高速RS(204,188)译码器的FPGA实现

介绍了数字电视广播中广泛采用的RS(204,188)译码器原理和FPGA实现方案,采用并行的三级流水线结构以提高速度,并根据Berlekamp-Massey(BM)算法对译码器进行了优化设计,减少了硬件消耗.译码器的最大时钟频率可以达到75MHz.译码器的性能仿真和FPGA实现验证了该方案的可行性.     

Selection of standards for digital television: The battle for Latin America

This paper analyses the implementation of Terrestrial Digital Technology (TDT) standards in Latin America. The analysis suggests that while some governments have chosen the standard attending to their industrial objectives, others have been influenced by the relevance of network externalities and scale economies and by the political and commercial relationship with their neighbours. The discussion about the technical characteristics of the systems was only relevant in the first years of the process, when the leading countries of the region had still not made their selection. Brazil decided to create its own version of the Japanese ISDB standard in 2006, and in the following years it has persuaded a significant part of the continent to choose it. Another block of countries has adopted the US ATSC standard. The most prominent case is that of Mexico, which has a preferential access to the US market. Only three countries have chosen the European DVB standard, the most widely used standard in the world. Colombia has tried to lead its introduction in the continent, but the results so far have been meagre.     

用普通基比特串行乘法电路实现(204, 188)RS码译码

提高区域创新能力,建设和完善区域创新体系是区域经济持续健康增长的动力源泉;区域创新体系的政策具体目标是促进研发和技术扩散,促进区域人力资源发展,促进科技成果产业化和区域创新环境优化;其政策工具包括直接的财政金融政策和促进区域创新环境的间接政策;我国区域创新政策现在主要依靠科技部门实施,有待于进一步系统化和深化。     

基于共存研究的认知TD-LTE系统检测门限分析

检测门限作为认知无线电系统的重要指标,其合理设置是确保授权系统和认知系统工作的基 础。认知TD-LTE系统对数字电视广播信号的检测门限分析利用系统间共存研究 方法,仿真了不同典型参数下的覆盖区和干扰保护区,基于链路的对称性分析了认知TD-LT E系统对数字电视广播信号的最小检测门限,并验证了此门限下的性能。仿真结果表明, -87 dBm检测门限值既可满足对数字电视系统的保护,也可实现良好的检测和虚警性能。