| 基于DVB-T2的旋转星座解映射算法及其改进 |
| |
| 引用本文： | 石康,王萍. 基于DVB-T2的旋转星座解映射算法及其改进[J]. 电视技术, 2014, 38(7): 136-138,213,130 |
| |
| 作者姓名： | 石康 王萍 |
| |
| 作者单位： | 1.中科院上海微系统与信息技术研究所2.上海师范大学,中科院上海微系统与信息技术研究所 |
| |
| 摘 要： | 在广播和通信领域最新概念中,星座旋转作为一种分集技术被应用于DVB-T2标准。对于旋转星座采用基于硬判决的二维迭代LLR解映射算法进行了一些简化,但由于硬判决带来了误码传播,并且首次软信息计算仍较为复杂。提出了两种改进方案,分别从误码性能和运算复杂度方面对原算法进行了改进。仿真结果表明,信道条件较为恶劣时,改进方法在性能上优于原系统。
|
| 关 键 词： | 旋转星座 解映射 软信息 |
| 收稿时间： | 2013-08-19 |
| 修稿时间： | 2013-10-15 |
Demapping algorithm for Rotated constellation and its improvement based in DVB-T2 |
| |
| shikang and wangping. Demapping algorithm for Rotated constellation and its improvement based in DVB-T2[J]. Ideo Engineering, 2014, 38(7): 136-138,213,130 |
| |
| Authors: | shikang and wangping |
| |
| Affiliation: | 1.Shanghai Institute of Microsystem and Information Technology2.Shanghai Normal University,hanghai Institute of Microsystem and Information Technology |
| |
| Abstract: | Constellation rotation as a diversity technology of new concept in the field of broadcast and communication is used in DVB-T2 standard.The two-dimension iterative LLR solution for rotated QAM constellation based on hard decision simplified calculation, but due to the hard decision to bring the error propagation, and the judgment for the first time operation is more complex. This paper presents two improved schemes, respectively from the aspects of BER performance and computation complexity of the original algorithm was improved. The simulation results show that under bad channel conditions, improving methods on the performance is better than that of the original system. |
| |
| Keywords: | Constellation rotation demapping soft information |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《电视技术》浏览原始摘要信息 |
|
点击此处可从《电视技术》下载全文 |
|
