| 利用信道编码实现时间分集 |
| |
| 引用本文： | 雷维嘉,谢显中,李广军.利用信道编码实现时间分集[J].电子科技大学学报(社会科学版),2008(1). |
| |
| 作者姓名： | 雷维嘉 谢显中 李广军 |
| |
| 作者单位： | 电子科技大学通信与信息工程学院 成都610054(雷维嘉，李广军)，重庆邮电大学移动通信重点实验室 重庆南岸区400065(谢显中) |
| |
| 基金项目： | 重庆市自然科学基金(CSTC2006BB2363)，教育部留学回国人员科研启动基金([2005]383)，重庆市留学回国人员科技活动择优项目 |
| |
| 摘 要： | 在无线信道中,衰落是影响系统性能的重要因素,而分集技术是对抗衰落的有效手段。该文提出一种利用信道编码,通过在两个码字间进行简单变换,将每个符号的信息分散到两个码字中,同时也将衰落的影响分散到两个码字中,从而获得分集增益。结果显示这种方法能使信道编码,特别是采用概率译码算法的编码(如LDPC编码),纠随机差错的能力更强,能在不增加发射功率和带宽的情况下获得时间分集增益,带来系统性能的提升。
|
| 关 键 词： | 信道编码 码字 分集 衰落 低密度奇偶校验(LDPC)编码 变换 |
Achieving Time Diversity by Using Channel Code |
| |
| LEI Wei-jia,XIE Xian-zhong,LI Guang-jun.Achieving Time Diversity by Using Channel Code[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),2008(1). |
| |
| Authors: | LEI Wei-jia XIE Xian-zhong LI Guang-jun |
| |
| Institution: | LEI Wei-jia1,XIE Xian-zhong2,LI Guang-jun1 |
| |
| Abstract: | The diversity technology is an effective method to resist fading,which is one of the most important factors that influence the system performance in the wireless channel.This paper proposes a time diversity method,in which a simple transform is taken between the symbols of two channel code words to enable the information of each symbol and the influence of fade to be dispersed into two code words.The advantage of the channel code,particularly the codes which adopt the probability decoding algorithm,can be fully utilized.This method can help improve the system performance without increasing the transmitting power and bandwidth. |
| |
| Keywords: | channel code code word diversity fading low-density parity-check(LDPC) code transform |
| 本文献已被 CNKI 等数据库收录！ |
