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。
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.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第1期35-38,共4页
Journal of University of Electronic Science and Technology of China
基金
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
作者简介
雷维嘉（1969-），男，博士生，副教授，主要从事无线通信传输技术方面的研究。
