| 结合跳频的二重频率分集四相差分移相组合编码调制 |
| |
| 引用本文： | 秦义.结合跳频的二重频率分集四相差分移相组合编码调制[J].西安石油大学学报(自然科学版),1997(4). |
| |
| 作者姓名： | 秦义 |
| |
| 作者单位： | 西安石油学院 西安710065 |
| |
| 摘 要： | 提出了一种适于在短波电离层反射信道上传输数据信号的新方案——结合跳频的二重频率分集四相差分移相组合编码(2FD4DPSK/FH)体制。针对短波信道的特点,采用组合编码、跳频和频率分集技术构造出这种编码,解释了这种编码体制抗击短波电离层反射信道上存在的多径时延引起的码间串扰和减小衰落对信号影响的原理。最后确定了该编码体制主要参数的选择范围,分析了采用这种编码体制的短波传输数据系统的整体性能。
|
| 关 键 词： | 无线电信号 数据传输 调制 编码/[跳频 四相差分移相] |
Dual Frequency Diversity Four Phase DPSK Combination Coding Modulation Combiming with Frequency Hopping |
| |
| Qin Yi.Dual Frequency Diversity Four Phase DPSK Combination Coding Modulation Combiming with Frequency Hopping[J].Journal of Xian Shiyou University,1997(4). |
| |
| Authors: | Qin Yi |
| |
| Abstract: | In this paper is put forward a new modulation scheme called dual frequency diversity four phase DPSK combination coding modulation combining with frequency hopping. It can be applied to data transmission on the shortwave multpath channel. In accordance with the features of the shortwave channel, this code is formed by using of combination coding, frequency diversity and frequency hopping techniques. The principle is explained in which the combination coding modulation system reduces the intersymbol interference due to multpath and the effect which fading has on the signals with the help of frequency diversity. Finally, the ranges of the main parameters of the system are determined, and the performance of the shortwave data transmission systems adopting the system is analysed. |
| |
| Keywords: | radio signal data transmission modulation coding/[frequency hopping four phase DPSK] |
| 本文献已被 CNKI 等数据库收录！ |
