚拟接收机来模拟分集译码方案的性能。对分集译码方案在各种环境下的性能进行了评价。所进行的研究项目如下：(1)研究OFDM信号的符号同步方案，(2)瑞利衰落环境下的性能评估，(3)多径环境下的性能评估，(4)采用数字电视系统中实际采用的穿孔卷积码的系统性能评估，(5)采用简单m算法代替Viterbi算法的系统性能评估，(6)开发接收机及传播路径仿真软件。虽然我们无法实现硬磨损开发和实验的目标，但我们可以通过软磨损验证分集解码方案的性能和有效性。分集译码方案的概念被认为除了适用于地面数字电视广播和OFDM系统外，还适用于各种移动通信系统。我们将努力开发一个简化的解码过程和一个改进的方案，希望有机会实现一个硬件，以确保有效性。

项目成果

S.Goto, A.Ogawa: "A New Symbol Synchronizer for MC-SS Signals"Proc. of International Symposium on Communications and Information Technology (Chiang Mal, Thailand). 199-202 (2001)

S.Goto，A.Okawa：“MC-SS 信号的新符号同步器”Proc。

T.Yamazato, et al.: "A new diversity decoding scheme for OFDM signals"Proc. of 6^<th> International OFDM-Workshop, Hamburg, Germany. 23-1-23-4 (2001)

T.Yamazato 等人：“一种新的 OFDM 信号分集解码方案”Proc。

伊藤雅尚, 柴田英明, 小川明, 山里敬也: "ダイバシチ受信と誤り訂正復号の融合方式について"2002年電子情報通信学会ソサイエティ大会. B-5-57 (2002)

Masanao Ito、Hideaki Shibata、Akira Okawa、Keiya Yamasato：“关于分集接收和纠错解码的融合方法”2002 IEICE 协会会议 (2002)。

F.Shibata, et al.: "A symbol detection scheme for OFDM signals with subtraction operation"The Journal of the Institute of Image Information and Television. vol.54, no.12. 1788-1791 (2000)

F.Shibata等人：“采用减法运算的OFDM信号的符号检测方案”图像信息电视研究所学报。

M.Ito, A.Ogawa, T.Yamazato: "Performance evaluation of a diversity decoding scheme for punctured convolutional code"Proc.of International Symposium on Information Theory and Its Applications (ISITA2002), Xi'an, China. (2002)

M.Ito、A.Okawa、T.Yamazato：“穿孔卷积码分集解码方案的性能评估”，信息论及其应用国际研讨会（ISITA2002）会议论文集，中国西安。