| 基于DTMB系统的空频发射分集解调 |
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| 引用本文： | 王劲涛,雷伟龙,宋健,杨知行. 基于DTMB系统的空频发射分集解调[J]. 清华大学学报(自然科学版), 2011, 0(4): 566-570 |
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| 作者姓名： | 王劲涛 雷伟龙 宋健 杨知行 |
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| 作者单位： | 清华大学电子工程系;清华大学信息技术研究院; |
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| 基金项目： | 高等学校博士学科点专项科研基金项目(20090002120026); 轨道交通控制与安全国家重点实验室(北京交通大学)开放课题基金项目(RCS2009K009) |
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| 摘 要： | 针对工作在时变深衰落,尤其是存在长时延、能量较强回波的信道环境下的接收机性能下降问题,提出一种在地面数字电视广播系统中使用的空频发射分集的解调方法。当使用传统正交逆矩阵进行空频解码时,需要假设正交频分复用(OFDM)系统中相邻子载波的信道频域响应相同,而这在衰落较强的信道环境下将不再成立。该文提出的空频解码方法无需上述假设,理论分析和计算机仿真的结果均证明,该方法能够有效提高系统在频率选择性较强的信道环境下的接收性能。
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| 关 键 词： | 空频编码 发射分集 数字地面电视多媒体广播(DTMB) 解码 |
Demodulation of space frequency coded transmit diversity based on China's digital terrestrial television broadcasting |
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| WANG Jintao,LEI Weilong,SONG Jian,YANG Zhixing. Demodulation of space frequency coded transmit diversity based on China's digital terrestrial television broadcasting[J]. Journal of Tsinghua University(Science and Technology), 2011, 0(4): 566-570 |
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| Authors: | WANG Jintao LEI Weilong SONG Jian YANG Zhixing |
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| Affiliation: | WANG Jintao1,LEI Weilong2,SONG Jian2,YANG Zhixing1(1.Department of Electronic Engineering,Tsinghua University,Beijing 100084,China,2.Research Institute of Information Technology,China) |
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| Abstract: | The receiver performance degradation is a serious problem in time-variant,deep fading channels with high power echoes and long channel delay.A demodulation method for space frequency coded transmit diversity was developed based on the digital television terrestrial multimedia broadcasting(DTMB) system to solve the problem.The traditional space frequency decoder uses the orthogonal inverse matrix with the assumption that the adjacent sub-channel responses in the frequency domain are similar,which is no longe... |
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| Keywords: | space frequency code transmit diversity digital television terrestrial multimedia broadcasting(DTMB) decode |
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